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-rw-r--r--code/fe310/eos/spi.c52
1 files changed, 26 insertions, 26 deletions
diff --git a/code/fe310/eos/spi.c b/code/fe310/eos/spi.c
index 3c45ad9..034ae99 100644
--- a/code/fe310/eos/spi.c
+++ b/code/fe310/eos/spi.c
@@ -21,9 +21,9 @@
extern EOSMsgQ _eos_event_q;
static uint8_t spi_dev;
-static uint8_t spi_dev_cs;
+static uint8_t spi_dev_cs_pin;
static uint8_t spi_state_flags;
-static uint8_t spi_wait;
+static unsigned char spi_in_xchg;
uint32_t _eos_spi_state_len = 0;
uint32_t _eos_spi_state_idx_tx = 0;
@@ -42,17 +42,11 @@ static void spi_handler_evt(unsigned char type, unsigned char *buffer, uint16_t
}
static void spi_flush(void) {
- SPI1_REG(SPI_REG_RXCTRL) = SPI_TXWM(1);
+ SPI1_REG(SPI_REG_TXCTRL) = SPI_TXWM(1);
while (!(SPI1_REG(SPI_REG_IP) & SPI_IP_TXWM));
while (!(SPI1_REG(SPI_REG_RXFIFO) & SPI_RXFIFO_EMPTY));
}
-static void spi_xchg_done(void) {
- spi_state_flags &= ~SPI_FLAG_XCHG;
- if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) eos_spi_cs_clear();
- SPI1_REG(SPI_REG_IE) = 0x0;
-}
-
static void spi_xchg_wait(void) {
volatile uint8_t done = 0;
@@ -62,11 +56,11 @@ static void spi_xchg_wait(void) {
if (!done) asm volatile ("wfi");
set_csr(mstatus, MSTATUS_MIE);
}
- spi_wait = 0;
+ spi_in_xchg = 0;
}
void eos_spi_init(void) {
- GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << spi_dev_cs);
+ GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << SPI_CS_PIN_CAM);
GPIO_REG(GPIO_INPUT_EN) &= ~(1 << SPI_CS_PIN_CAM);
GPIO_REG(GPIO_OUTPUT_EN) |= (1 << SPI_CS_PIN_CAM);
GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << SPI_CS_PIN_CAM);
@@ -103,7 +97,7 @@ void eos_spi_dev_acquire(unsigned char dev) {
SPI1_REG(SPI_REG_CSID) = SPI_CS_IDX_CARD;
break;
case EOS_SPI_DEV_CAM:
- spi_dev_cs = SPI_CS_PIN_CAM;
+ spi_dev_cs_pin = SPI_CS_PIN_CAM;
SPI1_REG(SPI_REG_SCKDIV) = SPI_DIV_CAM;
SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_OFF;
SPI1_REG(SPI_REG_CSID) = SPI_CS_IDX_NONE;
@@ -113,7 +107,7 @@ void eos_spi_dev_acquire(unsigned char dev) {
}
void eos_spi_dev_release(void) {
- if (spi_wait) spi_xchg_wait();
+ if (spi_in_xchg) spi_xchg_wait();
if (spi_state_flags & EOS_SPI_FLAG_TX) spi_flush();
if (!(spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_clear();
@@ -122,10 +116,10 @@ void eos_spi_dev_release(void) {
}
void eos_spi_xchg(unsigned char *buffer, uint16_t len, uint8_t flags) {
- if (spi_wait) spi_xchg_wait();
+ if (spi_in_xchg) spi_xchg_wait();
if (!(flags & EOS_SPI_FLAG_TX) && (spi_state_flags & EOS_SPI_FLAG_TX)) spi_flush();
- spi_wait=1;
+ spi_in_xchg=1;
spi_state_flags &= 0xF0;
spi_state_flags |= (SPI_FLAG_XCHG | flags);
_eos_spi_state_buf = buffer;
@@ -138,6 +132,12 @@ void eos_spi_xchg(unsigned char *buffer, uint16_t len, uint8_t flags) {
SPI1_REG(SPI_REG_IE) = SPI_IP_TXWM;
}
+static void spi_xchg_done(void) {
+ spi_state_flags &= ~SPI_FLAG_XCHG;
+ if (!(spi_state_flags & (EOS_SPI_FLAG_MORE | SPI_FLAG_CS))) eos_spi_cs_clear();
+ SPI1_REG(SPI_REG_IE) = 0x0;
+}
+
void eos_spi_xchg_handler(void) {
int i;
uint16_t sz_chunk = MIN(_eos_spi_state_len - _eos_spi_state_idx_tx, SPI_SIZE_CHUNK);
@@ -175,7 +175,7 @@ void eos_spi_xchg_handler(void) {
void eos_spi_cs_set(void) {
/* cs low */
if (SPI1_REG(SPI_REG_CSMODE) == SPI_CSMODE_OFF) {
- GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << spi_dev_cs);
+ GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << spi_dev_cs_pin);
} else {
SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_HOLD;
}
@@ -185,7 +185,7 @@ void eos_spi_cs_set(void) {
void eos_spi_cs_clear(void) {
/* cs high */
if (SPI1_REG(SPI_REG_CSMODE) == SPI_CSMODE_OFF) {
- GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << spi_dev_cs);
+ GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << spi_dev_cs_pin);
} else {
SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_AUTO;
}
@@ -196,12 +196,12 @@ uint8_t eos_spi_xchg8(uint8_t data, uint8_t flags) {
volatile uint32_t x = 0;
uint8_t rx = !(flags & EOS_SPI_FLAG_TX);
- if (spi_wait) spi_xchg_wait();
+ if (spi_in_xchg) spi_xchg_wait();
if (rx && (spi_state_flags & EOS_SPI_FLAG_TX)) spi_flush();
spi_state_flags &= 0xF0;
spi_state_flags |= flags;
- if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
+ if ((flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = data;
@@ -210,7 +210,7 @@ uint8_t eos_spi_xchg8(uint8_t data, uint8_t flags) {
while ((x = SPI1_REG(SPI_REG_RXFIFO)) & SPI_RXFIFO_EMPTY);
}
- if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && !(spi_state_flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
+ if ((flags & EOS_SPI_FLAG_AUTOCS) && !(flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
return x & 0xFF;
}
@@ -220,12 +220,12 @@ uint16_t eos_spi_xchg16(uint16_t data, uint8_t flags) {
uint8_t rx = !(flags & EOS_SPI_FLAG_TX);
uint16_t r;
- if (spi_wait) spi_xchg_wait();
+ if (spi_in_xchg) spi_xchg_wait();
if (rx && (spi_state_flags & EOS_SPI_FLAG_TX)) spi_flush();
spi_state_flags &= 0xF0;
spi_state_flags |= flags;
- if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
+ if ((flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = (data & 0xFF00) >> 8;
@@ -239,7 +239,7 @@ uint16_t eos_spi_xchg16(uint16_t data, uint8_t flags) {
r |= x & 0xFF;
}
- if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && !(spi_state_flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
+ if ((flags & EOS_SPI_FLAG_AUTOCS) && !(flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
return x & 0xFF;
}
@@ -249,12 +249,12 @@ uint32_t eos_spi_xchg32(uint32_t data, uint8_t flags) {
uint8_t rx = !(flags & EOS_SPI_FLAG_TX);
uint32_t r;
- if (spi_wait) spi_xchg_wait();
+ if (spi_in_xchg) spi_xchg_wait();
if (rx && (spi_state_flags & EOS_SPI_FLAG_TX)) spi_flush();
spi_state_flags &= 0xF0;
spi_state_flags |= flags;
- if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
+ if ((flags & EOS_SPI_FLAG_AUTOCS) && (spi_state_flags & SPI_FLAG_CS)) eos_spi_cs_set();
while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = (data & 0xFF000000) >> 24;
@@ -276,7 +276,7 @@ uint32_t eos_spi_xchg32(uint32_t data, uint8_t flags) {
r |= x & 0xFF;
}
- if ((spi_state_flags & EOS_SPI_FLAG_AUTOCS) && !(spi_state_flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
+ if ((flags & EOS_SPI_FLAG_AUTOCS) && !(flags & EOS_SPI_FLAG_MORE)) eos_spi_cs_clear();
return r;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:20:19 +0000