fat filesystem with disk encryption for sd card driver

12 files changed, 8318 insertions, 51 deletions

diff --git a/fw/fe310/Makefile b/fw/fe310/Makefile
index 76b43bb..96687c7 100644
--- a/fw/fe310/Makefile
+++ b/fw/fe310/Makefile
@@ -2,7 +2,7 @@ include common.mk
 
 CFLAGS += -I./include
 
-subdirs = bsp/drivers bsp/gloss bsp/metal eos eos/i2c eos/eve eos/eve/screen eos/eve/widget eos/app
+subdirs = bsp/drivers bsp/gloss bsp/metal eos eos/i2c eos/eve eos/eve/screen eos/eve/widget eos/app crypto fsfat
 
 all: libeos.a
 
diff --git a/fw/fe310/crypto/Makefile b/fw/fe310/crypto/Makefile
new file mode 100644
index 0000000..2230d6a
--- /dev/null
+++ b/fw/fe310/crypto/Makefile
@@ -0,0 +1,17 @@
+include ../common.mk
+
+CRYPTO_DIR = ../../../crypto
+
+obj = $(CRYPTO_DIR)/aes/aes.o $(CRYPTO_DIR)/blowfish/blowfish.o $(CRYPTO_DIR)/sha/sha1.o
+
+
+%.o: %.c %.h
+	$(CC) $(CFLAGS) -c $<
+
+%.o: %.S
+	$(CC) $(CFLAGS) -c $<
+
+all: $(obj)
+
+clean:
+	rm -f *.o $(obj)
diff --git a/fw/fe310/eos/sdc_crypto.c b/fw/fe310/eos/sdc_crypto.c
new file mode 100644
index 0000000..c094468
--- /dev/null
+++ b/fw/fe310/eos/sdc_crypto.c
@@ -0,0 +1,51 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "sha/sha1.h"
+#include "sdc_crypto.h"
+
+#define SDC_CRYPTO_KEY_SIZE     16
+#define SDC_CRYPTO_BLK_SIZE     16
+#define SDC_CRYPTO_HASH_SIZE    20
+
+EOSSDCCrypto *sdc_crypto;
+
+void eos_sdcc_init(EOSSDCCrypto *crypto, uint8_t *key, void *ctx, eve_sdcc_init_t init, eve_sdcc_crypt_t enc, eve_sdcc_crypt_t dec, void *ctx_essiv, eve_sdcc_init_t init_essiv, eve_sdcc_essiv_t enc_essiv) {
+    char key_essiv[SDC_CRYPTO_HASH_SIZE];
+
+    sdc_crypto = crypto;
+
+    memset(key_essiv, 0, SDC_CRYPTO_HASH_SIZE);
+    init(ctx, key);
+    sdc_crypto->ctx = ctx;
+    sdc_crypto->enc = enc;
+    sdc_crypto->dec = dec;
+
+    SHA1(key_essiv, key, SDC_CRYPTO_KEY_SIZE);
+    init_essiv(ctx_essiv, key_essiv);
+    sdc_crypto->ctx_essiv = ctx_essiv;
+    sdc_crypto->enc_essiv = enc_essiv;
+}
+
+void eos_sdcc_encrypt(uint32_t sect, uint8_t *buffer) {
+    uint8_t iv[SDC_CRYPTO_BLK_SIZE];
+
+    if (sdc_crypto == NULL) return;
+
+    memset(iv, 0, SDC_CRYPTO_BLK_SIZE);
+    memcpy(iv, &sect, sizeof(sect));
+    sdc_crypto->enc_essiv(sdc_crypto->ctx_essiv, iv);
+    sdc_crypto->enc(sdc_crypto->ctx, iv, buffer, 512);
+}
+
+void eos_sdcc_decrypt(uint32_t sect, uint8_t *buffer) {
+    uint8_t iv[SDC_CRYPTO_BLK_SIZE];
+
+    if (sdc_crypto == NULL) return;
+
+    memset(iv, 0, SDC_CRYPTO_BLK_SIZE);
+    memcpy(iv, &sect, sizeof(sect));
+    sdc_crypto->enc_essiv(sdc_crypto->ctx_essiv, iv);
+    sdc_crypto->dec(sdc_crypto->ctx, iv, buffer, 512);
+}
\ No newline at end of file
diff --git a/fw/fe310/eos/sdc_crypto.h b/fw/fe310/eos/sdc_crypto.h
new file mode 100644
index 0000000..015bf8a
--- /dev/null
+++ b/fw/fe310/eos/sdc_crypto.h
@@ -0,0 +1,18 @@
+#include <stddef.h>
+#include <stdint.h>
+
+typedef void (*eve_sdcc_init_t) (void *, uint8_t *);
+typedef void (*eve_sdcc_crypt_t) (void *, uint8_t *, uint8_t *, size_t);
+typedef void (*eve_sdcc_essiv_t) (void *, uint8_t *);
+
+typedef struct EOSSDCCrypto {
+    void *ctx;
+    eve_sdcc_crypt_t enc;
+    eve_sdcc_crypt_t dec;
+    void *ctx_essiv;
+    eve_sdcc_essiv_t enc_essiv;
+} EOSSDCCrypto;
+
+void eos_sdcc_init(EOSSDCCrypto *crypto, uint8_t *key, void *ctx, eve_sdcc_init_t init, eve_sdcc_crypt_t enc, eve_sdcc_crypt_t dec, void *ctx_essiv, eve_sdcc_init_t init_essiv, eve_sdcc_essiv_t enc_essiv);
+void eos_sdcc_encrypt(uint32_t sect, uint8_t *buffer);
+void eos_sdcc_decrypt(uint32_t sect, uint8_t *buffer);
\ No newline at end of file
diff --git a/fw/fe310/eos/sdcard.c b/fw/fe310/eos/sdcard.c
index 4239707..970ab17 100644
--- a/fw/fe310/eos/sdcard.c
+++ b/fw/fe310/eos/sdcard.c
@@ -1,5 +1,6 @@
 #include <stdlib.h>
 #include <stdint.h>
+#include <stdio.h>
 
 #include "eos.h"
 #include "timer.h"
@@ -7,14 +8,20 @@
 #include "spi.h"
 #include "spi_dev.h"
 
+#include "sdc_crypto.h"
 #include "sdcard.h"
 
+#define SDC_TIMEOUT_CMD         500
+#define SDC_TIMEOUT_READ        200
+#define SDC_TIMEOUT_WRITE       500
+
 #define SDC_POLY_CRC7           0x09
 #define SDC_POLY_CRC16          0x1021
 
 #define SDC_CMD_FLAG_CRC        0x01
 #define SDC_CMD_FLAG_NOCS       0x02
-#define SDC_CMD_FLAG_SKIP       0x08
+#define SDC_CMD_FLAG_NOWAIT     0x04
+#define SDC_CMD_FLAG_RSTUFF     0x08
 
 #define SDC_TOKEN_START_BLK     0xfe
 #define SDC_TOKEN_START_BLKM    0xfc
@@ -37,23 +44,32 @@
 
 #define SDC_NCR                 10
 
-#define SDC_TYPE_MMC            1
-#define SDC_TYPE_SDC1           2
-#define SDC_TYPE_SDC2           3
-
 #define SDC_ERR(rv)             ((rv < 0) ? rv : EOS_ERR)
 
 /* CMD */
 #define GO_IDLE_STATE           0
 #define SEND_OP_COND            1
 #define SEND_IF_COND            8
+#define SEND_CSD                9
+#define STOP_TRANSMISSION       12
 #define SET_BLOCKLEN            16
+#define READ_SINGLE_BLOCK       17
+#define READ_MULTIPLE_BLOCK     18
+#define WRITE_BLOCK             24
+#define WRITE_MULTIPLE_BLOCK    25
+#define ERASE_WR_BLK_START      32
+#define ERASE_WR_BLK_END        33
+#define ERASE                   38
 #define APP_CMD                 55
 #define READ_OCR                58
 
 /* ACMD */
+#define SD_STATUS               13
+#define SET_WR_BLK_ERASE_COUNT  23
 #define SD_APP_OP_COND          41
 
+static uint8_t sdc_type = 0;
+
 static uint8_t sdc_crc7(uint8_t crc, uint8_t b) {
     int i;
 
@@ -83,9 +99,6 @@ static uint32_t sdc_nto(uint64_t start, uint32_t timeout) {
     return (d > timeout) ? 0 : timeout - d;
 }
 
-static void sdc_xchg(unsigned char *buffer, uint16_t len) {
-}
-
 static uint8_t sdc_xchg8(uint8_t data) {
     return eos_spi_xchg8(data, 0);
 }
@@ -98,6 +111,22 @@ static uint32_t sdc_xchg32(uint32_t data) {
     return eos_spi_xchg32(data, 0);
 }
 
+static void sdc_buf_send(unsigned char *buffer, uint16_t len) {
+    int i;
+
+    for (i=0; i<len; i++) {
+        sdc_xchg8(buffer[i]);
+    }
+}
+
+static void sdc_buf_recv(unsigned char *buffer, uint16_t len) {
+    int i;
+
+    for (i=0; i<len; i++) {
+        buffer[i] = sdc_xchg8(0xff);
+    }
+}
+
 static void sdc_select(void) {
     eos_spi_cs_set();
     eos_spi_xchg8(0xff, 0);
@@ -125,7 +154,7 @@ static int sdc_xchg_cmd(uint8_t cmd, uint32_t arg, uint8_t flags) {
     sdc_xchg8(cmd);
     sdc_xchg32(arg);
     sdc_xchg8(crc);
-    if (flags & SDC_CMD_FLAG_SKIP) sdc_xchg8(0xff);
+    if (flags & SDC_CMD_FLAG_RSTUFF) sdc_xchg8(0xff);
 
     i = SDC_NCR;
     do {
@@ -142,11 +171,11 @@ static int sdc_ready(uint32_t timeout) {
 
     if (timeout == 0) return EOS_ERR_BUSY;
     start = eos_time_get_tick();
-	do {
+    do {
         if (eos_time_since(start) > timeout) break;
-		d = sdc_xchg8(0xff);
-	} while (d != 0xff);
-	if (d != 0xff) return EOS_ERR_BUSY;
+        d = sdc_xchg8(0xff);
+    } while (d != 0xff);
+    if (d != 0xff) return EOS_ERR_BUSY;
 
     return EOS_OK;
 }
@@ -157,15 +186,15 @@ static int sdc_block_read(uint8_t *buffer, uint16_t len, uint32_t timeout) {
 
     if (timeout == 0) return EOS_ERR_BUSY;
     start = eos_time_get_tick();
-	do {
+    do {
         if (eos_time_since(start) > timeout) break;
-		token = sdc_xchg8(0xff);
-	} while (token == 0xff);
+        token = sdc_xchg8(0xff);
+    } while (token == 0xff);
     if (token == 0xff) return EOS_ERR_BUSY;
-	if (token != SDC_TOKEN_START_BLK) return EOS_ERR;
+    if (token != SDC_TOKEN_START_BLK) return EOS_ERR;
 
-    sdc_xchg(buffer, len);
-    sdc_xchg16(0xff); /* dummy CRC */
+    sdc_buf_recv(buffer, len);
+    sdc_xchg16(0xffff); /* dummy CRC */
 
     return EOS_OK;
 }
@@ -179,8 +208,8 @@ static int sdc_block_write(uint8_t token, uint8_t *buffer, uint16_t len, uint32_
 
     sdc_xchg8(token);
     if (buffer && len) {
-        sdc_xchg(buffer, len);
-        sdc_xchg16(0xff); /* dummy CRC */
+        sdc_buf_send(buffer, len);
+        sdc_xchg16(0xffff); /* dummy CRC */
 
         d = sdc_xchg8(0xff); /* Response */
         if ((d & SDC_DRESP_MASK) != SDC_DRESP_ACCEPT) return EOS_ERR;
@@ -191,10 +220,11 @@ static int sdc_block_write(uint8_t token, uint8_t *buffer, uint16_t len, uint32_
 
 static int sdc_cmd(uint8_t cmd, uint32_t arg, uint8_t flags, uint32_t timeout) {
     int do_cs = !(flags & SDC_CMD_FLAG_NOCS);
-    int rv;
+    int do_wait = !(flags & SDC_CMD_FLAG_NOWAIT);
+    int rv = EOS_OK;
 
     if (do_cs) sdc_select();
-    rv = sdc_ready(timeout);
+    if (do_wait) rv = sdc_ready(timeout);
     if (rv) {
         if (do_cs) sdc_deselect();
         return rv;
@@ -208,40 +238,39 @@ static int sdc_acmd(uint8_t cmd, uint32_t arg, uint8_t flags, uint32_t timeout)
     int rv;
     uint64_t start;
 
-    if (flags & SDC_CMD_FLAG_NOCS) return EOS_ERR;
-
     start = eos_time_get_tick();
-    rv = sdc_cmd(APP_CMD, 0, flags & SDC_CMD_FLAG_CRC, timeout);
+    rv = sdc_cmd(APP_CMD, 0, flags, timeout);
     if (rv & ~SDC_R1_IDLE_STATE) return rv;
 
+    if (flags & SDC_CMD_FLAG_NOCS) {
+        sdc_deselect();
+        sdc_select();
+    }
     return sdc_cmd(cmd, arg, flags, sdc_nto(start, timeout));
 }
 
-static int sdc_init(uint32_t timeout, uint8_t *type, uint8_t *lba) {
-    uint8_t _type, _lba;
+static int sdc_init(uint32_t timeout) {
     int rv, i;
+    uint8_t _type;
     uint8_t ocr[4];
     uint64_t start;
-
-    _type = 0;
-    _lba = 0;
-
-    eos_time_sleep(10);
     start = eos_time_get_tick();
+
+    eos_time_sleep(100);
     for (i=10; i--;) sdc_xchg8(0xff);     /* 80 dummy cycles */
 
-    rv = sdc_cmd(GO_IDLE_STATE, 0, SDC_CMD_FLAG_CRC, timeout);
+    rv = sdc_cmd(GO_IDLE_STATE, 0, SDC_CMD_FLAG_CRC, SDC_TIMEOUT_CMD);
     if (rv != SDC_R1_IDLE_STATE) return SDC_ERR(rv);
 
     sdc_select();
     rv = sdc_cmd(SEND_IF_COND, 0x1aa, SDC_CMD_FLAG_CRC | SDC_CMD_FLAG_NOCS, sdc_nto(start, timeout));
     switch (rv) {
         case SDC_R1_IDLE_STATE:
-    		for (i=0; i<4; i++) {
-                ocr[i] = sdc_xchg8(0xff);    /* get R7 resp */
+            for (i=0; i<4; i++) {   /* R7 response */
+                ocr[i] = sdc_xchg8(0xff);
             }
             sdc_deselect();
-    		if (ocr[2] == 0x01 && ocr[3] == 0xaa) {     /* Check voltage range: 2.7-3.6V */
+            if (ocr[2] == 0x01 && ocr[3] == 0xaa) {     /* Check voltage range: 2.7-3.6V */
                 do {
                     rv = sdc_acmd(SD_APP_OP_COND, 0x40000000, 0, sdc_nto(start, timeout));
                 } while (rv == SDC_R1_IDLE_STATE);
@@ -250,7 +279,7 @@ static int sdc_init(uint32_t timeout, uint8_t *type, uint8_t *lba) {
                 sdc_select();
                 rv = sdc_cmd(READ_OCR, 0, SDC_CMD_FLAG_NOCS, sdc_nto(start, timeout));
                 if (rv == SDC_R1_READY) {
-    				for (i=0; i<4; i++) {
+                    for (i=0; i<4; i++) {   /* R7 response */
                         ocr[i] = sdc_xchg8(0xff);
                     }
                     sdc_deselect();
@@ -259,8 +288,8 @@ static int sdc_init(uint32_t timeout, uint8_t *type, uint8_t *lba) {
                     return SDC_ERR(rv);
                 }
 
-                _type = SDC_TYPE_SDC2;
-                if (ocr[0] & 0xc0) _lba = 1;
+                _type = EOS_SDC_TYPE_SDC2;
+                if (ocr[0] & 0xc0) _type |= EOS_SDC_CAP_BLK;
             }
             break;
 
@@ -274,7 +303,7 @@ static int sdc_init(uint32_t timeout, uint8_t *type, uint8_t *lba) {
                     } while (rv == SDC_R1_IDLE_STATE);
                     if (rv != SDC_R1_READY) return SDC_ERR(rv);
                 case SDC_R1_READY:
-                    _type = SDC_TYPE_SDC1;
+                    _type = EOS_SDC_TYPE_SDC1;
                     break;
 
                 default:
@@ -282,7 +311,7 @@ static int sdc_init(uint32_t timeout, uint8_t *type, uint8_t *lba) {
                         rv = sdc_cmd(SEND_OP_COND, 0, 0, sdc_nto(start, timeout));
                     } while (rv == SDC_R1_IDLE_STATE);
                     if (rv != SDC_R1_READY) return SDC_ERR(rv);
-                    _type = SDC_TYPE_MMC;
+                    _type = EOS_SDC_TYPE_MMC;
                     break;
 
             }
@@ -293,27 +322,220 @@ static int sdc_init(uint32_t timeout, uint8_t *type, uint8_t *lba) {
             return SDC_ERR(rv);
     }
 
-    if (_type && !_lba) {
+    if (!(_type & EOS_SDC_CAP_BLK)) {
         rv = sdc_cmd(SET_BLOCKLEN, 512, 0, sdc_nto(start, timeout));
         if (rv != SDC_R1_READY) return SDC_ERR(rv);
     }
-    *type = _type;
-    *lba = _lba;
+
+    if (_type & EOS_SDC_TYPE_SDC) {
+        uint8_t csd[16];
+
+        sdc_select();
+        rv = sdc_cmd(SEND_CSD, 0, SDC_CMD_FLAG_NOCS, sdc_nto(start, timeout));
+        if (rv == SDC_R1_READY) {
+            rv = sdc_block_read(csd, 16, sdc_nto(start, timeout));
+        } else {
+            rv = SDC_ERR(rv);
+        }
+        sdc_deselect();
+        if (rv) return rv;
+
+        for (i=0; i<16; i++) {
+            printf("%.2x ", csd[i]);
+        }
+        printf("\n");
+        if (csd[10] & 0x40) _type |= EOS_SDC_CAP_ERASE_EN;
+    }
+
+    eos_spi_set_div(EOS_SPI_DEV_SDC, 5);
+    sdc_type = _type;
     return EOS_OK;
 }
 
-#include <stdio.h>
-
 void eos_sdc_init(void) {
-    uint8_t type, lba;
     int rv;
 
     eos_spi_select(EOS_SPI_DEV_SDC);
-    rv = sdc_init(5000, &type, &lba);
+    rv = sdc_init(5000);
     if (rv) {
         printf("SDC ERROR\n");
     } else {
-        printf("SDC OK:%d %d\n", type, lba);
+        printf("SDC OK:%x\n", sdc_type);
     }
     eos_spi_deselect();
 }
+
+uint8_t eos_sdc_type(void) {
+    return sdc_type & EOS_SDC_TYPE_MASK;
+}
+
+uint8_t eos_sdc_cap(void) {
+    return sdc_type & EOS_SDC_CAP_MASK;
+}
+
+int eos_sdc_get_sect_count(uint32_t timeout, uint32_t *sectors) {
+    int rv;
+    uint8_t csd[16];
+    uint64_t start = eos_time_get_tick();
+
+    sdc_select();
+    rv = sdc_cmd(SEND_CSD, 0, SDC_CMD_FLAG_NOCS, timeout);
+    if (rv == SDC_R1_READY) {
+        rv = sdc_block_read(csd, 16, sdc_nto(start, timeout));
+    } else {
+        rv = SDC_ERR(rv);
+    }
+    sdc_deselect();
+    if (rv) return rv;
+
+    if ((csd[0] >> 6) == 1) {   /* SDCv2 */
+        *sectors = (csd[9] + (csd[8] << 8) + ((csd[7] & 0x3f) << 16) + 1) << 10;
+    } else {                    /* SDCv1 or MMC*/
+        uint8_t n = (csd[5] & 0x0f) + (csd[10] >> 7) + ((csd[9] & 0x03) << 1) + 2;
+        *sectors = (csd[8] >> 6) + (csd[7] << 2) + ((csd[6] & 0x03) << 10) + 1;
+        *sectors = *sectors << (n - 9);
+    }
+
+    return EOS_OK;
+}
+
+int eos_sdc_get_blk_size(uint32_t timeout, uint32_t *size) {
+    int rv;
+    uint8_t rbl[64];    /* SD Status or CSD register */
+    uint64_t start = eos_time_get_tick();
+
+    sdc_select();
+    if (sdc_type & EOS_SDC_TYPE_SDC2) {
+        rv = sdc_acmd(SD_STATUS, 0, SDC_CMD_FLAG_NOCS, timeout);
+        sdc_xchg8(0xff);    /* R2 response */
+    } else {
+        rv = sdc_cmd(SEND_CSD, 0, SDC_CMD_FLAG_NOCS, timeout);
+    }
+    if (rv == SDC_R1_READY) {
+        rv = sdc_block_read(rbl, (sdc_type & EOS_SDC_TYPE_SDC2) ? 64 : 16, sdc_nto(start, timeout));
+    } else {
+        rv = SDC_ERR(rv);
+    }
+    sdc_deselect();
+    if (rv) return rv;
+
+    if (sdc_type & EOS_SDC_TYPE_SDC2) {
+        *size = 16UL << (rbl[10] >> 4);
+    } else if (sdc_type & EOS_SDC_TYPE_SDC1) {
+        *size = (((rbl[10] & 0x3f) << 1) + (rbl[11] >> 7) + 1) << ((rbl[13] >> 6) - 1);
+    } else {
+        *size = (((rbl[10] & 0x7c) >> 2) + 1) * (((rbl[11] & 0x03) << 3) + (rbl[11] >> 5) + 1);
+    }
+
+    return EOS_OK;
+}
+
+int eos_sdc_sync(uint32_t timeout) {
+    int rv;
+
+    sdc_select();
+    rv = sdc_ready(timeout);
+    sdc_deselect();
+
+    return rv;
+}
+
+int eos_sdc_erase(uint32_t blk_start, uint32_t blk_end, uint32_t timeout) {
+    int rv;
+    uint64_t start;
+
+    if (!(sdc_type & EOS_SDC_TYPE_SDC)) return EOS_ERR;
+    if (!(sdc_type & EOS_SDC_CAP_ERASE_EN)) return EOS_ERR;
+    if (!(sdc_type & EOS_SDC_CAP_BLK)) {
+        blk_start *= 512;
+        blk_end *= 512;
+    }
+
+    start = eos_time_get_tick();
+    rv = sdc_cmd(ERASE_WR_BLK_START, blk_start, 0, timeout);
+    if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+    rv = sdc_cmd(ERASE_WR_BLK_END, blk_end, 0, sdc_nto(start, timeout));
+    if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+    rv = sdc_cmd(ERASE, 0, 0, sdc_nto(start, timeout));
+    if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+    return eos_sdc_sync(sdc_nto(start, timeout));
+}
+
+int eos_sdc_sect_read(uint32_t sect, unsigned int count, uint8_t *buffer) {
+    int rv;
+    uint64_t start;
+    uint8_t cmd = ((count == 1) ? READ_SINGLE_BLOCK : READ_MULTIPLE_BLOCK);
+
+    if (!(sdc_type & EOS_SDC_CAP_BLK)) sect *= 512;
+    start = eos_time_get_tick();
+
+    sdc_select();
+    rv = sdc_cmd(cmd, sect, SDC_CMD_FLAG_NOCS, SDC_TIMEOUT_CMD);
+    if (rv == SDC_R1_READY) {
+        int _rv = SDC_R1_READY;
+
+        while (count) {
+            rv = sdc_block_read(buffer, 512, SDC_TIMEOUT_READ);
+            if (rv) break;
+            eos_sdcc_decrypt(sect, buffer);
+            buffer += 512;
+            count--;
+        }
+        if (cmd == READ_MULTIPLE_BLOCK) _rv = sdc_cmd(STOP_TRANSMISSION, 0, SDC_CMD_FLAG_NOCS | SDC_CMD_FLAG_NOWAIT | SDC_CMD_FLAG_RSTUFF, 0);
+        if (!rv && (_rv != SDC_R1_READY)) rv = SDC_ERR(_rv);
+    } else {
+        rv = SDC_ERR(rv);
+    }
+    sdc_deselect();
+
+    return rv;
+}
+
+int eos_sdc_sect_write(uint32_t sect, unsigned int count, uint8_t *buffer) {
+    int rv;
+    uint64_t start;
+
+    if (!(sdc_type & EOS_SDC_CAP_BLK)) sect *= 512;
+    start = eos_time_get_tick();
+
+    if (count == 1) {
+        sdc_select();
+        rv = sdc_cmd(WRITE_BLOCK, sect, SDC_CMD_FLAG_NOCS, SDC_TIMEOUT_CMD);
+        if (rv == SDC_R1_READY) {
+            eos_sdcc_encrypt(sect, buffer);
+            rv = sdc_block_write(SDC_TOKEN_START_BLK, buffer, 512, SDC_TIMEOUT_WRITE);
+        } else {
+            rv = SDC_ERR(rv);
+        }
+        sdc_deselect();
+    } else {
+        if (sdc_type & EOS_SDC_TYPE_SDC) {
+            rv = sdc_acmd(SET_WR_BLK_ERASE_COUNT, count, 0, SDC_TIMEOUT_CMD);
+            if (rv != SDC_R1_READY) return SDC_ERR(rv);
+        }
+
+        sdc_select();
+        rv = sdc_cmd(WRITE_MULTIPLE_BLOCK, sect, SDC_CMD_FLAG_NOCS, SDC_TIMEOUT_CMD);
+        if (rv == SDC_R1_READY) {
+            int _rv;
+
+            while (count) {
+                eos_sdcc_encrypt(sect, buffer);
+                rv = sdc_block_write(SDC_TOKEN_START_BLKM, buffer, 512, SDC_TIMEOUT_WRITE);
+                if (rv) break;
+                buffer += 512;
+                count--;
+            }
+            _rv = sdc_block_write(SDC_TOKEN_STOP_TRAN, NULL, 0, SDC_TIMEOUT_WRITE);
+            if (!rv && (_rv != SDC_R1_READY)) rv = SDC_ERR(_rv);
+        } else {
+            rv = SDC_ERR(rv);
+        }
+        sdc_deselect();
+    }
+
+    return rv;
+}
diff --git a/fw/fe310/eos/sdcard.h b/fw/fe310/eos/sdcard.h
index a0a1ae3..0234f65 100644
--- a/fw/fe310/eos/sdcard.h
+++ b/fw/fe310/eos/sdcard.h
@@ -1,3 +1,22 @@
 #include <stdint.h>
 
+#define EOS_SDC_TYPE_MMC            0x01
+
+#define EOS_SDC_TYPE_SDC1           0x04
+#define EOS_SDC_TYPE_SDC2           0x08
+#define EOS_SDC_TYPE_SDC            0x0c
+#define EOS_SDC_TYPE_MASK           0x0f
+
+#define EOS_SDC_CAP_BLK             0x10
+#define EOS_SDC_CAP_ERASE_EN        0x20
+#define EOS_SDC_CAP_MASK            0xf0
+
 void eos_sdc_init(void);
+uint8_t eos_sdc_type(void);
+uint8_t eos_sdc_cap(void);
+int eos_sdc_get_sect_count(uint32_t timeout, uint32_t *sectors);
+int eos_sdc_get_blk_size(uint32_t timeout, uint32_t *size);
+int eos_sdc_sync(uint32_t timeout);
+int eos_sdc_erase(uint32_t blk_start, uint32_t blk_end, uint32_t timeout);
+int eos_sdc_sect_read(uint32_t sect, unsigned int count, uint8_t *buffer);
+int eos_sdc_sect_write(uint32_t sect, unsigned int count, uint8_t *buffer);
diff --git a/fw/fe310/fsfat/Makefile b/fw/fe310/fsfat/Makefile
new file mode 100644
index 0000000..a20a5be
--- /dev/null
+++ b/fw/fe310/fsfat/Makefile
@@ -0,0 +1,17 @@
+include ../common.mk
+
+CFLAGS += -I. -I..
+
+obj = diskio.o ff.o
+
+
+%.o: %.c %.h
+	$(CC) $(CFLAGS) -c $<
+
+%.o: %.S
+	$(CC) $(CFLAGS) -c $<
+
+all: $(obj)
+
+clean:
+	rm -f *.o
diff --git a/fw/fe310/fsfat/diskio.c b/fw/fe310/fsfat/diskio.c
new file mode 100644
index 0000000..026ffd2
--- /dev/null
+++ b/fw/fe310/fsfat/diskio.c
@@ -0,0 +1,141 @@
+/*-----------------------------------------------------------------------*/

+/* Low level disk I/O module SKELETON for FatFs     (C)ChaN, 2019        */

+/*-----------------------------------------------------------------------*/

+/* If a working storage control module is available, it should be        */

+/* attached to the FatFs via a glue function rather than modifying it.   */

+/* This is an example of glue functions to attach various exsisting      */

+/* storage control modules to the FatFs module with a defined API.       */

+/*-----------------------------------------------------------------------*/

+

+#include "ff.h"         /* Obtains integer types */

+#include "diskio.h"     /* Declarations of disk functions */

+

+#include <eos/sdcard.h>

+

+#define TIMEOUT         1000

+#define TIMEOUT_TRIM    60000

+

+/*-----------------------------------------------------------------------*/

+/* Get Drive Status                                                      */

+/*-----------------------------------------------------------------------*/

+

+DSTATUS disk_status (

+    BYTE pdrv           /* Physical drive nmuber to identify the drive */

+)

+{

+    if (pdrv || (eos_sdc_type() == 0)) return STA_NOINIT;

+    return 0;

+}

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Inidialize a Drive                                                    */

+/*-----------------------------------------------------------------------*/

+

+DSTATUS disk_initialize (

+    BYTE pdrv           /* Physical drive nmuber to identify the drive */

+)

+{

+    if (pdrv || (eos_sdc_type() == 0)) return STA_NOINIT;

+    return 0;

+}

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Read Sector(s)                                                        */

+/*-----------------------------------------------------------------------*/

+

+DRESULT disk_read (

+    BYTE pdrv,          /* Physical drive nmuber to identify the drive */

+    BYTE *buff,         /* Data buffer to store read data */

+    LBA_t sector,       /* Start sector in LBA */

+    UINT count          /* Number of sectors to read */

+)

+{

+    int rv;

+

+    if (pdrv) return RES_PARERR;

+    if (eos_sdc_type() == 0) return RES_NOTRDY;

+

+    rv = eos_sdc_sect_read(sector, count, (uint8_t *)buff);

+    return rv ? RES_ERROR : RES_OK;

+}

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Write Sector(s)                                                       */

+/*-----------------------------------------------------------------------*/

+

+#if FF_FS_READONLY == 0

+

+DRESULT disk_write (

+    BYTE pdrv,          /* Physical drive nmuber to identify the drive */

+    const BYTE *buff,   /* Data to be written */

+    LBA_t sector,       /* Start sector in LBA */

+    UINT count          /* Number of sectors to write */

+)

+{

+    int rv;

+

+    if (pdrv) return RES_PARERR;

+    if (eos_sdc_type() == 0) return RES_NOTRDY;

+

+    rv = eos_sdc_sect_write(sector, count, (uint8_t *)buff);

+    return rv ? RES_ERROR : RES_OK;

+}

+

+#endif

+

+

+/*-----------------------------------------------------------------------*/

+/* Miscellaneous Functions                                               */

+/*-----------------------------------------------------------------------*/

+

+DRESULT disk_ioctl (

+    BYTE pdrv,          /* Physical drive nmuber (0..) */

+    BYTE cmd,           /* Control code */

+    void *buff          /* Buffer to send/receive control data */

+)

+{

+    DRESULT res;

+    uint32_t ret;

+    int rv;

+

+    if (pdrv) return RES_PARERR;

+    if (eos_sdc_type() == 0) return RES_NOTRDY;

+

+    res = RES_ERROR;

+

+    switch (cmd) {

+        case CTRL_SYNC:

+            rv = eos_sdc_sync(TIMEOUT);

+            if (!rv) res = RES_OK;

+            break;

+

+        case GET_SECTOR_COUNT:

+            rv = eos_sdc_get_sect_count(TIMEOUT, &ret);

+            if (!rv) {

+                *(LBA_t*)buff = ret;

+                res = RES_OK;

+            }

+            break;

+

+        case GET_BLOCK_SIZE:

+            rv = eos_sdc_get_blk_size(TIMEOUT, &ret);

+            if (!rv) {

+                *(DWORD*)buff = ret;

+                res = RES_OK;

+            }

+            break;

+

+        case CTRL_TRIM:

+            rv = eos_sdc_erase(((LBA_t*)buff)[0], ((LBA_t*)buff)[1], TIMEOUT_TRIM);

+            if (!rv) res = RES_OK;

+            break;

+    }

+

+    return res;

+}

diff --git a/fw/fe310/fsfat/diskio.h b/fw/fe310/fsfat/diskio.h
new file mode 100644
index 0000000..c22afaa
--- /dev/null
+++ b/fw/fe310/fsfat/diskio.h
@@ -0,0 +1,77 @@
+/*-----------------------------------------------------------------------/

+/  Low level disk interface modlue include file   (C)ChaN, 2019          /

+/-----------------------------------------------------------------------*/

+

+#ifndef _DISKIO_DEFINED

+#define _DISKIO_DEFINED

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+

+/* Status of Disk Functions */

+typedef BYTE	DSTATUS;

+

+/* Results of Disk Functions */

+typedef enum {

+	RES_OK = 0,		/* 0: Successful */

+	RES_ERROR,		/* 1: R/W Error */

+	RES_WRPRT,		/* 2: Write Protected */

+	RES_NOTRDY,		/* 3: Not Ready */

+	RES_PARERR		/* 4: Invalid Parameter */

+} DRESULT;

+

+

+/*---------------------------------------*/

+/* Prototypes for disk control functions */

+

+

+DSTATUS disk_initialize (BYTE pdrv);

+DSTATUS disk_status (BYTE pdrv);

+DRESULT disk_read (BYTE pdrv, BYTE* buff, LBA_t sector, UINT count);

+DRESULT disk_write (BYTE pdrv, const BYTE* buff, LBA_t sector, UINT count);

+DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);

+

+

+/* Disk Status Bits (DSTATUS) */

+

+#define STA_NOINIT		0x01	/* Drive not initialized */

+#define STA_NODISK		0x02	/* No medium in the drive */

+#define STA_PROTECT		0x04	/* Write protected */

+

+

+/* Command code for disk_ioctrl fucntion */

+

+/* Generic command (Used by FatFs) */

+#define CTRL_SYNC			0	/* Complete pending write process (needed at FF_FS_READONLY == 0) */

+#define GET_SECTOR_COUNT	1	/* Get media size (needed at FF_USE_MKFS == 1) */

+#define GET_SECTOR_SIZE		2	/* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */

+#define GET_BLOCK_SIZE		3	/* Get erase block size (needed at FF_USE_MKFS == 1) */

+#define CTRL_TRIM			4	/* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */

+

+/* Generic command (Not used by FatFs) */

+#define CTRL_POWER			5	/* Get/Set power status */

+#define CTRL_LOCK			6	/* Lock/Unlock media removal */

+#define CTRL_EJECT			7	/* Eject media */

+#define CTRL_FORMAT			8	/* Create physical format on the media */

+

+/* MMC/SDC specific ioctl command */

+#define MMC_GET_TYPE		10	/* Get card type */

+#define MMC_GET_CSD			11	/* Get CSD */

+#define MMC_GET_CID			12	/* Get CID */

+#define MMC_GET_OCR			13	/* Get OCR */

+#define MMC_GET_SDSTAT		14	/* Get SD status */

+#define ISDIO_READ			55	/* Read data form SD iSDIO register */

+#define ISDIO_WRITE			56	/* Write data to SD iSDIO register */

+#define ISDIO_MRITE			57	/* Masked write data to SD iSDIO register */

+

+/* ATA/CF specific ioctl command */

+#define ATA_GET_REV			20	/* Get F/W revision */

+#define ATA_GET_MODEL		21	/* Get model name */

+#define ATA_GET_SN			22	/* Get serial number */

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif

diff --git a/fw/fe310/fsfat/ff.c b/fw/fe310/fsfat/ff.c
new file mode 100644
index 0000000..cbdf685
--- /dev/null
+++ b/fw/fe310/fsfat/ff.c
@@ -0,0 +1,6982 @@
+/*----------------------------------------------------------------------------/

+/  FatFs - Generic FAT Filesystem Module  R0.14b                              /

+/-----------------------------------------------------------------------------/

+/

+/ Copyright (C) 2021, ChaN, all right reserved.

+/

+/ FatFs module is an open source software. Redistribution and use of FatFs in

+/ source and binary forms, with or without modification, are permitted provided

+/ that the following condition is met:

+/

+/ 1. Redistributions of source code must retain the above copyright notice,

+/    this condition and the following disclaimer.

+/

+/ This software is provided by the copyright holder and contributors "AS IS"

+/ and any warranties related to this software are DISCLAIMED.

+/ The copyright owner or contributors be NOT LIABLE for any damages caused

+/ by use of this software.

+/

+/----------------------------------------------------------------------------*/

+

+

+#include <string.h>

+#include "ff.h"			/* Declarations of FatFs API */

+#include "diskio.h"		/* Declarations of device I/O functions */

+

+

+/*--------------------------------------------------------------------------

+

+   Module Private Definitions

+

+---------------------------------------------------------------------------*/

+

+#if FF_DEFINED != 86631	/* Revision ID */

+#error Wrong include file (ff.h).

+#endif

+

+

+/* Limits and boundaries */

+#define MAX_DIR		0x200000		/* Max size of FAT directory */

+#define MAX_DIR_EX	0x10000000		/* Max size of exFAT directory */

+#define MAX_FAT12	0xFF5			/* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */

+#define MAX_FAT16	0xFFF5			/* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */

+#define MAX_FAT32	0x0FFFFFF5		/* Max FAT32 clusters (not specified, practical limit) */

+#define MAX_EXFAT	0x7FFFFFFD		/* Max exFAT clusters (differs from specs, implementation limit) */

+

+

+/* Character code support macros */

+#define IsUpper(c)		((c) >= 'A' && (c) <= 'Z')

+#define IsLower(c)		((c) >= 'a' && (c) <= 'z')

+#define IsDigit(c)		((c) >= '0' && (c) <= '9')

+#define IsSeparator(c)	((c) == '/' || (c) == '\\')

+#define IsTerminator(c)	((UINT)(c) < (FF_USE_LFN ? ' ' : '!'))

+#define IsSurrogate(c)	((c) >= 0xD800 && (c) <= 0xDFFF)

+#define IsSurrogateH(c)	((c) >= 0xD800 && (c) <= 0xDBFF)

+#define IsSurrogateL(c)	((c) >= 0xDC00 && (c) <= 0xDFFF)

+

+

+/* Additional file access control and file status flags for internal use */

+#define FA_SEEKEND	0x20	/* Seek to end of the file on file open */

+#define FA_MODIFIED	0x40	/* File has been modified */

+#define FA_DIRTY	0x80	/* FIL.buf[] needs to be written-back */

+

+

+/* Additional file attribute bits for internal use */

+#define AM_VOL		0x08	/* Volume label */

+#define AM_LFN		0x0F	/* LFN entry */

+#define AM_MASK		0x3F	/* Mask of defined bits in FAT */

+#define AM_MASKX	0x37	/* Mask of defined bits in exFAT */

+

+

+/* Name status flags in fn[11] */

+#define NSFLAG		11		/* Index of the name status byte */

+#define NS_LOSS		0x01	/* Out of 8.3 format */

+#define NS_LFN		0x02	/* Force to create LFN entry */

+#define NS_LAST		0x04	/* Last segment */

+#define NS_BODY		0x08	/* Lower case flag (body) */

+#define NS_EXT		0x10	/* Lower case flag (ext) */

+#define NS_DOT		0x20	/* Dot entry */

+#define NS_NOLFN	0x40	/* Do not find LFN */

+#define NS_NONAME	0x80	/* Not followed */

+

+

+/* exFAT directory entry types */

+#define	ET_BITMAP	0x81	/* Allocation bitmap */

+#define	ET_UPCASE	0x82	/* Up-case table */

+#define	ET_VLABEL	0x83	/* Volume label */

+#define	ET_FILEDIR	0x85	/* File and directory */

+#define	ET_STREAM	0xC0	/* Stream extension */

+#define	ET_FILENAME	0xC1	/* Name extension */

+

+

+/* FatFs refers the FAT structure as simple byte array instead of structure member

+/ because the C structure is not binary compatible between different platforms */

+

+#define BS_JmpBoot			0		/* x86 jump instruction (3-byte) */

+#define BS_OEMName			3		/* OEM name (8-byte) */

+#define BPB_BytsPerSec		11		/* Sector size [byte] (WORD) */

+#define BPB_SecPerClus		13		/* Cluster size [sector] (BYTE) */

+#define BPB_RsvdSecCnt		14		/* Size of reserved area [sector] (WORD) */

+#define BPB_NumFATs			16		/* Number of FATs (BYTE) */

+#define BPB_RootEntCnt		17		/* Size of root directory area for FAT [entry] (WORD) */

+#define BPB_TotSec16		19		/* Volume size (16-bit) [sector] (WORD) */

+#define BPB_Media			21		/* Media descriptor byte (BYTE) */

+#define BPB_FATSz16			22		/* FAT size (16-bit) [sector] (WORD) */

+#define BPB_SecPerTrk		24		/* Number of sectors per track for int13h [sector] (WORD) */

+#define BPB_NumHeads		26		/* Number of heads for int13h (WORD) */

+#define BPB_HiddSec			28		/* Volume offset from top of the drive (DWORD) */

+#define BPB_TotSec32		32		/* Volume size (32-bit) [sector] (DWORD) */

+#define BS_DrvNum			36		/* Physical drive number for int13h (BYTE) */

+#define BS_NTres			37		/* WindowsNT error flag (BYTE) */

+#define BS_BootSig			38		/* Extended boot signature (BYTE) */

+#define BS_VolID			39		/* Volume serial number (DWORD) */

+#define BS_VolLab			43		/* Volume label string (8-byte) */

+#define BS_FilSysType		54		/* Filesystem type string (8-byte) */

+#define BS_BootCode			62		/* Boot code (448-byte) */

+#define BS_55AA				510		/* Signature word (WORD) */

+

+#define BPB_FATSz32			36		/* FAT32: FAT size [sector] (DWORD) */

+#define BPB_ExtFlags32		40		/* FAT32: Extended flags (WORD) */

+#define BPB_FSVer32			42		/* FAT32: Filesystem version (WORD) */

+#define BPB_RootClus32		44		/* FAT32: Root directory cluster (DWORD) */

+#define BPB_FSInfo32		48		/* FAT32: Offset of FSINFO sector (WORD) */

+#define BPB_BkBootSec32		50		/* FAT32: Offset of backup boot sector (WORD) */

+#define BS_DrvNum32			64		/* FAT32: Physical drive number for int13h (BYTE) */

+#define BS_NTres32			65		/* FAT32: Error flag (BYTE) */

+#define BS_BootSig32		66		/* FAT32: Extended boot signature (BYTE) */

+#define BS_VolID32			67		/* FAT32: Volume serial number (DWORD) */

+#define BS_VolLab32			71		/* FAT32: Volume label string (8-byte) */

+#define BS_FilSysType32		82		/* FAT32: Filesystem type string (8-byte) */

+#define BS_BootCode32		90		/* FAT32: Boot code (420-byte) */

+

+#define BPB_ZeroedEx		11		/* exFAT: MBZ field (53-byte) */

+#define BPB_VolOfsEx		64		/* exFAT: Volume offset from top of the drive [sector] (QWORD) */

+#define BPB_TotSecEx		72		/* exFAT: Volume size [sector] (QWORD) */

+#define BPB_FatOfsEx		80		/* exFAT: FAT offset from top of the volume [sector] (DWORD) */

+#define BPB_FatSzEx			84		/* exFAT: FAT size [sector] (DWORD) */

+#define BPB_DataOfsEx		88		/* exFAT: Data offset from top of the volume [sector] (DWORD) */

+#define BPB_NumClusEx		92		/* exFAT: Number of clusters (DWORD) */

+#define BPB_RootClusEx		96		/* exFAT: Root directory start cluster (DWORD) */

+#define BPB_VolIDEx			100		/* exFAT: Volume serial number (DWORD) */

+#define BPB_FSVerEx			104		/* exFAT: Filesystem version (WORD) */

+#define BPB_VolFlagEx		106		/* exFAT: Volume flags (WORD) */

+#define BPB_BytsPerSecEx	108		/* exFAT: Log2 of sector size in unit of byte (BYTE) */

+#define BPB_SecPerClusEx	109		/* exFAT: Log2 of cluster size in unit of sector (BYTE) */

+#define BPB_NumFATsEx		110		/* exFAT: Number of FATs (BYTE) */

+#define BPB_DrvNumEx		111		/* exFAT: Physical drive number for int13h (BYTE) */

+#define BPB_PercInUseEx		112		/* exFAT: Percent in use (BYTE) */

+#define BPB_RsvdEx			113		/* exFAT: Reserved (7-byte) */

+#define BS_BootCodeEx		120		/* exFAT: Boot code (390-byte) */

+

+#define DIR_Name			0		/* Short file name (11-byte) */

+#define DIR_Attr			11		/* Attribute (BYTE) */

+#define DIR_NTres			12		/* Lower case flag (BYTE) */

+#define DIR_CrtTime10		13		/* Created time sub-second (BYTE) */

+#define DIR_CrtTime			14		/* Created time (DWORD) */

+#define DIR_LstAccDate		18		/* Last accessed date (WORD) */

+#define DIR_FstClusHI		20		/* Higher 16-bit of first cluster (WORD) */

+#define DIR_ModTime			22		/* Modified time (DWORD) */

+#define DIR_FstClusLO		26		/* Lower 16-bit of first cluster (WORD) */

+#define DIR_FileSize		28		/* File size (DWORD) */

+#define LDIR_Ord			0		/* LFN: LFN order and LLE flag (BYTE) */

+#define LDIR_Attr			11		/* LFN: LFN attribute (BYTE) */

+#define LDIR_Type			12		/* LFN: Entry type (BYTE) */

+#define LDIR_Chksum			13		/* LFN: Checksum of the SFN (BYTE) */

+#define LDIR_FstClusLO		26		/* LFN: MBZ field (WORD) */

+#define XDIR_Type			0		/* exFAT: Type of exFAT directory entry (BYTE) */

+#define XDIR_NumLabel		1		/* exFAT: Number of volume label characters (BYTE) */

+#define XDIR_Label			2		/* exFAT: Volume label (11-WORD) */

+#define XDIR_CaseSum		4		/* exFAT: Sum of case conversion table (DWORD) */

+#define XDIR_NumSec			1		/* exFAT: Number of secondary entries (BYTE) */

+#define XDIR_SetSum			2		/* exFAT: Sum of the set of directory entries (WORD) */

+#define XDIR_Attr			4		/* exFAT: File attribute (WORD) */

+#define XDIR_CrtTime		8		/* exFAT: Created time (DWORD) */

+#define XDIR_ModTime		12		/* exFAT: Modified time (DWORD) */

+#define XDIR_AccTime		16		/* exFAT: Last accessed time (DWORD) */

+#define XDIR_CrtTime10		20		/* exFAT: Created time subsecond (BYTE) */

+#define XDIR_ModTime10		21		/* exFAT: Modified time subsecond (BYTE) */

+#define XDIR_CrtTZ			22		/* exFAT: Created timezone (BYTE) */

+#define XDIR_ModTZ			23		/* exFAT: Modified timezone (BYTE) */

+#define XDIR_AccTZ			24		/* exFAT: Last accessed timezone (BYTE) */

+#define XDIR_GenFlags		33		/* exFAT: General secondary flags (BYTE) */

+#define XDIR_NumName		35		/* exFAT: Number of file name characters (BYTE) */

+#define XDIR_NameHash		36		/* exFAT: Hash of file name (WORD) */

+#define XDIR_ValidFileSize	40		/* exFAT: Valid file size (QWORD) */

+#define XDIR_FstClus		52		/* exFAT: First cluster of the file data (DWORD) */

+#define XDIR_FileSize		56		/* exFAT: File/Directory size (QWORD) */

+

+#define SZDIRE				32		/* Size of a directory entry */

+#define DDEM				0xE5	/* Deleted directory entry mark set to DIR_Name[0] */

+#define RDDEM				0x05	/* Replacement of the character collides with DDEM */

+#define LLEF				0x40	/* Last long entry flag in LDIR_Ord */

+

+#define FSI_LeadSig			0		/* FAT32 FSI: Leading signature (DWORD) */

+#define FSI_StrucSig		484		/* FAT32 FSI: Structure signature (DWORD) */

+#define FSI_Free_Count		488		/* FAT32 FSI: Number of free clusters (DWORD) */

+#define FSI_Nxt_Free		492		/* FAT32 FSI: Last allocated cluster (DWORD) */

+

+#define MBR_Table			446		/* MBR: Offset of partition table in the MBR */

+#define SZ_PTE				16		/* MBR: Size of a partition table entry */

+#define PTE_Boot			0		/* MBR PTE: Boot indicator */

+#define PTE_StHead			1		/* MBR PTE: Start head */

+#define PTE_StSec			2		/* MBR PTE: Start sector */

+#define PTE_StCyl			3		/* MBR PTE: Start cylinder */

+#define PTE_System			4		/* MBR PTE: System ID */

+#define PTE_EdHead			5		/* MBR PTE: End head */

+#define PTE_EdSec			6		/* MBR PTE: End sector */

+#define PTE_EdCyl			7		/* MBR PTE: End cylinder */

+#define PTE_StLba			8		/* MBR PTE: Start in LBA */

+#define PTE_SizLba			12		/* MBR PTE: Size in LBA */

+

+#define GPTH_Sign			0		/* GPT: Header signature (8-byte) */

+#define GPTH_Rev			8		/* GPT: Revision (DWORD) */

+#define GPTH_Size			12		/* GPT: Header size (DWORD) */

+#define GPTH_Bcc			16		/* GPT: Header BCC (DWORD) */

+#define GPTH_CurLba			24		/* GPT: Main header LBA (QWORD) */

+#define GPTH_BakLba			32		/* GPT: Backup header LBA (QWORD) */

+#define GPTH_FstLba			40		/* GPT: First LBA for partitions (QWORD) */

+#define GPTH_LstLba			48		/* GPT: Last LBA for partitions (QWORD) */

+#define GPTH_DskGuid		56		/* GPT: Disk GUID (16-byte) */

+#define GPTH_PtOfs			72		/* GPT: Partation table LBA (QWORD) */

+#define GPTH_PtNum			80		/* GPT: Number of table entries (DWORD) */

+#define GPTH_PteSize		84		/* GPT: Size of table entry (DWORD) */

+#define GPTH_PtBcc			88		/* GPT: Partation table BCC (DWORD) */

+#define SZ_GPTE				128		/* GPT: Size of partition table entry */

+#define GPTE_PtGuid			0		/* GPT PTE: Partition type GUID (16-byte) */

+#define GPTE_UpGuid			16		/* GPT PTE: Partition unique GUID (16-byte) */

+#define GPTE_FstLba			32		/* GPT PTE: First LBA (QWORD) */

+#define GPTE_LstLba			40		/* GPT PTE: Last LBA inclusive (QWORD) */

+#define GPTE_Flags			48		/* GPT PTE: Flags (QWORD) */

+#define GPTE_Name			56		/* GPT PTE: Name */

+

+

+/* Post process on fatal error in the file operations */

+#define ABORT(fs, res)		{ fp->err = (BYTE)(res); LEAVE_FF(fs, res); }

+

+

+/* Re-entrancy related */

+#if FF_FS_REENTRANT

+#if FF_USE_LFN == 1

+#error Static LFN work area cannot be used in thread-safe configuration

+#endif

+#define LEAVE_FF(fs, res)	{ unlock_fs(fs, res); return res; }

+#else

+#define LEAVE_FF(fs, res)	return res

+#endif

+

+

+/* Definitions of logical drive - physical location conversion */

+#if FF_MULTI_PARTITION

+#define LD2PD(vol) VolToPart[vol].pd	/* Get physical drive number */

+#define LD2PT(vol) VolToPart[vol].pt	/* Get partition number (0:auto search, 1..:forced partition number) */

+#else

+#define LD2PD(vol) (BYTE)(vol)	/* Each logical drive is associated with the same physical drive number */

+#define LD2PT(vol) 0			/* Auto partition search */

+#endif

+

+

+/* Definitions of sector size */

+#if (FF_MAX_SS < FF_MIN_SS) || (FF_MAX_SS != 512 && FF_MAX_SS != 1024 && FF_MAX_SS != 2048 && FF_MAX_SS != 4096) || (FF_MIN_SS != 512 && FF_MIN_SS != 1024 && FF_MIN_SS != 2048 && FF_MIN_SS != 4096)

+#error Wrong sector size configuration

+#endif

+#if FF_MAX_SS == FF_MIN_SS

+#define SS(fs)	((UINT)FF_MAX_SS)	/* Fixed sector size */

+#else

+#define SS(fs)	((fs)->ssize)	/* Variable sector size */

+#endif

+

+

+/* Timestamp */

+#if FF_FS_NORTC == 1

+#if FF_NORTC_YEAR < 1980 || FF_NORTC_YEAR > 2107 || FF_NORTC_MON < 1 || FF_NORTC_MON > 12 || FF_NORTC_MDAY < 1 || FF_NORTC_MDAY > 31

+#error Invalid FF_FS_NORTC settings

+#endif

+#define GET_FATTIME()	((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)

+#else

+#define GET_FATTIME()	get_fattime()

+#endif

+

+

+/* File lock controls */

+#if FF_FS_LOCK != 0

+#if FF_FS_READONLY

+#error FF_FS_LOCK must be 0 at read-only configuration

+#endif

+typedef struct {

+	FATFS *fs;		/* Object ID 1, volume (NULL:blank entry) */

+	DWORD clu;		/* Object ID 2, containing directory (0:root) */

+	DWORD ofs;		/* Object ID 3, offset in the directory */

+	WORD ctr;		/* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */

+} FILESEM;

+#endif

+

+

+/* SBCS up-case tables (\x80-\xFF) */

+#define TBL_CT437  {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \

+					0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT720  {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT737  {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \

+					0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT771  {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}

+#define TBL_CT775  {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \

+					0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \

+					0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT850  {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \

+					0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \

+					0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \

+					0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT852  {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \

+					0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \

+					0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}

+#define TBL_CT855  {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \

+					0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \

+					0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \

+					0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \

+					0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT857  {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \

+					0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \

+					0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT860  {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \

+					0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT861  {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \

+					0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \

+					0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT862  {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT863  {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \

+					0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \

+					0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT864  {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \

+					0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT865  {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \

+					0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \

+					0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT866  {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \

+					0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}

+#define TBL_CT869  {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \

+					0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \

+					0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \

+					0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \

+					0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \

+					0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \

+					0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \

+					0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}

+

+

+/* DBCS code range |----- 1st byte -----|  |----------- 2nd byte -----------| */

+/*                  <------>    <------>    <------>    <------>    <------>  */

+#define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00}

+#define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00}

+#define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE}

+#define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00}

+

+

+/* Macros for table definitions */

+#define MERGE_2STR(a, b) a ## b

+#define MKCVTBL(hd, cp) MERGE_2STR(hd, cp)

+

+

+

+

+/*--------------------------------------------------------------------------

+

+   Module Private Work Area

+

+---------------------------------------------------------------------------*/

+/* Remark: Variables defined here without initial value shall be guaranteed

+/  zero/null at start-up. If not, the linker option or start-up routine is

+/  not compliance with C standard. */

+

+/*--------------------------------*/

+/* File/Volume controls           */

+/*--------------------------------*/

+

+#if FF_VOLUMES < 1 || FF_VOLUMES > 10

+#error Wrong FF_VOLUMES setting

+#endif

+static FATFS* FatFs[FF_VOLUMES];	/* Pointer to the filesystem objects (logical drives) */

+static WORD Fsid;					/* Filesystem mount ID */

+

+#if FF_FS_RPATH != 0

+static BYTE CurrVol;				/* Current drive */

+#endif

+

+#if FF_FS_LOCK != 0

+static FILESEM Files[FF_FS_LOCK];	/* Open object lock semaphores */

+#endif

+

+#if FF_STR_VOLUME_ID

+#ifdef FF_VOLUME_STRS

+static const char* const VolumeStr[FF_VOLUMES] = {FF_VOLUME_STRS};	/* Pre-defined volume ID */

+#endif

+#endif

+

+#if FF_LBA64

+#if FF_MIN_GPT > 0x100000000

+#error Wrong FF_MIN_GPT setting

+#endif

+static const BYTE GUID_MS_Basic[16] = {0xA2,0xA0,0xD0,0xEB,0xE5,0xB9,0x33,0x44,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7};

+#endif

+

+

+

+/*--------------------------------*/

+/* LFN/Directory working buffer   */

+/*--------------------------------*/

+

+#if FF_USE_LFN == 0		/* Non-LFN configuration */

+#if FF_FS_EXFAT

+#error LFN must be enabled when enable exFAT

+#endif

+#define DEF_NAMBUF

+#define INIT_NAMBUF(fs)

+#define FREE_NAMBUF()

+#define LEAVE_MKFS(res)	return res

+

+#else					/* LFN configurations */

+#if FF_MAX_LFN < 12 || FF_MAX_LFN > 255

+#error Wrong setting of FF_MAX_LFN

+#endif

+#if FF_LFN_BUF < FF_SFN_BUF || FF_SFN_BUF < 12

+#error Wrong setting of FF_LFN_BUF or FF_SFN_BUF

+#endif

+#if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3

+#error Wrong setting of FF_LFN_UNICODE

+#endif

+static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};	/* FAT: Offset of LFN characters in the directory entry */

+#define MAXDIRB(nc)	((nc + 44U) / 15 * SZDIRE)	/* exFAT: Size of directory entry block scratchpad buffer needed for the name length */

+

+#if FF_USE_LFN == 1		/* LFN enabled with static working buffer */

+#if FF_FS_EXFAT

+static BYTE	DirBuf[MAXDIRB(FF_MAX_LFN)];	/* Directory entry block scratchpad buffer */

+#endif

+static WCHAR LfnBuf[FF_MAX_LFN + 1];		/* LFN working buffer */

+#define DEF_NAMBUF

+#define INIT_NAMBUF(fs)

+#define FREE_NAMBUF()

+#define LEAVE_MKFS(res)	return res

+

+#elif FF_USE_LFN == 2 	/* LFN enabled with dynamic working buffer on the stack */

+#if FF_FS_EXFAT

+#define DEF_NAMBUF		WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)];	/* LFN working buffer and directory entry block scratchpad buffer */

+#define INIT_NAMBUF(fs)	{ (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }

+#define FREE_NAMBUF()

+#else

+#define DEF_NAMBUF		WCHAR lbuf[FF_MAX_LFN+1];	/* LFN working buffer */

+#define INIT_NAMBUF(fs)	{ (fs)->lfnbuf = lbuf; }

+#define FREE_NAMBUF()

+#endif

+#define LEAVE_MKFS(res)	return res

+

+#elif FF_USE_LFN == 3 	/* LFN enabled with dynamic working buffer on the heap */

+#if FF_FS_EXFAT

+#define DEF_NAMBUF		WCHAR *lfn;	/* Pointer to LFN working buffer and directory entry block scratchpad buffer */

+#define INIT_NAMBUF(fs)	{ lfn = ff_memalloc((FF_MAX_LFN+1)*2 + MAXDIRB(FF_MAX_LFN)); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+FF_MAX_LFN+1); }

+#define FREE_NAMBUF()	ff_memfree(lfn)

+#else

+#define DEF_NAMBUF		WCHAR *lfn;	/* Pointer to LFN working buffer */

+#define INIT_NAMBUF(fs)	{ lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }

+#define FREE_NAMBUF()	ff_memfree(lfn)

+#endif

+#define LEAVE_MKFS(res)	{ if (!work) ff_memfree(buf); return res; }

+#define MAX_MALLOC	0x8000	/* Must be >=FF_MAX_SS */

+

+#else

+#error Wrong setting of FF_USE_LFN

+

+#endif	/* FF_USE_LFN == 1 */

+#endif	/* FF_USE_LFN == 0 */

+

+

+

+/*--------------------------------*/

+/* Code conversion tables         */

+/*--------------------------------*/

+

+#if FF_CODE_PAGE == 0	/* Run-time code page configuration */

+#define CODEPAGE CodePage

+static WORD CodePage;	/* Current code page */

+static const BYTE *ExCvt, *DbcTbl;	/* Pointer to current SBCS up-case table and DBCS code range table below */

+

+static const BYTE Ct437[] = TBL_CT437;

+static const BYTE Ct720[] = TBL_CT720;

+static const BYTE Ct737[] = TBL_CT737;

+static const BYTE Ct771[] = TBL_CT771;

+static const BYTE Ct775[] = TBL_CT775;

+static const BYTE Ct850[] = TBL_CT850;

+static const BYTE Ct852[] = TBL_CT852;

+static const BYTE Ct855[] = TBL_CT855;

+static const BYTE Ct857[] = TBL_CT857;

+static const BYTE Ct860[] = TBL_CT860;

+static const BYTE Ct861[] = TBL_CT861;

+static const BYTE Ct862[] = TBL_CT862;

+static const BYTE Ct863[] = TBL_CT863;

+static const BYTE Ct864[] = TBL_CT864;

+static const BYTE Ct865[] = TBL_CT865;

+static const BYTE Ct866[] = TBL_CT866;

+static const BYTE Ct869[] = TBL_CT869;

+static const BYTE Dc932[] = TBL_DC932;

+static const BYTE Dc936[] = TBL_DC936;

+static const BYTE Dc949[] = TBL_DC949;

+static const BYTE Dc950[] = TBL_DC950;

+

+#elif FF_CODE_PAGE < 900	/* Static code page configuration (SBCS) */

+#define CODEPAGE FF_CODE_PAGE

+static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE);

+

+#else					/* Static code page configuration (DBCS) */

+#define CODEPAGE FF_CODE_PAGE

+static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE);

+

+#endif

+

+

+

+

+/*--------------------------------------------------------------------------

+

+   Module Private Functions

+

+---------------------------------------------------------------------------*/

+

+

+/*-----------------------------------------------------------------------*/

+/* Load/Store multi-byte word in the FAT structure                       */

+/*-----------------------------------------------------------------------*/

+

+static WORD ld_word (const BYTE* ptr)	/*	 Load a 2-byte little-endian word */

+{

+	WORD rv;

+

+	rv = ptr[1];

+	rv = rv << 8 | ptr[0];

+	return rv;

+}

+

+static DWORD ld_dword (const BYTE* ptr)	/* Load a 4-byte little-endian word */

+{

+	DWORD rv;

+

+	rv = ptr[3];

+	rv = rv << 8 | ptr[2];

+	rv = rv << 8 | ptr[1];

+	rv = rv << 8 | ptr[0];

+	return rv;

+}

+

+#if FF_FS_EXFAT

+static QWORD ld_qword (const BYTE* ptr)	/* Load an 8-byte little-endian word */

+{

+	QWORD rv;

+

+	rv = ptr[7];

+	rv = rv << 8 | ptr[6];

+	rv = rv << 8 | ptr[5];

+	rv = rv << 8 | ptr[4];

+	rv = rv << 8 | ptr[3];

+	rv = rv << 8 | ptr[2];

+	rv = rv << 8 | ptr[1];

+	rv = rv << 8 | ptr[0];

+	return rv;

+}

+#endif

+

+#if !FF_FS_READONLY

+static void st_word (BYTE* ptr, WORD val)	/* Store a 2-byte word in little-endian */

+{

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val;

+}

+

+static void st_dword (BYTE* ptr, DWORD val)	/* Store a 4-byte word in little-endian */

+{

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val;

+}

+

+#if FF_FS_EXFAT

+static void st_qword (BYTE* ptr, QWORD val)	/* Store an 8-byte word in little-endian */

+{

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val; val >>= 8;

+	*ptr++ = (BYTE)val;

+}

+#endif

+#endif	/* !FF_FS_READONLY */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* String functions                                                      */

+/*-----------------------------------------------------------------------*/

+

+/* Test if the byte is DBC 1st byte */

+static int dbc_1st (BYTE c)

+{

+#if FF_CODE_PAGE == 0		/* Variable code page */

+	if (DbcTbl && c >= DbcTbl[0]) {

+		if (c <= DbcTbl[1]) return 1;					/* 1st byte range 1 */

+		if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;	/* 1st byte range 2 */

+	}

+#elif FF_CODE_PAGE >= 900	/* DBCS fixed code page */

+	if (c >= DbcTbl[0]) {

+		if (c <= DbcTbl[1]) return 1;

+		if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;

+	}

+#else						/* SBCS fixed code page */

+	if (c != 0) return 0;	/* Always false */

+#endif

+	return 0;

+}

+

+

+/* Test if the byte is DBC 2nd byte */

+static int dbc_2nd (BYTE c)

+{

+#if FF_CODE_PAGE == 0		/* Variable code page */

+	if (DbcTbl && c >= DbcTbl[4]) {

+		if (c <= DbcTbl[5]) return 1;					/* 2nd byte range 1 */

+		if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;	/* 2nd byte range 2 */

+		if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;	/* 2nd byte range 3 */

+	}

+#elif FF_CODE_PAGE >= 900	/* DBCS fixed code page */

+	if (c >= DbcTbl[4]) {

+		if (c <= DbcTbl[5]) return 1;

+		if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;

+		if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;

+	}

+#else						/* SBCS fixed code page */

+	if (c != 0) return 0;	/* Always false */

+#endif

+	return 0;

+}

+

+

+#if FF_USE_LFN

+

+/* Get a Unicode code point from the TCHAR string in defined API encodeing */

+static DWORD tchar2uni (	/* Returns a character in UTF-16 encoding (>=0x10000 on surrogate pair, 0xFFFFFFFF on decode error) */

+	const TCHAR** str		/* Pointer to pointer to TCHAR string in configured encoding */

+)

+{

+	DWORD uc;

+	const TCHAR *p = *str;

+

+#if FF_LFN_UNICODE == 1		/* UTF-16 input */

+	WCHAR wc;

+

+	uc = *p++;	/* Get a unit */

+	if (IsSurrogate(uc)) {	/* Surrogate? */

+		wc = *p++;		/* Get low surrogate */

+		if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF;	/* Wrong surrogate? */

+		uc = uc << 16 | wc;

+	}

+

+#elif FF_LFN_UNICODE == 2	/* UTF-8 input */

+	BYTE b;

+	int nf;

+

+	uc = (BYTE)*p++;	/* Get an encoding unit */

+	if (uc & 0x80) {	/* Multiple byte code? */

+		if        ((uc & 0xE0) == 0xC0) {	/* 2-byte sequence? */

+			uc &= 0x1F; nf = 1;

+		} else if ((uc & 0xF0) == 0xE0) {	/* 3-byte sequence? */

+			uc &= 0x0F; nf = 2;

+		} else if ((uc & 0xF8) == 0xF0) {	/* 4-byte sequence? */

+			uc &= 0x07; nf = 3;

+		} else {							/* Wrong sequence */

+			return 0xFFFFFFFF;

+		}

+		do {	/* Get trailing bytes */

+			b = (BYTE)*p++;

+			if ((b & 0xC0) != 0x80) return 0xFFFFFFFF;	/* Wrong sequence? */

+			uc = uc << 6 | (b & 0x3F);

+		} while (--nf != 0);

+		if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF;	/* Wrong code? */

+		if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF);	/* Make a surrogate pair if needed */

+	}

+

+#elif FF_LFN_UNICODE == 3	/* UTF-32 input */

+	uc = (TCHAR)*p++;	/* Get a unit */

+	if (uc >= 0x110000 || IsSurrogate(uc)) return 0xFFFFFFFF;	/* Wrong code? */

+	if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF);	/* Make a surrogate pair if needed */

+

+#else		/* ANSI/OEM input */

+	BYTE b;

+	WCHAR wc;

+

+	wc = (BYTE)*p++;			/* Get a byte */

+	if (dbc_1st((BYTE)wc)) {	/* Is it a DBC 1st byte? */

+		b = (BYTE)*p++;			/* Get 2nd byte */

+		if (!dbc_2nd(b)) return 0xFFFFFFFF;	/* Invalid code? */

+		wc = (wc << 8) + b;		/* Make a DBC */

+	}

+	if (wc != 0) {

+		wc = ff_oem2uni(wc, CODEPAGE);	/* ANSI/OEM ==> Unicode */

+		if (wc == 0) return 0xFFFFFFFF;	/* Invalid code? */

+	}

+	uc = wc;

+

+#endif

+	*str = p;	/* Next read pointer */

+	return uc;

+}

+

+

+/* Store a Unicode char in defined API encoding */

+static UINT put_utf (	/* Returns number of encoding units written (0:buffer overflow or wrong encoding) */

+	DWORD chr,	/* UTF-16 encoded character (Surrogate pair if >=0x10000) */

+	TCHAR* buf,	/* Output buffer */

+	UINT szb	/* Size of the buffer */

+)

+{

+#if FF_LFN_UNICODE == 1	/* UTF-16 output */

+	WCHAR hs, wc;

+

+	hs = (WCHAR)(chr >> 16);

+	wc = (WCHAR)chr;

+	if (hs == 0) {	/* Single encoding unit? */

+		if (szb < 1 || IsSurrogate(wc)) return 0;	/* Buffer overflow or wrong code? */

+		*buf = wc;

+		return 1;

+	}

+	if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0;	/* Buffer overflow or wrong surrogate? */

+	*buf++ = hs;

+	*buf++ = wc;

+	return 2;

+

+#elif FF_LFN_UNICODE == 2	/* UTF-8 output */

+	DWORD hc;

+

+	if (chr < 0x80) {	/* Single byte code? */

+		if (szb < 1) return 0;	/* Buffer overflow? */

+		*buf = (TCHAR)chr;

+		return 1;

+	}

+	if (chr < 0x800) {	/* 2-byte sequence? */

+		if (szb < 2) return 0;	/* Buffer overflow? */

+		*buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F));

+		*buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));

+		return 2;

+	}

+	if (chr < 0x10000) {	/* 3-byte sequence? */

+		if (szb < 3 || IsSurrogate(chr)) return 0;	/* Buffer overflow or wrong code? */

+		*buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F));

+		*buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));

+		*buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));

+		return 3;

+	}

+	/* 4-byte sequence */

+	if (szb < 4) return 0;	/* Buffer overflow? */

+	hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6;	/* Get high 10 bits */

+	chr = (chr & 0xFFFF) - 0xDC00;					/* Get low 10 bits */

+	if (hc >= 0x100000 || chr >= 0x400) return 0;	/* Wrong surrogate? */

+	chr = (hc | chr) + 0x10000;

+	*buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07));

+	*buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F));

+	*buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));

+	*buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));

+	return 4;

+

+#elif FF_LFN_UNICODE == 3	/* UTF-32 output */

+	DWORD hc;

+

+	if (szb < 1) return 0;	/* Buffer overflow? */

+	if (chr >= 0x10000) {	/* Out of BMP? */

+		hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6;	/* Get high 10 bits */

+		chr = (chr & 0xFFFF) - 0xDC00;					/* Get low 10 bits */

+		if (hc >= 0x100000 || chr >= 0x400) return 0;	/* Wrong surrogate? */

+		chr = (hc | chr) + 0x10000;

+	}

+	*buf++ = (TCHAR)chr;

+	return 1;

+

+#else						/* ANSI/OEM output */

+	WCHAR wc;

+

+	wc = ff_uni2oem(chr, CODEPAGE);

+	if (wc >= 0x100) {	/* Is this a DBC? */

+		if (szb < 2) return 0;

+		*buf++ = (char)(wc >> 8);	/* Store DBC 1st byte */

+		*buf++ = (TCHAR)wc;			/* Store DBC 2nd byte */

+		return 2;

+	}

+	if (wc == 0 || szb < 1) return 0;	/* Invalid char or buffer overflow? */

+	*buf++ = (TCHAR)wc;					/* Store the character */

+	return 1;

+#endif

+}

+#endif	/* FF_USE_LFN */

+

+

+#if FF_FS_REENTRANT

+/*-----------------------------------------------------------------------*/

+/* Request/Release grant to access the volume                            */

+/*-----------------------------------------------------------------------*/

+static int lock_fs (		/* 1:Ok, 0:timeout */

+	FATFS* fs		/* Filesystem object */

+)

+{

+	return ff_req_grant(fs->sobj);

+}

+

+

+static void unlock_fs (

+	FATFS* fs,		/* Filesystem object */

+	FRESULT res		/* Result code to be returned */

+)

+{

+	if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {

+		ff_rel_grant(fs->sobj);

+	}

+}

+

+#endif

+

+

+

+#if FF_FS_LOCK != 0

+/*-----------------------------------------------------------------------*/

+/* File lock control functions                                           */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT chk_lock (	/* Check if the file can be accessed */

+	DIR* dp,		/* Directory object pointing the file to be checked */

+	int acc			/* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */

+)

+{

+	UINT i, be;

+

+	/* Search open object table for the object */

+	be = 0;

+	for (i = 0; i < FF_FS_LOCK; i++) {

+		if (Files[i].fs) {	/* Existing entry */

+			if (Files[i].fs == dp->obj.fs &&	 	/* Check if the object matches with an open object */

+				Files[i].clu == dp->obj.sclust &&

+				Files[i].ofs == dp->dptr) break;

+		} else {			/* Blank entry */

+			be = 1;

+		}

+	}

+	if (i == FF_FS_LOCK) {	/* The object has not been opened */

+		return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK;	/* Is there a blank entry for new object? */

+	}

+

+	/* The object was opened. Reject any open against writing file and all write mode open */

+	return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;

+}

+

+

+static int enq_lock (void)	/* Check if an entry is available for a new object */

+{

+	UINT i;

+

+	for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;

+	return (i == FF_FS_LOCK) ? 0 : 1;

+}

+

+

+static UINT inc_lock (	/* Increment object open counter and returns its index (0:Internal error) */

+	DIR* dp,	/* Directory object pointing the file to register or increment */

+	int acc		/* Desired access (0:Read, 1:Write, 2:Delete/Rename) */

+)

+{

+	UINT i;

+

+

+	for (i = 0; i < FF_FS_LOCK; i++) {	/* Find the object */

+		if (Files[i].fs == dp->obj.fs

+		 && Files[i].clu == dp->obj.sclust

+		 && Files[i].ofs == dp->dptr) break;

+	}

+

+	if (i == FF_FS_LOCK) {			/* Not opened. Register it as new. */

+		for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;

+		if (i == FF_FS_LOCK) return 0;	/* No free entry to register (int err) */

+		Files[i].fs = dp->obj.fs;

+		Files[i].clu = dp->obj.sclust;

+		Files[i].ofs = dp->dptr;

+		Files[i].ctr = 0;

+	}

+

+	if (acc >= 1 && Files[i].ctr) return 0;	/* Access violation (int err) */

+

+	Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1;	/* Set semaphore value */

+

+	return i + 1;	/* Index number origin from 1 */

+}

+

+

+static FRESULT dec_lock (	/* Decrement object open counter */

+	UINT i			/* Semaphore index (1..) */

+)

+{

+	WORD n;

+	FRESULT res;

+

+

+	if (--i < FF_FS_LOCK) {	/* Index number origin from 0 */

+		n = Files[i].ctr;

+		if (n == 0x100) n = 0;	/* If write mode open, delete the entry */

+		if (n > 0) n--;			/* Decrement read mode open count */

+		Files[i].ctr = n;

+		if (n == 0) Files[i].fs = 0;	/* Delete the entry if open count gets zero */

+		res = FR_OK;

+	} else {

+		res = FR_INT_ERR;		/* Invalid index nunber */

+	}

+	return res;

+}

+

+

+static void clear_lock (	/* Clear lock entries of the volume */

+	FATFS *fs

+)

+{

+	UINT i;

+

+	for (i = 0; i < FF_FS_LOCK; i++) {

+		if (Files[i].fs == fs) Files[i].fs = 0;

+	}

+}

+

+#endif	/* FF_FS_LOCK != 0 */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Move/Flush disk access window in the filesystem object                */

+/*-----------------------------------------------------------------------*/

+#if !FF_FS_READONLY

+static FRESULT sync_window (	/* Returns FR_OK or FR_DISK_ERR */

+	FATFS* fs			/* Filesystem object */

+)

+{

+	FRESULT res = FR_OK;

+

+

+	if (fs->wflag) {	/* Is the disk access window dirty? */

+		if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) {	/* Write it back into the volume */

+			fs->wflag = 0;	/* Clear window dirty flag */

+			if (fs->winsect - fs->fatbase < fs->fsize) {	/* Is it in the 1st FAT? */

+				if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1);	/* Reflect it to 2nd FAT if needed */

+			}

+		} else {

+			res = FR_DISK_ERR;

+		}

+	}

+	return res;

+}

+#endif

+

+

+static FRESULT move_window (	/* Returns FR_OK or FR_DISK_ERR */

+	FATFS* fs,		/* Filesystem object */

+	LBA_t sect		/* Sector LBA to make appearance in the fs->win[] */

+)

+{

+	FRESULT res = FR_OK;

+

+

+	if (sect != fs->winsect) {	/* Window offset changed? */

+#if !FF_FS_READONLY

+		res = sync_window(fs);		/* Flush the window */

+#endif

+		if (res == FR_OK) {			/* Fill sector window with new data */

+			if (disk_read(fs->pdrv, fs->win, sect, 1) != RES_OK) {

+				sect = (LBA_t)0 - 1;	/* Invalidate window if read data is not valid */

+				res = FR_DISK_ERR;

+			}

+			fs->winsect = sect;

+		}

+	}

+	return res;

+}

+

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Synchronize filesystem and data on the storage                        */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT sync_fs (	/* Returns FR_OK or FR_DISK_ERR */

+	FATFS* fs		/* Filesystem object */

+)

+{

+	FRESULT res;

+

+

+	res = sync_window(fs);

+	if (res == FR_OK) {

+		if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {	/* FAT32: Update FSInfo sector if needed */

+			/* Create FSInfo structure */

+			memset(fs->win, 0, sizeof fs->win);

+			st_word(fs->win + BS_55AA, 0xAA55);					/* Boot signature */

+			st_dword(fs->win + FSI_LeadSig, 0x41615252);		/* Leading signature */

+			st_dword(fs->win + FSI_StrucSig, 0x61417272);		/* Structure signature */

+			st_dword(fs->win + FSI_Free_Count, fs->free_clst);	/* Number of free clusters */

+			st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);	/* Last allocated culuster */

+			fs->winsect = fs->volbase + 1;						/* Write it into the FSInfo sector (Next to VBR) */

+			disk_write(fs->pdrv, fs->win, fs->winsect, 1);

+			fs->fsi_flag = 0;

+		}

+		/* Make sure that no pending write process in the lower layer */

+		if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;

+	}

+

+	return res;

+}

+

+#endif

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Get physical sector number from cluster number                        */

+/*-----------------------------------------------------------------------*/

+

+static LBA_t clst2sect (	/* !=0:Sector number, 0:Failed (invalid cluster#) */

+	FATFS* fs,		/* Filesystem object */

+	DWORD clst		/* Cluster# to be converted */

+)

+{

+	clst -= 2;		/* Cluster number is origin from 2 */

+	if (clst >= fs->n_fatent - 2) return 0;		/* Is it invalid cluster number? */

+	return fs->database + (LBA_t)fs->csize * clst;	/* Start sector number of the cluster */

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* FAT access - Read value of an FAT entry                               */

+/*-----------------------------------------------------------------------*/

+

+static DWORD get_fat (		/* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */

+	FFOBJID* obj,	/* Corresponding object */

+	DWORD clst		/* Cluster number to get the value */

+)

+{

+	UINT wc, bc;

+	DWORD val;

+	FATFS *fs = obj->fs;

+

+

+	if (clst < 2 || clst >= fs->n_fatent) {	/* Check if in valid range */

+		val = 1;	/* Internal error */

+

+	} else {

+		val = 0xFFFFFFFF;	/* Default value falls on disk error */

+

+		switch (fs->fs_type) {

+		case FS_FAT12 :

+			bc = (UINT)clst; bc += bc / 2;

+			if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;

+			wc = fs->win[bc++ % SS(fs)];		/* Get 1st byte of the entry */

+			if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;

+			wc |= fs->win[bc % SS(fs)] << 8;	/* Merge 2nd byte of the entry */

+			val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF);	/* Adjust bit position */

+			break;

+

+		case FS_FAT16 :

+			if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;

+			val = ld_word(fs->win + clst * 2 % SS(fs));		/* Simple WORD array */

+			break;

+

+		case FS_FAT32 :

+			if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;

+			val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF;	/* Simple DWORD array but mask out upper 4 bits */

+			break;

+#if FF_FS_EXFAT

+		case FS_EXFAT :

+			if ((obj->objsize != 0 && obj->sclust != 0) || obj->stat == 0) {	/* Object except root dir must have valid data length */

+				DWORD cofs = clst - obj->sclust;	/* Offset from start cluster */

+				DWORD clen = (DWORD)((LBA_t)((obj->objsize - 1) / SS(fs)) / fs->csize);	/* Number of clusters - 1 */

+

+				if (obj->stat == 2 && cofs <= clen) {	/* Is it a contiguous chain? */

+					val = (cofs == clen) ? 0x7FFFFFFF : clst + 1;	/* No data on the FAT, generate the value */

+					break;

+				}

+				if (obj->stat == 3 && cofs < obj->n_cont) {	/* Is it in the 1st fragment? */

+					val = clst + 1; 	/* Generate the value */

+					break;

+				}

+				if (obj->stat != 2) {	/* Get value from FAT if FAT chain is valid */

+					if (obj->n_frag != 0) {	/* Is it on the growing edge? */

+						val = 0x7FFFFFFF;	/* Generate EOC */

+					} else {

+						if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;

+						val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;

+					}

+					break;

+				}

+			}

+			val = 1;	/* Internal error */

+			break;

+#endif

+		default:

+			val = 1;	/* Internal error */

+		}

+	}

+

+	return val;

+}

+

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* FAT access - Change value of an FAT entry                             */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT put_fat (	/* FR_OK(0):succeeded, !=0:error */

+	FATFS* fs,		/* Corresponding filesystem object */

+	DWORD clst,		/* FAT index number (cluster number) to be changed */

+	DWORD val		/* New value to be set to the entry */

+)

+{

+	UINT bc;

+	BYTE *p;

+	FRESULT res = FR_INT_ERR;

+

+

+	if (clst >= 2 && clst < fs->n_fatent) {	/* Check if in valid range */

+		switch (fs->fs_type) {

+		case FS_FAT12:

+			bc = (UINT)clst; bc += bc / 2;	/* bc: byte offset of the entry */

+			res = move_window(fs, fs->fatbase + (bc / SS(fs)));

+			if (res != FR_OK) break;

+			p = fs->win + bc++ % SS(fs);

+			*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;	/* Update 1st byte */

+			fs->wflag = 1;

+			res = move_window(fs, fs->fatbase + (bc / SS(fs)));

+			if (res != FR_OK) break;

+			p = fs->win + bc % SS(fs);

+			*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));	/* Update 2nd byte */

+			fs->wflag = 1;

+			break;

+

+		case FS_FAT16:

+			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));

+			if (res != FR_OK) break;

+			st_word(fs->win + clst * 2 % SS(fs), (WORD)val);	/* Simple WORD array */

+			fs->wflag = 1;

+			break;

+

+		case FS_FAT32:

+#if FF_FS_EXFAT

+		case FS_EXFAT:

+#endif

+			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));

+			if (res != FR_OK) break;

+			if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {

+				val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);

+			}

+			st_dword(fs->win + clst * 4 % SS(fs), val);

+			fs->wflag = 1;

+			break;

+		}

+	}

+	return res;

+}

+

+#endif /* !FF_FS_READONLY */

+

+

+

+

+#if FF_FS_EXFAT && !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* exFAT: Accessing FAT and Allocation Bitmap                            */

+/*-----------------------------------------------------------------------*/

+

+/*--------------------------------------*/

+/* Find a contiguous free cluster block */

+/*--------------------------------------*/

+

+static DWORD find_bitmap (	/* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */

+	FATFS* fs,	/* Filesystem object */

+	DWORD clst,	/* Cluster number to scan from */

+	DWORD ncl	/* Number of contiguous clusters to find (1..) */

+)

+{

+	BYTE bm, bv;

+	UINT i;

+	DWORD val, scl, ctr;

+

+

+	clst -= 2;	/* The first bit in the bitmap corresponds to cluster #2 */

+	if (clst >= fs->n_fatent - 2) clst = 0;

+	scl = val = clst; ctr = 0;

+	for (;;) {

+		if (move_window(fs, fs->bitbase + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF;

+		i = val / 8 % SS(fs); bm = 1 << (val % 8);

+		do {

+			do {

+				bv = fs->win[i] & bm; bm <<= 1;		/* Get bit value */

+				if (++val >= fs->n_fatent - 2) {	/* Next cluster (with wrap-around) */

+					val = 0; bm = 0; i = SS(fs);

+				}

+				if (bv == 0) {	/* Is it a free cluster? */

+					if (++ctr == ncl) return scl + 2;	/* Check if run length is sufficient for required */

+				} else {

+					scl = val; ctr = 0;		/* Encountered a cluster in-use, restart to scan */

+				}

+				if (val == clst) return 0;	/* All cluster scanned? */

+			} while (bm != 0);

+			bm = 1;

+		} while (++i < SS(fs));

+	}

+}

+

+

+/*----------------------------------------*/

+/* Set/Clear a block of allocation bitmap */

+/*----------------------------------------*/

+

+static FRESULT change_bitmap (

+	FATFS* fs,	/* Filesystem object */

+	DWORD clst,	/* Cluster number to change from */

+	DWORD ncl,	/* Number of clusters to be changed */

+	int bv		/* bit value to be set (0 or 1) */

+)

+{

+	BYTE bm;

+	UINT i;

+	LBA_t sect;

+

+

+	clst -= 2;	/* The first bit corresponds to cluster #2 */

+	sect = fs->bitbase + clst / 8 / SS(fs);	/* Sector address */

+	i = clst / 8 % SS(fs);					/* Byte offset in the sector */

+	bm = 1 << (clst % 8);					/* Bit mask in the byte */

+	for (;;) {

+		if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;

+		do {

+			do {

+				if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR;	/* Is the bit expected value? */

+				fs->win[i] ^= bm;	/* Flip the bit */

+				fs->wflag = 1;

+				if (--ncl == 0) return FR_OK;	/* All bits processed? */

+			} while (bm <<= 1);		/* Next bit */

+			bm = 1;

+		} while (++i < SS(fs));		/* Next byte */

+		i = 0;

+	}

+}

+

+

+/*---------------------------------------------*/

+/* Fill the first fragment of the FAT chain    */

+/*---------------------------------------------*/

+

+static FRESULT fill_first_frag (

+	FFOBJID* obj	/* Pointer to the corresponding object */

+)

+{

+	FRESULT res;

+	DWORD cl, n;

+

+

+	if (obj->stat == 3) {	/* Has the object been changed 'fragmented' in this session? */

+		for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) {	/* Create cluster chain on the FAT */

+			res = put_fat(obj->fs, cl, cl + 1);

+			if (res != FR_OK) return res;

+		}

+		obj->stat = 0;	/* Change status 'FAT chain is valid' */

+	}

+	return FR_OK;

+}

+

+

+/*---------------------------------------------*/

+/* Fill the last fragment of the FAT chain     */

+/*---------------------------------------------*/

+

+static FRESULT fill_last_frag (

+	FFOBJID* obj,	/* Pointer to the corresponding object */

+	DWORD lcl,		/* Last cluster of the fragment */

+	DWORD term		/* Value to set the last FAT entry */

+)

+{

+	FRESULT res;

+

+

+	while (obj->n_frag > 0) {	/* Create the chain of last fragment */

+		res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term);

+		if (res != FR_OK) return res;

+		obj->n_frag--;

+	}

+	return FR_OK;

+}

+

+#endif	/* FF_FS_EXFAT && !FF_FS_READONLY */

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* FAT handling - Remove a cluster chain                                 */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT remove_chain (	/* FR_OK(0):succeeded, !=0:error */

+	FFOBJID* obj,		/* Corresponding object */

+	DWORD clst,			/* Cluster to remove a chain from */

+	DWORD pclst			/* Previous cluster of clst (0 if entire chain) */

+)

+{

+	FRESULT res = FR_OK;

+	DWORD nxt;

+	FATFS *fs = obj->fs;

+#if FF_FS_EXFAT || FF_USE_TRIM

+	DWORD scl = clst, ecl = clst;

+#endif

+#if FF_USE_TRIM

+	LBA_t rt[2];

+#endif

+

+	if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR;	/* Check if in valid range */

+

+	/* Mark the previous cluster 'EOC' on the FAT if it exists */

+	if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {

+		res = put_fat(fs, pclst, 0xFFFFFFFF);

+		if (res != FR_OK) return res;

+	}

+

+	/* Remove the chain */

+	do {

+		nxt = get_fat(obj, clst);			/* Get cluster status */

+		if (nxt == 0) break;				/* Empty cluster? */

+		if (nxt == 1) return FR_INT_ERR;	/* Internal error? */

+		if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error? */

+		if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {

+			res = put_fat(fs, clst, 0);		/* Mark the cluster 'free' on the FAT */

+			if (res != FR_OK) return res;

+		}

+		if (fs->free_clst < fs->n_fatent - 2) {	/* Update FSINFO */

+			fs->free_clst++;

+			fs->fsi_flag |= 1;

+		}

+#if FF_FS_EXFAT || FF_USE_TRIM

+		if (ecl + 1 == nxt) {	/* Is next cluster contiguous? */

+			ecl = nxt;

+		} else {				/* End of contiguous cluster block */

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				res = change_bitmap(fs, scl, ecl - scl + 1, 0);	/* Mark the cluster block 'free' on the bitmap */

+				if (res != FR_OK) return res;

+			}

+#endif

+#if FF_USE_TRIM

+			rt[0] = clst2sect(fs, scl);					/* Start of data area to be freed */

+			rt[1] = clst2sect(fs, ecl) + fs->csize - 1;	/* End of data area to be freed */

+			disk_ioctl(fs->pdrv, CTRL_TRIM, rt);		/* Inform storage device that the data in the block may be erased */

+#endif

+			scl = ecl = nxt;

+		}

+#endif

+		clst = nxt;					/* Next cluster */

+	} while (clst < fs->n_fatent);	/* Repeat while not the last link */

+

+#if FF_FS_EXFAT

+	/* Some post processes for chain status */

+	if (fs->fs_type == FS_EXFAT) {

+		if (pclst == 0) {	/* Has the entire chain been removed? */

+			obj->stat = 0;		/* Change the chain status 'initial' */

+		} else {

+			if (obj->stat == 0) {	/* Is it a fragmented chain from the beginning of this session? */

+				clst = obj->sclust;		/* Follow the chain to check if it gets contiguous */

+				while (clst != pclst) {

+					nxt = get_fat(obj, clst);

+					if (nxt < 2) return FR_INT_ERR;

+					if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;

+					if (nxt != clst + 1) break;	/* Not contiguous? */

+					clst++;

+				}

+				if (clst == pclst) {	/* Has the chain got contiguous again? */

+					obj->stat = 2;		/* Change the chain status 'contiguous' */

+				}

+			} else {

+				if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) {	/* Was the chain fragmented in this session and got contiguous again? */

+					obj->stat = 2;	/* Change the chain status 'contiguous' */

+				}

+			}

+		}

+	}

+#endif

+	return FR_OK;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* FAT handling - Stretch a chain or Create a new chain                  */

+/*-----------------------------------------------------------------------*/

+

+static DWORD create_chain (	/* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */

+	FFOBJID* obj,		/* Corresponding object */

+	DWORD clst			/* Cluster# to stretch, 0:Create a new chain */

+)

+{

+	DWORD cs, ncl, scl;

+	FRESULT res;

+	FATFS *fs = obj->fs;

+

+

+	if (clst == 0) {	/* Create a new chain */

+		scl = fs->last_clst;				/* Suggested cluster to start to find */

+		if (scl == 0 || scl >= fs->n_fatent) scl = 1;

+	}

+	else {				/* Stretch a chain */

+		cs = get_fat(obj, clst);			/* Check the cluster status */

+		if (cs < 2) return 1;				/* Test for insanity */

+		if (cs == 0xFFFFFFFF) return cs;	/* Test for disk error */

+		if (cs < fs->n_fatent) return cs;	/* It is already followed by next cluster */

+		scl = clst;							/* Cluster to start to find */

+	}

+	if (fs->free_clst == 0) return 0;		/* No free cluster */

+

+#if FF_FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		ncl = find_bitmap(fs, scl, 1);				/* Find a free cluster */

+		if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl;	/* No free cluster or hard error? */

+		res = change_bitmap(fs, ncl, 1, 1);			/* Mark the cluster 'in use' */

+		if (res == FR_INT_ERR) return 1;

+		if (res == FR_DISK_ERR) return 0xFFFFFFFF;

+		if (clst == 0) {							/* Is it a new chain? */

+			obj->stat = 2;							/* Set status 'contiguous' */

+		} else {									/* It is a stretched chain */

+			if (obj->stat == 2 && ncl != scl + 1) {	/* Is the chain got fragmented? */

+				obj->n_cont = scl - obj->sclust;	/* Set size of the contiguous part */

+				obj->stat = 3;						/* Change status 'just fragmented' */

+			}

+		}

+		if (obj->stat != 2) {	/* Is the file non-contiguous? */

+			if (ncl == clst + 1) {	/* Is the cluster next to previous one? */

+				obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2;	/* Increment size of last framgent */

+			} else {				/* New fragment */

+				if (obj->n_frag == 0) obj->n_frag = 1;

+				res = fill_last_frag(obj, clst, ncl);	/* Fill last fragment on the FAT and link it to new one */

+				if (res == FR_OK) obj->n_frag = 1;

+			}

+		}

+	} else

+#endif

+	{	/* On the FAT/FAT32 volume */

+		ncl = 0;

+		if (scl == clst) {						/* Stretching an existing chain? */

+			ncl = scl + 1;						/* Test if next cluster is free */

+			if (ncl >= fs->n_fatent) ncl = 2;

+			cs = get_fat(obj, ncl);				/* Get next cluster status */

+			if (cs == 1 || cs == 0xFFFFFFFF) return cs;	/* Test for error */

+			if (cs != 0) {						/* Not free? */

+				cs = fs->last_clst;				/* Start at suggested cluster if it is valid */

+				if (cs >= 2 && cs < fs->n_fatent) scl = cs;

+				ncl = 0;

+			}

+		}

+		if (ncl == 0) {	/* The new cluster cannot be contiguous and find another fragment */

+			ncl = scl;	/* Start cluster */

+			for (;;) {

+				ncl++;							/* Next cluster */

+				if (ncl >= fs->n_fatent) {		/* Check wrap-around */

+					ncl = 2;

+					if (ncl > scl) return 0;	/* No free cluster found? */

+				}

+				cs = get_fat(obj, ncl);			/* Get the cluster status */

+				if (cs == 0) break;				/* Found a free cluster? */

+				if (cs == 1 || cs == 0xFFFFFFFF) return cs;	/* Test for error */

+				if (ncl == scl) return 0;		/* No free cluster found? */

+			}

+		}

+		res = put_fat(fs, ncl, 0xFFFFFFFF);		/* Mark the new cluster 'EOC' */

+		if (res == FR_OK && clst != 0) {

+			res = put_fat(fs, clst, ncl);		/* Link it from the previous one if needed */

+		}

+	}

+

+	if (res == FR_OK) {			/* Update FSINFO if function succeeded. */

+		fs->last_clst = ncl;

+		if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--;

+		fs->fsi_flag |= 1;

+	} else {

+		ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;	/* Failed. Generate error status */

+	}

+

+	return ncl;		/* Return new cluster number or error status */

+}

+

+#endif /* !FF_FS_READONLY */

+

+

+

+

+#if FF_USE_FASTSEEK

+/*-----------------------------------------------------------------------*/

+/* FAT handling - Convert offset into cluster with link map table        */

+/*-----------------------------------------------------------------------*/

+

+static DWORD clmt_clust (	/* <2:Error, >=2:Cluster number */

+	FIL* fp,		/* Pointer to the file object */

+	FSIZE_t ofs		/* File offset to be converted to cluster# */

+)

+{

+	DWORD cl, ncl, *tbl;

+	FATFS *fs = fp->obj.fs;

+

+

+	tbl = fp->cltbl + 1;	/* Top of CLMT */

+	cl = (DWORD)(ofs / SS(fs) / fs->csize);	/* Cluster order from top of the file */

+	for (;;) {

+		ncl = *tbl++;			/* Number of cluters in the fragment */

+		if (ncl == 0) return 0;	/* End of table? (error) */

+		if (cl < ncl) break;	/* In this fragment? */

+		cl -= ncl; tbl++;		/* Next fragment */

+	}

+	return cl + *tbl;	/* Return the cluster number */

+}

+

+#endif	/* FF_USE_FASTSEEK */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Fill a cluster with zeros                        */

+/*-----------------------------------------------------------------------*/

+

+#if !FF_FS_READONLY

+static FRESULT dir_clear (	/* Returns FR_OK or FR_DISK_ERR */

+	FATFS *fs,		/* Filesystem object */

+	DWORD clst		/* Directory table to clear */

+)

+{

+	LBA_t sect;

+	UINT n, szb;

+	BYTE *ibuf;

+

+

+	if (sync_window(fs) != FR_OK) return FR_DISK_ERR;	/* Flush disk access window */

+	sect = clst2sect(fs, clst);		/* Top of the cluster */

+	fs->winsect = sect;				/* Set window to top of the cluster */

+	memset(fs->win, 0, sizeof fs->win);	/* Clear window buffer */

+#if FF_USE_LFN == 3		/* Quick table clear by using multi-secter write */

+	/* Allocate a temporary buffer */

+	for (szb = ((DWORD)fs->csize * SS(fs) >= MAX_MALLOC) ? MAX_MALLOC : fs->csize * SS(fs), ibuf = 0; szb > SS(fs) && (ibuf = ff_memalloc(szb)) == 0; szb /= 2) ;

+	if (szb > SS(fs)) {		/* Buffer allocated? */

+		memset(ibuf, 0, szb);

+		szb /= SS(fs);		/* Bytes -> Sectors */

+		for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ;	/* Fill the cluster with 0 */

+		ff_memfree(ibuf);

+	} else

+#endif

+	{

+		ibuf = fs->win; szb = 1;	/* Use window buffer (many single-sector writes may take a time) */

+		for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ;	/* Fill the cluster with 0 */

+	}

+	return (n == fs->csize) ? FR_OK : FR_DISK_ERR;

+}

+#endif	/* !FF_FS_READONLY */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Set directory index                              */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT dir_sdi (	/* FR_OK(0):succeeded, !=0:error */

+	DIR* dp,		/* Pointer to directory object */

+	DWORD ofs		/* Offset of directory table */

+)

+{

+	DWORD csz, clst;

+	FATFS *fs = dp->obj.fs;

+

+

+	if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) {	/* Check range of offset and alignment */

+		return FR_INT_ERR;

+	}

+	dp->dptr = ofs;				/* Set current offset */

+	clst = dp->obj.sclust;		/* Table start cluster (0:root) */

+	if (clst == 0 && fs->fs_type >= FS_FAT32) {	/* Replace cluster# 0 with root cluster# */

+		clst = (DWORD)fs->dirbase;

+		if (FF_FS_EXFAT) dp->obj.stat = 0;	/* exFAT: Root dir has an FAT chain */

+	}

+

+	if (clst == 0) {	/* Static table (root-directory on the FAT volume) */

+		if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR;	/* Is index out of range? */

+		dp->sect = fs->dirbase;

+

+	} else {			/* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */

+		csz = (DWORD)fs->csize * SS(fs);	/* Bytes per cluster */

+		while (ofs >= csz) {				/* Follow cluster chain */

+			clst = get_fat(&dp->obj, clst);				/* Get next cluster */

+			if (clst == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error */

+			if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR;	/* Reached to end of table or internal error */

+			ofs -= csz;

+		}

+		dp->sect = clst2sect(fs, clst);

+	}

+	dp->clust = clst;					/* Current cluster# */

+	if (dp->sect == 0) return FR_INT_ERR;

+	dp->sect += ofs / SS(fs);			/* Sector# of the directory entry */

+	dp->dir = fs->win + (ofs % SS(fs));	/* Pointer to the entry in the win[] */

+

+	return FR_OK;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Move directory table index next                  */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT dir_next (	/* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */

+	DIR* dp,				/* Pointer to the directory object */

+	int stretch				/* 0: Do not stretch table, 1: Stretch table if needed */

+)

+{

+	DWORD ofs, clst;

+	FATFS *fs = dp->obj.fs;

+

+

+	ofs = dp->dptr + SZDIRE;	/* Next entry */

+	if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) dp->sect = 0;	/* Disable it if the offset reached the max value */

+	if (dp->sect == 0) return FR_NO_FILE;	/* Report EOT if it has been disabled */

+

+	if (ofs % SS(fs) == 0) {	/* Sector changed? */

+		dp->sect++;				/* Next sector */

+

+		if (dp->clust == 0) {	/* Static table */

+			if (ofs / SZDIRE >= fs->n_rootdir) {	/* Report EOT if it reached end of static table */

+				dp->sect = 0; return FR_NO_FILE;

+			}

+		}

+		else {					/* Dynamic table */

+			if ((ofs / SS(fs) & (fs->csize - 1)) == 0) {	/* Cluster changed? */

+				clst = get_fat(&dp->obj, dp->clust);		/* Get next cluster */

+				if (clst <= 1) return FR_INT_ERR;			/* Internal error */

+				if (clst == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error */

+				if (clst >= fs->n_fatent) {					/* It reached end of dynamic table */

+#if !FF_FS_READONLY

+					if (!stretch) {								/* If no stretch, report EOT */

+						dp->sect = 0; return FR_NO_FILE;

+					}

+					clst = create_chain(&dp->obj, dp->clust);	/* Allocate a cluster */

+					if (clst == 0) return FR_DENIED;			/* No free cluster */

+					if (clst == 1) return FR_INT_ERR;			/* Internal error */

+					if (clst == 0xFFFFFFFF) return FR_DISK_ERR;	/* Disk error */

+					if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR;	/* Clean up the stretched table */

+					if (FF_FS_EXFAT) dp->obj.stat |= 4;			/* exFAT: The directory has been stretched */

+#else

+					if (!stretch) dp->sect = 0;					/* (this line is to suppress compiler warning) */

+					dp->sect = 0; return FR_NO_FILE;			/* Report EOT */

+#endif

+				}

+				dp->clust = clst;		/* Initialize data for new cluster */

+				dp->sect = clst2sect(fs, clst);

+			}

+		}

+	}

+	dp->dptr = ofs;						/* Current entry */

+	dp->dir = fs->win + ofs % SS(fs);	/* Pointer to the entry in the win[] */

+

+	return FR_OK;

+}

+

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Reserve a block of directory entries             */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT dir_alloc (	/* FR_OK(0):succeeded, !=0:error */

+	DIR* dp,				/* Pointer to the directory object */

+	UINT n_ent				/* Number of contiguous entries to allocate */

+)

+{

+	FRESULT res;

+	UINT n;

+	FATFS *fs = dp->obj.fs;

+

+

+	res = dir_sdi(dp, 0);

+	if (res == FR_OK) {

+		n = 0;

+		do {

+			res = move_window(fs, dp->sect);

+			if (res != FR_OK) break;

+#if FF_FS_EXFAT

+			if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {	/* Is the entry free? */

+#else

+			if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {	/* Is the entry free? */

+#endif

+				if (++n == n_ent) break;	/* Is a block of contiguous free entries found? */

+			} else {

+				n = 0;				/* Not a free entry, restart to search */

+			}

+			res = dir_next(dp, 1);	/* Next entry with table stretch enabled */

+		} while (res == FR_OK);

+	}

+

+	if (res == FR_NO_FILE) res = FR_DENIED;	/* No directory entry to allocate */

+	return res;

+}

+

+#endif	/* !FF_FS_READONLY */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* FAT: Directory handling - Load/Store start cluster number             */

+/*-----------------------------------------------------------------------*/

+

+static DWORD ld_clust (	/* Returns the top cluster value of the SFN entry */

+	FATFS* fs,			/* Pointer to the fs object */

+	const BYTE* dir		/* Pointer to the key entry */

+)

+{

+	DWORD cl;

+

+	cl = ld_word(dir + DIR_FstClusLO);

+	if (fs->fs_type == FS_FAT32) {

+		cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;

+	}

+

+	return cl;

+}

+

+

+#if !FF_FS_READONLY

+static void st_clust (

+	FATFS* fs,	/* Pointer to the fs object */

+	BYTE* dir,	/* Pointer to the key entry */

+	DWORD cl	/* Value to be set */

+)

+{

+	st_word(dir + DIR_FstClusLO, (WORD)cl);

+	if (fs->fs_type == FS_FAT32) {

+		st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));

+	}

+}

+#endif

+

+

+

+#if FF_USE_LFN

+/*--------------------------------------------------------*/

+/* FAT-LFN: Compare a part of file name with an LFN entry */

+/*--------------------------------------------------------*/

+

+static int cmp_lfn (		/* 1:matched, 0:not matched */

+	const WCHAR* lfnbuf,	/* Pointer to the LFN working buffer to be compared */

+	BYTE* dir				/* Pointer to the directory entry containing the part of LFN */

+)

+{

+	UINT i, s;

+	WCHAR wc, uc;

+

+

+	if (ld_word(dir + LDIR_FstClusLO) != 0) return 0;	/* Check LDIR_FstClusLO */

+

+	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;	/* Offset in the LFN buffer */

+

+	for (wc = 1, s = 0; s < 13; s++) {		/* Process all characters in the entry */

+		uc = ld_word(dir + LfnOfs[s]);		/* Pick an LFN character */

+		if (wc != 0) {

+			if (i >= FF_MAX_LFN + 1 || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) {	/* Compare it */

+				return 0;					/* Not matched */

+			}

+			wc = uc;

+		} else {

+			if (uc != 0xFFFF) return 0;		/* Check filler */

+		}

+	}

+

+	if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0;	/* Last segment matched but different length */

+

+	return 1;		/* The part of LFN matched */

+}

+

+

+#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT

+/*-----------------------------------------------------*/

+/* FAT-LFN: Pick a part of file name from an LFN entry */

+/*-----------------------------------------------------*/

+

+static int pick_lfn (	/* 1:succeeded, 0:buffer overflow or invalid LFN entry */

+	WCHAR* lfnbuf,		/* Pointer to the LFN working buffer */

+	BYTE* dir			/* Pointer to the LFN entry */

+)

+{

+	UINT i, s;

+	WCHAR wc, uc;

+

+

+	if (ld_word(dir + LDIR_FstClusLO) != 0) return 0;	/* Check LDIR_FstClusLO is 0 */

+

+	i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13;	/* Offset in the LFN buffer */

+

+	for (wc = 1, s = 0; s < 13; s++) {		/* Process all characters in the entry */

+		uc = ld_word(dir + LfnOfs[s]);		/* Pick an LFN character */

+		if (wc != 0) {

+			if (i >= FF_MAX_LFN + 1) return 0;	/* Buffer overflow? */

+			lfnbuf[i++] = wc = uc;			/* Store it */

+		} else {

+			if (uc != 0xFFFF) return 0;		/* Check filler */

+		}

+	}

+

+	if (dir[LDIR_Ord] & LLEF && wc != 0) {	/* Put terminator if it is the last LFN part and not terminated */

+		if (i >= FF_MAX_LFN + 1) return 0;	/* Buffer overflow? */

+		lfnbuf[i] = 0;

+	}

+

+	return 1;		/* The part of LFN is valid */

+}

+#endif

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------*/

+/* FAT-LFN: Create an entry of LFN entries */

+/*-----------------------------------------*/

+

+static void put_lfn (

+	const WCHAR* lfn,	/* Pointer to the LFN */

+	BYTE* dir,			/* Pointer to the LFN entry to be created */

+	BYTE ord,			/* LFN order (1-20) */

+	BYTE sum			/* Checksum of the corresponding SFN */

+)

+{

+	UINT i, s;

+	WCHAR wc;

+

+

+	dir[LDIR_Chksum] = sum;			/* Set checksum */

+	dir[LDIR_Attr] = AM_LFN;		/* Set attribute. LFN entry */

+	dir[LDIR_Type] = 0;

+	st_word(dir + LDIR_FstClusLO, 0);

+

+	i = (ord - 1) * 13;				/* Get offset in the LFN working buffer */

+	s = wc = 0;

+	do {

+		if (wc != 0xFFFF) wc = lfn[i++];	/* Get an effective character */

+		st_word(dir + LfnOfs[s], wc);		/* Put it */

+		if (wc == 0) wc = 0xFFFF;			/* Padding characters for following items */

+	} while (++s < 13);

+	if (wc == 0xFFFF || !lfn[i]) ord |= LLEF;	/* Last LFN part is the start of LFN sequence */

+	dir[LDIR_Ord] = ord;			/* Set the LFN order */

+}

+

+#endif	/* !FF_FS_READONLY */

+#endif	/* FF_USE_LFN */

+

+

+

+#if FF_USE_LFN && !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* FAT-LFN: Create a Numbered SFN                                        */

+/*-----------------------------------------------------------------------*/

+

+static void gen_numname (

+	BYTE* dst,			/* Pointer to the buffer to store numbered SFN */

+	const BYTE* src,	/* Pointer to SFN in directory form */

+	const WCHAR* lfn,	/* Pointer to LFN */

+	UINT seq			/* Sequence number */

+)

+{

+	BYTE ns[8], c;

+	UINT i, j;

+	WCHAR wc;

+	DWORD sreg;

+

+

+	memcpy(dst, src, 11);	/* Prepare the SFN to be modified */

+

+	if (seq > 5) {	/* In case of many collisions, generate a hash number instead of sequential number */

+		sreg = seq;

+		while (*lfn) {	/* Create a CRC as hash value */

+			wc = *lfn++;

+			for (i = 0; i < 16; i++) {

+				sreg = (sreg << 1) + (wc & 1);

+				wc >>= 1;

+				if (sreg & 0x10000) sreg ^= 0x11021;

+			}

+		}

+		seq = (UINT)sreg;

+	}

+

+	/* Make suffix (~ + hexdecimal) */

+	i = 7;

+	do {

+		c = (BYTE)((seq % 16) + '0'); seq /= 16;

+		if (c > '9') c += 7;

+		ns[i--] = c;

+	} while (i && seq);

+	ns[i] = '~';

+

+	/* Append the suffix to the SFN body */

+	for (j = 0; j < i && dst[j] != ' '; j++) {	/* Find the offset to append */

+		if (dbc_1st(dst[j])) {	/* To avoid DBC break up */

+			if (j == i - 1) break;

+			j++;

+		}

+	}

+	do {	/* Append the suffix */

+		dst[j++] = (i < 8) ? ns[i++] : ' ';

+	} while (j < 8);

+}

+#endif	/* FF_USE_LFN && !FF_FS_READONLY */

+

+

+

+#if FF_USE_LFN

+/*-----------------------------------------------------------------------*/

+/* FAT-LFN: Calculate checksum of an SFN entry                           */

+/*-----------------------------------------------------------------------*/

+

+static BYTE sum_sfn (

+	const BYTE* dir		/* Pointer to the SFN entry */

+)

+{

+	BYTE sum = 0;

+	UINT n = 11;

+

+	do {

+		sum = (sum >> 1) + (sum << 7) + *dir++;

+	} while (--n);

+	return sum;

+}

+

+#endif	/* FF_USE_LFN */

+

+

+

+#if FF_FS_EXFAT

+/*-----------------------------------------------------------------------*/

+/* exFAT: Checksum                                                       */

+/*-----------------------------------------------------------------------*/

+

+static WORD xdir_sum (	/* Get checksum of the directoly entry block */

+	const BYTE* dir		/* Directory entry block to be calculated */

+)

+{

+	UINT i, szblk;

+	WORD sum;

+

+

+	szblk = (dir[XDIR_NumSec] + 1) * SZDIRE;	/* Number of bytes of the entry block */

+	for (i = sum = 0; i < szblk; i++) {

+		if (i == XDIR_SetSum) {	/* Skip 2-byte sum field */

+			i++;

+		} else {

+			sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];

+		}

+	}

+	return sum;

+}

+

+

+

+static WORD xname_sum (	/* Get check sum (to be used as hash) of the file name */

+	const WCHAR* name	/* File name to be calculated */

+)

+{

+	WCHAR chr;

+	WORD sum = 0;

+

+

+	while ((chr = *name++) != 0) {

+		chr = (WCHAR)ff_wtoupper(chr);		/* File name needs to be up-case converted */

+		sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);

+		sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);

+	}

+	return sum;

+}

+

+

+#if !FF_FS_READONLY && FF_USE_MKFS

+static DWORD xsum32 (	/* Returns 32-bit checksum */

+	BYTE  dat,			/* Byte to be calculated (byte-by-byte processing) */

+	DWORD sum			/* Previous sum value */

+)

+{

+	sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;

+	return sum;

+}

+#endif

+

+

+

+/*-----------------------------------*/

+/* exFAT: Get a directry entry block */

+/*-----------------------------------*/

+

+static FRESULT load_xdir (	/* FR_INT_ERR: invalid entry block */

+	DIR* dp					/* Reading direcotry object pointing top of the entry block to load */

+)

+{

+	FRESULT res;

+	UINT i, sz_ent;

+	BYTE *dirb = dp->obj.fs->dirbuf;	/* Pointer to the on-memory direcotry entry block 85+C0+C1s */

+

+

+	/* Load file directory entry */

+	res = move_window(dp->obj.fs, dp->sect);

+	if (res != FR_OK) return res;

+	if (dp->dir[XDIR_Type] != ET_FILEDIR) return FR_INT_ERR;	/* Invalid order */

+	memcpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE);

+	sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE;

+	if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR;

+

+	/* Load stream extension entry */

+	res = dir_next(dp, 0);

+	if (res == FR_NO_FILE) res = FR_INT_ERR;	/* It cannot be */

+	if (res != FR_OK) return res;

+	res = move_window(dp->obj.fs, dp->sect);

+	if (res != FR_OK) return res;

+	if (dp->dir[XDIR_Type] != ET_STREAM) return FR_INT_ERR;	/* Invalid order */

+	memcpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE);

+	if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR;

+

+	/* Load file name entries */

+	i = 2 * SZDIRE;	/* Name offset to load */

+	do {

+		res = dir_next(dp, 0);

+		if (res == FR_NO_FILE) res = FR_INT_ERR;	/* It cannot be */

+		if (res != FR_OK) return res;

+		res = move_window(dp->obj.fs, dp->sect);

+		if (res != FR_OK) return res;

+		if (dp->dir[XDIR_Type] != ET_FILENAME) return FR_INT_ERR;	/* Invalid order */

+		if (i < MAXDIRB(FF_MAX_LFN)) memcpy(dirb + i, dp->dir, SZDIRE);

+	} while ((i += SZDIRE) < sz_ent);

+

+	/* Sanity check (do it for only accessible object) */

+	if (i <= MAXDIRB(FF_MAX_LFN)) {

+		if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;

+	}

+	return FR_OK;

+}

+

+

+/*------------------------------------------------------------------*/

+/* exFAT: Initialize object allocation info with loaded entry block */

+/*------------------------------------------------------------------*/

+

+static void init_alloc_info (

+	FATFS* fs,		/* Filesystem object */

+	FFOBJID* obj	/* Object allocation information to be initialized */

+)

+{

+	obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus);		/* Start cluster */

+	obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);	/* Size */

+	obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;				/* Allocation status */

+	obj->n_frag = 0;										/* No last fragment info */

+}

+

+

+

+#if !FF_FS_READONLY || FF_FS_RPATH != 0

+/*------------------------------------------------*/

+/* exFAT: Load the object's directory entry block */

+/*------------------------------------------------*/

+

+static FRESULT load_obj_xdir (

+	DIR* dp,			/* Blank directory object to be used to access containing direcotry */

+	const FFOBJID* obj	/* Object with its containing directory information */

+)

+{

+	FRESULT res;

+

+	/* Open object containing directory */

+	dp->obj.fs = obj->fs;

+	dp->obj.sclust = obj->c_scl;

+	dp->obj.stat = (BYTE)obj->c_size;

+	dp->obj.objsize = obj->c_size & 0xFFFFFF00;

+	dp->obj.n_frag = 0;

+	dp->blk_ofs = obj->c_ofs;

+

+	res = dir_sdi(dp, dp->blk_ofs);	/* Goto object's entry block */

+	if (res == FR_OK) {

+		res = load_xdir(dp);		/* Load the object's entry block */

+	}

+	return res;

+}

+#endif

+

+

+#if !FF_FS_READONLY

+/*----------------------------------------*/

+/* exFAT: Store the directory entry block */

+/*----------------------------------------*/

+

+static FRESULT store_xdir (

+	DIR* dp				/* Pointer to the direcotry object */

+)

+{

+	FRESULT res;

+	UINT nent;

+	BYTE *dirb = dp->obj.fs->dirbuf;	/* Pointer to the direcotry entry block 85+C0+C1s */

+

+	/* Create set sum */

+	st_word(dirb + XDIR_SetSum, xdir_sum(dirb));

+	nent = dirb[XDIR_NumSec] + 1;

+

+	/* Store the direcotry entry block to the directory */

+	res = dir_sdi(dp, dp->blk_ofs);

+	while (res == FR_OK) {

+		res = move_window(dp->obj.fs, dp->sect);

+		if (res != FR_OK) break;

+		memcpy(dp->dir, dirb, SZDIRE);

+		dp->obj.fs->wflag = 1;

+		if (--nent == 0) break;

+		dirb += SZDIRE;

+		res = dir_next(dp, 0);

+	}

+	return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;

+}

+

+

+

+/*-------------------------------------------*/

+/* exFAT: Create a new directory enrty block */

+/*-------------------------------------------*/

+

+static void create_xdir (

+	BYTE* dirb,			/* Pointer to the direcotry entry block buffer */

+	const WCHAR* lfn	/* Pointer to the object name */

+)

+{

+	UINT i;

+	BYTE nc1, nlen;

+	WCHAR wc;

+

+

+	/* Create file-directory and stream-extension entry */

+	memset(dirb, 0, 2 * SZDIRE);

+	dirb[0 * SZDIRE + XDIR_Type] = ET_FILEDIR;

+	dirb[1 * SZDIRE + XDIR_Type] = ET_STREAM;

+

+	/* Create file-name entries */

+	i = SZDIRE * 2;	/* Top of file_name entries */

+	nlen = nc1 = 0; wc = 1;

+	do {

+		dirb[i++] = ET_FILENAME; dirb[i++] = 0;

+		do {	/* Fill name field */

+			if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++;	/* Get a character if exist */

+			st_word(dirb + i, wc); 	/* Store it */

+			i += 2;

+		} while (i % SZDIRE != 0);

+		nc1++;

+	} while (lfn[nlen]);	/* Fill next entry if any char follows */

+

+	dirb[XDIR_NumName] = nlen;		/* Set name length */

+	dirb[XDIR_NumSec] = 1 + nc1;	/* Set secondary count (C0 + C1s) */

+	st_word(dirb + XDIR_NameHash, xname_sum(lfn));	/* Set name hash */

+}

+

+#endif	/* !FF_FS_READONLY */

+#endif	/* FF_FS_EXFAT */

+

+

+

+#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT

+/*-----------------------------------------------------------------------*/

+/* Read an object from the directory                                     */

+/*-----------------------------------------------------------------------*/

+

+#define DIR_READ_FILE(dp) dir_read(dp, 0)

+#define DIR_READ_LABEL(dp) dir_read(dp, 1)

+

+static FRESULT dir_read (

+	DIR* dp,		/* Pointer to the directory object */

+	int vol			/* Filtered by 0:file/directory or 1:volume label */

+)

+{

+	FRESULT res = FR_NO_FILE;

+	FATFS *fs = dp->obj.fs;

+	BYTE attr, b;

+#if FF_USE_LFN

+	BYTE ord = 0xFF, sum = 0xFF;

+#endif

+

+	while (dp->sect) {

+		res = move_window(fs, dp->sect);

+		if (res != FR_OK) break;

+		b = dp->dir[DIR_Name];	/* Test for the entry type */

+		if (b == 0) {

+			res = FR_NO_FILE; break; /* Reached to end of the directory */

+		}

+#if FF_FS_EXFAT

+		if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+			if (FF_USE_LABEL && vol) {

+				if (b == ET_VLABEL) break;	/* Volume label entry? */

+			} else {

+				if (b == ET_FILEDIR) {		/* Start of the file entry block? */

+					dp->blk_ofs = dp->dptr;	/* Get location of the block */

+					res = load_xdir(dp);	/* Load the entry block */

+					if (res == FR_OK) {

+						dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK;	/* Get attribute */

+					}

+					break;

+				}

+			}

+		} else

+#endif

+		{	/* On the FAT/FAT32 volume */

+			dp->obj.attr = attr = dp->dir[DIR_Attr] & AM_MASK;	/* Get attribute */

+#if FF_USE_LFN		/* LFN configuration */

+			if (b == DDEM || b == '.' || (int)((attr & ~AM_ARC) == AM_VOL) != vol) {	/* An entry without valid data */

+				ord = 0xFF;

+			} else {

+				if (attr == AM_LFN) {	/* An LFN entry is found */

+					if (b & LLEF) {		/* Is it start of an LFN sequence? */

+						sum = dp->dir[LDIR_Chksum];

+						b &= (BYTE)~LLEF; ord = b;

+						dp->blk_ofs = dp->dptr;

+					}

+					/* Check LFN validity and capture it */

+					ord = (b == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;

+				} else {				/* An SFN entry is found */

+					if (ord != 0 || sum != sum_sfn(dp->dir)) {	/* Is there a valid LFN? */

+						dp->blk_ofs = 0xFFFFFFFF;	/* It has no LFN. */

+					}

+					break;

+				}

+			}

+#else		/* Non LFN configuration */

+			if (b != DDEM && b != '.' && attr != AM_LFN && (int)((attr & ~AM_ARC) == AM_VOL) == vol) {	/* Is it a valid entry? */

+				break;

+			}

+#endif

+		}

+		res = dir_next(dp, 0);		/* Next entry */

+		if (res != FR_OK) break;

+	}

+

+	if (res != FR_OK) dp->sect = 0;		/* Terminate the read operation on error or EOT */

+	return res;

+}

+

+#endif	/* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Directory handling - Find an object in the directory                  */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT dir_find (	/* FR_OK(0):succeeded, !=0:error */

+	DIR* dp					/* Pointer to the directory object with the file name */

+)

+{

+	FRESULT res;

+	FATFS *fs = dp->obj.fs;

+	BYTE c;

+#if FF_USE_LFN

+	BYTE a, ord, sum;

+#endif

+

+	res = dir_sdi(dp, 0);			/* Rewind directory object */

+	if (res != FR_OK) return res;

+#if FF_FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		BYTE nc;

+		UINT di, ni;

+		WORD hash = xname_sum(fs->lfnbuf);		/* Hash value of the name to find */

+

+		while ((res = DIR_READ_FILE(dp)) == FR_OK) {	/* Read an item */

+#if FF_MAX_LFN < 255

+			if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue;		/* Skip comparison if inaccessible object name */

+#endif

+			if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue;	/* Skip comparison if hash mismatched */

+			for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) {	/* Compare the name */

+				if ((di % SZDIRE) == 0) di += 2;

+				if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;

+			}

+			if (nc == 0 && !fs->lfnbuf[ni]) break;	/* Name matched? */

+		}

+		return res;

+	}

+#endif

+	/* On the FAT/FAT32 volume */

+#if FF_USE_LFN

+	ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF;	/* Reset LFN sequence */

+#endif

+	do {

+		res = move_window(fs, dp->sect);

+		if (res != FR_OK) break;

+		c = dp->dir[DIR_Name];

+		if (c == 0) { res = FR_NO_FILE; break; }	/* Reached to end of table */

+#if FF_USE_LFN		/* LFN configuration */

+		dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;

+		if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) {	/* An entry without valid data */

+			ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF;	/* Reset LFN sequence */

+		} else {

+			if (a == AM_LFN) {			/* An LFN entry is found */

+				if (!(dp->fn[NSFLAG] & NS_NOLFN)) {

+					if (c & LLEF) {		/* Is it start of LFN sequence? */

+						sum = dp->dir[LDIR_Chksum];

+						c &= (BYTE)~LLEF; ord = c;	/* LFN start order */

+						dp->blk_ofs = dp->dptr;	/* Start offset of LFN */

+					}

+					/* Check validity of the LFN entry and compare it with given name */

+					ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;

+				}

+			} else {					/* An SFN entry is found */

+				if (ord == 0 && sum == sum_sfn(dp->dir)) break;	/* LFN matched? */

+				if (!(dp->fn[NSFLAG] & NS_LOSS) && !memcmp(dp->dir, dp->fn, 11)) break;	/* SFN matched? */

+				ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF;	/* Reset LFN sequence */

+			}

+		}

+#else		/* Non LFN configuration */

+		dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;

+		if (!(dp->dir[DIR_Attr] & AM_VOL) && !memcmp(dp->dir, dp->fn, 11)) break;	/* Is it a valid entry? */

+#endif

+		res = dir_next(dp, 0);	/* Next entry */

+	} while (res == FR_OK);

+

+	return res;

+}

+

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Register an object to the directory                                   */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT dir_register (	/* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */

+	DIR* dp						/* Target directory with object name to be created */

+)

+{

+	FRESULT res;

+	FATFS *fs = dp->obj.fs;

+#if FF_USE_LFN		/* LFN configuration */

+	UINT n, len, n_ent;

+	BYTE sn[12], sum;

+

+

+	if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME;	/* Check name validity */

+	for (len = 0; fs->lfnbuf[len]; len++) ;	/* Get lfn length */

+

+#if FF_FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		n_ent = (len + 14) / 15 + 2;	/* Number of entries to allocate (85+C0+C1s) */

+		res = dir_alloc(dp, n_ent);		/* Allocate directory entries */

+		if (res != FR_OK) return res;

+		dp->blk_ofs = dp->dptr - SZDIRE * (n_ent - 1);	/* Set the allocated entry block offset */

+

+		if (dp->obj.stat & 4) {			/* Has the directory been stretched by new allocation? */

+			dp->obj.stat &= ~4;

+			res = fill_first_frag(&dp->obj);	/* Fill the first fragment on the FAT if needed */

+			if (res != FR_OK) return res;

+			res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF);	/* Fill the last fragment on the FAT if needed */

+			if (res != FR_OK) return res;

+			if (dp->obj.sclust != 0) {		/* Is it a sub-directory? */

+				DIR dj;

+

+				res = load_obj_xdir(&dj, &dp->obj);	/* Load the object status */

+				if (res != FR_OK) return res;

+				dp->obj.objsize += (DWORD)fs->csize * SS(fs);		/* Increase the directory size by cluster size */

+				st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize);

+				st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);

+				fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1;		/* Update the allocation status */

+				res = store_xdir(&dj);				/* Store the object status */

+				if (res != FR_OK) return res;

+			}

+		}

+

+		create_xdir(fs->dirbuf, fs->lfnbuf);	/* Create on-memory directory block to be written later */

+		return FR_OK;

+	}

+#endif

+	/* On the FAT/FAT32 volume */

+	memcpy(sn, dp->fn, 12);

+	if (sn[NSFLAG] & NS_LOSS) {			/* When LFN is out of 8.3 format, generate a numbered name */

+		dp->fn[NSFLAG] = NS_NOLFN;		/* Find only SFN */

+		for (n = 1; n < 100; n++) {

+			gen_numname(dp->fn, sn, fs->lfnbuf, n);	/* Generate a numbered name */

+			res = dir_find(dp);				/* Check if the name collides with existing SFN */

+			if (res != FR_OK) break;

+		}

+		if (n == 100) return FR_DENIED;		/* Abort if too many collisions */

+		if (res != FR_NO_FILE) return res;	/* Abort if the result is other than 'not collided' */

+		dp->fn[NSFLAG] = sn[NSFLAG];

+	}

+

+	/* Create an SFN with/without LFNs. */

+	n_ent = (sn[NSFLAG] & NS_LFN) ? (len + 12) / 13 + 1 : 1;	/* Number of entries to allocate */

+	res = dir_alloc(dp, n_ent);		/* Allocate entries */

+	if (res == FR_OK && --n_ent) {	/* Set LFN entry if needed */

+		res = dir_sdi(dp, dp->dptr - n_ent * SZDIRE);

+		if (res == FR_OK) {

+			sum = sum_sfn(dp->fn);	/* Checksum value of the SFN tied to the LFN */

+			do {					/* Store LFN entries in bottom first */

+				res = move_window(fs, dp->sect);

+				if (res != FR_OK) break;

+				put_lfn(fs->lfnbuf, dp->dir, (BYTE)n_ent, sum);

+				fs->wflag = 1;

+				res = dir_next(dp, 0);	/* Next entry */

+			} while (res == FR_OK && --n_ent);

+		}

+	}

+

+#else	/* Non LFN configuration */

+	res = dir_alloc(dp, 1);		/* Allocate an entry for SFN */

+

+#endif

+

+	/* Set SFN entry */

+	if (res == FR_OK) {

+		res = move_window(fs, dp->sect);

+		if (res == FR_OK) {

+			memset(dp->dir, 0, SZDIRE);	/* Clean the entry */

+			memcpy(dp->dir + DIR_Name, dp->fn, 11);	/* Put SFN */

+#if FF_USE_LFN

+			dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT);	/* Put NT flag */

+#endif

+			fs->wflag = 1;

+		}

+	}

+

+	return res;

+}

+

+#endif /* !FF_FS_READONLY */

+

+

+

+#if !FF_FS_READONLY && FF_FS_MINIMIZE == 0

+/*-----------------------------------------------------------------------*/

+/* Remove an object from the directory                                   */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT dir_remove (	/* FR_OK:Succeeded, FR_DISK_ERR:A disk error */

+	DIR* dp					/* Directory object pointing the entry to be removed */

+)

+{

+	FRESULT res;

+	FATFS *fs = dp->obj.fs;

+#if FF_USE_LFN		/* LFN configuration */

+	DWORD last = dp->dptr;

+

+	res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs);	/* Goto top of the entry block if LFN is exist */

+	if (res == FR_OK) {

+		do {

+			res = move_window(fs, dp->sect);

+			if (res != FR_OK) break;

+			if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+				dp->dir[XDIR_Type] &= 0x7F;	/* Clear the entry InUse flag. */

+			} else {										/* On the FAT/FAT32 volume */

+				dp->dir[DIR_Name] = DDEM;	/* Mark the entry 'deleted'. */

+			}

+			fs->wflag = 1;

+			if (dp->dptr >= last) break;	/* If reached last entry then all entries of the object has been deleted. */

+			res = dir_next(dp, 0);	/* Next entry */

+		} while (res == FR_OK);

+		if (res == FR_NO_FILE) res = FR_INT_ERR;

+	}

+#else			/* Non LFN configuration */

+

+	res = move_window(fs, dp->sect);

+	if (res == FR_OK) {

+		dp->dir[DIR_Name] = DDEM;	/* Mark the entry 'deleted'.*/

+		fs->wflag = 1;

+	}

+#endif

+

+	return res;

+}

+

+#endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */

+

+

+

+#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2

+/*-----------------------------------------------------------------------*/

+/* Get file information from directory entry                             */

+/*-----------------------------------------------------------------------*/

+

+static void get_fileinfo (

+	DIR* dp,			/* Pointer to the directory object */

+	FILINFO* fno		/* Pointer to the file information to be filled */

+)

+{

+	UINT si, di;

+#if FF_USE_LFN

+	BYTE lcf;

+	WCHAR wc, hs;

+	FATFS *fs = dp->obj.fs;

+	UINT nw;

+#else

+	TCHAR c;

+#endif

+

+

+	fno->fname[0] = 0;			/* Invaidate file info */

+	if (dp->sect == 0) return;	/* Exit if read pointer has reached end of directory */

+

+#if FF_USE_LFN		/* LFN configuration */

+#if FF_FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* exFAT volume */

+		UINT nc = 0;

+

+		si = SZDIRE * 2; di = 0;	/* 1st C1 entry in the entry block */

+		hs = 0;

+		while (nc < fs->dirbuf[XDIR_NumName]) {

+			if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; }	/* Truncated directory block? */

+			if ((si % SZDIRE) == 0) si += 2;		/* Skip entry type field */

+			wc = ld_word(fs->dirbuf + si); si += 2; nc++;	/* Get a character */

+			if (hs == 0 && IsSurrogate(wc)) {		/* Is it a surrogate? */

+				hs = wc; continue;					/* Get low surrogate */

+			}

+			nw = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di);	/* Store it in API encoding */

+			if (nw == 0) { di = 0; break; }			/* Buffer overflow or wrong char? */

+			di += nw;

+			hs = 0;

+		}

+		if (hs != 0) di = 0;					/* Broken surrogate pair? */

+		if (di == 0) fno->fname[di++] = '?';	/* Inaccessible object name? */

+		fno->fname[di] = 0;						/* Terminate the name */

+		fno->altname[0] = 0;					/* exFAT does not support SFN */

+

+		fno->fattrib = fs->dirbuf[XDIR_Attr] & AM_MASKX;		/* Attribute */

+		fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(fs->dirbuf + XDIR_FileSize);	/* Size */

+		fno->ftime = ld_word(fs->dirbuf + XDIR_ModTime + 0);	/* Time */

+		fno->fdate = ld_word(fs->dirbuf + XDIR_ModTime + 2);	/* Date */

+		return;

+	} else

+#endif

+	{	/* FAT/FAT32 volume */

+		if (dp->blk_ofs != 0xFFFFFFFF) {	/* Get LFN if available */

+			si = di = 0;

+			hs = 0;

+			while (fs->lfnbuf[si] != 0) {

+				wc = fs->lfnbuf[si++];		/* Get an LFN character (UTF-16) */

+				if (hs == 0 && IsSurrogate(wc)) {	/* Is it a surrogate? */

+					hs = wc; continue;		/* Get low surrogate */

+				}

+				nw = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di);	/* Store it in API encoding */

+				if (nw == 0) { di = 0; break; }	/* Buffer overflow or wrong char? */

+				di += nw;

+				hs = 0;

+			}

+			if (hs != 0) di = 0;	/* Broken surrogate pair? */

+			fno->fname[di] = 0;		/* Terminate the LFN (null string means LFN is invalid) */

+		}

+	}

+

+	si = di = 0;

+	while (si < 11) {		/* Get SFN from SFN entry */

+		wc = dp->dir[si++];			/* Get a char */

+		if (wc == ' ') continue;	/* Skip padding spaces */

+		if (wc == RDDEM) wc = DDEM;	/* Restore replaced DDEM character */

+		if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.';	/* Insert a . if extension is exist */

+#if FF_LFN_UNICODE >= 1	/* Unicode output */

+		if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) {	/* Make a DBC if needed */

+			wc = wc << 8 | dp->dir[si++];

+		}

+		wc = ff_oem2uni(wc, CODEPAGE);		/* ANSI/OEM -> Unicode */

+		if (wc == 0) { di = 0; break; }		/* Wrong char in the current code page? */

+		nw = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di);	/* Store it in API encoding */

+		if (nw == 0) { di = 0; break; }		/* Buffer overflow? */

+		di += nw;

+#else					/* ANSI/OEM output */

+		fno->altname[di++] = (TCHAR)wc;	/* Store it without any conversion */

+#endif

+	}

+	fno->altname[di] = 0;	/* Terminate the SFN  (null string means SFN is invalid) */

+

+	if (fno->fname[0] == 0) {	/* If LFN is invalid, altname[] needs to be copied to fname[] */

+		if (di == 0) {	/* If LFN and SFN both are invalid, this object is inaccesible */

+			fno->fname[di++] = '?';

+		} else {

+			for (si = di = 0, lcf = NS_BODY; fno->altname[si]; si++, di++) {	/* Copy altname[] to fname[] with case information */

+				wc = (WCHAR)fno->altname[si];

+				if (wc == '.') lcf = NS_EXT;

+				if (IsUpper(wc) && (dp->dir[DIR_NTres] & lcf)) wc += 0x20;

+				fno->fname[di] = (TCHAR)wc;

+			}

+		}

+		fno->fname[di] = 0;	/* Terminate the LFN */

+		if (!dp->dir[DIR_NTres]) fno->altname[0] = 0;	/* Altname is not needed if neither LFN nor case info is exist. */

+	}

+

+#else	/* Non-LFN configuration */

+	si = di = 0;

+	while (si < 11) {		/* Copy name body and extension */

+		c = (TCHAR)dp->dir[si++];

+		if (c == ' ') continue;		/* Skip padding spaces */

+		if (c == RDDEM) c = DDEM;	/* Restore replaced DDEM character */

+		if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */

+		fno->fname[di++] = c;

+	}

+	fno->fname[di] = 0;		/* Terminate the SFN */

+#endif

+

+	fno->fattrib = dp->dir[DIR_Attr] & AM_MASK;			/* Attribute */

+	fno->fsize = ld_dword(dp->dir + DIR_FileSize);		/* Size */

+	fno->ftime = ld_word(dp->dir + DIR_ModTime + 0);	/* Time */

+	fno->fdate = ld_word(dp->dir + DIR_ModTime + 2);	/* Date */

+}

+

+#endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */

+

+

+

+#if FF_USE_FIND && FF_FS_MINIMIZE <= 1

+/*-----------------------------------------------------------------------*/

+/* Pattern matching                                                      */

+/*-----------------------------------------------------------------------*/

+

+#define FIND_RECURS	4	/* Maximum number of wildcard terms in the pattern to limit recursion */

+

+

+static DWORD get_achar (	/* Get a character and advance ptr */

+	const TCHAR** ptr		/* Pointer to pointer to the ANSI/OEM or Unicode string */

+)

+{

+	DWORD chr;

+

+

+#if FF_USE_LFN && FF_LFN_UNICODE >= 1	/* Unicode input */

+	chr = tchar2uni(ptr);

+	if (chr == 0xFFFFFFFF) chr = 0;		/* Wrong UTF encoding is recognized as end of the string */

+	chr = ff_wtoupper(chr);

+

+#else									/* ANSI/OEM input */

+	chr = (BYTE)*(*ptr)++;				/* Get a byte */

+	if (IsLower(chr)) chr -= 0x20;		/* To upper ASCII char */

+#if FF_CODE_PAGE == 0

+	if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80];	/* To upper SBCS extended char */

+#elif FF_CODE_PAGE < 900

+	if (chr >= 0x80) chr = ExCvt[chr - 0x80];	/* To upper SBCS extended char */

+#endif

+#if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900

+	if (dbc_1st((BYTE)chr)) {	/* Get DBC 2nd byte if needed */

+		chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0;

+	}

+#endif

+

+#endif

+	return chr;

+}

+

+

+static int pattern_match (	/* 0:mismatched, 1:matched */

+	const TCHAR* pat,	/* Matching pattern */

+	const TCHAR* nam,	/* String to be tested */

+	UINT skip,			/* Number of pre-skip chars (number of ?s, b8:infinite (* specified)) */

+	UINT recur			/* Recursion count */

+)

+{

+	const TCHAR *pptr, *nptr;

+	DWORD pchr, nchr;

+	UINT sk;

+

+

+	while ((skip & 0xFF) != 0) {		/* Pre-skip name chars */

+		if (!get_achar(&nam)) return 0;	/* Branch mismatched if less name chars */

+		skip--;

+	}

+	if (*pat == 0 && skip) return 1;	/* Matched? (short circuit) */

+

+	do {

+		pptr = pat; nptr = nam;			/* Top of pattern and name to match */

+		for (;;) {

+			if (*pptr == '?' || *pptr == '*') {	/* Wildcard term? */

+				if (recur == 0) return 0;	/* Too many wildcard terms? */

+				sk = 0;

+				do {	/* Analyze the wildcard term */

+					if (*pptr++ == '?') sk++; else sk |= 0x100;

+				} while (*pptr == '?' || *pptr == '*');

+				if (pattern_match(pptr, nptr, sk, recur - 1)) return 1;	/* Test new branch (recursive call) */

+				nchr = *nptr; break;	/* Branch mismatched */

+			}

+			pchr = get_achar(&pptr);	/* Get a pattern char */

+			nchr = get_achar(&nptr);	/* Get a name char */

+			if (pchr != nchr) break;	/* Branch mismatched? */

+			if (pchr == 0) return 1;	/* Branch matched? (matched at end of both strings) */

+		}

+		get_achar(&nam);			/* nam++ */

+	} while (skip && nchr);		/* Retry until end of name if infinite search is specified */

+

+	return 0;

+}

+

+#endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Pick a top segment and create the object name in directory form       */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT create_name (	/* FR_OK: successful, FR_INVALID_NAME: could not create */

+	DIR* dp,					/* Pointer to the directory object */

+	const TCHAR** path			/* Pointer to pointer to the segment in the path string */

+)

+{

+#if FF_USE_LFN		/* LFN configuration */

+	BYTE b, cf;

+	WCHAR wc, *lfn;

+	DWORD uc;

+	UINT i, ni, si, di;

+	const TCHAR *p;

+

+

+	/* Create LFN into LFN working buffer */

+	p = *path; lfn = dp->obj.fs->lfnbuf; di = 0;

+	for (;;) {

+		uc = tchar2uni(&p);			/* Get a character */

+		if (uc == 0xFFFFFFFF) return FR_INVALID_NAME;		/* Invalid code or UTF decode error */

+		if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16);	/* Store high surrogate if needed */

+		wc = (WCHAR)uc;

+		if (wc < ' ' || IsSeparator(wc)) break;	/* Break if end of the path or a separator is found */

+		if (wc < 0x80 && strchr("*:<>|\"\?\x7F", (int)wc)) return FR_INVALID_NAME;	/* Reject illegal characters for LFN */

+		if (di >= FF_MAX_LFN) return FR_INVALID_NAME;	/* Reject too long name */

+		lfn[di++] = wc;				/* Store the Unicode character */

+	}

+	if (wc < ' ') {				/* Stopped at end of the path? */

+		cf = NS_LAST;			/* Last segment */

+	} else {					/* Stopped at a separator */

+		while (IsSeparator(*p)) p++;	/* Skip duplicated separators if exist */

+		cf = 0;					/* Next segment may follow */

+		if (IsTerminator(*p)) cf = NS_LAST;	/* Ignore terminating separator */

+	}

+	*path = p;					/* Return pointer to the next segment */

+

+#if FF_FS_RPATH != 0

+	if ((di == 1 && lfn[di - 1] == '.') ||

+		(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {	/* Is this segment a dot name? */

+		lfn[di] = 0;

+		for (i = 0; i < 11; i++) {	/* Create dot name for SFN entry */

+			dp->fn[i] = (i < di) ? '.' : ' ';

+		}

+		dp->fn[i] = cf | NS_DOT;	/* This is a dot entry */

+		return FR_OK;

+	}

+#endif

+	while (di) {					/* Snip off trailing spaces and dots if exist */

+		wc = lfn[di - 1];

+		if (wc != ' ' && wc != '.') break;

+		di--;

+	}

+	lfn[di] = 0;							/* LFN is created into the working buffer */

+	if (di == 0) return FR_INVALID_NAME;	/* Reject null name */

+

+	/* Create SFN in directory form */

+	for (si = 0; lfn[si] == ' '; si++) ;	/* Remove leading spaces */

+	if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN;	/* Is there any leading space or dot? */

+	while (di > 0 && lfn[di - 1] != '.') di--;	/* Find last dot (di<=si: no extension) */

+

+	memset(dp->fn, ' ', 11);

+	i = b = 0; ni = 8;

+	for (;;) {

+		wc = lfn[si++];					/* Get an LFN character */

+		if (wc == 0) break;				/* Break on end of the LFN */

+		if (wc == ' ' || (wc == '.' && si != di)) {	/* Remove embedded spaces and dots */

+			cf |= NS_LOSS | NS_LFN;

+			continue;

+		}

+

+		if (i >= ni || si == di) {		/* End of field? */

+			if (ni == 11) {				/* Name extension overflow? */

+				cf |= NS_LOSS | NS_LFN;

+				break;

+			}

+			if (si != di) cf |= NS_LOSS | NS_LFN;	/* Name body overflow? */

+			if (si > di) break;						/* No name extension? */

+			si = di; i = 8; ni = 11; b <<= 2;		/* Enter name extension */

+			continue;

+		}

+

+		if (wc >= 0x80) {	/* Is this an extended character? */

+			cf |= NS_LFN;	/* LFN entry needs to be created */

+#if FF_CODE_PAGE == 0

+			if (ExCvt) {	/* In SBCS cfg */

+				wc = ff_uni2oem(wc, CODEPAGE);			/* Unicode ==> ANSI/OEM code */

+				if (wc & 0x80) wc = ExCvt[wc & 0x7F];	/* Convert extended character to upper (SBCS) */

+			} else {		/* In DBCS cfg */

+				wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE);	/* Unicode ==> Up-convert ==> ANSI/OEM code */

+			}

+#elif FF_CODE_PAGE < 900	/* In SBCS cfg */

+			wc = ff_uni2oem(wc, CODEPAGE);			/* Unicode ==> ANSI/OEM code */

+			if (wc & 0x80) wc = ExCvt[wc & 0x7F];	/* Convert extended character to upper (SBCS) */

+#else						/* In DBCS cfg */

+			wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE);	/* Unicode ==> Up-convert ==> ANSI/OEM code */

+#endif

+		}

+

+		if (wc >= 0x100) {				/* Is this a DBC? */

+			if (i >= ni - 1) {			/* Field overflow? */

+				cf |= NS_LOSS | NS_LFN;

+				i = ni; continue;		/* Next field */

+			}

+			dp->fn[i++] = (BYTE)(wc >> 8);	/* Put 1st byte */

+		} else {						/* SBC */

+			if (wc == 0 || strchr("+,;=[]", (int)wc)) {	/* Replace illegal characters for SFN */

+				wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */

+			} else {

+				if (IsUpper(wc)) {		/* ASCII upper case? */

+					b |= 2;

+				}

+				if (IsLower(wc)) {		/* ASCII lower case? */

+					b |= 1; wc -= 0x20;

+				}

+			}

+		}

+		dp->fn[i++] = (BYTE)wc;

+	}

+

+	if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM;	/* If the first character collides with DDEM, replace it with RDDEM */

+

+	if (ni == 8) b <<= 2;				/* Shift capital flags if no extension */

+	if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN;	/* LFN entry needs to be created if composite capitals */

+	if (!(cf & NS_LFN)) {				/* When LFN is in 8.3 format without extended character, NT flags are created */

+		if (b & 0x01) cf |= NS_EXT;		/* NT flag (Extension has small capital letters only) */

+		if (b & 0x04) cf |= NS_BODY;	/* NT flag (Body has small capital letters only) */

+	}

+

+	dp->fn[NSFLAG] = cf;	/* SFN is created into dp->fn[] */

+

+	return FR_OK;

+

+

+#else	/* FF_USE_LFN : Non-LFN configuration */

+	BYTE c, d, *sfn;

+	UINT ni, si, i;

+	const char *p;

+

+	/* Create file name in directory form */

+	p = *path; sfn = dp->fn;

+	memset(sfn, ' ', 11);

+	si = i = 0; ni = 8;

+#if FF_FS_RPATH != 0

+	if (p[si] == '.') { /* Is this a dot entry? */

+		for (;;) {

+			c = (BYTE)p[si++];

+			if (c != '.' || si >= 3) break;

+			sfn[i++] = c;

+		}

+		if (!IsSeparator(c) && c > ' ') return FR_INVALID_NAME;

+		*path = p + si;					/* Return pointer to the next segment */

+		sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT;	/* Set last segment flag if end of the path */

+		return FR_OK;

+	}

+#endif

+	for (;;) {

+		c = (BYTE)p[si++];				/* Get a byte */

+		if (c <= ' ') break; 			/* Break if end of the path name */

+		if (IsSeparator(c)) {			/* Break if a separator is found */

+			while (IsSeparator(p[si])) si++;	/* Skip duplicated separator if exist */

+			break;

+		}

+		if (c == '.' || i >= ni) {		/* End of body or field overflow? */

+			if (ni == 11 || c != '.') return FR_INVALID_NAME;	/* Field overflow or invalid dot? */

+			i = 8; ni = 11;				/* Enter file extension field */

+			continue;

+		}

+#if FF_CODE_PAGE == 0

+		if (ExCvt && c >= 0x80) {		/* Is SBC extended character? */

+			c = ExCvt[c & 0x7F];		/* To upper SBC extended character */

+		}

+#elif FF_CODE_PAGE < 900

+		if (c >= 0x80) {				/* Is SBC extended character? */

+			c = ExCvt[c & 0x7F];		/* To upper SBC extended character */

+		}

+#endif

+		if (dbc_1st(c)) {				/* Check if it is a DBC 1st byte */

+			d = (BYTE)p[si++];			/* Get 2nd byte */

+			if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME;	/* Reject invalid DBC */

+			sfn[i++] = c;

+			sfn[i++] = d;

+		} else {						/* SBC */

+			if (strchr("*+,:;<=>[]|\"\?\x7F", (int)c)) return FR_INVALID_NAME;	/* Reject illegal chrs for SFN */

+			if (IsLower(c)) c -= 0x20;	/* To upper */

+			sfn[i++] = c;

+		}

+	}

+	*path = &p[si];						/* Return pointer to the next segment */

+	if (i == 0) return FR_INVALID_NAME;	/* Reject nul string */

+

+	if (sfn[0] == DDEM) sfn[0] = RDDEM;	/* If the first character collides with DDEM, replace it with RDDEM */

+	sfn[NSFLAG] = (c <= ' ' || p[si] <= ' ') ? NS_LAST : 0;	/* Set last segment flag if end of the path */

+

+	return FR_OK;

+#endif /* FF_USE_LFN */

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Follow a file path                                                    */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT follow_path (	/* FR_OK(0): successful, !=0: error code */

+	DIR* dp,					/* Directory object to return last directory and found object */

+	const TCHAR* path			/* Full-path string to find a file or directory */

+)

+{

+	FRESULT res;

+	BYTE ns;

+	FATFS *fs = dp->obj.fs;

+

+

+#if FF_FS_RPATH != 0

+	if (!IsSeparator(*path) && (FF_STR_VOLUME_ID != 2 || !IsTerminator(*path))) {	/* Without heading separator */

+		dp->obj.sclust = fs->cdir;			/* Start at the current directory */

+	} else

+#endif

+	{										/* With heading separator */

+		while (IsSeparator(*path)) path++;	/* Strip separators */

+		dp->obj.sclust = 0;					/* Start from the root directory */

+	}

+#if FF_FS_EXFAT

+	dp->obj.n_frag = 0;	/* Invalidate last fragment counter of the object */

+#if FF_FS_RPATH != 0

+	if (fs->fs_type == FS_EXFAT && dp->obj.sclust) {	/* exFAT: Retrieve the sub-directory's status */

+		DIR dj;

+

+		dp->obj.c_scl = fs->cdc_scl;

+		dp->obj.c_size = fs->cdc_size;

+		dp->obj.c_ofs = fs->cdc_ofs;

+		res = load_obj_xdir(&dj, &dp->obj);

+		if (res != FR_OK) return res;

+		dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize);

+		dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;

+	}

+#endif

+#endif

+

+	if ((UINT)*path < ' ') {				/* Null path name is the origin directory itself */

+		dp->fn[NSFLAG] = NS_NONAME;

+		res = dir_sdi(dp, 0);

+

+	} else {								/* Follow path */

+		for (;;) {

+			res = create_name(dp, &path);	/* Get a segment name of the path */

+			if (res != FR_OK) break;

+			res = dir_find(dp);				/* Find an object with the segment name */

+			ns = dp->fn[NSFLAG];

+			if (res != FR_OK) {				/* Failed to find the object */

+				if (res == FR_NO_FILE) {	/* Object is not found */

+					if (FF_FS_RPATH && (ns & NS_DOT)) {	/* If dot entry is not exist, stay there */

+						if (!(ns & NS_LAST)) continue;	/* Continue to follow if not last segment */

+						dp->fn[NSFLAG] = NS_NONAME;

+						res = FR_OK;

+					} else {							/* Could not find the object */

+						if (!(ns & NS_LAST)) res = FR_NO_PATH;	/* Adjust error code if not last segment */

+					}

+				}

+				break;

+			}

+			if (ns & NS_LAST) break;		/* Last segment matched. Function completed. */

+			/* Get into the sub-directory */

+			if (!(dp->obj.attr & AM_DIR)) {	/* It is not a sub-directory and cannot follow */

+				res = FR_NO_PATH; break;

+			}

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {	/* Save containing directory information for next dir */

+				dp->obj.c_scl = dp->obj.sclust;

+				dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;

+				dp->obj.c_ofs = dp->blk_ofs;

+				init_alloc_info(fs, &dp->obj);	/* Open next directory */

+			} else

+#endif

+			{

+				dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs));	/* Open next directory */

+			}

+		}

+	}

+

+	return res;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Get logical drive number from path name                               */

+/*-----------------------------------------------------------------------*/

+

+static int get_ldnumber (	/* Returns logical drive number (-1:invalid drive number or null pointer) */

+	const TCHAR** path		/* Pointer to pointer to the path name */

+)

+{

+	const TCHAR *tp, *tt;

+	TCHAR tc;

+	int i;

+	int vol = -1;

+#if FF_STR_VOLUME_ID		/* Find string volume ID */

+	const char *sp;

+	char c;

+#endif

+

+	tt = tp = *path;

+	if (!tp) return vol;	/* Invalid path name? */

+	do tc = *tt++; while (!IsTerminator(tc) && tc != ':');	/* Find a colon in the path */

+

+	if (tc == ':') {	/* DOS/Windows style volume ID? */

+		i = FF_VOLUMES;

+		if (IsDigit(*tp) && tp + 2 == tt) {	/* Is there a numeric volume ID + colon? */

+			i = (int)*tp - '0';	/* Get the LD number */

+		}

+#if FF_STR_VOLUME_ID == 1	/* Arbitrary string is enabled */

+		else {

+			i = 0;

+			do {

+				sp = VolumeStr[i]; tp = *path;	/* This string volume ID and path name */

+				do {	/* Compare the volume ID with path name */

+					c = *sp++; tc = *tp++;

+					if (IsLower(c)) c -= 0x20;

+					if (IsLower(tc)) tc -= 0x20;

+				} while (c && (TCHAR)c == tc);

+			} while ((c || tp != tt) && ++i < FF_VOLUMES);	/* Repeat for each id until pattern match */

+		}

+#endif

+		if (i < FF_VOLUMES) {	/* If a volume ID is found, get the drive number and strip it */

+			vol = i;		/* Drive number */

+			*path = tt;		/* Snip the drive prefix off */

+		}

+		return vol;

+	}

+#if FF_STR_VOLUME_ID == 2		/* Unix style volume ID is enabled */

+	if (*tp == '/') {			/* Is there a volume ID? */

+		while (*(tp + 1) == '/') tp++;	/* Skip duplicated separator */

+		i = 0;

+		do {

+			tt = tp; sp = VolumeStr[i]; /* Path name and this string volume ID */

+			do {	/* Compare the volume ID with path name */

+				c = *sp++; tc = *(++tt);

+				if (IsLower(c)) c -= 0x20;

+				if (IsLower(tc)) tc -= 0x20;

+			} while (c && (TCHAR)c == tc);

+		} while ((c || (tc != '/' && !IsTerminator(tc))) && ++i < FF_VOLUMES);	/* Repeat for each ID until pattern match */

+		if (i < FF_VOLUMES) {	/* If a volume ID is found, get the drive number and strip it */

+			vol = i;		/* Drive number */

+			*path = tt;		/* Snip the drive prefix off */

+		}

+		return vol;

+	}

+#endif

+	/* No drive prefix is found */

+#if FF_FS_RPATH != 0

+	vol = CurrVol;	/* Default drive is current drive */

+#else

+	vol = 0;		/* Default drive is 0 */

+#endif

+	return vol;		/* Return the default drive */

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* GPT support functions                                                 */

+/*-----------------------------------------------------------------------*/

+

+#if FF_LBA64

+

+/* Calculate CRC32 in byte-by-byte */

+

+static DWORD crc32 (	/* Returns next CRC value */

+	DWORD crc,			/* Current CRC value */

+	BYTE d				/* A byte to be processed */

+)

+{

+	BYTE b;

+

+

+	for (b = 1; b; b <<= 1) {

+		crc ^= (d & b) ? 1 : 0;

+		crc = (crc & 1) ? crc >> 1 ^ 0xEDB88320 : crc >> 1;

+	}

+	return crc;

+}

+

+

+/* Check validity of GPT header */

+

+static int test_gpt_header (	/* 0:Invalid, 1:Valid */

+	const BYTE* gpth			/* Pointer to the GPT header */

+)

+{

+	UINT i;

+	DWORD bcc;

+

+

+	if (memcmp(gpth + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16)) return 0;	/* Check sign, version (1.0) and length (92) */

+	for (i = 0, bcc = 0xFFFFFFFF; i < 92; i++) {		/* Check header BCC */

+		bcc = crc32(bcc, i - GPTH_Bcc < 4 ? 0 : gpth[i]);

+	}

+	if (~bcc != ld_dword(gpth + GPTH_Bcc)) return 0;

+	if (ld_dword(gpth + GPTH_PteSize) != SZ_GPTE) return 0;	/* Table entry size (must be SZ_GPTE bytes) */

+	if (ld_dword(gpth + GPTH_PtNum) > 128) return 0;	/* Table size (must be 128 entries or less) */

+

+	return 1;

+}

+

+#if !FF_FS_READONLY && FF_USE_MKFS

+

+/* Generate random value */

+static DWORD make_rand (

+	DWORD seed,		/* Seed value */

+	BYTE* buff,		/* Output buffer */

+	UINT n			/* Data length */

+)

+{

+	UINT r;

+

+

+	if (seed == 0) seed = 1;

+	do {

+		for (r = 0; r < 8; r++) seed = seed & 1 ? seed >> 1 ^ 0xA3000000 : seed >> 1;	/* Shift 8 bits the 32-bit LFSR */

+		*buff++ = (BYTE)seed;

+	} while (--n);

+	return seed;

+}

+

+#endif

+#endif

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Load a sector and check if it is an FAT VBR                           */

+/*-----------------------------------------------------------------------*/

+

+/* Check what the sector is */

+

+static UINT check_fs (	/* 0:FAT/FAT32 VBR, 1:exFAT VBR, 2:Not FAT and valid BS, 3:Not FAT and invalid BS, 4:Disk error */

+	FATFS* fs,			/* Filesystem object */

+	LBA_t sect			/* Sector to load and check if it is an FAT-VBR or not */

+)

+{

+	WORD w, sign;

+	BYTE b;

+

+

+	fs->wflag = 0; fs->winsect = (LBA_t)0 - 1;		/* Invaidate window */

+	if (move_window(fs, sect) != FR_OK) return 4;	/* Load the boot sector */

+	sign = ld_word(fs->win + BS_55AA);

+#if FF_FS_EXFAT

+	if (sign == 0xAA55 && !memcmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT   ", 11)) return 1;	/* It is an exFAT VBR */

+#endif

+	b = fs->win[BS_JmpBoot];

+	if (b == 0xEB || b == 0xE9 || b == 0xE8) {	/* Valid JumpBoot code? (short jump, near jump or near call) */

+		if (sign == 0xAA55 && !memcmp(fs->win + BS_FilSysType32, "FAT32   ", 8)) {

+			return 0;	/* It is an FAT32 VBR */

+		}

+		/* FAT volumes formatted with early MS-DOS lack BS_55AA and BS_FilSysType, so FAT VBR needs to be identified without them. */

+		w = ld_word(fs->win + BPB_BytsPerSec);

+		b = fs->win[BPB_SecPerClus];

+		if ((w & (w - 1)) == 0 && w >= FF_MIN_SS && w <= FF_MAX_SS	/* Properness of sector size (512-4096 and 2^n) */

+			&& b != 0 && (b & (b - 1)) == 0				/* Properness of cluster size (2^n) */

+			&& ld_word(fs->win + BPB_RsvdSecCnt) != 0	/* Properness of reserved sectors (MNBZ) */

+			&& (UINT)fs->win[BPB_NumFATs] - 1 <= 1		/* Properness of FATs (1 or 2) */

+			&& ld_word(fs->win + BPB_RootEntCnt) != 0	/* Properness of root dir entries (MNBZ) */

+			&& (ld_word(fs->win + BPB_TotSec16) >= 128 || ld_dword(fs->win + BPB_TotSec32) >= 0x10000)	/* Properness of volume sectors (>=128) */

+			&& ld_word(fs->win + BPB_FATSz16) != 0) {	/* Properness of FAT size (MNBZ) */

+				return 0;	/* It can be presumed an FAT VBR */

+		}

+	}

+	return sign == 0xAA55 ? 2 : 3;	/* Not an FAT VBR (valid or invalid BS) */

+}

+

+

+/* Find an FAT volume */

+/* (It supports only generic partitioning rules, MBR, GPT and SFD) */

+

+static UINT find_volume (	/* Returns BS status found in the hosting drive */

+	FATFS* fs,		/* Filesystem object */

+	UINT part		/* Partition to fined = 0:auto, 1..:forced */

+)

+{

+	UINT fmt, i;

+	DWORD mbr_pt[4];

+

+

+	fmt = check_fs(fs, 0);				/* Load sector 0 and check if it is an FAT VBR as SFD format */

+	if (fmt != 2 && (fmt >= 3 || part == 0)) return fmt;	/* Returns if it is an FAT VBR as auto scan, not a BS or disk error */

+

+	/* Sector 0 is not an FAT VBR or forced partition number wants a partition */

+

+#if FF_LBA64

+	if (fs->win[MBR_Table + PTE_System] == 0xEE) {	/* GPT protective MBR? */

+		DWORD n_ent, v_ent, ofs;

+		QWORD pt_lba;

+

+		if (move_window(fs, 1) != FR_OK) return 4;	/* Load GPT header sector (next to MBR) */

+		if (!test_gpt_header(fs->win)) return 3;	/* Check if GPT header is valid */

+		n_ent = ld_dword(fs->win + GPTH_PtNum);		/* Number of entries */

+		pt_lba = ld_qword(fs->win + GPTH_PtOfs);	/* Table location */

+		for (v_ent = i = 0; i < n_ent; i++) {		/* Find FAT partition */

+			if (move_window(fs, pt_lba + i * SZ_GPTE / SS(fs)) != FR_OK) return 4;	/* PT sector */

+			ofs = i * SZ_GPTE % SS(fs);												/* Offset in the sector */

+			if (!memcmp(fs->win + ofs + GPTE_PtGuid, GUID_MS_Basic, 16)) {	/* MS basic data partition? */

+				v_ent++;

+				fmt = check_fs(fs, ld_qword(fs->win + ofs + GPTE_FstLba));	/* Load VBR and check status */

+				if (part == 0 && fmt <= 1) return fmt;			/* Auto search (valid FAT volume found first) */

+				if (part != 0 && v_ent == part) return fmt;		/* Forced partition order (regardless of it is valid or not) */

+			}

+		}

+		return 3;	/* Not found */

+	}

+#endif

+	if (FF_MULTI_PARTITION && part > 4) return 3;	/* MBR has 4 partitions max */

+	for (i = 0; i < 4; i++) {		/* Load partition offset in the MBR */

+		mbr_pt[i] = ld_dword(fs->win + MBR_Table + i * SZ_PTE + PTE_StLba);

+	}

+	i = part ? part - 1 : 0;		/* Table index to find first */

+	do {							/* Find an FAT volume */

+		fmt = mbr_pt[i] ? check_fs(fs, mbr_pt[i]) : 3;	/* Check if the partition is FAT */

+	} while (part == 0 && fmt >= 2 && ++i < 4);

+	return fmt;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Determine logical drive number and mount the volume if needed         */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT mount_volume (	/* FR_OK(0): successful, !=0: an error occurred */

+	const TCHAR** path,			/* Pointer to pointer to the path name (drive number) */

+	FATFS** rfs,				/* Pointer to pointer to the found filesystem object */

+	BYTE mode					/* !=0: Check write protection for write access */

+)

+{

+	int vol;

+	DSTATUS stat;

+	LBA_t bsect;

+	DWORD tsect, sysect, fasize, nclst, szbfat;

+	WORD nrsv;

+	FATFS *fs;

+	UINT fmt;

+

+

+	/* Get logical drive number */

+	*rfs = 0;

+	vol = get_ldnumber(path);

+	if (vol < 0) return FR_INVALID_DRIVE;

+

+	/* Check if the filesystem object is valid or not */

+	fs = FatFs[vol];					/* Get pointer to the filesystem object */

+	if (!fs) return FR_NOT_ENABLED;		/* Is the filesystem object available? */

+#if FF_FS_REENTRANT

+	if (!lock_fs(fs)) return FR_TIMEOUT;	/* Lock the volume */

+#endif

+	*rfs = fs;							/* Return pointer to the filesystem object */

+

+	mode &= (BYTE)~FA_READ;				/* Desired access mode, write access or not */

+	if (fs->fs_type != 0) {				/* If the volume has been mounted */

+		stat = disk_status(fs->pdrv);

+		if (!(stat & STA_NOINIT)) {		/* and the physical drive is kept initialized */

+			if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) {	/* Check write protection if needed */

+				return FR_WRITE_PROTECTED;

+			}

+			return FR_OK;				/* The filesystem object is already valid */

+		}

+	}

+

+	/* The filesystem object is not valid. */

+	/* Following code attempts to mount the volume. (find an FAT volume, analyze the BPB and initialize the filesystem object) */

+

+	fs->fs_type = 0;					/* Clear the filesystem object */

+	fs->pdrv = LD2PD(vol);				/* Volume hosting physical drive */

+	stat = disk_initialize(fs->pdrv);	/* Initialize the physical drive */

+	if (stat & STA_NOINIT) { 			/* Check if the initialization succeeded */

+		return FR_NOT_READY;			/* Failed to initialize due to no medium or hard error */

+	}

+	if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */

+		return FR_WRITE_PROTECTED;

+	}

+#if FF_MAX_SS != FF_MIN_SS				/* Get sector size (multiple sector size cfg only) */

+	if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;

+	if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;

+#endif

+

+	/* Find an FAT volume on the drive */

+	fmt = find_volume(fs, LD2PT(vol));

+	if (fmt == 4) return FR_DISK_ERR;		/* An error occured in the disk I/O layer */

+	if (fmt >= 2) return FR_NO_FILESYSTEM;	/* No FAT volume is found */

+	bsect = fs->winsect;					/* Volume offset */

+

+	/* An FAT volume is found (bsect). Following code initializes the filesystem object */

+

+#if FF_FS_EXFAT

+	if (fmt == 1) {

+		QWORD maxlba;

+		DWORD so, cv, bcl, i;

+

+		for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ;	/* Check zero filler */

+		if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;

+

+		if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM;	/* Check exFAT version (must be version 1.0) */

+

+		if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) {	/* (BPB_BytsPerSecEx must be equal to the physical sector size) */

+			return FR_NO_FILESYSTEM;

+		}

+

+		maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect;	/* Last LBA of the volume + 1 */

+		if (!FF_LBA64 && maxlba >= 0x100000000) return FR_NO_FILESYSTEM;	/* (It cannot be accessed in 32-bit LBA) */

+

+		fs->fsize = ld_dword(fs->win + BPB_FatSzEx);	/* Number of sectors per FAT */

+

+		fs->n_fats = fs->win[BPB_NumFATsEx];			/* Number of FATs */

+		if (fs->n_fats != 1) return FR_NO_FILESYSTEM;	/* (Supports only 1 FAT) */

+

+		fs->csize = 1 << fs->win[BPB_SecPerClusEx];		/* Cluster size */

+		if (fs->csize == 0)	return FR_NO_FILESYSTEM;	/* (Must be 1..32768 sectors) */

+

+		nclst = ld_dword(fs->win + BPB_NumClusEx);		/* Number of clusters */

+		if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM;	/* (Too many clusters) */

+		fs->n_fatent = nclst + 2;

+

+		/* Boundaries and Limits */

+		fs->volbase = bsect;

+		fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);

+		fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);

+		if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM;	/* (Volume size must not be smaller than the size requiered) */

+		fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);

+

+		/* Get bitmap location and check if it is contiguous (implementation assumption) */

+		so = i = 0;

+		for (;;) {	/* Find the bitmap entry in the root directory (in only first cluster) */

+			if (i == 0) {

+				if (so >= fs->csize) return FR_NO_FILESYSTEM;	/* Not found? */

+				if (move_window(fs, clst2sect(fs, (DWORD)fs->dirbase) + so) != FR_OK) return FR_DISK_ERR;

+				so++;

+			}

+			if (fs->win[i] == ET_BITMAP) break;			/* Is it a bitmap entry? */

+			i = (i + SZDIRE) % SS(fs);	/* Next entry */

+		}

+		bcl = ld_dword(fs->win + i + 20);				/* Bitmap cluster */

+		if (bcl < 2 || bcl >= fs->n_fatent) return FR_NO_FILESYSTEM;	/* (Wrong cluster#) */

+		fs->bitbase = fs->database + fs->csize * (bcl - 2);	/* Bitmap sector */

+		for (;;) {	/* Check if bitmap is contiguous */

+			if (move_window(fs, fs->fatbase + bcl / (SS(fs) / 4)) != FR_OK) return FR_DISK_ERR;

+			cv = ld_dword(fs->win + bcl % (SS(fs) / 4) * 4);

+			if (cv == 0xFFFFFFFF) break;				/* Last link? */

+			if (cv != ++bcl) return FR_NO_FILESYSTEM;	/* Fragmented? */

+		}

+

+#if !FF_FS_READONLY

+		fs->last_clst = fs->free_clst = 0xFFFFFFFF;		/* Initialize cluster allocation information */

+#endif

+		fmt = FS_EXFAT;			/* FAT sub-type */

+	} else

+#endif	/* FF_FS_EXFAT */

+	{

+		if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM;	/* (BPB_BytsPerSec must be equal to the physical sector size) */

+

+		fasize = ld_word(fs->win + BPB_FATSz16);		/* Number of sectors per FAT */

+		if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);

+		fs->fsize = fasize;

+

+		fs->n_fats = fs->win[BPB_NumFATs];				/* Number of FATs */

+		if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM;	/* (Must be 1 or 2) */

+		fasize *= fs->n_fats;							/* Number of sectors for FAT area */

+

+		fs->csize = fs->win[BPB_SecPerClus];			/* Cluster size */

+		if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM;	/* (Must be power of 2) */

+

+		fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt);	/* Number of root directory entries */

+		if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM;	/* (Must be sector aligned) */

+

+		tsect = ld_word(fs->win + BPB_TotSec16);		/* Number of sectors on the volume */

+		if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);

+

+		nrsv = ld_word(fs->win + BPB_RsvdSecCnt);		/* Number of reserved sectors */

+		if (nrsv == 0) return FR_NO_FILESYSTEM;			/* (Must not be 0) */

+

+		/* Determine the FAT sub type */

+		sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE);	/* RSV + FAT + DIR */

+		if (tsect < sysect) return FR_NO_FILESYSTEM;	/* (Invalid volume size) */

+		nclst = (tsect - sysect) / fs->csize;			/* Number of clusters */

+		if (nclst == 0) return FR_NO_FILESYSTEM;		/* (Invalid volume size) */

+		fmt = 0;

+		if (nclst <= MAX_FAT32) fmt = FS_FAT32;

+		if (nclst <= MAX_FAT16) fmt = FS_FAT16;

+		if (nclst <= MAX_FAT12) fmt = FS_FAT12;

+		if (fmt == 0) return FR_NO_FILESYSTEM;

+

+		/* Boundaries and Limits */

+		fs->n_fatent = nclst + 2;						/* Number of FAT entries */

+		fs->volbase = bsect;							/* Volume start sector */

+		fs->fatbase = bsect + nrsv; 					/* FAT start sector */

+		fs->database = bsect + sysect;					/* Data start sector */

+		if (fmt == FS_FAT32) {

+			if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM;	/* (Must be FAT32 revision 0.0) */

+			if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM;	/* (BPB_RootEntCnt must be 0) */

+			fs->dirbase = ld_dword(fs->win + BPB_RootClus32);	/* Root directory start cluster */

+			szbfat = fs->n_fatent * 4;					/* (Needed FAT size) */

+		} else {

+			if (fs->n_rootdir == 0)	return FR_NO_FILESYSTEM;	/* (BPB_RootEntCnt must not be 0) */

+			fs->dirbase = fs->fatbase + fasize;			/* Root directory start sector */

+			szbfat = (fmt == FS_FAT16) ?				/* (Needed FAT size) */

+				fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);

+		}

+		if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM;	/* (BPB_FATSz must not be less than the size needed) */

+

+#if !FF_FS_READONLY

+		/* Get FSInfo if available */

+		fs->last_clst = fs->free_clst = 0xFFFFFFFF;		/* Initialize cluster allocation information */

+		fs->fsi_flag = 0x80;

+#if (FF_FS_NOFSINFO & 3) != 3

+		if (fmt == FS_FAT32				/* Allow to update FSInfo only if BPB_FSInfo32 == 1 */

+			&& ld_word(fs->win + BPB_FSInfo32) == 1

+			&& move_window(fs, bsect + 1) == FR_OK)

+		{

+			fs->fsi_flag = 0;

+			if (ld_word(fs->win + BS_55AA) == 0xAA55	/* Load FSInfo data if available */

+				&& ld_dword(fs->win + FSI_LeadSig) == 0x41615252

+				&& ld_dword(fs->win + FSI_StrucSig) == 0x61417272)

+			{

+#if (FF_FS_NOFSINFO & 1) == 0

+				fs->free_clst = ld_dword(fs->win + FSI_Free_Count);

+#endif

+#if (FF_FS_NOFSINFO & 2) == 0

+				fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);

+#endif

+			}

+		}

+#endif	/* (FF_FS_NOFSINFO & 3) != 3 */

+#endif	/* !FF_FS_READONLY */

+	}

+

+	fs->fs_type = (BYTE)fmt;/* FAT sub-type */

+	fs->id = ++Fsid;		/* Volume mount ID */

+#if FF_USE_LFN == 1

+	fs->lfnbuf = LfnBuf;	/* Static LFN working buffer */

+#if FF_FS_EXFAT

+	fs->dirbuf = DirBuf;	/* Static directory block scratchpad buuffer */

+#endif

+#endif

+#if FF_FS_RPATH != 0

+	fs->cdir = 0;			/* Initialize current directory */

+#endif

+#if FF_FS_LOCK != 0			/* Clear file lock semaphores */

+	clear_lock(fs);

+#endif

+	return FR_OK;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Check if the file/directory object is valid or not                    */

+/*-----------------------------------------------------------------------*/

+

+static FRESULT validate (	/* Returns FR_OK or FR_INVALID_OBJECT */

+	FFOBJID* obj,			/* Pointer to the FFOBJID, the 1st member in the FIL/DIR object, to check validity */

+	FATFS** rfs				/* Pointer to pointer to the owner filesystem object to return */

+)

+{

+	FRESULT res = FR_INVALID_OBJECT;

+

+

+	if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) {	/* Test if the object is valid */

+#if FF_FS_REENTRANT

+		if (lock_fs(obj->fs)) {	/* Obtain the filesystem object */

+			if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */

+				res = FR_OK;

+			} else {

+				unlock_fs(obj->fs, FR_OK);

+			}

+		} else {

+			res = FR_TIMEOUT;

+		}

+#else

+		if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */

+			res = FR_OK;

+		}

+#endif

+	}

+	*rfs = (res == FR_OK) ? obj->fs : 0;	/* Corresponding filesystem object */

+	return res;

+}

+

+

+

+

+/*---------------------------------------------------------------------------

+

+   Public Functions (FatFs API)

+

+----------------------------------------------------------------------------*/

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Mount/Unmount a Logical Drive                                         */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_mount (

+	FATFS* fs,			/* Pointer to the filesystem object to be registered (NULL:unmount)*/

+	const TCHAR* path,	/* Logical drive number to be mounted/unmounted */

+	BYTE opt			/* Mount option: 0=Do not mount (delayed mount), 1=Mount immediately */

+)

+{

+	FATFS *cfs;

+	int vol;

+	FRESULT res;

+	const TCHAR *rp = path;

+

+

+	/* Get logical drive number */

+	vol = get_ldnumber(&rp);

+	if (vol < 0) return FR_INVALID_DRIVE;

+	cfs = FatFs[vol];					/* Pointer to fs object */

+

+	if (cfs) {

+#if FF_FS_LOCK != 0

+		clear_lock(cfs);

+#endif

+#if FF_FS_REENTRANT						/* Discard sync object of the current volume */

+		if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;

+#endif

+		cfs->fs_type = 0;				/* Clear old fs object */

+	}

+

+	if (fs) {

+		fs->fs_type = 0;				/* Clear new fs object */

+#if FF_FS_REENTRANT						/* Create sync object for the new volume */

+		if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;

+#endif

+	}

+	FatFs[vol] = fs;					/* Register new fs object */

+

+	if (opt == 0) return FR_OK;			/* Do not mount now, it will be mounted later */

+

+	res = mount_volume(&path, &fs, 0);	/* Force mounted the volume */

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Open or Create a File                                                 */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_open (

+	FIL* fp,			/* Pointer to the blank file object */

+	const TCHAR* path,	/* Pointer to the file name */

+	BYTE mode			/* Access mode and open mode flags */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+#if !FF_FS_READONLY

+	DWORD cl, bcs, clst, tm;

+	LBA_t sc;

+	FSIZE_t ofs;

+#endif

+	DEF_NAMBUF

+

+

+	if (!fp) return FR_INVALID_OBJECT;

+

+	/* Get logical drive number */

+	mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND;

+	res = mount_volume(&path, &fs, mode);

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+#if !FF_FS_READONLY	/* Read/Write configuration */

+		if (res == FR_OK) {

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* Origin directory itself? */

+				res = FR_INVALID_NAME;

+			}

+#if FF_FS_LOCK != 0

+			else {

+				res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);		/* Check if the file can be used */

+			}

+#endif

+		}

+		/* Create or Open a file */

+		if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {

+			if (res != FR_OK) {					/* No file, create new */

+				if (res == FR_NO_FILE) {		/* There is no file to open, create a new entry */

+#if FF_FS_LOCK != 0

+					res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;

+#else

+					res = dir_register(&dj);

+#endif

+				}

+				mode |= FA_CREATE_ALWAYS;		/* File is created */

+			}

+			else {								/* Any object with the same name is already existing */

+				if (dj.obj.attr & (AM_RDO | AM_DIR)) {	/* Cannot overwrite it (R/O or DIR) */

+					res = FR_DENIED;

+				} else {

+					if (mode & FA_CREATE_NEW) res = FR_EXIST;	/* Cannot create as new file */

+				}

+			}

+			if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {	/* Truncate the file if overwrite mode */

+#if FF_FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {

+					/* Get current allocation info */

+					fp->obj.fs = fs;

+					init_alloc_info(fs, &fp->obj);

+					/* Set directory entry block initial state */

+					memset(fs->dirbuf + 2, 0, 30);	/* Clear 85 entry except for NumSec */

+					memset(fs->dirbuf + 38, 0, 26);	/* Clear C0 entry except for NumName and NameHash */

+					fs->dirbuf[XDIR_Attr] = AM_ARC;

+					st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME());

+					fs->dirbuf[XDIR_GenFlags] = 1;

+					res = store_xdir(&dj);

+					if (res == FR_OK && fp->obj.sclust != 0) {	/* Remove the cluster chain if exist */

+						res = remove_chain(&fp->obj, fp->obj.sclust, 0);

+						fs->last_clst = fp->obj.sclust - 1;		/* Reuse the cluster hole */

+					}

+				} else

+#endif

+				{

+					/* Set directory entry initial state */

+					tm = GET_FATTIME();					/* Set created time */

+					st_dword(dj.dir + DIR_CrtTime, tm);

+					st_dword(dj.dir + DIR_ModTime, tm);

+					cl = ld_clust(fs, dj.dir);			/* Get current cluster chain */

+					dj.dir[DIR_Attr] = AM_ARC;			/* Reset attribute */

+					st_clust(fs, dj.dir, 0);			/* Reset file allocation info */

+					st_dword(dj.dir + DIR_FileSize, 0);

+					fs->wflag = 1;

+					if (cl != 0) {						/* Remove the cluster chain if exist */

+						sc = fs->winsect;

+						res = remove_chain(&dj.obj, cl, 0);

+						if (res == FR_OK) {

+							res = move_window(fs, sc);

+							fs->last_clst = cl - 1;		/* Reuse the cluster hole */

+						}

+					}

+				}

+			}

+		}

+		else {	/* Open an existing file */

+			if (res == FR_OK) {					/* Is the object exsiting? */

+				if (dj.obj.attr & AM_DIR) {		/* File open against a directory */

+					res = FR_NO_FILE;

+				} else {

+					if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */

+						res = FR_DENIED;

+					}

+				}

+			}

+		}

+		if (res == FR_OK) {

+			if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED;	/* Set file change flag if created or overwritten */

+			fp->dir_sect = fs->winsect;			/* Pointer to the directory entry */

+			fp->dir_ptr = dj.dir;

+#if FF_FS_LOCK != 0

+			fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);	/* Lock the file for this session */

+			if (fp->obj.lockid == 0) res = FR_INT_ERR;

+#endif

+		}

+#else		/* R/O configuration */

+		if (res == FR_OK) {

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* Is it origin directory itself? */

+				res = FR_INVALID_NAME;

+			} else {

+				if (dj.obj.attr & AM_DIR) {		/* Is it a directory? */

+					res = FR_NO_FILE;

+				}

+			}

+		}

+#endif

+

+		if (res == FR_OK) {

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				fp->obj.c_scl = dj.obj.sclust;							/* Get containing directory info */

+				fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;

+				fp->obj.c_ofs = dj.blk_ofs;

+				init_alloc_info(fs, &fp->obj);

+			} else

+#endif

+			{

+				fp->obj.sclust = ld_clust(fs, dj.dir);					/* Get object allocation info */

+				fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);

+			}

+#if FF_USE_FASTSEEK

+			fp->cltbl = 0;		/* Disable fast seek mode */

+#endif

+			fp->obj.fs = fs;	/* Validate the file object */

+			fp->obj.id = fs->id;

+			fp->flag = mode;	/* Set file access mode */

+			fp->err = 0;		/* Clear error flag */

+			fp->sect = 0;		/* Invalidate current data sector */

+			fp->fptr = 0;		/* Set file pointer top of the file */

+#if !FF_FS_READONLY

+#if !FF_FS_TINY

+			memset(fp->buf, 0, sizeof fp->buf);	/* Clear sector buffer */

+#endif

+			if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) {	/* Seek to end of file if FA_OPEN_APPEND is specified */

+				fp->fptr = fp->obj.objsize;			/* Offset to seek */

+				bcs = (DWORD)fs->csize * SS(fs);	/* Cluster size in byte */

+				clst = fp->obj.sclust;				/* Follow the cluster chain */

+				for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {

+					clst = get_fat(&fp->obj, clst);

+					if (clst <= 1) res = FR_INT_ERR;

+					if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;

+				}

+				fp->clust = clst;

+				if (res == FR_OK && ofs % SS(fs)) {	/* Fill sector buffer if not on the sector boundary */

+					sc = clst2sect(fs, clst);

+					if (sc == 0) {

+						res = FR_INT_ERR;

+					} else {

+						fp->sect = sc + (DWORD)(ofs / SS(fs));

+#if !FF_FS_TINY

+						if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;

+#endif

+					}

+				}

+#if FF_FS_LOCK != 0

+				if (res != FR_OK) dec_lock(fp->obj.lockid); /* Decrement file open counter if seek failed */

+#endif

+			}

+#endif

+		}

+

+		FREE_NAMBUF();

+	}

+

+	if (res != FR_OK) fp->obj.fs = 0;	/* Invalidate file object on error */

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Read File                                                             */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_read (

+	FIL* fp, 	/* Open file to be read */

+	void* buff,	/* Data buffer to store the read data */

+	UINT btr,	/* Number of bytes to read */

+	UINT* br	/* Number of bytes read */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst;

+	LBA_t sect;

+	FSIZE_t remain;

+	UINT rcnt, cc, csect;

+	BYTE *rbuff = (BYTE*)buff;

+

+

+	*br = 0;	/* Clear read byte counter */

+	res = validate(&fp->obj, &fs);				/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);	/* Check validity */

+	if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */

+	remain = fp->obj.objsize - fp->fptr;

+	if (btr > remain) btr = (UINT)remain;		/* Truncate btr by remaining bytes */

+

+	for ( ; btr > 0; btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) {	/* Repeat until btr bytes read */

+		if (fp->fptr % SS(fs) == 0) {			/* On the sector boundary? */

+			csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1));	/* Sector offset in the cluster */

+			if (csect == 0) {					/* On the cluster boundary? */

+				if (fp->fptr == 0) {			/* On the top of the file? */

+					clst = fp->obj.sclust;		/* Follow cluster chain from the origin */

+				} else {						/* Middle or end of the file */

+#if FF_USE_FASTSEEK

+					if (fp->cltbl) {

+						clst = clmt_clust(fp, fp->fptr);	/* Get cluster# from the CLMT */

+					} else

+#endif

+					{

+						clst = get_fat(&fp->obj, fp->clust);	/* Follow cluster chain on the FAT */

+					}

+				}

+				if (clst < 2) ABORT(fs, FR_INT_ERR);

+				if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+				fp->clust = clst;				/* Update current cluster */

+			}

+			sect = clst2sect(fs, fp->clust);	/* Get current sector */

+			if (sect == 0) ABORT(fs, FR_INT_ERR);

+			sect += csect;

+			cc = btr / SS(fs);					/* When remaining bytes >= sector size, */

+			if (cc > 0) {						/* Read maximum contiguous sectors directly */

+				if (csect + cc > fs->csize) {	/* Clip at cluster boundary */

+					cc = fs->csize - csect;

+				}

+				if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);

+#if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2		/* Replace one of the read sectors with cached data if it contains a dirty sector */

+#if FF_FS_TINY

+				if (fs->wflag && fs->winsect - sect < cc) {

+					memcpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));

+				}

+#else

+				if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {

+					memcpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));

+				}

+#endif

+#endif

+				rcnt = SS(fs) * cc;				/* Number of bytes transferred */

+				continue;

+			}

+#if !FF_FS_TINY

+			if (fp->sect != sect) {			/* Load data sector if not in cache */

+#if !FF_FS_READONLY

+				if (fp->flag & FA_DIRTY) {		/* Write-back dirty sector cache */

+					if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+					fp->flag &= (BYTE)~FA_DIRTY;

+				}

+#endif

+				if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK)	ABORT(fs, FR_DISK_ERR);	/* Fill sector cache */

+			}

+#endif

+			fp->sect = sect;

+		}

+		rcnt = SS(fs) - (UINT)fp->fptr % SS(fs);	/* Number of bytes remains in the sector */

+		if (rcnt > btr) rcnt = btr;					/* Clip it by btr if needed */

+#if FF_FS_TINY

+		if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Move sector window */

+		memcpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt);	/* Extract partial sector */

+#else

+		memcpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt);	/* Extract partial sector */

+#endif

+	}

+

+	LEAVE_FF(fs, FR_OK);

+}

+

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Write File                                                            */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_write (

+	FIL* fp,			/* Open file to be written */

+	const void* buff,	/* Data to be written */

+	UINT btw,			/* Number of bytes to write */

+	UINT* bw			/* Number of bytes written */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst;

+	LBA_t sect;

+	UINT wcnt, cc, csect;

+	const BYTE *wbuff = (const BYTE*)buff;

+

+

+	*bw = 0;	/* Clear write byte counter */

+	res = validate(&fp->obj, &fs);			/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);	/* Check validity */

+	if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);	/* Check access mode */

+

+	/* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */

+	if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {

+		btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);

+	}

+

+	for ( ; btw > 0; btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) {	/* Repeat until all data written */

+		if (fp->fptr % SS(fs) == 0) {		/* On the sector boundary? */

+			csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1);	/* Sector offset in the cluster */

+			if (csect == 0) {				/* On the cluster boundary? */

+				if (fp->fptr == 0) {		/* On the top of the file? */

+					clst = fp->obj.sclust;	/* Follow from the origin */

+					if (clst == 0) {		/* If no cluster is allocated, */

+						clst = create_chain(&fp->obj, 0);	/* create a new cluster chain */

+					}

+				} else {					/* On the middle or end of the file */

+#if FF_USE_FASTSEEK

+					if (fp->cltbl) {

+						clst = clmt_clust(fp, fp->fptr);	/* Get cluster# from the CLMT */

+					} else

+#endif

+					{

+						clst = create_chain(&fp->obj, fp->clust);	/* Follow or stretch cluster chain on the FAT */

+					}

+				}

+				if (clst == 0) break;		/* Could not allocate a new cluster (disk full) */

+				if (clst == 1) ABORT(fs, FR_INT_ERR);

+				if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+				fp->clust = clst;			/* Update current cluster */

+				if (fp->obj.sclust == 0) fp->obj.sclust = clst;	/* Set start cluster if the first write */

+			}

+#if FF_FS_TINY

+			if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Write-back sector cache */

+#else

+			if (fp->flag & FA_DIRTY) {		/* Write-back sector cache */

+				if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			sect = clst2sect(fs, fp->clust);	/* Get current sector */

+			if (sect == 0) ABORT(fs, FR_INT_ERR);

+			sect += csect;

+			cc = btw / SS(fs);				/* When remaining bytes >= sector size, */

+			if (cc > 0) {					/* Write maximum contiguous sectors directly */

+				if (csect + cc > fs->csize) {	/* Clip at cluster boundary */

+					cc = fs->csize - csect;

+				}

+				if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);

+#if FF_FS_MINIMIZE <= 2

+#if FF_FS_TINY

+				if (fs->winsect - sect < cc) {	/* Refill sector cache if it gets invalidated by the direct write */

+					memcpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));

+					fs->wflag = 0;

+				}

+#else

+				if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */

+					memcpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));

+					fp->flag &= (BYTE)~FA_DIRTY;

+				}

+#endif

+#endif

+				wcnt = SS(fs) * cc;		/* Number of bytes transferred */

+				continue;

+			}

+#if FF_FS_TINY

+			if (fp->fptr >= fp->obj.objsize) {	/* Avoid silly cache filling on the growing edge */

+				if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);

+				fs->winsect = sect;

+			}

+#else

+			if (fp->sect != sect && 		/* Fill sector cache with file data */

+				fp->fptr < fp->obj.objsize &&

+				disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) {

+					ABORT(fs, FR_DISK_ERR);

+			}

+#endif

+			fp->sect = sect;

+		}

+		wcnt = SS(fs) - (UINT)fp->fptr % SS(fs);	/* Number of bytes remains in the sector */

+		if (wcnt > btw) wcnt = btw;					/* Clip it by btw if needed */

+#if FF_FS_TINY

+		if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Move sector window */

+		memcpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt);	/* Fit data to the sector */

+		fs->wflag = 1;

+#else

+		memcpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt);	/* Fit data to the sector */

+		fp->flag |= FA_DIRTY;

+#endif

+	}

+

+	fp->flag |= FA_MODIFIED;				/* Set file change flag */

+

+	LEAVE_FF(fs, FR_OK);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Synchronize the File                                                  */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_sync (

+	FIL* fp		/* Open file to be synced */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD tm;

+	BYTE *dir;

+

+

+	res = validate(&fp->obj, &fs);	/* Check validity of the file object */

+	if (res == FR_OK) {

+		if (fp->flag & FA_MODIFIED) {	/* Is there any change to the file? */

+#if !FF_FS_TINY

+			if (fp->flag & FA_DIRTY) {	/* Write-back cached data if needed */

+				if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			/* Update the directory entry */

+			tm = GET_FATTIME();				/* Modified time */

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				res = fill_first_frag(&fp->obj);	/* Fill first fragment on the FAT if needed */

+				if (res == FR_OK) {

+					res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF);	/* Fill last fragment on the FAT if needed */

+				}

+				if (res == FR_OK) {

+					DIR dj;

+					DEF_NAMBUF

+

+					INIT_NAMBUF(fs);

+					res = load_obj_xdir(&dj, &fp->obj);	/* Load directory entry block */

+					if (res == FR_OK) {

+						fs->dirbuf[XDIR_Attr] |= AM_ARC;				/* Set archive attribute to indicate that the file has been changed */

+						fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1;	/* Update file allocation information */

+						st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust);		/* Update start cluster */

+						st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize);		/* Update file size */

+						st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize);	/* (FatFs does not support Valid File Size feature) */

+						st_dword(fs->dirbuf + XDIR_ModTime, tm);		/* Update modified time */

+						fs->dirbuf[XDIR_ModTime10] = 0;

+						st_dword(fs->dirbuf + XDIR_AccTime, 0);

+						res = store_xdir(&dj);	/* Restore it to the directory */

+						if (res == FR_OK) {

+							res = sync_fs(fs);

+							fp->flag &= (BYTE)~FA_MODIFIED;

+						}

+					}

+					FREE_NAMBUF();

+				}

+			} else

+#endif

+			{

+				res = move_window(fs, fp->dir_sect);

+				if (res == FR_OK) {

+					dir = fp->dir_ptr;

+					dir[DIR_Attr] |= AM_ARC;						/* Set archive attribute to indicate that the file has been changed */

+					st_clust(fp->obj.fs, dir, fp->obj.sclust);		/* Update file allocation information  */

+					st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize);	/* Update file size */

+					st_dword(dir + DIR_ModTime, tm);				/* Update modified time */

+					st_word(dir + DIR_LstAccDate, 0);

+					fs->wflag = 1;

+					res = sync_fs(fs);					/* Restore it to the directory */

+					fp->flag &= (BYTE)~FA_MODIFIED;

+				}

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* !FF_FS_READONLY */

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Close File                                                            */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_close (

+	FIL* fp		/* Open file to be closed */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+

+#if !FF_FS_READONLY

+	res = f_sync(fp);					/* Flush cached data */

+	if (res == FR_OK)

+#endif

+	{

+		res = validate(&fp->obj, &fs);	/* Lock volume */

+		if (res == FR_OK) {

+#if FF_FS_LOCK != 0

+			res = dec_lock(fp->obj.lockid);		/* Decrement file open counter */

+			if (res == FR_OK) fp->obj.fs = 0;	/* Invalidate file object */

+#else

+			fp->obj.fs = 0;	/* Invalidate file object */

+#endif

+#if FF_FS_REENTRANT

+			unlock_fs(fs, FR_OK);		/* Unlock volume */

+#endif

+		}

+	}

+	return res;

+}

+

+

+

+

+#if FF_FS_RPATH >= 1

+/*-----------------------------------------------------------------------*/

+/* Change Current Directory or Current Drive, Get Current Directory      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_chdrive (

+	const TCHAR* path		/* Drive number to set */

+)

+{

+	int vol;

+

+

+	/* Get logical drive number */

+	vol = get_ldnumber(&path);

+	if (vol < 0) return FR_INVALID_DRIVE;

+	CurrVol = (BYTE)vol;	/* Set it as current volume */

+

+	return FR_OK;

+}

+

+

+

+FRESULT f_chdir (

+	const TCHAR* path	/* Pointer to the directory path */

+)

+{

+#if FF_STR_VOLUME_ID == 2

+	UINT i;

+#endif

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	res = mount_volume(&path, &fs, 0);

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);		/* Follow the path */

+		if (res == FR_OK) {					/* Follow completed */

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* Is it the start directory itself? */

+				fs->cdir = dj.obj.sclust;

+#if FF_FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {

+					fs->cdc_scl = dj.obj.c_scl;

+					fs->cdc_size = dj.obj.c_size;

+					fs->cdc_ofs = dj.obj.c_ofs;

+				}

+#endif

+			} else {

+				if (dj.obj.attr & AM_DIR) {	/* It is a sub-directory */

+#if FF_FS_EXFAT

+					if (fs->fs_type == FS_EXFAT) {

+						fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus);		/* Sub-directory cluster */

+						fs->cdc_scl = dj.obj.sclust;						/* Save containing directory information */

+						fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;

+						fs->cdc_ofs = dj.blk_ofs;

+					} else

+#endif

+					{

+						fs->cdir = ld_clust(fs, dj.dir);					/* Sub-directory cluster */

+					}

+				} else {

+					res = FR_NO_PATH;		/* Reached but a file */

+				}

+			}

+		}

+		FREE_NAMBUF();

+		if (res == FR_NO_FILE) res = FR_NO_PATH;

+#if FF_STR_VOLUME_ID == 2	/* Also current drive is changed if in Unix style volume ID */

+		if (res == FR_OK) {

+			for (i = FF_VOLUMES - 1; i && fs != FatFs[i]; i--) ;	/* Set current drive */

+			CurrVol = (BYTE)i;

+		}

+#endif

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+#if FF_FS_RPATH >= 2

+FRESULT f_getcwd (

+	TCHAR* buff,	/* Pointer to the directory path */

+	UINT len		/* Size of buff in unit of TCHAR */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	UINT i, n;

+	DWORD ccl;

+	TCHAR *tp = buff;

+#if FF_VOLUMES >= 2

+	UINT vl;

+#if FF_STR_VOLUME_ID

+	const char *vp;

+#endif

+#endif

+	FILINFO fno;

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	buff[0] = 0;	/* Set null string to get current volume */

+	res = mount_volume((const TCHAR**)&buff, &fs, 0);	/* Get current volume */

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+

+		/* Follow parent directories and create the path */

+		i = len;			/* Bottom of buffer (directory stack base) */

+		if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {	/* (Cannot do getcwd on exFAT and returns root path) */

+			dj.obj.sclust = fs->cdir;				/* Start to follow upper directory from current directory */

+			while ((ccl = dj.obj.sclust) != 0) {	/* Repeat while current directory is a sub-directory */

+				res = dir_sdi(&dj, 1 * SZDIRE);	/* Get parent directory */

+				if (res != FR_OK) break;

+				res = move_window(fs, dj.sect);

+				if (res != FR_OK) break;

+				dj.obj.sclust = ld_clust(fs, dj.dir);	/* Goto parent directory */

+				res = dir_sdi(&dj, 0);

+				if (res != FR_OK) break;

+				do {							/* Find the entry links to the child directory */

+					res = DIR_READ_FILE(&dj);

+					if (res != FR_OK) break;

+					if (ccl == ld_clust(fs, dj.dir)) break;	/* Found the entry */

+					res = dir_next(&dj, 0);

+				} while (res == FR_OK);

+				if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */

+				if (res != FR_OK) break;

+				get_fileinfo(&dj, &fno);		/* Get the directory name and push it to the buffer */

+				for (n = 0; fno.fname[n]; n++) ;	/* Name length */

+				if (i < n + 1) {	/* Insufficient space to store the path name? */

+					res = FR_NOT_ENOUGH_CORE; break;

+				}

+				while (n) buff[--i] = fno.fname[--n];	/* Stack the name */

+				buff[--i] = '/';

+			}

+		}

+		if (res == FR_OK) {

+			if (i == len) buff[--i] = '/';	/* Is it the root-directory? */

+#if FF_VOLUMES >= 2			/* Put drive prefix */

+			vl = 0;

+#if FF_STR_VOLUME_ID >= 1	/* String volume ID */

+			for (n = 0, vp = (const char*)VolumeStr[CurrVol]; vp[n]; n++) ;

+			if (i >= n + 2) {

+				if (FF_STR_VOLUME_ID == 2) *tp++ = (TCHAR)'/';

+				for (vl = 0; vl < n; *tp++ = (TCHAR)vp[vl], vl++) ;

+				if (FF_STR_VOLUME_ID == 1) *tp++ = (TCHAR)':';

+				vl++;

+			}

+#else						/* Numeric volume ID */

+			if (i >= 3) {

+				*tp++ = (TCHAR)'0' + CurrVol;

+				*tp++ = (TCHAR)':';

+				vl = 2;

+			}

+#endif

+			if (vl == 0) res = FR_NOT_ENOUGH_CORE;

+#endif

+			/* Add current directory path */

+			if (res == FR_OK) {

+				do *tp++ = buff[i++]; while (i < len);	/* Copy stacked path string */

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	*tp = 0;

+	LEAVE_FF(fs, res);

+}

+

+#endif /* FF_FS_RPATH >= 2 */

+#endif /* FF_FS_RPATH >= 1 */

+

+

+

+#if FF_FS_MINIMIZE <= 2

+/*-----------------------------------------------------------------------*/

+/* Seek File Read/Write Pointer                                          */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_lseek (

+	FIL* fp,		/* Pointer to the file object */

+	FSIZE_t ofs		/* File pointer from top of file */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst, bcs;

+	LBA_t nsect;

+	FSIZE_t ifptr;

+#if FF_USE_FASTSEEK

+	DWORD cl, pcl, ncl, tcl, tlen, ulen;

+	DWORD *tbl;

+	LBA_t dsc;

+#endif

+

+	res = validate(&fp->obj, &fs);		/* Check validity of the file object */

+	if (res == FR_OK) res = (FRESULT)fp->err;

+#if FF_FS_EXFAT && !FF_FS_READONLY

+	if (res == FR_OK && fs->fs_type == FS_EXFAT) {

+		res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF);	/* Fill last fragment on the FAT if needed */

+	}

+#endif

+	if (res != FR_OK) LEAVE_FF(fs, res);

+

+#if FF_USE_FASTSEEK

+	if (fp->cltbl) {	/* Fast seek */

+		if (ofs == CREATE_LINKMAP) {	/* Create CLMT */

+			tbl = fp->cltbl;

+			tlen = *tbl++; ulen = 2;	/* Given table size and required table size */

+			cl = fp->obj.sclust;		/* Origin of the chain */

+			if (cl != 0) {

+				do {

+					/* Get a fragment */

+					tcl = cl; ncl = 0; ulen += 2;	/* Top, length and used items */

+					do {

+						pcl = cl; ncl++;

+						cl = get_fat(&fp->obj, cl);

+						if (cl <= 1) ABORT(fs, FR_INT_ERR);

+						if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+					} while (cl == pcl + 1);

+					if (ulen <= tlen) {		/* Store the length and top of the fragment */

+						*tbl++ = ncl; *tbl++ = tcl;

+					}

+				} while (cl < fs->n_fatent);	/* Repeat until end of chain */

+			}

+			*fp->cltbl = ulen;	/* Number of items used */

+			if (ulen <= tlen) {

+				*tbl = 0;		/* Terminate table */

+			} else {

+				res = FR_NOT_ENOUGH_CORE;	/* Given table size is smaller than required */

+			}

+		} else {						/* Fast seek */

+			if (ofs > fp->obj.objsize) ofs = fp->obj.objsize;	/* Clip offset at the file size */

+			fp->fptr = ofs;				/* Set file pointer */

+			if (ofs > 0) {

+				fp->clust = clmt_clust(fp, ofs - 1);

+				dsc = clst2sect(fs, fp->clust);

+				if (dsc == 0) ABORT(fs, FR_INT_ERR);

+				dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);

+				if (fp->fptr % SS(fs) && dsc != fp->sect) {	/* Refill sector cache if needed */

+#if !FF_FS_TINY

+#if !FF_FS_READONLY

+					if (fp->flag & FA_DIRTY) {		/* Write-back dirty sector cache */

+						if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+						fp->flag &= (BYTE)~FA_DIRTY;

+					}

+#endif

+					if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);	/* Load current sector */

+#endif

+					fp->sect = dsc;

+				}

+			}

+		}

+	} else

+#endif

+

+	/* Normal Seek */

+	{

+#if FF_FS_EXFAT

+		if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF;	/* Clip at 4 GiB - 1 if at FATxx */

+#endif

+		if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) {	/* In read-only mode, clip offset with the file size */

+			ofs = fp->obj.objsize;

+		}

+		ifptr = fp->fptr;

+		fp->fptr = nsect = 0;

+		if (ofs > 0) {

+			bcs = (DWORD)fs->csize * SS(fs);	/* Cluster size (byte) */

+			if (ifptr > 0 &&

+				(ofs - 1) / bcs >= (ifptr - 1) / bcs) {	/* When seek to same or following cluster, */

+				fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1);	/* start from the current cluster */

+				ofs -= fp->fptr;

+				clst = fp->clust;

+			} else {									/* When seek to back cluster, */

+				clst = fp->obj.sclust;					/* start from the first cluster */

+#if !FF_FS_READONLY

+				if (clst == 0) {						/* If no cluster chain, create a new chain */

+					clst = create_chain(&fp->obj, 0);

+					if (clst == 1) ABORT(fs, FR_INT_ERR);

+					if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+					fp->obj.sclust = clst;

+				}

+#endif

+				fp->clust = clst;

+			}

+			if (clst != 0) {

+				while (ofs > bcs) {						/* Cluster following loop */

+					ofs -= bcs; fp->fptr += bcs;

+#if !FF_FS_READONLY

+					if (fp->flag & FA_WRITE) {			/* Check if in write mode or not */

+						if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) {	/* No FAT chain object needs correct objsize to generate FAT value */

+							fp->obj.objsize = fp->fptr;

+							fp->flag |= FA_MODIFIED;

+						}

+						clst = create_chain(&fp->obj, clst);	/* Follow chain with forceed stretch */

+						if (clst == 0) {				/* Clip file size in case of disk full */

+							ofs = 0; break;

+						}

+					} else

+#endif

+					{

+						clst = get_fat(&fp->obj, clst);	/* Follow cluster chain if not in write mode */

+					}

+					if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+					if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);

+					fp->clust = clst;

+				}

+				fp->fptr += ofs;

+				if (ofs % SS(fs)) {

+					nsect = clst2sect(fs, clst);	/* Current sector */

+					if (nsect == 0) ABORT(fs, FR_INT_ERR);

+					nsect += (DWORD)(ofs / SS(fs));

+				}

+			}

+		}

+		if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) {	/* Set file change flag if the file size is extended */

+			fp->obj.objsize = fp->fptr;

+			fp->flag |= FA_MODIFIED;

+		}

+		if (fp->fptr % SS(fs) && nsect != fp->sect) {	/* Fill sector cache if needed */

+#if !FF_FS_TINY

+#if !FF_FS_READONLY

+			if (fp->flag & FA_DIRTY) {			/* Write-back dirty sector cache */

+				if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);	/* Fill sector cache */

+#endif

+			fp->sect = nsect;

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+#if FF_FS_MINIMIZE <= 1

+/*-----------------------------------------------------------------------*/

+/* Create a Directory Object                                             */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_opendir (

+	DIR* dp,			/* Pointer to directory object to create */

+	const TCHAR* path	/* Pointer to the directory path */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	if (!dp) return FR_INVALID_OBJECT;

+

+	/* Get logical drive */

+	res = mount_volume(&path, &fs, 0);

+	if (res == FR_OK) {

+		dp->obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(dp, path);			/* Follow the path to the directory */

+		if (res == FR_OK) {						/* Follow completed */

+			if (!(dp->fn[NSFLAG] & NS_NONAME)) {	/* It is not the origin directory itself */

+				if (dp->obj.attr & AM_DIR) {		/* This object is a sub-directory */

+#if FF_FS_EXFAT

+					if (fs->fs_type == FS_EXFAT) {

+						dp->obj.c_scl = dp->obj.sclust;							/* Get containing directory inforamation */

+						dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;

+						dp->obj.c_ofs = dp->blk_ofs;

+						init_alloc_info(fs, &dp->obj);	/* Get object allocation info */

+					} else

+#endif

+					{

+						dp->obj.sclust = ld_clust(fs, dp->dir);	/* Get object allocation info */

+					}

+				} else {						/* This object is a file */

+					res = FR_NO_PATH;

+				}

+			}

+			if (res == FR_OK) {

+				dp->obj.id = fs->id;

+				res = dir_sdi(dp, 0);			/* Rewind directory */

+#if FF_FS_LOCK != 0

+				if (res == FR_OK) {

+					if (dp->obj.sclust != 0) {

+						dp->obj.lockid = inc_lock(dp, 0);	/* Lock the sub directory */

+						if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES;

+					} else {

+						dp->obj.lockid = 0;	/* Root directory need not to be locked */

+					}

+				}

+#endif

+			}

+		}

+		FREE_NAMBUF();

+		if (res == FR_NO_FILE) res = FR_NO_PATH;

+	}

+	if (res != FR_OK) dp->obj.fs = 0;		/* Invalidate the directory object if function faild */

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Close Directory                                                       */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_closedir (

+	DIR *dp		/* Pointer to the directory object to be closed */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+

+

+	res = validate(&dp->obj, &fs);	/* Check validity of the file object */

+	if (res == FR_OK) {

+#if FF_FS_LOCK != 0

+		if (dp->obj.lockid) res = dec_lock(dp->obj.lockid);	/* Decrement sub-directory open counter */

+		if (res == FR_OK) dp->obj.fs = 0;	/* Invalidate directory object */

+#else

+		dp->obj.fs = 0;	/* Invalidate directory object */

+#endif

+#if FF_FS_REENTRANT

+		unlock_fs(fs, FR_OK);		/* Unlock volume */

+#endif

+	}

+	return res;

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Read Directory Entries in Sequence                                    */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_readdir (

+	DIR* dp,			/* Pointer to the open directory object */

+	FILINFO* fno		/* Pointer to file information to return */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	res = validate(&dp->obj, &fs);	/* Check validity of the directory object */

+	if (res == FR_OK) {

+		if (!fno) {

+			res = dir_sdi(dp, 0);			/* Rewind the directory object */

+		} else {

+			INIT_NAMBUF(fs);

+			res = DIR_READ_FILE(dp);		/* Read an item */

+			if (res == FR_NO_FILE) res = FR_OK;	/* Ignore end of directory */

+			if (res == FR_OK) {				/* A valid entry is found */

+				get_fileinfo(dp, fno);		/* Get the object information */

+				res = dir_next(dp, 0);		/* Increment index for next */

+				if (res == FR_NO_FILE) res = FR_OK;	/* Ignore end of directory now */

+			}

+			FREE_NAMBUF();

+		}

+	}

+	LEAVE_FF(fs, res);

+}

+

+

+

+#if FF_USE_FIND

+/*-----------------------------------------------------------------------*/

+/* Find Next File                                                        */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_findnext (

+	DIR* dp,		/* Pointer to the open directory object */

+	FILINFO* fno	/* Pointer to the file information structure */

+)

+{

+	FRESULT res;

+

+

+	for (;;) {

+		res = f_readdir(dp, fno);		/* Get a directory item */

+		if (res != FR_OK || !fno || !fno->fname[0]) break;	/* Terminate if any error or end of directory */

+		if (pattern_match(dp->pat, fno->fname, 0, FIND_RECURS)) break;		/* Test for the file name */

+#if FF_USE_LFN && FF_USE_FIND == 2

+		if (pattern_match(dp->pat, fno->altname, 0, FIND_RECURS)) break;	/* Test for alternative name if exist */

+#endif

+	}

+	return res;

+}

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Find First File                                                       */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_findfirst (

+	DIR* dp,				/* Pointer to the blank directory object */

+	FILINFO* fno,			/* Pointer to the file information structure */

+	const TCHAR* path,		/* Pointer to the directory to open */

+	const TCHAR* pattern	/* Pointer to the matching pattern */

+)

+{

+	FRESULT res;

+

+

+	dp->pat = pattern;		/* Save pointer to pattern string */

+	res = f_opendir(dp, path);		/* Open the target directory */

+	if (res == FR_OK) {

+		res = f_findnext(dp, fno);	/* Find the first item */

+	}

+	return res;

+}

+

+#endif	/* FF_USE_FIND */

+

+

+

+#if FF_FS_MINIMIZE == 0

+/*-----------------------------------------------------------------------*/

+/* Get File Status                                                       */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_stat (

+	const TCHAR* path,	/* Pointer to the file path */

+	FILINFO* fno		/* Pointer to file information to return */

+)

+{

+	FRESULT res;

+	DIR dj;

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	res = mount_volume(&path, &dj.obj.fs, 0);

+	if (res == FR_OK) {

+		INIT_NAMBUF(dj.obj.fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+		if (res == FR_OK) {				/* Follow completed */

+			if (dj.fn[NSFLAG] & NS_NONAME) {	/* It is origin directory */

+				res = FR_INVALID_NAME;

+			} else {							/* Found an object */

+				if (fno) get_fileinfo(&dj, fno);

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(dj.obj.fs, res);

+}

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Get Number of Free Clusters                                           */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_getfree (

+	const TCHAR* path,	/* Logical drive number */

+	DWORD* nclst,		/* Pointer to a variable to return number of free clusters */

+	FATFS** fatfs		/* Pointer to return pointer to corresponding filesystem object */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD nfree, clst, stat;

+	LBA_t sect;

+	UINT i;

+	FFOBJID obj;

+

+

+	/* Get logical drive */

+	res = mount_volume(&path, &fs, 0);

+	if (res == FR_OK) {

+		*fatfs = fs;				/* Return ptr to the fs object */

+		/* If free_clst is valid, return it without full FAT scan */

+		if (fs->free_clst <= fs->n_fatent - 2) {

+			*nclst = fs->free_clst;

+		} else {

+			/* Scan FAT to obtain number of free clusters */

+			nfree = 0;

+			if (fs->fs_type == FS_FAT12) {	/* FAT12: Scan bit field FAT entries */

+				clst = 2; obj.fs = fs;

+				do {

+					stat = get_fat(&obj, clst);

+					if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }

+					if (stat == 1) { res = FR_INT_ERR; break; }

+					if (stat == 0) nfree++;

+				} while (++clst < fs->n_fatent);

+			} else {

+#if FF_FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {	/* exFAT: Scan allocation bitmap */

+					BYTE bm;

+					UINT b;

+

+					clst = fs->n_fatent - 2;	/* Number of clusters */

+					sect = fs->bitbase;			/* Bitmap sector */

+					i = 0;						/* Offset in the sector */

+					do {	/* Counts numbuer of bits with zero in the bitmap */

+						if (i == 0) {

+							res = move_window(fs, sect++);

+							if (res != FR_OK) break;

+						}

+						for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {

+							if (!(bm & 1)) nfree++;

+							bm >>= 1;

+						}

+						i = (i + 1) % SS(fs);

+					} while (clst);

+				} else

+#endif

+				{	/* FAT16/32: Scan WORD/DWORD FAT entries */

+					clst = fs->n_fatent;	/* Number of entries */

+					sect = fs->fatbase;		/* Top of the FAT */

+					i = 0;					/* Offset in the sector */

+					do {	/* Counts numbuer of entries with zero in the FAT */

+						if (i == 0) {

+							res = move_window(fs, sect++);

+							if (res != FR_OK) break;

+						}

+						if (fs->fs_type == FS_FAT16) {

+							if (ld_word(fs->win + i) == 0) nfree++;

+							i += 2;

+						} else {

+							if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++;

+							i += 4;

+						}

+						i %= SS(fs);

+					} while (--clst);

+				}

+			}

+			if (res == FR_OK) {		/* Update parameters if succeeded */

+				*nclst = nfree;			/* Return the free clusters */

+				fs->free_clst = nfree;	/* Now free_clst is valid */

+				fs->fsi_flag |= 1;		/* FAT32: FSInfo is to be updated */

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Truncate File                                                         */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_truncate (

+	FIL* fp		/* Pointer to the file object */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD ncl;

+

+

+	res = validate(&fp->obj, &fs);	/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);

+	if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);	/* Check access mode */

+

+	if (fp->fptr < fp->obj.objsize) {	/* Process when fptr is not on the eof */

+		if (fp->fptr == 0) {	/* When set file size to zero, remove entire cluster chain */

+			res = remove_chain(&fp->obj, fp->obj.sclust, 0);

+			fp->obj.sclust = 0;

+		} else {				/* When truncate a part of the file, remove remaining clusters */

+			ncl = get_fat(&fp->obj, fp->clust);

+			res = FR_OK;

+			if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;

+			if (ncl == 1) res = FR_INT_ERR;

+			if (res == FR_OK && ncl < fs->n_fatent) {

+				res = remove_chain(&fp->obj, ncl, fp->clust);

+			}

+		}

+		fp->obj.objsize = fp->fptr;	/* Set file size to current read/write point */

+		fp->flag |= FA_MODIFIED;

+#if !FF_FS_TINY

+		if (res == FR_OK && (fp->flag & FA_DIRTY)) {

+			if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) {

+				res = FR_DISK_ERR;

+			} else {

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+		}

+#endif

+		if (res != FR_OK) ABORT(fs, res);

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Delete a File/Directory                                               */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_unlink (

+	const TCHAR* path		/* Pointer to the file or directory path */

+)

+{

+	FRESULT res;

+	DIR dj, sdj;

+	DWORD dclst = 0;

+	FATFS *fs;

+#if FF_FS_EXFAT

+	FFOBJID obj;

+#endif

+	DEF_NAMBUF

+

+

+	/* Get logical drive */

+	res = mount_volume(&path, &fs, FA_WRITE);

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);		/* Follow the file path */

+		if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {

+			res = FR_INVALID_NAME;			/* Cannot remove dot entry */

+		}

+#if FF_FS_LOCK != 0

+		if (res == FR_OK) res = chk_lock(&dj, 2);	/* Check if it is an open object */

+#endif

+		if (res == FR_OK) {					/* The object is accessible */

+			if (dj.fn[NSFLAG] & NS_NONAME) {

+				res = FR_INVALID_NAME;		/* Cannot remove the origin directory */

+			} else {

+				if (dj.obj.attr & AM_RDO) {

+					res = FR_DENIED;		/* Cannot remove R/O object */

+				}

+			}

+			if (res == FR_OK) {

+#if FF_FS_EXFAT

+				obj.fs = fs;

+				if (fs->fs_type == FS_EXFAT) {

+					init_alloc_info(fs, &obj);

+					dclst = obj.sclust;

+				} else

+#endif

+				{

+					dclst = ld_clust(fs, dj.dir);

+				}

+				if (dj.obj.attr & AM_DIR) {			/* Is it a sub-directory? */

+#if FF_FS_RPATH != 0

+					if (dclst == fs->cdir) {	 	/* Is it the current directory? */

+						res = FR_DENIED;

+					} else

+#endif

+					{

+						sdj.obj.fs = fs;			/* Open the sub-directory */

+						sdj.obj.sclust = dclst;

+#if FF_FS_EXFAT

+						if (fs->fs_type == FS_EXFAT) {

+							sdj.obj.objsize = obj.objsize;

+							sdj.obj.stat = obj.stat;

+						}

+#endif

+						res = dir_sdi(&sdj, 0);

+						if (res == FR_OK) {

+							res = DIR_READ_FILE(&sdj);			/* Test if the directory is empty */

+							if (res == FR_OK) res = FR_DENIED;	/* Not empty? */

+							if (res == FR_NO_FILE) res = FR_OK;	/* Empty? */

+						}

+					}

+				}

+			}

+			if (res == FR_OK) {

+				res = dir_remove(&dj);			/* Remove the directory entry */

+				if (res == FR_OK && dclst != 0) {	/* Remove the cluster chain if exist */

+#if FF_FS_EXFAT

+					res = remove_chain(&obj, dclst, 0);

+#else

+					res = remove_chain(&dj.obj, dclst, 0);

+#endif

+				}

+				if (res == FR_OK) res = sync_fs(fs);

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Create a Directory                                                    */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_mkdir (

+	const TCHAR* path		/* Pointer to the directory path */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FFOBJID sobj;

+	FATFS *fs;

+	DWORD dcl, pcl, tm;

+	DEF_NAMBUF

+

+

+	res = mount_volume(&path, &fs, FA_WRITE);	/* Get logical drive */

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);			/* Follow the file path */

+		if (res == FR_OK) res = FR_EXIST;		/* Name collision? */

+		if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) {	/* Invalid name? */

+			res = FR_INVALID_NAME;

+		}

+		if (res == FR_NO_FILE) {				/* It is clear to create a new directory */

+			sobj.fs = fs;						/* New object id to create a new chain */

+			dcl = create_chain(&sobj, 0);		/* Allocate a cluster for the new directory */

+			res = FR_OK;

+			if (dcl == 0) res = FR_DENIED;		/* No space to allocate a new cluster? */

+			if (dcl == 1) res = FR_INT_ERR;		/* Any insanity? */

+			if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;	/* Disk error? */

+			tm = GET_FATTIME();

+			if (res == FR_OK) {

+				res = dir_clear(fs, dcl);		/* Clean up the new table */

+				if (res == FR_OK) {

+					if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {	/* Create dot entries (FAT only) */

+						memset(fs->win + DIR_Name, ' ', 11);	/* Create "." entry */

+						fs->win[DIR_Name] = '.';

+						fs->win[DIR_Attr] = AM_DIR;

+						st_dword(fs->win + DIR_ModTime, tm);

+						st_clust(fs, fs->win, dcl);

+						memcpy(fs->win + SZDIRE, fs->win, SZDIRE);	/* Create ".." entry */

+						fs->win[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;

+						st_clust(fs, fs->win + SZDIRE, pcl);

+						fs->wflag = 1;

+					}

+					res = dir_register(&dj);	/* Register the object to the parent directoy */

+				}

+			}

+			if (res == FR_OK) {

+#if FF_FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {	/* Initialize directory entry block */

+					st_dword(fs->dirbuf + XDIR_ModTime, tm);	/* Created time */

+					st_dword(fs->dirbuf + XDIR_FstClus, dcl);	/* Table start cluster */

+					st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)fs->csize * SS(fs));	/* Directory size needs to be valid */

+					st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)fs->csize * SS(fs));

+					fs->dirbuf[XDIR_GenFlags] = 3;				/* Initialize the object flag */

+					fs->dirbuf[XDIR_Attr] = AM_DIR;				/* Attribute */

+					res = store_xdir(&dj);

+				} else

+#endif

+				{

+					st_dword(dj.dir + DIR_ModTime, tm);	/* Created time */

+					st_clust(fs, dj.dir, dcl);			/* Table start cluster */

+					dj.dir[DIR_Attr] = AM_DIR;			/* Attribute */

+					fs->wflag = 1;

+				}

+				if (res == FR_OK) {

+					res = sync_fs(fs);

+				}

+			} else {

+				remove_chain(&sobj, dcl, 0);		/* Could not register, remove the allocated cluster */

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Rename a File/Directory                                               */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_rename (

+	const TCHAR* path_old,	/* Pointer to the object name to be renamed */

+	const TCHAR* path_new	/* Pointer to the new name */

+)

+{

+	FRESULT res;

+	DIR djo, djn;

+	FATFS *fs;

+	BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir;

+	LBA_t sect;

+	DEF_NAMBUF

+

+

+	get_ldnumber(&path_new);						/* Snip the drive number of new name off */

+	res = mount_volume(&path_old, &fs, FA_WRITE);	/* Get logical drive of the old object */

+	if (res == FR_OK) {

+		djo.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&djo, path_old);			/* Check old object */

+		if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;	/* Check validity of name */

+#if FF_FS_LOCK != 0

+		if (res == FR_OK) {

+			res = chk_lock(&djo, 2);

+		}

+#endif

+		if (res == FR_OK) {					/* Object to be renamed is found */

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {	/* At exFAT volume */

+				BYTE nf, nn;

+				WORD nh;

+

+				memcpy(buf, fs->dirbuf, SZDIRE * 2);	/* Save 85+C0 entry of old object */

+				memcpy(&djn, &djo, sizeof djo);

+				res = follow_path(&djn, path_new);		/* Make sure if new object name is not in use */

+				if (res == FR_OK) {						/* Is new name already in use by any other object? */

+					res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;

+				}

+				if (res == FR_NO_FILE) { 				/* It is a valid path and no name collision */

+					res = dir_register(&djn);			/* Register the new entry */

+					if (res == FR_OK) {

+						nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];

+						nh = ld_word(fs->dirbuf + XDIR_NameHash);

+						memcpy(fs->dirbuf, buf, SZDIRE * 2);	/* Restore 85+C0 entry */

+						fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;

+						st_word(fs->dirbuf + XDIR_NameHash, nh);

+						if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC;	/* Set archive attribute if it is a file */

+/* Start of critical section where an interruption can cause a cross-link */

+						res = store_xdir(&djn);

+					}

+				}

+			} else

+#endif

+			{	/* At FAT/FAT32 volume */

+				memcpy(buf, djo.dir, SZDIRE);			/* Save directory entry of the object */

+				memcpy(&djn, &djo, sizeof (DIR));		/* Duplicate the directory object */

+				res = follow_path(&djn, path_new);		/* Make sure if new object name is not in use */

+				if (res == FR_OK) {						/* Is new name already in use by any other object? */

+					res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;

+				}

+				if (res == FR_NO_FILE) { 				/* It is a valid path and no name collision */

+					res = dir_register(&djn);			/* Register the new entry */

+					if (res == FR_OK) {

+						dir = djn.dir;					/* Copy directory entry of the object except name */

+						memcpy(dir + 13, buf + 13, SZDIRE - 13);

+						dir[DIR_Attr] = buf[DIR_Attr];

+						if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC;	/* Set archive attribute if it is a file */

+						fs->wflag = 1;

+						if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) {	/* Update .. entry in the sub-directory if needed */

+							sect = clst2sect(fs, ld_clust(fs, dir));

+							if (sect == 0) {

+								res = FR_INT_ERR;

+							} else {

+/* Start of critical section where an interruption can cause a cross-link */

+								res = move_window(fs, sect);

+								dir = fs->win + SZDIRE * 1;	/* Ptr to .. entry */

+								if (res == FR_OK && dir[1] == '.') {

+									st_clust(fs, dir, djn.obj.sclust);

+									fs->wflag = 1;

+								}

+							}

+						}

+					}

+				}

+			}

+			if (res == FR_OK) {

+				res = dir_remove(&djo);		/* Remove old entry */

+				if (res == FR_OK) {

+					res = sync_fs(fs);

+				}

+			}

+/* End of the critical section */

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* !FF_FS_READONLY */

+#endif /* FF_FS_MINIMIZE == 0 */

+#endif /* FF_FS_MINIMIZE <= 1 */

+#endif /* FF_FS_MINIMIZE <= 2 */

+

+

+

+#if FF_USE_CHMOD && !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Change Attribute                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_chmod (

+	const TCHAR* path,	/* Pointer to the file path */

+	BYTE attr,			/* Attribute bits */

+	BYTE mask			/* Attribute mask to change */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	res = mount_volume(&path, &fs, FA_WRITE);	/* Get logical drive */

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+		if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;	/* Check object validity */

+		if (res == FR_OK) {

+			mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;	/* Valid attribute mask */

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask);	/* Apply attribute change */

+				res = store_xdir(&dj);

+			} else

+#endif

+			{

+				dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask);	/* Apply attribute change */

+				fs->wflag = 1;

+			}

+			if (res == FR_OK) {

+				res = sync_fs(fs);

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Change Timestamp                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_utime (

+	const TCHAR* path,	/* Pointer to the file/directory name */

+	const FILINFO* fno	/* Pointer to the timestamp to be set */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	DEF_NAMBUF

+

+

+	res = mount_volume(&path, &fs, FA_WRITE);	/* Get logical drive */

+	if (res == FR_OK) {

+		dj.obj.fs = fs;

+		INIT_NAMBUF(fs);

+		res = follow_path(&dj, path);	/* Follow the file path */

+		if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME;	/* Check object validity */

+		if (res == FR_OK) {

+#if FF_FS_EXFAT

+			if (fs->fs_type == FS_EXFAT) {

+				st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);

+				res = store_xdir(&dj);

+			} else

+#endif

+			{

+				st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);

+				fs->wflag = 1;

+			}

+			if (res == FR_OK) {

+				res = sync_fs(fs);

+			}

+		}

+		FREE_NAMBUF();

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif	/* FF_USE_CHMOD && !FF_FS_READONLY */

+

+

+

+#if FF_USE_LABEL

+/*-----------------------------------------------------------------------*/

+/* Get Volume Label                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_getlabel (

+	const TCHAR* path,	/* Logical drive number */

+	TCHAR* label,		/* Buffer to store the volume label */

+	DWORD* vsn			/* Variable to store the volume serial number */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	UINT si, di;

+	WCHAR wc;

+

+	/* Get logical drive */

+	res = mount_volume(&path, &fs, 0);

+

+	/* Get volume label */

+	if (res == FR_OK && label) {

+		dj.obj.fs = fs; dj.obj.sclust = 0;	/* Open root directory */

+		res = dir_sdi(&dj, 0);

+		if (res == FR_OK) {

+		 	res = DIR_READ_LABEL(&dj);		/* Find a volume label entry */

+		 	if (res == FR_OK) {

+#if FF_FS_EXFAT

+				if (fs->fs_type == FS_EXFAT) {

+					WCHAR hs;

+					UINT nw;

+

+					for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) {	/* Extract volume label from 83 entry */

+						wc = ld_word(dj.dir + XDIR_Label + si * 2);

+						if (hs == 0 && IsSurrogate(wc)) {	/* Is the code a surrogate? */

+							hs = wc; continue;

+						}

+						nw = put_utf((DWORD)hs << 16 | wc, &label[di], 4);	/* Store it in API encoding */

+						if (nw == 0) { di = 0; break; }		/* Encode error? */

+						di += nw;

+						hs = 0;

+					}

+					if (hs != 0) di = 0;	/* Broken surrogate pair? */

+					label[di] = 0;

+				} else

+#endif

+				{

+					si = di = 0;		/* Extract volume label from AM_VOL entry */

+					while (si < 11) {

+						wc = dj.dir[si++];

+#if FF_USE_LFN && FF_LFN_UNICODE >= 1 	/* Unicode output */

+						if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++];	/* Is it a DBC? */

+						wc = ff_oem2uni(wc, CODEPAGE);		/* Convert it into Unicode */

+						if (wc == 0) { di = 0; break; }		/* Invalid char in current code page? */

+						di += put_utf(wc, &label[di], 4);	/* Store it in Unicode */

+#else									/* ANSI/OEM output */

+						label[di++] = (TCHAR)wc;

+#endif

+					}

+					do {				/* Truncate trailing spaces */

+						label[di] = 0;

+						if (di == 0) break;

+					} while (label[--di] == ' ');

+				}

+			}

+		}

+		if (res == FR_NO_FILE) {	/* No label entry and return nul string */

+			label[0] = 0;

+			res = FR_OK;

+		}

+	}

+

+	/* Get volume serial number */

+	if (res == FR_OK && vsn) {

+		res = move_window(fs, fs->volbase);

+		if (res == FR_OK) {

+			switch (fs->fs_type) {

+			case FS_EXFAT:

+				di = BPB_VolIDEx;

+				break;

+

+			case FS_FAT32:

+				di = BS_VolID32;

+				break;

+

+			default:

+				di = BS_VolID;

+			}

+			*vsn = ld_dword(fs->win + di);

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+

+

+#if !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Set Volume Label                                                      */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_setlabel (

+	const TCHAR* label	/* Volume label to set with heading logical drive number */

+)

+{

+	FRESULT res;

+	DIR dj;

+	FATFS *fs;

+	BYTE dirvn[22];

+	UINT di;

+	WCHAR wc;

+	static const char badchr[18] = "+.,;=[]" "/*:<>|\\\"\?\x7F";	/* [0..16] for FAT, [7..16] for exFAT */

+#if FF_USE_LFN

+	DWORD dc;

+#endif

+

+	/* Get logical drive */

+	res = mount_volume(&label, &fs, FA_WRITE);

+	if (res != FR_OK) LEAVE_FF(fs, res);

+

+#if FF_FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {	/* On the exFAT volume */

+		memset(dirvn, 0, 22);

+		di = 0;

+		while ((UINT)*label >= ' ') {	/* Create volume label */

+			dc = tchar2uni(&label);	/* Get a Unicode character */

+			if (dc >= 0x10000) {

+				if (dc == 0xFFFFFFFF || di >= 10) {	/* Wrong surrogate or buffer overflow */

+					dc = 0;

+				} else {

+					st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++;

+				}

+			}

+			if (dc == 0 || strchr(&badchr[7], (int)dc) || di >= 11) {	/* Check validity of the volume label */

+				LEAVE_FF(fs, FR_INVALID_NAME);

+			}

+			st_word(dirvn + di * 2, (WCHAR)dc); di++;

+		}

+	} else

+#endif

+	{	/* On the FAT/FAT32 volume */

+		memset(dirvn, ' ', 11);

+		di = 0;

+		while ((UINT)*label >= ' ') {	/* Create volume label */

+#if FF_USE_LFN

+			dc = tchar2uni(&label);

+			wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0;

+#else									/* ANSI/OEM input */

+			wc = (BYTE)*label++;

+			if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0;

+			if (IsLower(wc)) wc -= 0x20;		/* To upper ASCII characters */

+#if FF_CODE_PAGE == 0

+			if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80];	/* To upper extended characters (SBCS cfg) */

+#elif FF_CODE_PAGE < 900

+			if (wc >= 0x80) wc = ExCvt[wc - 0x80];	/* To upper extended characters (SBCS cfg) */

+#endif

+#endif

+			if (wc == 0 || strchr(&badchr[0], (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) {	/* Reject invalid characters for volume label */

+				LEAVE_FF(fs, FR_INVALID_NAME);

+			}

+			if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8);

+			dirvn[di++] = (BYTE)wc;

+		}

+		if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME);	/* Reject illegal name (heading DDEM) */

+		while (di && dirvn[di - 1] == ' ') di--;				/* Snip trailing spaces */

+	}

+

+	/* Set volume label */

+	dj.obj.fs = fs; dj.obj.sclust = 0;	/* Open root directory */

+	res = dir_sdi(&dj, 0);

+	if (res == FR_OK) {

+		res = DIR_READ_LABEL(&dj);	/* Get volume label entry */

+		if (res == FR_OK) {

+			if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {

+				dj.dir[XDIR_NumLabel] = (BYTE)di;	/* Change the volume label */

+				memcpy(dj.dir + XDIR_Label, dirvn, 22);

+			} else {

+				if (di != 0) {

+					memcpy(dj.dir, dirvn, 11);	/* Change the volume label */

+				} else {

+					dj.dir[DIR_Name] = DDEM;	/* Remove the volume label */

+				}

+			}

+			fs->wflag = 1;

+			res = sync_fs(fs);

+		} else {			/* No volume label entry or an error */

+			if (res == FR_NO_FILE) {

+				res = FR_OK;

+				if (di != 0) {	/* Create a volume label entry */

+					res = dir_alloc(&dj, 1);	/* Allocate an entry */

+					if (res == FR_OK) {

+						memset(dj.dir, 0, SZDIRE);	/* Clean the entry */

+						if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {

+							dj.dir[XDIR_Type] = ET_VLABEL;	/* Create volume label entry */

+							dj.dir[XDIR_NumLabel] = (BYTE)di;

+							memcpy(dj.dir + XDIR_Label, dirvn, 22);

+						} else {

+							dj.dir[DIR_Attr] = AM_VOL;		/* Create volume label entry */

+							memcpy(dj.dir, dirvn, 11);

+						}

+						fs->wflag = 1;

+						res = sync_fs(fs);

+					}

+				}

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* !FF_FS_READONLY */

+#endif /* FF_USE_LABEL */

+

+

+

+#if FF_USE_EXPAND && !FF_FS_READONLY

+/*-----------------------------------------------------------------------*/

+/* Allocate a Contiguous Blocks to the File                              */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_expand (

+	FIL* fp,		/* Pointer to the file object */

+	FSIZE_t fsz,	/* File size to be expanded to */

+	BYTE opt		/* Operation mode 0:Find and prepare or 1:Find and allocate */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD n, clst, stcl, scl, ncl, tcl, lclst;

+

+

+	res = validate(&fp->obj, &fs);		/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);

+	if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);

+#if FF_FS_EXFAT

+	if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED);	/* Check if in size limit */

+#endif

+	n = (DWORD)fs->csize * SS(fs);	/* Cluster size */

+	tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0);	/* Number of clusters required */

+	stcl = fs->last_clst; lclst = 0;

+	if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;

+

+#if FF_FS_EXFAT

+	if (fs->fs_type == FS_EXFAT) {

+		scl = find_bitmap(fs, stcl, tcl);			/* Find a contiguous cluster block */

+		if (scl == 0) res = FR_DENIED;				/* No contiguous cluster block was found */

+		if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;

+		if (res == FR_OK) {	/* A contiguous free area is found */

+			if (opt) {		/* Allocate it now */

+				res = change_bitmap(fs, scl, tcl, 1);	/* Mark the cluster block 'in use' */

+				lclst = scl + tcl - 1;

+			} else {		/* Set it as suggested point for next allocation */

+				lclst = scl - 1;

+			}

+		}

+	} else

+#endif

+	{

+		scl = clst = stcl; ncl = 0;

+		for (;;) {	/* Find a contiguous cluster block */

+			n = get_fat(&fp->obj, clst);

+			if (++clst >= fs->n_fatent) clst = 2;

+			if (n == 1) { res = FR_INT_ERR; break; }

+			if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }

+			if (n == 0) {	/* Is it a free cluster? */

+				if (++ncl == tcl) break;	/* Break if a contiguous cluster block is found */

+			} else {

+				scl = clst; ncl = 0;		/* Not a free cluster */

+			}

+			if (clst == stcl) { res = FR_DENIED; break; }	/* No contiguous cluster? */

+		}

+		if (res == FR_OK) {	/* A contiguous free area is found */

+			if (opt) {		/* Allocate it now */

+				for (clst = scl, n = tcl; n; clst++, n--) {	/* Create a cluster chain on the FAT */

+					res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);

+					if (res != FR_OK) break;

+					lclst = clst;

+				}

+			} else {		/* Set it as suggested point for next allocation */

+				lclst = scl - 1;

+			}

+		}

+	}

+

+	if (res == FR_OK) {

+		fs->last_clst = lclst;		/* Set suggested start cluster to start next */

+		if (opt) {	/* Is it allocated now? */

+			fp->obj.sclust = scl;		/* Update object allocation information */

+			fp->obj.objsize = fsz;

+			if (FF_FS_EXFAT) fp->obj.stat = 2;	/* Set status 'contiguous chain' */

+			fp->flag |= FA_MODIFIED;

+			if (fs->free_clst <= fs->n_fatent - 2) {	/* Update FSINFO */

+				fs->free_clst -= tcl;

+				fs->fsi_flag |= 1;

+			}

+		}

+	}

+

+	LEAVE_FF(fs, res);

+}

+

+#endif /* FF_USE_EXPAND && !FF_FS_READONLY */

+

+

+

+#if FF_USE_FORWARD

+/*-----------------------------------------------------------------------*/

+/* Forward Data to the Stream Directly                                   */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_forward (

+	FIL* fp, 						/* Pointer to the file object */

+	UINT (*func)(const BYTE*,UINT),	/* Pointer to the streaming function */

+	UINT btf,						/* Number of bytes to forward */

+	UINT* bf						/* Pointer to number of bytes forwarded */

+)

+{

+	FRESULT res;

+	FATFS *fs;

+	DWORD clst;

+	LBA_t sect;

+	FSIZE_t remain;

+	UINT rcnt, csect;

+	BYTE *dbuf;

+

+

+	*bf = 0;	/* Clear transfer byte counter */

+	res = validate(&fp->obj, &fs);		/* Check validity of the file object */

+	if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);

+	if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED);	/* Check access mode */

+

+	remain = fp->obj.objsize - fp->fptr;

+	if (btf > remain) btf = (UINT)remain;			/* Truncate btf by remaining bytes */

+

+	for ( ; btf > 0 && (*func)(0, 0); fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {	/* Repeat until all data transferred or stream goes busy */

+		csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1));	/* Sector offset in the cluster */

+		if (fp->fptr % SS(fs) == 0) {				/* On the sector boundary? */

+			if (csect == 0) {						/* On the cluster boundary? */

+				clst = (fp->fptr == 0) ?			/* On the top of the file? */

+					fp->obj.sclust : get_fat(&fp->obj, fp->clust);

+				if (clst <= 1) ABORT(fs, FR_INT_ERR);

+				if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);

+				fp->clust = clst;					/* Update current cluster */

+			}

+		}

+		sect = clst2sect(fs, fp->clust);			/* Get current data sector */

+		if (sect == 0) ABORT(fs, FR_INT_ERR);

+		sect += csect;

+#if FF_FS_TINY

+		if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR);	/* Move sector window to the file data */

+		dbuf = fs->win;

+#else

+		if (fp->sect != sect) {		/* Fill sector cache with file data */

+#if !FF_FS_READONLY

+			if (fp->flag & FA_DIRTY) {		/* Write-back dirty sector cache */

+				if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+				fp->flag &= (BYTE)~FA_DIRTY;

+			}

+#endif

+			if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);

+		}

+		dbuf = fp->buf;

+#endif

+		fp->sect = sect;

+		rcnt = SS(fs) - (UINT)fp->fptr % SS(fs);	/* Number of bytes remains in the sector */

+		if (rcnt > btf) rcnt = btf;					/* Clip it by btr if needed */

+		rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt);	/* Forward the file data */

+		if (rcnt == 0) ABORT(fs, FR_INT_ERR);

+	}

+

+	LEAVE_FF(fs, FR_OK);

+}

+#endif /* FF_USE_FORWARD */

+

+

+

+#if !FF_FS_READONLY && FF_USE_MKFS

+/*-----------------------------------------------------------------------*/

+/* Create FAT/exFAT volume (with sub-functions)                          */

+/*-----------------------------------------------------------------------*/

+

+#define N_SEC_TRACK 63			/* Sectors per track for determination of drive CHS */

+#define	GPT_ALIGN	0x100000	/* Alignment of partitions in GPT [byte] (>=128KB) */

+#define GPT_ITEMS	128			/* Number of GPT table size (>=128, sector aligned) */

+

+

+/* Create partitions on the physical drive in format of MBR or GPT */

+

+static FRESULT create_partition (

+	BYTE drv,			/* Physical drive number */

+	const LBA_t plst[],	/* Partition list */

+	BYTE sys,			/* System ID (for only MBR, temp setting) */

+	BYTE* buf			/* Working buffer for a sector */

+)

+{

+	UINT i, cy;

+	LBA_t sz_drv;

+	DWORD sz_drv32, nxt_alloc32, sz_part32;

+	BYTE *pte;

+	BYTE hd, n_hd, sc, n_sc;

+

+	/* Get physical drive size */

+	if (disk_ioctl(drv, GET_SECTOR_COUNT, &sz_drv) != RES_OK) return FR_DISK_ERR;

+

+#if FF_LBA64

+	if (sz_drv >= FF_MIN_GPT) {	/* Create partitions in GPT format */

+		WORD ss;

+		UINT sz_ptbl, pi, si, ofs;

+		DWORD bcc, rnd, align;

+		QWORD nxt_alloc, sz_part, sz_pool, top_bpt;

+		static const BYTE gpt_mbr[16] = {0x00, 0x00, 0x02, 0x00, 0xEE, 0xFE, 0xFF, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF};

+

+#if FF_MAX_SS != FF_MIN_SS

+		if (disk_ioctl(drv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;	/* Get sector size */

+		if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;

+#else

+		ss = FF_MAX_SS;

+#endif

+		rnd = (DWORD)sz_drv + GET_FATTIME();	/* Random seed */

+		align = GPT_ALIGN / ss;				/* Partition alignment for GPT [sector] */

+		sz_ptbl = GPT_ITEMS * SZ_GPTE / ss;	/* Size of partition table [sector] */

+		top_bpt = sz_drv - sz_ptbl - 1;		/* Backup partiiton table start sector */

+		nxt_alloc = 2 + sz_ptbl;			/* First allocatable sector */

+		sz_pool = top_bpt - nxt_alloc;		/* Size of allocatable area */

+		bcc = 0xFFFFFFFF; sz_part = 1;

+		pi = si = 0;	/* partition table index, size table index */

+		do {

+			if (pi * SZ_GPTE % ss == 0) memset(buf, 0, ss);	/* Clean the buffer if needed */

+			if (sz_part != 0) {				/* Is the size table not termintated? */

+				nxt_alloc = (nxt_alloc + align - 1) & ((QWORD)0 - align);	/* Align partition start */

+				sz_part = plst[si++];		/* Get a partition size */

+				if (sz_part <= 100) {		/* Is the size in percentage? */

+					sz_part = sz_pool * sz_part / 100;

+					sz_part = (sz_part + align - 1) & ((QWORD)0 - align);	/* Align partition end (only if in percentage) */

+				}

+				if (nxt_alloc + sz_part > top_bpt) {	/* Clip the size at end of the pool */

+					sz_part = (nxt_alloc < top_bpt) ? top_bpt - nxt_alloc : 0;

+				}

+			}

+			if (sz_part != 0) {				/* Add a partition? */

+				ofs = pi * SZ_GPTE % ss;

+				memcpy(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16);	/* Set partition GUID (Microsoft Basic Data) */

+				rnd = make_rand(rnd, buf + ofs + GPTE_UpGuid, 16);	/* Set unique partition GUID */

+				st_qword(buf + ofs + GPTE_FstLba, nxt_alloc);		/* Set partition start sector */

+				st_qword(buf + ofs + GPTE_LstLba, nxt_alloc + sz_part - 1);	/* Set partition end sector */

+				nxt_alloc += sz_part;								/* Next allocatable sector */

+			}

+			if ((pi + 1) * SZ_GPTE % ss == 0) {		/* Write the buffer if it is filled up */

+				for (i = 0; i < ss; bcc = crc32(bcc, buf[i++])) ;	/* Calculate table check sum */

+				if (disk_write(drv, buf, 2 + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR;		/* Write to primary table */

+				if (disk_write(drv, buf, top_bpt + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR;	/* Write to secondary table */

+			}

+		} while (++pi < GPT_ITEMS);

+

+		/* Create primary GPT header */

+		memset(buf, 0, ss);

+		memcpy(buf + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16);	/* Signature, version (1.0) and size (92) */

+		st_dword(buf + GPTH_PtBcc, ~bcc);			/* Table check sum */

+		st_qword(buf + GPTH_CurLba, 1);				/* LBA of this header */

+		st_qword(buf + GPTH_BakLba, sz_drv - 1);	/* LBA of secondary header */

+		st_qword(buf + GPTH_FstLba, 2 + sz_ptbl);	/* LBA of first allocatable sector */

+		st_qword(buf + GPTH_LstLba, top_bpt - 1);	/* LBA of last allocatable sector */

+		st_dword(buf + GPTH_PteSize, SZ_GPTE);		/* Size of a table entry */

+		st_dword(buf + GPTH_PtNum, GPT_ITEMS);		/* Number of table entries */

+		st_dword(buf + GPTH_PtOfs, 2);				/* LBA of this table */

+		rnd = make_rand(rnd, buf + GPTH_DskGuid, 16);	/* Disk GUID */

+		for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ;	/* Calculate header check sum */

+		st_dword(buf + GPTH_Bcc, ~bcc);				/* Header check sum */

+		if (disk_write(drv, buf, 1, 1) != RES_OK) return FR_DISK_ERR;

+

+		/* Create secondary GPT header */

+		st_qword(buf + GPTH_CurLba, sz_drv - 1);	/* LBA of this header */

+		st_qword(buf + GPTH_BakLba, 1);				/* LBA of primary header */

+		st_qword(buf + GPTH_PtOfs, top_bpt);		/* LBA of this table */

+		st_dword(buf + GPTH_Bcc, 0);

+		for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ;	/* Calculate header check sum */

+		st_dword(buf + GPTH_Bcc, ~bcc);				/* Header check sum */

+		if (disk_write(drv, buf, sz_drv - 1, 1) != RES_OK) return FR_DISK_ERR;

+

+		/* Create protective MBR */

+		memset(buf, 0, ss);

+		memcpy(buf + MBR_Table, gpt_mbr, 16);		/* Create a GPT partition */

+		st_word(buf + BS_55AA, 0xAA55);

+		if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;

+

+	} else

+#endif

+	{	/* Create partitions in MBR format */

+		sz_drv32 = (DWORD)sz_drv;

+		n_sc = N_SEC_TRACK;				/* Determine drive CHS without any consideration of the drive geometry */

+		for (n_hd = 8; n_hd != 0 && sz_drv32 / n_hd / n_sc > 1024; n_hd *= 2) ;

+		if (n_hd == 0) n_hd = 255;		/* Number of heads needs to be <256 */

+

+		memset(buf, 0, FF_MAX_SS);		/* Clear MBR */

+		pte = buf + MBR_Table;	/* Partition table in the MBR */

+		for (i = 0, nxt_alloc32 = n_sc; i < 4 && nxt_alloc32 != 0 && nxt_alloc32 < sz_drv32; i++, nxt_alloc32 += sz_part32) {

+			sz_part32 = (DWORD)plst[i];	/* Get partition size */

+			if (sz_part32 <= 100) sz_part32 = (sz_part32 == 100) ? sz_drv32 : sz_drv32 / 100 * sz_part32;	/* Size in percentage? */

+			if (nxt_alloc32 + sz_part32 > sz_drv32 || nxt_alloc32 + sz_part32 < nxt_alloc32) sz_part32 = sz_drv32 - nxt_alloc32;	/* Clip at drive size */

+			if (sz_part32 == 0) break;	/* End of table or no sector to allocate? */

+

+			st_dword(pte + PTE_StLba, nxt_alloc32);	/* Start LBA */

+			st_dword(pte + PTE_SizLba, sz_part32);	/* Number of sectors */

+			pte[PTE_System] = sys;					/* System type */

+

+			cy = (UINT)(nxt_alloc32 / n_sc / n_hd);	/* Start cylinder */

+			hd = (BYTE)(nxt_alloc32 / n_sc % n_hd);	/* Start head */

+			sc = (BYTE)(nxt_alloc32 % n_sc + 1);	/* Start sector */

+			pte[PTE_StHead] = hd;

+			pte[PTE_StSec] = (BYTE)((cy >> 2 & 0xC0) | sc);

+			pte[PTE_StCyl] = (BYTE)cy;

+

+			cy = (UINT)((nxt_alloc32 + sz_part32 - 1) / n_sc / n_hd);	/* End cylinder */

+			hd = (BYTE)((nxt_alloc32 + sz_part32 - 1) / n_sc % n_hd);	/* End head */

+			sc = (BYTE)((nxt_alloc32 + sz_part32 - 1) % n_sc + 1);		/* End sector */

+			pte[PTE_EdHead] = hd;

+			pte[PTE_EdSec] = (BYTE)((cy >> 2 & 0xC0) | sc);

+			pte[PTE_EdCyl] = (BYTE)cy;

+

+			pte += SZ_PTE;		/* Next entry */

+		}

+

+		st_word(buf + BS_55AA, 0xAA55);		/* MBR signature */

+		if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;	/* Write it to the MBR */

+	}

+

+	return FR_OK;

+}

+

+

+

+FRESULT f_mkfs (

+	const TCHAR* path,		/* Logical drive number */

+	const MKFS_PARM* opt,	/* Format options */

+	void* work,				/* Pointer to working buffer (null: use heap memory) */

+	UINT len				/* Size of working buffer [byte] */

+)

+{

+	static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0};	/* Cluster size boundary for FAT volume (4Ks unit) */

+	static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0};	/* Cluster size boundary for FAT32 volume (128Ks unit) */

+	static const MKFS_PARM defopt = {FM_ANY, 0, 0, 0, 0};	/* Default parameter */

+	BYTE fsopt, fsty, sys, *buf, *pte, pdrv, ipart;

+	WORD ss;	/* Sector size */

+	DWORD sz_buf, sz_blk, n_clst, pau, nsect, n, vsn;

+	LBA_t sz_vol, b_vol, b_fat, b_data;		/* Size of volume, Base LBA of volume, fat, data */

+	LBA_t sect, lba[2];

+	DWORD sz_rsv, sz_fat, sz_dir, sz_au;	/* Size of reserved, fat, dir, data, cluster */

+	UINT n_fat, n_root, i;					/* Index, Number of FATs and Number of roor dir entries */

+	int vol;

+	DSTATUS ds;

+	FRESULT fr;

+

+

+	/* Check mounted drive and clear work area */

+	vol = get_ldnumber(&path);					/* Get target logical drive */

+	if (vol < 0) return FR_INVALID_DRIVE;

+	if (FatFs[vol]) FatFs[vol]->fs_type = 0;	/* Clear the fs object if mounted */

+	pdrv = LD2PD(vol);			/* Physical drive */

+	ipart = LD2PT(vol);			/* Partition (0:create as new, 1..:get from partition table) */

+	if (!opt) opt = &defopt;	/* Use default parameter if it is not given */

+

+	/* Get physical drive status (sz_drv, sz_blk, ss) */

+	ds = disk_initialize(pdrv);

+	if (ds & STA_NOINIT) return FR_NOT_READY;

+	if (ds & STA_PROTECT) return FR_WRITE_PROTECTED;

+	sz_blk = opt->align;

+	if (sz_blk == 0 && disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK) sz_blk = 1;

+ 	if (sz_blk == 0 || sz_blk > 0x8000 || (sz_blk & (sz_blk - 1))) sz_blk = 1;

+#if FF_MAX_SS != FF_MIN_SS

+	if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;

+	if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;

+#else

+	ss = FF_MAX_SS;

+#endif

+	/* Options for FAT sub-type and FAT parameters */

+	fsopt = opt->fmt & (FM_ANY | FM_SFD);

+	n_fat = (opt->n_fat >= 1 && opt->n_fat <= 2) ? opt->n_fat : 1;

+	n_root = (opt->n_root >= 1 && opt->n_root <= 32768 && (opt->n_root % (ss / SZDIRE)) == 0) ? opt->n_root : 512;

+	sz_au = (opt->au_size <= 0x1000000 && (opt->au_size & (opt->au_size - 1)) == 0) ? opt->au_size : 0;

+	sz_au /= ss;	/* Byte --> Sector */

+

+	/* Get working buffer */

+	sz_buf = len / ss;		/* Size of working buffer [sector] */

+	if (sz_buf == 0) return FR_NOT_ENOUGH_CORE;

+	buf = (BYTE*)work;		/* Working buffer */

+#if FF_USE_LFN == 3

+	if (!buf) buf = ff_memalloc(sz_buf * ss);	/* Use heap memory for working buffer */

+#endif

+	if (!buf) return FR_NOT_ENOUGH_CORE;

+

+	/* Determine where the volume to be located (b_vol, sz_vol) */

+	b_vol = sz_vol = 0;

+	if (FF_MULTI_PARTITION && ipart != 0) {	/* Is the volume associated with any specific partition? */

+		/* Get partition location from the existing partition table */

+		if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);	/* Load MBR */

+		if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Check if MBR is valid */

+#if FF_LBA64

+		if (buf[MBR_Table + PTE_System] == 0xEE) {	/* GPT protective MBR? */

+			DWORD n_ent, ofs;

+			QWORD pt_lba;

+

+			/* Get the partition location from GPT */

+			if (disk_read(pdrv, buf, 1, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);	/* Load GPT header sector (next to MBR) */

+			if (!test_gpt_header(buf)) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Check if GPT header is valid */

+			n_ent = ld_dword(buf + GPTH_PtNum);		/* Number of entries */

+			pt_lba = ld_qword(buf + GPTH_PtOfs);	/* Table start sector */

+			ofs = i = 0;

+			while (n_ent) {		/* Find MS Basic partition with order of ipart */

+				if (ofs == 0 && disk_read(pdrv, buf, pt_lba++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);	/* Get PT sector */

+				if (!memcmp(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16) && ++i == ipart) {	/* MS basic data partition? */

+					b_vol = ld_qword(buf + ofs + GPTE_FstLba);

+					sz_vol = ld_qword(buf + ofs + GPTE_LstLba) - b_vol + 1;

+					break;

+				}

+				n_ent--; ofs = (ofs + SZ_GPTE) % ss;	/* Next entry */

+			}

+			if (n_ent == 0) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Partition not found */

+			fsopt |= 0x80;	/* Partitioning is in GPT */

+		} else

+#endif

+		{	/* Get the partition location from MBR partition table */

+			pte = buf + (MBR_Table + (ipart - 1) * SZ_PTE);

+			if (ipart > 4 || pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED);	/* No partition? */

+			b_vol = ld_dword(pte + PTE_StLba);		/* Get volume start sector */

+			sz_vol = ld_dword(pte + PTE_SizLba);	/* Get volume size */

+		}

+	} else {	/* The volume is associated with a physical drive */

+		if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+		if (!(fsopt & FM_SFD)) {	/* To be partitioned? */

+			/* Create a single-partition on the drive in this function */

+#if FF_LBA64

+			if (sz_vol >= FF_MIN_GPT) {	/* Which partition type to create, MBR or GPT? */

+				fsopt |= 0x80;		/* Partitioning is in GPT */

+				b_vol = GPT_ALIGN / ss; sz_vol -= b_vol + GPT_ITEMS * SZ_GPTE / ss + 1;	/* Estimated partition offset and size */

+			} else

+#endif

+			{	/* Partitioning is in MBR */

+				if (sz_vol > N_SEC_TRACK) {

+					b_vol = N_SEC_TRACK; sz_vol -= b_vol;	/* Estimated partition offset and size */

+				}

+			}

+		}

+	}

+	if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Check if volume size is >=128s */

+

+	/* Now start to create an FAT volume at b_vol and sz_vol */

+

+	do {	/* Pre-determine the FAT type */

+		if (FF_FS_EXFAT && (fsopt & FM_EXFAT)) {	/* exFAT possible? */

+			if ((fsopt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || sz_au > 128) {	/* exFAT only, vol >= 64MS or sz_au > 128S ? */

+				fsty = FS_EXFAT; break;

+			}

+		}

+#if FF_LBA64

+		if (sz_vol >= 0x100000000) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too large volume for FAT/FAT32 */

+#endif

+		if (sz_au > 128) sz_au = 128;	/* Invalid AU for FAT/FAT32? */

+		if (fsopt & FM_FAT32) {	/* FAT32 possible? */

+			if (!(fsopt & FM_FAT)) {	/* no-FAT? */

+				fsty = FS_FAT32; break;

+			}

+		}

+		if (!(fsopt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER);	/* no-FAT? */

+		fsty = FS_FAT16;

+	} while (0);

+

+	vsn = (DWORD)sz_vol + GET_FATTIME();	/* VSN generated from current time and partitiion size */

+

+#if FF_FS_EXFAT

+	if (fsty == FS_EXFAT) {	/* Create an exFAT volume */

+		DWORD szb_bit, szb_case, sum, nbit, clu, clen[3];

+		WCHAR ch, si;

+		UINT j, st;

+

+		if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too small volume for exFAT? */

+#if FF_USE_TRIM

+		lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1;	/* Inform storage device that the volume area may be erased */

+		disk_ioctl(pdrv, CTRL_TRIM, lba);

+#endif

+		/* Determine FAT location, data location and number of clusters */

+		if (sz_au == 0) {	/* AU auto-selection */

+			sz_au = 8;

+			if (sz_vol >= 0x80000) sz_au = 64;		/* >= 512Ks */

+			if (sz_vol >= 0x4000000) sz_au = 256;	/* >= 64Ms */

+		}

+		b_fat = b_vol + 32;										/* FAT start at offset 32 */

+		sz_fat = (DWORD)((sz_vol / sz_au + 2) * 4 + ss - 1) / ss;	/* Number of FAT sectors */

+		b_data = (b_fat + sz_fat + sz_blk - 1) & ~((LBA_t)sz_blk - 1);	/* Align data area to the erase block boundary */

+		if (b_data - b_vol >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too small volume? */

+		n_clst = (DWORD)(sz_vol - (b_data - b_vol)) / sz_au;	/* Number of clusters */

+		if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED);			/* Too few clusters? */

+		if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too many clusters? */

+

+		szb_bit = (n_clst + 7) / 8;								/* Size of allocation bitmap */

+		clen[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss);	/* Number of allocation bitmap clusters */

+

+		/* Create a compressed up-case table */

+		sect = b_data + sz_au * clen[0];	/* Table start sector */

+		sum = 0;							/* Table checksum to be stored in the 82 entry */

+		st = 0; si = 0; i = 0; j = 0; szb_case = 0;

+		do {

+			switch (st) {

+			case 0:

+				ch = (WCHAR)ff_wtoupper(si);	/* Get an up-case char */

+				if (ch != si) {

+					si++; break;		/* Store the up-case char if exist */

+				}

+				for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ;	/* Get run length of no-case block */

+				if (j >= 128) {

+					ch = 0xFFFF; st = 2; break;	/* Compress the no-case block if run is >= 128 chars */

+				}

+				st = 1;			/* Do not compress short run */

+				/* FALLTHROUGH */

+			case 1:

+				ch = si++;		/* Fill the short run */

+				if (--j == 0) st = 0;

+				break;

+

+			default:

+				ch = (WCHAR)j; si += (WCHAR)j;	/* Number of chars to skip */

+				st = 0;

+			}

+			sum = xsum32(buf[i + 0] = (BYTE)ch, sum);	/* Put it into the write buffer */

+			sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);

+			i += 2; szb_case += 2;

+			if (si == 0 || i == sz_buf * ss) {		/* Write buffered data when buffer full or end of process */

+				n = (i + ss - 1) / ss;

+				if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+				sect += n; i = 0;

+			}

+		} while (si);

+		clen[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss);	/* Number of up-case table clusters */

+		clen[2] = 1;	/* Number of root dir clusters */

+

+		/* Initialize the allocation bitmap */

+		sect = b_data; nsect = (szb_bit + ss - 1) / ss;	/* Start of bitmap and number of bitmap sectors */

+		nbit = clen[0] + clen[1] + clen[2];				/* Number of clusters in-use by system (bitmap, up-case and root-dir) */

+		do {

+			memset(buf, 0, sz_buf * ss);				/* Initialize bitmap buffer */

+			for (i = 0; nbit != 0 && i / 8 < sz_buf * ss; buf[i / 8] |= 1 << (i % 8), i++, nbit--) ;	/* Mark used clusters */

+			n = (nsect > sz_buf) ? sz_buf : nsect;		/* Write the buffered data */

+			if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			sect += n; nsect -= n;

+		} while (nsect);

+

+		/* Initialize the FAT */

+		sect = b_fat; nsect = sz_fat;	/* Start of FAT and number of FAT sectors */

+		j = nbit = clu = 0;

+		do {

+			memset(buf, 0, sz_buf * ss); i = 0;	/* Clear work area and reset write offset */

+			if (clu == 0) {	/* Initialize FAT [0] and FAT[1] */

+				st_dword(buf + i, 0xFFFFFFF8); i += 4; clu++;

+				st_dword(buf + i, 0xFFFFFFFF); i += 4; clu++;

+			}

+			do {			/* Create chains of bitmap, up-case and root dir */

+				while (nbit != 0 && i < sz_buf * ss) {	/* Create a chain */

+					st_dword(buf + i, (nbit > 1) ? clu + 1 : 0xFFFFFFFF);

+					i += 4; clu++; nbit--;

+				}

+				if (nbit == 0 && j < 3) nbit = clen[j++];	/* Get next chain length */

+			} while (nbit != 0 && i < sz_buf * ss);

+			n = (nsect > sz_buf) ? sz_buf : nsect;	/* Write the buffered data */

+			if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			sect += n; nsect -= n;

+		} while (nsect);

+

+		/* Initialize the root directory */

+		memset(buf, 0, sz_buf * ss);

+		buf[SZDIRE * 0 + 0] = ET_VLABEL;				/* Volume label entry (no label) */

+		buf[SZDIRE * 1 + 0] = ET_BITMAP;				/* Bitmap entry */

+		st_dword(buf + SZDIRE * 1 + 20, 2);				/*  cluster */

+		st_dword(buf + SZDIRE * 1 + 24, szb_bit);		/*  size */

+		buf[SZDIRE * 2 + 0] = ET_UPCASE;				/* Up-case table entry */

+		st_dword(buf + SZDIRE * 2 + 4, sum);			/*  sum */

+		st_dword(buf + SZDIRE * 2 + 20, 2 + clen[0]);	/*  cluster */

+		st_dword(buf + SZDIRE * 2 + 24, szb_case);		/*  size */

+		sect = b_data + sz_au * (clen[0] + clen[1]); nsect = sz_au;	/* Start of the root directory and number of sectors */

+		do {	/* Fill root directory sectors */

+			n = (nsect > sz_buf) ? sz_buf : nsect;

+			if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			memset(buf, 0, ss);	/* Rest of entries are filled with zero */

+			sect += n; nsect -= n;

+		} while (nsect);

+

+		/* Create two set of the exFAT VBR blocks */

+		sect = b_vol;

+		for (n = 0; n < 2; n++) {

+			/* Main record (+0) */

+			memset(buf, 0, ss);

+			memcpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT   ", 11);	/* Boot jump code (x86), OEM name */

+			st_qword(buf + BPB_VolOfsEx, b_vol);					/* Volume offset in the physical drive [sector] */

+			st_qword(buf + BPB_TotSecEx, sz_vol);					/* Volume size [sector] */

+			st_dword(buf + BPB_FatOfsEx, (DWORD)(b_fat - b_vol));	/* FAT offset [sector] */

+			st_dword(buf + BPB_FatSzEx, sz_fat);					/* FAT size [sector] */

+			st_dword(buf + BPB_DataOfsEx, (DWORD)(b_data - b_vol));	/* Data offset [sector] */

+			st_dword(buf + BPB_NumClusEx, n_clst);					/* Number of clusters */

+			st_dword(buf + BPB_RootClusEx, 2 + clen[0] + clen[1]);	/* Root dir cluster # */

+			st_dword(buf + BPB_VolIDEx, vsn);						/* VSN */

+			st_word(buf + BPB_FSVerEx, 0x100);						/* Filesystem version (1.00) */

+			for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ;	/* Log2 of sector size [byte] */

+			for (buf[BPB_SecPerClusEx] = 0, i = sz_au; i >>= 1; buf[BPB_SecPerClusEx]++) ;	/* Log2 of cluster size [sector] */

+			buf[BPB_NumFATsEx] = 1;					/* Number of FATs */

+			buf[BPB_DrvNumEx] = 0x80;				/* Drive number (for int13) */

+			st_word(buf + BS_BootCodeEx, 0xFEEB);	/* Boot code (x86) */

+			st_word(buf + BS_55AA, 0xAA55);			/* Signature (placed here regardless of sector size) */

+			for (i = sum = 0; i < ss; i++) {		/* VBR checksum */

+				if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);

+			}

+			if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			/* Extended bootstrap record (+1..+8) */

+			memset(buf, 0, ss);

+			st_word(buf + ss - 2, 0xAA55);	/* Signature (placed at end of sector) */

+			for (j = 1; j < 9; j++) {

+				for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ;	/* VBR checksum */

+				if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			}

+			/* OEM/Reserved record (+9..+10) */

+			memset(buf, 0, ss);

+			for ( ; j < 11; j++) {

+				for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ;	/* VBR checksum */

+				if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			}

+			/* Sum record (+11) */

+			for (i = 0; i < ss; i += 4) st_dword(buf + i, sum);		/* Fill with checksum value */

+			if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+		}

+

+	} else

+#endif	/* FF_FS_EXFAT */

+	{	/* Create an FAT/FAT32 volume */

+		do {

+			pau = sz_au;

+			/* Pre-determine number of clusters and FAT sub-type */

+			if (fsty == FS_FAT32) {	/* FAT32 volume */

+				if (pau == 0) {	/* AU auto-selection */

+					n = (DWORD)sz_vol / 0x20000;	/* Volume size in unit of 128KS */

+					for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ;	/* Get from table */

+				}

+				n_clst = (DWORD)sz_vol / pau;	/* Number of clusters */

+				sz_fat = (n_clst * 4 + 8 + ss - 1) / ss;	/* FAT size [sector] */

+				sz_rsv = 32;	/* Number of reserved sectors */

+				sz_dir = 0;		/* No static directory */

+				if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED);

+			} else {				/* FAT volume */

+				if (pau == 0) {	/* au auto-selection */

+					n = (DWORD)sz_vol / 0x1000;	/* Volume size in unit of 4KS */

+					for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ;	/* Get from table */

+				}

+				n_clst = (DWORD)sz_vol / pau;

+				if (n_clst > MAX_FAT12) {

+					n = n_clst * 2 + 4;		/* FAT size [byte] */

+				} else {

+					fsty = FS_FAT12;

+					n = (n_clst * 3 + 1) / 2 + 3;	/* FAT size [byte] */

+				}

+				sz_fat = (n + ss - 1) / ss;		/* FAT size [sector] */

+				sz_rsv = 1;						/* Number of reserved sectors */

+				sz_dir = (DWORD)n_root * SZDIRE / ss;	/* Root dir size [sector] */

+			}

+			b_fat = b_vol + sz_rsv;						/* FAT base */

+			b_data = b_fat + sz_fat * n_fat + sz_dir;	/* Data base */

+

+			/* Align data area to erase block boundary (for flash memory media) */

+			n = (DWORD)(((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data);	/* Sectors to next nearest from current data base */

+			if (fsty == FS_FAT32) {		/* FAT32: Move FAT */

+				sz_rsv += n; b_fat += n;

+			} else {					/* FAT: Expand FAT */

+				if (n % n_fat) {	/* Adjust fractional error if needed */

+					n--; sz_rsv++; b_fat++;

+				}

+				sz_fat += n / n_fat;

+			}

+

+			/* Determine number of clusters and final check of validity of the FAT sub-type */

+			if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too small volume? */

+			n_clst = ((DWORD)sz_vol - sz_rsv - sz_fat * n_fat - sz_dir) / pau;

+			if (fsty == FS_FAT32) {

+				if (n_clst <= MAX_FAT16) {	/* Too few clusters for FAT32? */

+					if (sz_au == 0 && (sz_au = pau / 2) != 0) continue;	/* Adjust cluster size and retry */

+					LEAVE_MKFS(FR_MKFS_ABORTED);

+				}

+			}

+			if (fsty == FS_FAT16) {

+				if (n_clst > MAX_FAT16) {	/* Too many clusters for FAT16 */

+					if (sz_au == 0 && (pau * 2) <= 64) {

+						sz_au = pau * 2; continue;	/* Adjust cluster size and retry */

+					}

+					if ((fsopt & FM_FAT32)) {

+						fsty = FS_FAT32; continue;	/* Switch type to FAT32 and retry */

+					}

+					if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue;	/* Adjust cluster size and retry */

+					LEAVE_MKFS(FR_MKFS_ABORTED);

+				}

+				if  (n_clst <= MAX_FAT12) {	/* Too few clusters for FAT16 */

+					if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue;	/* Adjust cluster size and retry */

+					LEAVE_MKFS(FR_MKFS_ABORTED);

+				}

+			}

+			if (fsty == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED);	/* Too many clusters for FAT12 */

+

+			/* Ok, it is the valid cluster configuration */

+			break;

+		} while (1);

+

+#if FF_USE_TRIM

+		lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1;	/* Inform storage device that the volume area may be erased */

+		disk_ioctl(pdrv, CTRL_TRIM, lba);

+#endif

+		/* Create FAT VBR */

+		memset(buf, 0, ss);

+		memcpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);	/* Boot jump code (x86), OEM name */

+		st_word(buf + BPB_BytsPerSec, ss);				/* Sector size [byte] */

+		buf[BPB_SecPerClus] = (BYTE)pau;				/* Cluster size [sector] */

+		st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv);	/* Size of reserved area */

+		buf[BPB_NumFATs] = (BYTE)n_fat;					/* Number of FATs */

+		st_word(buf + BPB_RootEntCnt, (WORD)((fsty == FS_FAT32) ? 0 : n_root));	/* Number of root directory entries */

+		if (sz_vol < 0x10000) {

+			st_word(buf + BPB_TotSec16, (WORD)sz_vol);	/* Volume size in 16-bit LBA */

+		} else {

+			st_dword(buf + BPB_TotSec32, (DWORD)sz_vol);	/* Volume size in 32-bit LBA */

+		}

+		buf[BPB_Media] = 0xF8;							/* Media descriptor byte */

+		st_word(buf + BPB_SecPerTrk, 63);				/* Number of sectors per track (for int13) */

+		st_word(buf + BPB_NumHeads, 255);				/* Number of heads (for int13) */

+		st_dword(buf + BPB_HiddSec, (DWORD)b_vol);		/* Volume offset in the physical drive [sector] */

+		if (fsty == FS_FAT32) {

+			st_dword(buf + BS_VolID32, vsn);			/* VSN */

+			st_dword(buf + BPB_FATSz32, sz_fat);		/* FAT size [sector] */

+			st_dword(buf + BPB_RootClus32, 2);			/* Root directory cluster # (2) */

+			st_word(buf + BPB_FSInfo32, 1);				/* Offset of FSINFO sector (VBR + 1) */

+			st_word(buf + BPB_BkBootSec32, 6);			/* Offset of backup VBR (VBR + 6) */

+			buf[BS_DrvNum32] = 0x80;					/* Drive number (for int13) */

+			buf[BS_BootSig32] = 0x29;					/* Extended boot signature */

+			memcpy(buf + BS_VolLab32, "NO NAME    " "FAT32   ", 19);	/* Volume label, FAT signature */

+		} else {

+			st_dword(buf + BS_VolID, vsn);				/* VSN */

+			st_word(buf + BPB_FATSz16, (WORD)sz_fat);	/* FAT size [sector] */

+			buf[BS_DrvNum] = 0x80;						/* Drive number (for int13) */

+			buf[BS_BootSig] = 0x29;						/* Extended boot signature */

+			memcpy(buf + BS_VolLab, "NO NAME    " "FAT     ", 19);	/* Volume label, FAT signature */

+		}

+		st_word(buf + BS_55AA, 0xAA55);					/* Signature (offset is fixed here regardless of sector size) */

+		if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);	/* Write it to the VBR sector */

+

+		/* Create FSINFO record if needed */

+		if (fsty == FS_FAT32) {

+			disk_write(pdrv, buf, b_vol + 6, 1);		/* Write backup VBR (VBR + 6) */

+			memset(buf, 0, ss);

+			st_dword(buf + FSI_LeadSig, 0x41615252);

+			st_dword(buf + FSI_StrucSig, 0x61417272);

+			st_dword(buf + FSI_Free_Count, n_clst - 1);	/* Number of free clusters */

+			st_dword(buf + FSI_Nxt_Free, 2);			/* Last allocated cluster# */

+			st_word(buf + BS_55AA, 0xAA55);

+			disk_write(pdrv, buf, b_vol + 7, 1);		/* Write backup FSINFO (VBR + 7) */

+			disk_write(pdrv, buf, b_vol + 1, 1);		/* Write original FSINFO (VBR + 1) */

+		}

+

+		/* Initialize FAT area */

+		memset(buf, 0, sz_buf * ss);

+		sect = b_fat;		/* FAT start sector */

+		for (i = 0; i < n_fat; i++) {			/* Initialize FATs each */

+			if (fsty == FS_FAT32) {

+				st_dword(buf + 0, 0xFFFFFFF8);	/* FAT[0] */

+				st_dword(buf + 4, 0xFFFFFFFF);	/* FAT[1] */

+				st_dword(buf + 8, 0x0FFFFFFF);	/* FAT[2] (root directory) */

+			} else {

+				st_dword(buf + 0, (fsty == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8);	/* FAT[0] and FAT[1] */

+			}

+			nsect = sz_fat;		/* Number of FAT sectors */

+			do {	/* Fill FAT sectors */

+				n = (nsect > sz_buf) ? sz_buf : nsect;

+				if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+				memset(buf, 0, ss);	/* Rest of FAT all are cleared */

+				sect += n; nsect -= n;

+			} while (nsect);

+		}

+

+		/* Initialize root directory (fill with zero) */

+		nsect = (fsty == FS_FAT32) ? pau : sz_dir;	/* Number of root directory sectors */

+		do {

+			n = (nsect > sz_buf) ? sz_buf : nsect;

+			if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+			sect += n; nsect -= n;

+		} while (nsect);

+	}

+

+	/* A FAT volume has been created here */

+

+	/* Determine system ID in the MBR partition table */

+	if (FF_FS_EXFAT && fsty == FS_EXFAT) {

+		sys = 0x07;			/* exFAT */

+	} else {

+		if (fsty == FS_FAT32) {

+			sys = 0x0C;		/* FAT32X */

+		} else {

+			if (sz_vol >= 0x10000) {

+				sys = 0x06;	/* FAT12/16 (large) */

+			} else {

+				sys = (fsty == FS_FAT16) ? 0x04 : 0x01;	/* FAT16 : FAT12 */

+			}

+		}

+	}

+

+	/* Update partition information */

+	if (FF_MULTI_PARTITION && ipart != 0) {	/* Volume is in the existing partition */

+		if (!FF_LBA64 || !(fsopt & 0x80)) {

+			/* Update system ID in the partition table */

+			if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);	/* Read the MBR */

+			buf[MBR_Table + (ipart - 1) * SZ_PTE + PTE_System] = sys;			/* Set system ID */

+			if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);	/* Write it back to the MBR */

+		}

+	} else {								/* Volume as a new single partition */

+		if (!(fsopt & FM_SFD)) {			/* Create partition table if not in SFD */

+			lba[0] = sz_vol; lba[1] = 0;

+			fr = create_partition(pdrv, lba, sys, buf);

+			if (fr != FR_OK) LEAVE_MKFS(fr);

+		}

+	}

+

+	if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);

+

+	LEAVE_MKFS(FR_OK);

+}

+

+

+

+

+#if FF_MULTI_PARTITION

+/*-----------------------------------------------------------------------*/

+/* Create Partition Table on the Physical Drive                          */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_fdisk (

+	BYTE pdrv,			/* Physical drive number */

+	const LBA_t ptbl[],	/* Pointer to the size table for each partitions */

+	void* work			/* Pointer to the working buffer (null: use heap memory) */

+)

+{

+	BYTE *buf = (BYTE*)work;

+	DSTATUS stat;

+

+

+	stat = disk_initialize(pdrv);

+	if (stat & STA_NOINIT) return FR_NOT_READY;

+	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;

+#if FF_USE_LFN == 3

+	if (!buf) buf = ff_memalloc(FF_MAX_SS);	/* Use heap memory for working buffer */

+#endif

+	if (!buf) return FR_NOT_ENOUGH_CORE;

+

+	LEAVE_MKFS(create_partition(pdrv, ptbl, 0x07, buf));

+}

+

+#endif /* FF_MULTI_PARTITION */

+#endif /* !FF_FS_READONLY && FF_USE_MKFS */

+

+

+

+

+#if FF_USE_STRFUNC

+#if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3)

+#error Wrong FF_STRF_ENCODE setting

+#endif

+/*-----------------------------------------------------------------------*/

+/* Get a String from the File                                            */

+/*-----------------------------------------------------------------------*/

+

+TCHAR* f_gets (

+	TCHAR* buff,	/* Pointer to the buffer to store read string */

+	int len,		/* Size of string buffer (items) */

+	FIL* fp			/* Pointer to the file object */

+)

+{

+	int nc = 0;

+	TCHAR *p = buff;

+	BYTE s[4];

+	UINT rc;

+	DWORD dc;

+#if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE <= 2

+	WCHAR wc;

+#endif

+#if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE == 3

+	UINT ct;

+#endif

+

+#if FF_USE_LFN && FF_LFN_UNICODE			/* With code conversion (Unicode API) */

+	/* Make a room for the character and terminator  */

+	if (FF_LFN_UNICODE == 1) len -= (FF_STRF_ENCODE == 0) ? 1 : 2;

+	if (FF_LFN_UNICODE == 2) len -= (FF_STRF_ENCODE == 0) ? 3 : 4;

+	if (FF_LFN_UNICODE == 3) len -= 1;

+	while (nc < len) {

+#if FF_STRF_ENCODE == 0				/* Read a character in ANSI/OEM */

+		f_read(fp, s, 1, &rc);		/* Get a code unit */

+		if (rc != 1) break;			/* EOF? */

+		wc = s[0];

+		if (dbc_1st((BYTE)wc)) {	/* DBC 1st byte? */

+			f_read(fp, s, 1, &rc);	/* Get 2nd byte */

+			if (rc != 1 || !dbc_2nd(s[0])) continue;	/* Wrong code? */

+			wc = wc << 8 | s[0];

+		}

+		dc = ff_oem2uni(wc, CODEPAGE);	/* Convert ANSI/OEM into Unicode */

+		if (dc == 0) continue;		/* Conversion error? */

+#elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 	/* Read a character in UTF-16LE/BE */

+		f_read(fp, s, 2, &rc);		/* Get a code unit */

+		if (rc != 2) break;			/* EOF? */

+		dc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];

+		if (IsSurrogateL(dc)) continue;	/* Broken surrogate pair? */

+		if (IsSurrogateH(dc)) {		/* High surrogate? */

+			f_read(fp, s, 2, &rc);	/* Get low surrogate */

+			if (rc != 2) break;		/* EOF? */

+			wc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];

+			if (!IsSurrogateL(wc)) continue;	/* Broken surrogate pair? */

+			dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF);	/* Merge surrogate pair */

+		}

+#else	/* Read a character in UTF-8 */

+		f_read(fp, s, 1, &rc);		/* Get a code unit */

+		if (rc != 1) break;			/* EOF? */

+		dc = s[0];

+		if (dc >= 0x80) {			/* Multi-byte sequence? */

+			ct = 0;

+			if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; }	/* 2-byte sequence? */

+			if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; }	/* 3-byte sequence? */

+			if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; }	/* 4-byte sequence? */

+			if (ct == 0) continue;

+			f_read(fp, s, ct, &rc);	/* Get trailing bytes */

+			if (rc != ct) break;

+			rc = 0;

+			do {	/* Merge the byte sequence */

+				if ((s[rc] & 0xC0) != 0x80) break;

+				dc = dc << 6 | (s[rc] & 0x3F);

+			} while (++rc < ct);

+			if (rc != ct || dc < 0x80 || IsSurrogate(dc) || dc >= 0x110000) continue;	/* Wrong encoding? */

+		}

+#endif

+		/* A code point is avaialble in dc to be output */

+

+		if (FF_USE_STRFUNC == 2 && dc == '\r') continue;	/* Strip \r off if needed */

+#if FF_LFN_UNICODE == 1	|| FF_LFN_UNICODE == 3	/* Output it in UTF-16/32 encoding */

+		if (FF_LFN_UNICODE == 1 && dc >= 0x10000) {	/* Out of BMP at UTF-16? */

+			*p++ = (TCHAR)(0xD800 | ((dc >> 10) - 0x40)); nc++;	/* Make and output high surrogate */

+			dc = 0xDC00 | (dc & 0x3FF);		/* Make low surrogate */

+		}

+		*p++ = (TCHAR)dc; nc++;

+		if (dc == '\n') break;	/* End of line? */

+#elif FF_LFN_UNICODE == 2		/* Output it in UTF-8 encoding */

+		if (dc < 0x80) {	/* Single byte? */

+			*p++ = (TCHAR)dc;

+			nc++;

+			if (dc == '\n') break;	/* End of line? */

+		} else {

+			if (dc < 0x800) {		/* 2-byte sequence? */

+				*p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F));

+				*p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));

+				nc += 2;

+			} else {

+				if (dc < 0x10000) {	/* 3-byte sequence? */

+					*p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F));

+					*p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));

+					*p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));

+					nc += 3;

+				} else {			/* 4-byte sequence? */

+					*p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07));

+					*p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F));

+					*p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));

+					*p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));

+					nc += 4;

+				}

+			}

+		}

+#endif

+	}

+

+#else			/* Byte-by-byte read without any conversion (ANSI/OEM API) */

+	len -= 1;	/* Make a room for the terminator */

+	while (nc < len) {

+		f_read(fp, s, 1, &rc);	/* Get a byte */

+		if (rc != 1) break;		/* EOF? */

+		dc = s[0];

+		if (FF_USE_STRFUNC == 2 && dc == '\r') continue;

+		*p++ = (TCHAR)dc; nc++;

+		if (dc == '\n') break;

+	}

+#endif

+

+	*p = 0;		/* Terminate the string */

+	return nc ? buff : 0;	/* When no data read due to EOF or error, return with error. */

+}

+

+

+

+

+#if !FF_FS_READONLY

+#include <stdarg.h>

+#define SZ_PUTC_BUF	64

+#define SZ_NUM_BUF	32

+

+/*-----------------------------------------------------------------------*/

+/* Put a Character to the File (with sub-functions)                      */

+/*-----------------------------------------------------------------------*/

+

+/* Output buffer and work area */

+

+typedef struct {

+	FIL *fp;		/* Ptr to the writing file */

+	int idx, nchr;	/* Write index of buf[] (-1:error), number of encoding units written */

+#if FF_USE_LFN && FF_LFN_UNICODE == 1

+	WCHAR hs;

+#elif FF_USE_LFN && FF_LFN_UNICODE == 2

+	BYTE bs[4];

+	UINT wi, ct;

+#endif

+	BYTE buf[SZ_PUTC_BUF];	/* Write buffer */

+} putbuff;

+

+

+/* Buffered file write with code conversion */

+

+static void putc_bfd (putbuff* pb, TCHAR c)

+{

+	UINT n;

+	int i, nc;

+#if FF_USE_LFN && FF_LFN_UNICODE

+	WCHAR hs, wc;

+#if FF_LFN_UNICODE == 2

+	DWORD dc;

+	const TCHAR *tp;

+#endif

+#endif

+

+	if (FF_USE_STRFUNC == 2 && c == '\n') {	 /* LF -> CRLF conversion */

+		putc_bfd(pb, '\r');

+	}

+

+	i = pb->idx;			/* Write index of pb->buf[] */

+	if (i < 0) return;		/* In write error? */

+	nc = pb->nchr;			/* Write unit counter */

+

+#if FF_USE_LFN && FF_LFN_UNICODE

+#if FF_LFN_UNICODE == 1		/* UTF-16 input */

+	if (IsSurrogateH(c)) {	/* High surrogate? */

+		pb->hs = c; return;	/* Save it for next */

+	}

+	hs = pb->hs; pb->hs = 0;

+	if (hs != 0) {			/* There is a leading high surrogate */

+		if (!IsSurrogateL(c)) hs = 0;	/* Discard high surrogate if not a surrogate pair */

+	} else {

+		if (IsSurrogateL(c)) return;	/* Discard stray low surrogate */

+	}

+	wc = c;

+#elif FF_LFN_UNICODE == 2	/* UTF-8 input */

+	for (;;) {

+		if (pb->ct == 0) {	/* Out of multi-byte sequence? */

+			pb->bs[pb->wi = 0] = (BYTE)c;	/* Save 1st byte */

+			if ((BYTE)c < 0x80) break;					/* Single byte? */

+			if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1;	/* 2-byte sequence? */

+			if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2;	/* 3-byte sequence? */

+			if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3;	/* 4-byte sequence? */

+			return;

+		} else {				/* In the multi-byte sequence */

+			if (((BYTE)c & 0xC0) != 0x80) {	/* Broken sequence? */

+				pb->ct = 0; continue;

+			}

+			pb->bs[++pb->wi] = (BYTE)c;	/* Save the trailing byte */

+			if (--pb->ct == 0) break;	/* End of multi-byte sequence? */

+			return;

+		}

+	}

+	tp = (const TCHAR*)pb->bs;

+	dc = tchar2uni(&tp);	/* UTF-8 ==> UTF-16 */

+	if (dc == 0xFFFFFFFF) return;	/* Wrong code? */

+	wc = (WCHAR)dc;

+	hs = (WCHAR)(dc >> 16);

+#elif FF_LFN_UNICODE == 3	/* UTF-32 input */

+	if (IsSurrogate(c) || c >= 0x110000) return;	/* Discard invalid code */

+	if (c >= 0x10000) {		/* Out of BMP? */

+		hs = (WCHAR)(0xD800 | ((c >> 10) - 0x40)); 	/* Make high surrogate */

+		wc = 0xDC00 | (c & 0x3FF);					/* Make low surrogate */

+	} else {

+		hs = 0;

+		wc = (WCHAR)c;

+	}

+#endif

+	/* A code point in UTF-16 is available in hs and wc */

+

+#if FF_STRF_ENCODE == 1		/* Write a code point in UTF-16LE */

+	if (hs != 0) {	/* Surrogate pair? */

+		st_word(&pb->buf[i], hs);

+		i += 2;

+		nc++;

+	}

+	st_word(&pb->buf[i], wc);

+	i += 2;

+#elif FF_STRF_ENCODE == 2	/* Write a code point in UTF-16BE */

+	if (hs != 0) {	/* Surrogate pair? */

+		pb->buf[i++] = (BYTE)(hs >> 8);

+		pb->buf[i++] = (BYTE)hs;

+		nc++;

+	}

+	pb->buf[i++] = (BYTE)(wc >> 8);

+	pb->buf[i++] = (BYTE)wc;

+#elif FF_STRF_ENCODE == 3	/* Write a code point in UTF-8 */

+	if (hs != 0) {	/* 4-byte sequence? */

+		nc += 3;

+		hs = (hs & 0x3FF) + 0x40;

+		pb->buf[i++] = (BYTE)(0xF0 | hs >> 8);

+		pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F));

+		pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F));

+		pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));

+	} else {

+		if (wc < 0x80) {	/* Single byte? */

+			pb->buf[i++] = (BYTE)wc;

+		} else {

+			if (wc < 0x800) {	/* 2-byte sequence? */

+				nc += 1;

+				pb->buf[i++] = (BYTE)(0xC0 | wc >> 6);

+			} else {			/* 3-byte sequence */

+				nc += 2;

+				pb->buf[i++] = (BYTE)(0xE0 | wc >> 12);

+				pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F));

+			}

+			pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));

+		}

+	}

+#else						/* Write a code point in ANSI/OEM */

+	if (hs != 0) return;

+	wc = ff_uni2oem(wc, CODEPAGE);	/* UTF-16 ==> ANSI/OEM */

+	if (wc == 0) return;

+	if (wc >= 0x100) {

+		pb->buf[i++] = (BYTE)(wc >> 8); nc++;

+	}

+	pb->buf[i++] = (BYTE)wc;

+#endif

+

+#else							/* ANSI/OEM input (without re-encoding) */

+	pb->buf[i++] = (BYTE)c;

+#endif

+

+	if (i >= (int)(sizeof pb->buf) - 4) {	/* Write buffered characters to the file */

+		f_write(pb->fp, pb->buf, (UINT)i, &n);

+		i = (n == (UINT)i) ? 0 : -1;

+	}

+	pb->idx = i;

+	pb->nchr = nc + 1;

+}

+

+

+/* Flush remaining characters in the buffer */

+

+static int putc_flush (putbuff* pb)

+{

+	UINT nw;

+

+	if (   pb->idx >= 0	/* Flush buffered characters to the file */

+		&& f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK

+		&& (UINT)pb->idx == nw) return pb->nchr;

+	return -1;

+}

+

+

+/* Initialize write buffer */

+

+static void putc_init (putbuff* pb, FIL* fp)

+{

+	memset(pb, 0, sizeof (putbuff));

+	pb->fp = fp;

+}

+

+

+

+int f_putc (

+	TCHAR c,	/* A character to be output */

+	FIL* fp		/* Pointer to the file object */

+)

+{

+	putbuff pb;

+

+

+	putc_init(&pb, fp);

+	putc_bfd(&pb, c);	/* Put the character */

+	return putc_flush(&pb);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Put a String to the File                                              */

+/*-----------------------------------------------------------------------*/

+

+int f_puts (

+	const TCHAR* str,	/* Pointer to the string to be output */

+	FIL* fp				/* Pointer to the file object */

+)

+{

+	putbuff pb;

+

+

+	putc_init(&pb, fp);

+	while (*str) putc_bfd(&pb, *str++);		/* Put the string */

+	return putc_flush(&pb);

+}

+

+

+

+

+/*-----------------------------------------------------------------------*/

+/* Put a Formatted String to the File (with sub-functions)               */

+/*-----------------------------------------------------------------------*/

+#if FF_PRINT_FLOAT && FF_INTDEF == 2

+#include <math.h>

+

+static int ilog10 (double n)	/* Calculate log10(n) in integer output */

+{

+	int rv = 0;

+

+	while (n >= 10) {	/* Decimate digit in right shift */

+		if (n >= 100000) {

+			n /= 100000; rv += 5;

+		} else {

+			n /= 10; rv++;

+		}

+	}

+	while (n < 1) {		/* Decimate digit in left shift */

+		if (n < 0.00001) {

+			n *= 100000; rv -= 5;

+		} else {

+			n *= 10; rv--;

+		}

+	}

+	return rv;

+}

+

+

+static double i10x (int n)	/* Calculate 10^n in integer input */

+{

+	double rv = 1;

+

+	while (n > 0) {		/* Left shift */

+		if (n >= 5) {

+			rv *= 100000; n -= 5;

+		} else {

+			rv *= 10; n--;

+		}

+	}

+	while (n < 0) {		/* Right shift */

+		if (n <= -5) {

+			rv /= 100000; n += 5;

+		} else {

+			rv /= 10; n++;

+		}

+	}

+	return rv;

+}

+

+

+static void ftoa (

+	char* buf,	/* Buffer to output the floating point string */

+	double val,	/* Value to output */

+	int prec,	/* Number of fractional digits */

+	TCHAR fmt	/* Notation */

+)

+{

+	int d;

+	int e = 0, m = 0;

+	char sign = 0;

+	double w;

+	const char *er = 0;

+	const char ds = FF_PRINT_FLOAT == 2 ? ',' : '.';

+

+

+	if (isnan(val)) {			/* Not a number? */

+		er = "NaN";

+	} else {

+		if (prec < 0) prec = 6;	/* Default precision? (6 fractional digits) */

+		if (val < 0) {			/* Nagative? */

+			val = 0 - val; sign = '-';

+		} else {

+			sign = '+';

+		}

+		if (isinf(val)) {		/* Infinite? */

+			er = "INF";

+		} else {

+			if (fmt == 'f') {	/* Decimal notation? */

+				val += i10x(0 - prec) / 2;	/* Round (nearest) */

+				m = ilog10(val);

+				if (m < 0) m = 0;

+				if (m + prec + 3 >= SZ_NUM_BUF) er = "OV";	/* Buffer overflow? */

+			} else {			/* E notation */

+				if (val != 0) {		/* Not a true zero? */

+					val += i10x(ilog10(val) - prec) / 2;	/* Round (nearest) */

+					e = ilog10(val);

+					if (e > 99 || prec + 7 >= SZ_NUM_BUF) {	/* Buffer overflow or E > +99? */

+						er = "OV";

+					} else {

+						if (e < -99) e = -99;

+						val /= i10x(e);	/* Normalize */

+					}

+				}

+			}

+		}

+		if (!er) {	/* Not error condition */

+			if (sign == '-') *buf++ = sign;	/* Add a - if negative value */

+			do {				/* Put decimal number */

+				if (m == -1) *buf++ = ds;	/* Insert a decimal separator when get into fractional part */

+				w = i10x(m);				/* Snip the highest digit d */

+				d = (int)(val / w); val -= d * w;

+				*buf++ = (char)('0' + d);	/* Put the digit */

+			} while (--m >= -prec);			/* Output all digits specified by prec */

+			if (fmt != 'f') {	/* Put exponent if needed */

+				*buf++ = (char)fmt;

+				if (e < 0) {

+					e = 0 - e; *buf++ = '-';

+				} else {

+					*buf++ = '+';

+				}

+				*buf++ = (char)('0' + e / 10);

+				*buf++ = (char)('0' + e % 10);

+			}

+		}

+	}

+	if (er) {	/* Error condition */

+		if (sign) *buf++ = sign;		/* Add sign if needed */

+		do *buf++ = *er++; while (*er);	/* Put error symbol */

+	}

+	*buf = 0;	/* Term */

+}

+#endif	/* FF_PRINT_FLOAT && FF_INTDEF == 2 */

+

+

+

+int f_printf (

+	FIL* fp,			/* Pointer to the file object */

+	const TCHAR* fmt,	/* Pointer to the format string */

+	...					/* Optional arguments... */

+)

+{

+	va_list arp;

+	putbuff pb;

+	UINT i, j, w, f, r;

+	int prec;

+#if FF_PRINT_LLI && FF_INTDEF == 2

+	QWORD v;

+#else

+	DWORD v;

+#endif

+	TCHAR tc, pad, *tp;

+	TCHAR nul = 0;

+	char d, str[SZ_NUM_BUF];

+

+

+	putc_init(&pb, fp);

+

+	va_start(arp, fmt);

+

+	for (;;) {

+		tc = *fmt++;

+		if (tc == 0) break;			/* End of format string */

+		if (tc != '%') {			/* Not an escape character (pass-through) */

+			putc_bfd(&pb, tc);

+			continue;

+		}

+		f = w = 0; pad = ' '; prec = -1;	/* Initialize parms */

+		tc = *fmt++;

+		if (tc == '0') {			/* Flag: '0' padded */

+			pad = '0'; tc = *fmt++;

+		} else if (tc == '-') {		/* Flag: Left aligned */

+			f = 2; tc = *fmt++;

+		}

+		if (tc == '*') {			/* Minimum width from an argument */

+			w = va_arg(arp, int);

+			tc = *fmt++;

+		} else {

+			while (IsDigit(tc)) {	/* Minimum width */

+				w = w * 10 + tc - '0';

+				tc = *fmt++;

+			}

+		}

+		if (tc == '.') {			/* Precision */

+			tc = *fmt++;

+			if (tc == '*') {		/* Precision from an argument */

+				prec = va_arg(arp, int);

+				tc = *fmt++;

+			} else {

+				prec = 0;

+				while (IsDigit(tc)) {	/* Precision */

+					prec = prec * 10 + tc - '0';

+					tc = *fmt++;

+				}

+			}

+		}

+		if (tc == 'l') {			/* Size: long int */

+			f |= 4; tc = *fmt++;

+#if FF_PRINT_LLI && FF_INTDEF == 2

+			if (tc == 'l') {		/* Size: long long int */

+				f |= 8; tc = *fmt++;

+			}

+#endif

+		}

+		if (tc == 0) break;			/* End of format string */

+		switch (tc) {				/* Atgument type is... */

+		case 'b':					/* Unsigned binary */

+			r = 2; break;

+		case 'o':					/* Unsigned octal */

+			r = 8; break;

+		case 'd':					/* Signed decimal */

+		case 'u':					/* Unsigned decimal */

+			r = 10; break;

+		case 'x':					/* Unsigned hexdecimal (lower case) */

+		case 'X':					/* Unsigned hexdecimal (upper case) */

+			r = 16; break;

+		case 'c':					/* Character */

+			putc_bfd(&pb, (TCHAR)va_arg(arp, int));

+			continue;

+		case 's':					/* String */

+			tp = va_arg(arp, TCHAR*);	/* Get a pointer argument */

+			if (!tp) tp = &nul;		/* Null ptr generates a null string */

+			for (j = 0; tp[j]; j++) ;	/* j = tcslen(tp) */

+			if (prec >= 0 && j > (UINT)prec) j = prec;	/* Limited length of string body */

+			for ( ; !(f & 2) && j < w; j++) putc_bfd(&pb, pad);	/* Left pads */

+			while (*tp && prec--) putc_bfd(&pb, *tp++);	/* Body */

+			while (j++ < w) putc_bfd(&pb, ' ');			/* Right pads */

+			continue;

+#if FF_PRINT_FLOAT && FF_INTDEF == 2

+		case 'f':					/* Floating point (decimal) */

+		case 'e':					/* Floating point (e) */

+		case 'E':					/* Floating point (E) */

+			ftoa(str, va_arg(arp, double), prec, tc);	/* Make a flaoting point string */

+			for (j = strlen(str); !(f & 2) && j < w; j++) putc_bfd(&pb, pad);	/* Left pads */

+			for (i = 0; str[i]; putc_bfd(&pb, str[i++])) ;	/* Body */

+			while (j++ < w) putc_bfd(&pb, ' ');	/* Right pads */

+			continue;

+#endif

+		default:					/* Unknown type (pass-through) */

+			putc_bfd(&pb, tc); continue;

+		}

+

+		/* Get an integer argument and put it in numeral */

+#if FF_PRINT_LLI && FF_INTDEF == 2

+		if (f & 8) {	/* long long argument? */

+			v = (QWORD)va_arg(arp, LONGLONG);

+		} else {

+			if (f & 4) {	/* long argument? */

+				v = (tc == 'd') ? (QWORD)(LONGLONG)va_arg(arp, long) : (QWORD)va_arg(arp, unsigned long);

+			} else {		/* int/short/char argument */

+				v = (tc == 'd') ? (QWORD)(LONGLONG)va_arg(arp, int) : (QWORD)va_arg(arp, unsigned int);

+			}

+		}

+		if (tc == 'd' && (v & 0x8000000000000000)) {	/* Negative value? */

+			v = 0 - v; f |= 1;

+		}

+#else

+		if (f & 4) {	/* long argument? */

+			v = (DWORD)va_arg(arp, long);

+		} else {		/* int/short/char argument */

+			v = (tc == 'd') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int);

+		}

+		if (tc == 'd' && (v & 0x80000000)) {	/* Negative value? */

+			v = 0 - v; f |= 1;

+		}

+#endif

+		i = 0;

+		do {	/* Make an integer number string */

+			d = (char)(v % r); v /= r;

+			if (d > 9) d += (tc == 'x') ? 0x27 : 0x07;

+			str[i++] = d + '0';

+		} while (v && i < SZ_NUM_BUF);

+		if (f & 1) str[i++] = '-';	/* Sign */

+		/* Write it */

+		for (j = i; !(f & 2) && j < w; j++) putc_bfd(&pb, pad);	/* Left pads */

+		do putc_bfd(&pb, (TCHAR)str[--i]); while (i);	/* Body */

+		while (j++ < w) putc_bfd(&pb, ' ');		/* Right pads */

+	}

+

+	va_end(arp);

+

+	return putc_flush(&pb);

+}

+

+#endif /* !FF_FS_READONLY */

+#endif /* FF_USE_STRFUNC */

+

+

+

+#if FF_CODE_PAGE == 0

+/*-----------------------------------------------------------------------*/

+/* Set Active Codepage for the Path Name                                 */

+/*-----------------------------------------------------------------------*/

+

+FRESULT f_setcp (

+	WORD cp		/* Value to be set as active code page */

+)

+{

+	static const WORD       validcp[22] = {  437,   720,   737,   771,   775,   850,   852,   855,   857,   860,   861,   862,   863,   864,   865,   866,   869,   932,   936,   949,   950, 0};

+	static const BYTE* const tables[22] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct855, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0};

+	UINT i;

+

+

+	for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ;	/* Find the code page */

+	if (validcp[i] != cp) return FR_INVALID_PARAMETER;	/* Not found? */

+

+	CodePage = cp;

+	if (cp >= 900) {	/* DBCS */

+		ExCvt = 0;

+		DbcTbl = tables[i];

+	} else {			/* SBCS */

+		ExCvt = tables[i];

+		DbcTbl = 0;

+	}

+	return FR_OK;

+}

+#endif	/* FF_CODE_PAGE == 0 */

+

diff --git a/fw/fe310/fsfat/ff.h b/fw/fe310/fsfat/ff.h
new file mode 100644
index 0000000..64bf79d
--- /dev/null
+++ b/fw/fe310/fsfat/ff.h
@@ -0,0 +1,422 @@
+/*----------------------------------------------------------------------------/

+/  FatFs - Generic FAT Filesystem module  R0.14b                              /

+/-----------------------------------------------------------------------------/

+/

+/ Copyright (C) 2021, ChaN, all right reserved.

+/

+/ FatFs module is an open source software. Redistribution and use of FatFs in

+/ source and binary forms, with or without modification, are permitted provided

+/ that the following condition is met:

+

+/ 1. Redistributions of source code must retain the above copyright notice,

+/    this condition and the following disclaimer.

+/

+/ This software is provided by the copyright holder and contributors "AS IS"

+/ and any warranties related to this software are DISCLAIMED.

+/ The copyright owner or contributors be NOT LIABLE for any damages caused

+/ by use of this software.

+/

+/----------------------------------------------------------------------------*/

+

+

+#ifndef FF_DEFINED

+#define FF_DEFINED	86631	/* Revision ID */

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+

+#include "ffconf.h"		/* FatFs configuration options */

+

+#if FF_DEFINED != FFCONF_DEF

+#error Wrong configuration file (ffconf.h).

+#endif

+

+

+/* Integer types used for FatFs API */

+

+#if defined(_WIN32)		/* Windows VC++ (for development only) */

+#define FF_INTDEF 2

+#include <windows.h>

+typedef unsigned __int64 QWORD;

+#include <float.h>

+#define isnan(v) _isnan(v)

+#define isinf(v) (!_finite(v))

+

+#elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__cplusplus)	/* C99 or later */

+#define FF_INTDEF 2

+#include <stdint.h>

+typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */

+typedef unsigned char	BYTE;	/* char must be 8-bit */

+typedef uint16_t		WORD;	/* 16-bit unsigned integer */

+typedef uint32_t		DWORD;	/* 32-bit unsigned integer */

+typedef uint64_t		QWORD;	/* 64-bit unsigned integer */

+typedef WORD			WCHAR;	/* UTF-16 character type */

+

+#else  	/* Earlier than C99 */

+#define FF_INTDEF 1

+typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */

+typedef unsigned char	BYTE;	/* char must be 8-bit */

+typedef unsigned short	WORD;	/* 16-bit unsigned integer */

+typedef unsigned long	DWORD;	/* 32-bit unsigned integer */

+typedef WORD			WCHAR;	/* UTF-16 character type */

+#endif

+

+

+/* Type of file size and LBA variables */

+

+#if FF_FS_EXFAT

+#if FF_INTDEF != 2

+#error exFAT feature wants C99 or later

+#endif

+typedef QWORD FSIZE_t;

+#if FF_LBA64

+typedef QWORD LBA_t;

+#else

+typedef DWORD LBA_t;

+#endif

+#else

+#if FF_LBA64

+#error exFAT needs to be enabled when enable 64-bit LBA

+#endif

+typedef DWORD FSIZE_t;

+typedef DWORD LBA_t;

+#endif

+

+

+

+/* Type of path name strings on FatFs API (TCHAR) */

+

+#if FF_USE_LFN && FF_LFN_UNICODE == 1 	/* Unicode in UTF-16 encoding */

+typedef WCHAR TCHAR;

+#define _T(x) L ## x

+#define _TEXT(x) L ## x

+#elif FF_USE_LFN && FF_LFN_UNICODE == 2	/* Unicode in UTF-8 encoding */

+typedef char TCHAR;

+#define _T(x) u8 ## x

+#define _TEXT(x) u8 ## x

+#elif FF_USE_LFN && FF_LFN_UNICODE == 3	/* Unicode in UTF-32 encoding */

+typedef DWORD TCHAR;

+#define _T(x) U ## x

+#define _TEXT(x) U ## x

+#elif FF_USE_LFN && (FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3)

+#error Wrong FF_LFN_UNICODE setting

+#else									/* ANSI/OEM code in SBCS/DBCS */

+typedef char TCHAR;

+#define _T(x) x

+#define _TEXT(x) x

+#endif

+

+

+

+/* Definitions of volume management */

+

+#if FF_MULTI_PARTITION		/* Multiple partition configuration */

+typedef struct {

+	BYTE pd;	/* Physical drive number */

+	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */

+} PARTITION;

+extern PARTITION VolToPart[];	/* Volume - Partition mapping table */

+#endif

+

+#if FF_STR_VOLUME_ID

+#ifndef FF_VOLUME_STRS

+extern const char* VolumeStr[FF_VOLUMES];	/* User defied volume ID */

+#endif

+#endif

+

+

+

+/* Filesystem object structure (FATFS) */

+

+typedef struct {

+	BYTE	fs_type;		/* Filesystem type (0:not mounted) */

+	BYTE	pdrv;			/* Associated physical drive */

+	BYTE	n_fats;			/* Number of FATs (1 or 2) */

+	BYTE	wflag;			/* win[] flag (b0:dirty) */

+	BYTE	fsi_flag;		/* FSINFO flags (b7:disabled, b0:dirty) */

+	WORD	id;				/* Volume mount ID */

+	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */

+	WORD	csize;			/* Cluster size [sectors] */

+#if FF_MAX_SS != FF_MIN_SS

+	WORD	ssize;			/* Sector size (512, 1024, 2048 or 4096) */

+#endif

+#if FF_USE_LFN

+	WCHAR*	lfnbuf;			/* LFN working buffer */

+#endif

+#if FF_FS_EXFAT

+	BYTE*	dirbuf;			/* Directory entry block scratchpad buffer for exFAT */

+#endif

+#if FF_FS_REENTRANT

+	FF_SYNC_t	sobj;		/* Identifier of sync object */

+#endif

+#if !FF_FS_READONLY

+	DWORD	last_clst;		/* Last allocated cluster */

+	DWORD	free_clst;		/* Number of free clusters */

+#endif

+#if FF_FS_RPATH

+	DWORD	cdir;			/* Current directory start cluster (0:root) */

+#if FF_FS_EXFAT

+	DWORD	cdc_scl;		/* Containing directory start cluster (invalid when cdir is 0) */

+	DWORD	cdc_size;		/* b31-b8:Size of containing directory, b7-b0: Chain status */

+	DWORD	cdc_ofs;		/* Offset in the containing directory (invalid when cdir is 0) */

+#endif

+#endif

+	DWORD	n_fatent;		/* Number of FAT entries (number of clusters + 2) */

+	DWORD	fsize;			/* Size of an FAT [sectors] */

+	LBA_t	volbase;		/* Volume base sector */

+	LBA_t	fatbase;		/* FAT base sector */

+	LBA_t	dirbase;		/* Root directory base sector/cluster */

+	LBA_t	database;		/* Data base sector */

+#if FF_FS_EXFAT

+	LBA_t	bitbase;		/* Allocation bitmap base sector */

+#endif

+	LBA_t	winsect;		/* Current sector appearing in the win[] */

+	BYTE	win[FF_MAX_SS];	/* Disk access window for Directory, FAT (and file data at tiny cfg) */

+} FATFS;

+

+

+

+/* Object ID and allocation information (FFOBJID) */

+

+typedef struct {

+	FATFS*	fs;				/* Pointer to the hosting volume of this object */

+	WORD	id;				/* Hosting volume mount ID */

+	BYTE	attr;			/* Object attribute */

+	BYTE	stat;			/* Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */

+	DWORD	sclust;			/* Object data start cluster (0:no cluster or root directory) */

+	FSIZE_t	objsize;		/* Object size (valid when sclust != 0) */

+#if FF_FS_EXFAT

+	DWORD	n_cont;			/* Size of first fragment - 1 (valid when stat == 3) */

+	DWORD	n_frag;			/* Size of last fragment needs to be written to FAT (valid when not zero) */

+	DWORD	c_scl;			/* Containing directory start cluster (valid when sclust != 0) */

+	DWORD	c_size;			/* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */

+	DWORD	c_ofs;			/* Offset in the containing directory (valid when file object and sclust != 0) */

+#endif

+#if FF_FS_LOCK

+	UINT	lockid;			/* File lock ID origin from 1 (index of file semaphore table Files[]) */

+#endif

+} FFOBJID;

+

+

+

+/* File object structure (FIL) */

+

+typedef struct {

+	FFOBJID	obj;			/* Object identifier (must be the 1st member to detect invalid object pointer) */

+	BYTE	flag;			/* File status flags */

+	BYTE	err;			/* Abort flag (error code) */

+	FSIZE_t	fptr;			/* File read/write pointer (Zeroed on file open) */

+	DWORD	clust;			/* Current cluster of fpter (invalid when fptr is 0) */

+	LBA_t	sect;			/* Sector number appearing in buf[] (0:invalid) */

+#if !FF_FS_READONLY

+	LBA_t	dir_sect;		/* Sector number containing the directory entry (not used at exFAT) */

+	BYTE*	dir_ptr;		/* Pointer to the directory entry in the win[] (not used at exFAT) */

+#endif

+#if FF_USE_FASTSEEK

+	DWORD*	cltbl;			/* Pointer to the cluster link map table (nulled on open, set by application) */

+#endif

+#if !FF_FS_TINY

+	BYTE	buf[FF_MAX_SS];	/* File private data read/write window */

+#endif

+} FIL;

+

+

+

+/* Directory object structure (DIR) */

+

+typedef struct {

+	FFOBJID	obj;			/* Object identifier */

+	DWORD	dptr;			/* Current read/write offset */

+	DWORD	clust;			/* Current cluster */

+	LBA_t	sect;			/* Current sector (0:Read operation has terminated) */

+	BYTE*	dir;			/* Pointer to the directory item in the win[] */

+	BYTE	fn[12];			/* SFN (in/out) {body[8],ext[3],status[1]} */

+#if FF_USE_LFN

+	DWORD	blk_ofs;		/* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */

+#endif

+#if FF_USE_FIND

+	const TCHAR* pat;		/* Pointer to the name matching pattern */

+#endif

+} DIR;

+

+

+

+/* File information structure (FILINFO) */

+

+typedef struct {

+	FSIZE_t	fsize;			/* File size */

+	WORD	fdate;			/* Modified date */

+	WORD	ftime;			/* Modified time */

+	BYTE	fattrib;		/* File attribute */

+#if FF_USE_LFN

+	TCHAR	altname[FF_SFN_BUF + 1];/* Altenative file name */

+	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary file name */

+#else

+	TCHAR	fname[12 + 1];	/* File name */

+#endif

+} FILINFO;

+

+

+

+/* Format parameter structure (MKFS_PARM) */

+

+typedef struct {

+	BYTE fmt;			/* Format option (FM_FAT, FM_FAT32, FM_EXFAT and FM_SFD) */

+	BYTE n_fat;			/* Number of FATs */

+	UINT align;			/* Data area alignment (sector) */

+	UINT n_root;		/* Number of root directory entries */

+	DWORD au_size;		/* Cluster size (byte) */

+} MKFS_PARM;

+

+

+

+/* File function return code (FRESULT) */

+

+typedef enum {

+	FR_OK = 0,				/* (0) Succeeded */

+	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */

+	FR_INT_ERR,				/* (2) Assertion failed */

+	FR_NOT_READY,			/* (3) The physical drive cannot work */

+	FR_NO_FILE,				/* (4) Could not find the file */

+	FR_NO_PATH,				/* (5) Could not find the path */

+	FR_INVALID_NAME,		/* (6) The path name format is invalid */

+	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */

+	FR_EXIST,				/* (8) Access denied due to prohibited access */

+	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */

+	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */

+	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */

+	FR_NOT_ENABLED,			/* (12) The volume has no work area */

+	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */

+	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any problem */

+	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */

+	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */

+	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */

+	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > FF_FS_LOCK */

+	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */

+} FRESULT;

+

+

+

+/*--------------------------------------------------------------*/

+/* FatFs module application interface                           */

+

+FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode);				/* Open or create a file */

+FRESULT f_close (FIL* fp);											/* Close an open file object */

+FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br);			/* Read data from the file */

+FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw);	/* Write data to the file */

+FRESULT f_lseek (FIL* fp, FSIZE_t ofs);								/* Move file pointer of the file object */

+FRESULT f_truncate (FIL* fp);										/* Truncate the file */

+FRESULT f_sync (FIL* fp);											/* Flush cached data of the writing file */

+FRESULT f_opendir (DIR* dp, const TCHAR* path);						/* Open a directory */

+FRESULT f_closedir (DIR* dp);										/* Close an open directory */

+FRESULT f_readdir (DIR* dp, FILINFO* fno);							/* Read a directory item */

+FRESULT f_findfirst (DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern);	/* Find first file */

+FRESULT f_findnext (DIR* dp, FILINFO* fno);							/* Find next file */

+FRESULT f_mkdir (const TCHAR* path);								/* Create a sub directory */

+FRESULT f_unlink (const TCHAR* path);								/* Delete an existing file or directory */

+FRESULT f_rename (const TCHAR* path_old, const TCHAR* path_new);	/* Rename/Move a file or directory */

+FRESULT f_stat (const TCHAR* path, FILINFO* fno);					/* Get file status */

+FRESULT f_chmod (const TCHAR* path, BYTE attr, BYTE mask);			/* Change attribute of a file/dir */

+FRESULT f_utime (const TCHAR* path, const FILINFO* fno);			/* Change timestamp of a file/dir */

+FRESULT f_chdir (const TCHAR* path);								/* Change current directory */

+FRESULT f_chdrive (const TCHAR* path);								/* Change current drive */

+FRESULT f_getcwd (TCHAR* buff, UINT len);							/* Get current directory */

+FRESULT f_getfree (const TCHAR* path, DWORD* nclst, FATFS** fatfs);	/* Get number of free clusters on the drive */

+FRESULT f_getlabel (const TCHAR* path, TCHAR* label, DWORD* vsn);	/* Get volume label */

+FRESULT f_setlabel (const TCHAR* label);							/* Set volume label */

+FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf);	/* Forward data to the stream */

+FRESULT f_expand (FIL* fp, FSIZE_t fsz, BYTE opt);					/* Allocate a contiguous block to the file */

+FRESULT f_mount (FATFS* fs, const TCHAR* path, BYTE opt);			/* Mount/Unmount a logical drive */

+FRESULT f_mkfs (const TCHAR* path, const MKFS_PARM* opt, void* work, UINT len);	/* Create a FAT volume */

+FRESULT f_fdisk (BYTE pdrv, const LBA_t ptbl[], void* work);		/* Divide a physical drive into some partitions */

+FRESULT f_setcp (WORD cp);											/* Set current code page */

+int f_putc (TCHAR c, FIL* fp);										/* Put a character to the file */

+int f_puts (const TCHAR* str, FIL* cp);								/* Put a string to the file */

+int f_printf (FIL* fp, const TCHAR* str, ...);						/* Put a formatted string to the file */

+TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the file */

+

+#define f_eof(fp) ((int)((fp)->fptr == (fp)->obj.objsize))

+#define f_error(fp) ((fp)->err)

+#define f_tell(fp) ((fp)->fptr)

+#define f_size(fp) ((fp)->obj.objsize)

+#define f_rewind(fp) f_lseek((fp), 0)

+#define f_rewinddir(dp) f_readdir((dp), 0)

+#define f_rmdir(path) f_unlink(path)

+#define f_unmount(path) f_mount(0, path, 0)

+

+

+

+

+/*--------------------------------------------------------------*/

+/* Additional user defined functions                            */

+

+/* RTC function */

+#if !FF_FS_READONLY && !FF_FS_NORTC

+DWORD get_fattime (void);

+#endif

+

+/* LFN support functions */

+#if FF_USE_LFN >= 1						/* Code conversion (defined in unicode.c) */

+WCHAR ff_oem2uni (WCHAR oem, WORD cp);	/* OEM code to Unicode conversion */

+WCHAR ff_uni2oem (DWORD uni, WORD cp);	/* Unicode to OEM code conversion */

+DWORD ff_wtoupper (DWORD uni);			/* Unicode upper-case conversion */

+#endif

+#if FF_USE_LFN == 3						/* Dynamic memory allocation */

+void* ff_memalloc (UINT msize);			/* Allocate memory block */

+void ff_memfree (void* mblock);			/* Free memory block */

+#endif

+

+/* Sync functions */

+#if FF_FS_REENTRANT

+int ff_cre_syncobj (BYTE vol, FF_SYNC_t* sobj);	/* Create a sync object */

+int ff_req_grant (FF_SYNC_t sobj);		/* Lock sync object */

+void ff_rel_grant (FF_SYNC_t sobj);		/* Unlock sync object */

+int ff_del_syncobj (FF_SYNC_t sobj);	/* Delete a sync object */

+#endif

+

+

+

+

+/*--------------------------------------------------------------*/

+/* Flags and offset address                                     */

+

+

+/* File access mode and open method flags (3rd argument of f_open) */

+#define	FA_READ				0x01

+#define	FA_WRITE			0x02

+#define	FA_OPEN_EXISTING	0x00

+#define	FA_CREATE_NEW		0x04

+#define	FA_CREATE_ALWAYS	0x08

+#define	FA_OPEN_ALWAYS		0x10

+#define	FA_OPEN_APPEND		0x30

+

+/* Fast seek controls (2nd argument of f_lseek) */

+#define CREATE_LINKMAP	((FSIZE_t)0 - 1)

+

+/* Format options (2nd argument of f_mkfs) */

+#define FM_FAT		0x01

+#define FM_FAT32	0x02

+#define FM_EXFAT	0x04

+#define FM_ANY		0x07

+#define FM_SFD		0x08

+

+/* Filesystem type (FATFS.fs_type) */

+#define FS_FAT12	1

+#define FS_FAT16	2

+#define FS_FAT32	3

+#define FS_EXFAT	4

+

+/* File attribute bits for directory entry (FILINFO.fattrib) */

+#define	AM_RDO	0x01	/* Read only */

+#define	AM_HID	0x02	/* Hidden */

+#define	AM_SYS	0x04	/* System */

+#define AM_DIR	0x10	/* Directory */

+#define AM_ARC	0x20	/* Archive */

+

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* FF_DEFINED */

diff --git a/fw/fe310/fsfat/ffconf.h b/fw/fe310/fsfat/ffconf.h
new file mode 100644
index 0000000..e822ee0
--- /dev/null
+++ b/fw/fe310/fsfat/ffconf.h
@@ -0,0 +1,301 @@
+/*---------------------------------------------------------------------------/

+/  FatFs Functional Configurations

+/---------------------------------------------------------------------------*/

+

+#define FFCONF_DEF	86631	/* Revision ID */

+

+/*---------------------------------------------------------------------------/

+/ Function Configurations

+/---------------------------------------------------------------------------*/

+

+#define FF_FS_READONLY	0

+/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)

+/  Read-only configuration removes writing API functions, f_write(), f_sync(),

+/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()

+/  and optional writing functions as well. */

+

+

+#define FF_FS_MINIMIZE	0

+/* This option defines minimization level to remove some basic API functions.

+/

+/   0: Basic functions are fully enabled.

+/   1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()

+/      are removed.

+/   2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.

+/   3: f_lseek() function is removed in addition to 2. */

+

+

+#define FF_USE_FIND		1

+/* This option switches filtered directory read functions, f_findfirst() and

+/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */

+

+

+#define FF_USE_MKFS		1

+/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */

+

+

+#define FF_USE_FASTSEEK	0

+/* This option switches fast seek function. (0:Disable or 1:Enable) */

+

+

+#define FF_USE_EXPAND	1

+/* This option switches f_expand function. (0:Disable or 1:Enable) */

+

+

+#define FF_USE_CHMOD	1

+/* This option switches attribute manipulation functions, f_chmod() and f_utime().

+/  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */

+

+

+#define FF_USE_LABEL	1

+/* This option switches volume label functions, f_getlabel() and f_setlabel().

+/  (0:Disable or 1:Enable) */

+

+

+#define FF_USE_FORWARD	1

+/* This option switches f_forward() function. (0:Disable or 1:Enable) */

+

+

+#define FF_USE_STRFUNC	0

+#define FF_PRINT_LLI	0

+#define FF_PRINT_FLOAT	0

+#define FF_STRF_ENCODE	0

+/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and

+/  f_printf().

+/

+/   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.

+/   1: Enable without LF-CRLF conversion.

+/   2: Enable with LF-CRLF conversion.

+/

+/  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2

+   makes f_printf() support floating point argument. These features want C99 or later.

+/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character

+/  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE

+/  to be read/written via those functions.

+/

+/   0: ANSI/OEM in current CP

+/   1: Unicode in UTF-16LE

+/   2: Unicode in UTF-16BE

+/   3: Unicode in UTF-8

+*/

+

+

+/*---------------------------------------------------------------------------/

+/ Locale and Namespace Configurations

+/---------------------------------------------------------------------------*/

+

+#define FF_CODE_PAGE	437

+/* This option specifies the OEM code page to be used on the target system.

+/  Incorrect code page setting can cause a file open failure.

+/

+/   437 - U.S.

+/   720 - Arabic

+/   737 - Greek

+/   771 - KBL

+/   775 - Baltic

+/   850 - Latin 1

+/   852 - Latin 2

+/   855 - Cyrillic

+/   857 - Turkish

+/   860 - Portuguese

+/   861 - Icelandic

+/   862 - Hebrew

+/   863 - Canadian French

+/   864 - Arabic

+/   865 - Nordic

+/   866 - Russian

+/   869 - Greek 2

+/   932 - Japanese (DBCS)

+/   936 - Simplified Chinese (DBCS)

+/   949 - Korean (DBCS)

+/   950 - Traditional Chinese (DBCS)

+/     0 - Include all code pages above and configured by f_setcp()

+*/

+

+

+#define FF_USE_LFN		0

+#define FF_MAX_LFN		255

+/* The FF_USE_LFN switches the support for LFN (long file name).

+/

+/   0: Disable LFN. FF_MAX_LFN has no effect.

+/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.

+/   2: Enable LFN with dynamic working buffer on the STACK.

+/   3: Enable LFN with dynamic working buffer on the HEAP.

+/

+/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function

+/  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and

+/  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.

+/  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can

+/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN

+/  specification.

+/  When use stack for the working buffer, take care on stack overflow. When use heap

+/  memory for the working buffer, memory management functions, ff_memalloc() and

+/  ff_memfree() exemplified in ffsystem.c, need to be added to the project. */

+

+

+#define FF_LFN_UNICODE	0

+/* This option switches the character encoding on the API when LFN is enabled.

+/

+/   0: ANSI/OEM in current CP (TCHAR = char)

+/   1: Unicode in UTF-16 (TCHAR = WCHAR)

+/   2: Unicode in UTF-8 (TCHAR = char)

+/   3: Unicode in UTF-32 (TCHAR = DWORD)

+/

+/  Also behavior of string I/O functions will be affected by this option.

+/  When LFN is not enabled, this option has no effect. */

+

+

+#define FF_LFN_BUF		255

+#define FF_SFN_BUF		12

+/* This set of options defines size of file name members in the FILINFO structure

+/  which is used to read out directory items. These values should be suffcient for

+/  the file names to read. The maximum possible length of the read file name depends

+/  on character encoding. When LFN is not enabled, these options have no effect. */

+

+

+#define FF_FS_RPATH		0

+/* This option configures support for relative path.

+/

+/   0: Disable relative path and remove related functions.

+/   1: Enable relative path. f_chdir() and f_chdrive() are available.

+/   2: f_getcwd() function is available in addition to 1.

+*/

+

+

+/*---------------------------------------------------------------------------/

+/ Drive/Volume Configurations

+/---------------------------------------------------------------------------*/

+

+#define FF_VOLUMES		1

+/* Number of volumes (logical drives) to be used. (1-10) */

+

+

+#define FF_STR_VOLUME_ID	0

+#define FF_VOLUME_STRS		"RAM","NAND","CF","SD","SD2","USB","USB2","USB3"

+/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.

+/  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive

+/  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each

+/  logical drives. Number of items must not be less than FF_VOLUMES. Valid

+/  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are

+/  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is

+/  not defined, a user defined volume string table needs to be defined as:

+/

+/  const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...

+*/

+

+

+#define FF_MULTI_PARTITION	1

+/* This option switches support for multiple volumes on the physical drive.

+/  By default (0), each logical drive number is bound to the same physical drive

+/  number and only an FAT volume found on the physical drive will be mounted.

+/  When this function is enabled (1), each logical drive number can be bound to

+/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()

+/  funciton will be available. */

+

+

+#define FF_MIN_SS		512

+#define FF_MAX_SS		512

+/* This set of options configures the range of sector size to be supported. (512,

+/  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and

+/  harddisk, but a larger value may be required for on-board flash memory and some

+/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured

+/  for variable sector size mode and disk_ioctl() function needs to implement

+/  GET_SECTOR_SIZE command. */

+

+

+#define FF_LBA64		0

+/* This option switches support for 64-bit LBA. (0:Disable or 1:Enable)

+/  To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */

+

+

+#define FF_MIN_GPT		0x10000000

+/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and

+/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */

+

+

+#define FF_USE_TRIM		1

+/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)

+/  To enable Trim function, also CTRL_TRIM command should be implemented to the

+/  disk_ioctl() function. */

+

+

+

+/*---------------------------------------------------------------------------/

+/ System Configurations

+/---------------------------------------------------------------------------*/

+

+#define FF_FS_TINY		1

+/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)

+/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.

+/  Instead of private sector buffer eliminated from the file object, common sector

+/  buffer in the filesystem object (FATFS) is used for the file data transfer. */

+

+

+#define FF_FS_EXFAT		0

+/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)

+/  To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)

+/  Note that enabling exFAT discards ANSI C (C89) compatibility. */

+

+

+#define FF_FS_NORTC		1

+#define FF_NORTC_MON	1

+#define FF_NORTC_MDAY	1

+#define FF_NORTC_YEAR	2020

+/* The option FF_FS_NORTC switches timestamp functiton. If the system does not have

+/  any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable

+/  the timestamp function. Every object modified by FatFs will have a fixed timestamp

+/  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.

+/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be

+/  added to the project to read current time form real-time clock. FF_NORTC_MON,

+/  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.

+/  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */

+

+

+#define FF_FS_NOFSINFO	0

+/* If you need to know correct free space on the FAT32 volume, set bit 0 of this

+/  option, and f_getfree() function at first time after volume mount will force

+/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.

+/

+/  bit0=0: Use free cluster count in the FSINFO if available.

+/  bit0=1: Do not trust free cluster count in the FSINFO.

+/  bit1=0: Use last allocated cluster number in the FSINFO if available.

+/  bit1=1: Do not trust last allocated cluster number in the FSINFO.

+*/

+

+

+#define FF_FS_LOCK		0

+/* The option FF_FS_LOCK switches file lock function to control duplicated file open

+/  and illegal operation to open objects. This option must be 0 when FF_FS_READONLY

+/  is 1.

+/

+/  0:  Disable file lock function. To avoid volume corruption, application program

+/      should avoid illegal open, remove and rename to the open objects.

+/  >0: Enable file lock function. The value defines how many files/sub-directories

+/      can be opened simultaneously under file lock control. Note that the file

+/      lock control is independent of re-entrancy. */

+

+

+/* #include <somertos.h>	// O/S definitions */

+#define FF_FS_REENTRANT	0

+#define FF_FS_TIMEOUT	1000

+#define FF_SYNC_t		HANDLE

+/* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs

+/  module itself. Note that regardless of this option, file access to different

+/  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()

+/  and f_fdisk() function, are always not re-entrant. Only file/directory access

+/  to the same volume is under control of this function.

+/

+/   0: Disable re-entrancy. FF_FS_TIMEOUT and FF_SYNC_t have no effect.

+/   1: Enable re-entrancy. Also user provided synchronization handlers,

+/      ff_req_grant(), ff_rel_grant(), ff_del_syncobj() and ff_cre_syncobj()

+/      function, must be added to the project. Samples are available in

+/      option/syscall.c.

+/

+/  The FF_FS_TIMEOUT defines timeout period in unit of time tick.

+/  The FF_SYNC_t defines O/S dependent sync object type. e.g. HANDLE, ID, OS_EVENT*,

+/  SemaphoreHandle_t and etc. A header file for O/S definitions needs to be

+/  included somewhere in the scope of ff.h. */

+

+

+

+/*--- End of configuration options ---*/