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-rw-r--r--code/fe310/eos/i2s.c144
-rw-r--r--code/fe310/eos/i2s_def.h19
-rw-r--r--code/fe310/eos/trap_entry.S318
3 files changed, 278 insertions, 203 deletions
diff --git a/code/fe310/eos/i2s.c b/code/fe310/eos/i2s.c
index 9ec5a71..42e185b 100644
--- a/code/fe310/eos/i2s.c
+++ b/code/fe310/eos/i2s.c
@@ -1,4 +1,5 @@
#include <unistd.h>
+#include <stdio.h>
#include "encoding.h"
#include "platform.h"
@@ -10,16 +11,17 @@
#include "i2s.h"
#include "i2s_def.h"
-#define I2S_PWM_REG_CK PWM0_REG
-#define I2S_PWM_REG_WS PWM2_REG
+#define I2S_PWM_REG_CK PWM0_REG
+#define I2S_PWM_REG_WS_SPK PWM1_REG
+#define I2S_PWM_REG_WS_MIC PWM2_REG
#define EOS_ABUF_IDX_MASK(IDX, SIZE) ((IDX) & ((SIZE) - 1))
EOSABuf _eos_i2s_mic_buf;
EOSABuf _eos_i2s_spk_buf;
uint32_t _eos_i2s_ck_period = 0;
-uint32_t _eos_i2s_mic_volume = 3;
-uint32_t _eos_i2s_spk_volume = 3;
+uint32_t _eos_i2s_mic_volume = 0;
+uint32_t _eos_i2s_spk_volume = 4;
static eos_evt_fptr_t evt_handler[I2S_MAX_HANDLER];
uint32_t _eos_i2s_evt_enable[I2S_MAX_HANDLER];
uint32_t _eos_i2s_wm[I2S_MAX_HANDLER];
@@ -92,31 +94,35 @@ void eos_i2s_init(uint32_t sample_rate) {
_eos_i2s_ck_period = (f / (sample_rate * 64)) & ~I2S_PWM_SCALE_CK_MASK;
uint32_t _ck_period_scaled = _eos_i2s_ck_period >> I2S_PWM_SCALE_CK;
- GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_LR);
- GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_LR);
- GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_LR);
GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK);
GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK);
GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CK);
- GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_WS);
- GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS);
- GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS);
+ GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK_SW);
+ GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK_SW);
+ GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CK_SW);
- GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CKE);
- GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CKE);
- GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CKE);
+ GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK_SR);
+ GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK_SR);
+ GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CK_SR);
- GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CKF);
- GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CKF);
- GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CKF);
+ GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_WS_MIC);
+ GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS_MIC);
+ GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS_MIC);
- GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD);
- GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD);
- GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_SD);
+ GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_WS_SPK);
+ GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS_SPK);
+ GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS_SPK);
- GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << I2S_PIN_LR);
+ GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD_IN);
+ GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD_IN);
+ GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_SD_IN);
+
+ GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_SD_OUT);
+ GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD_OUT);
+ GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_SD_OUT);
+ GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_SD_OUT);
I2S_PWM_REG_CK(PWM_CFG) = 0;
I2S_PWM_REG_CK(PWM_COUNT) = 0;
@@ -125,12 +131,18 @@ void eos_i2s_init(uint32_t sample_rate) {
I2S_PWM_REG_CK(PWM_CMP2) = 0;
I2S_PWM_REG_CK(PWM_CMP3) = 0;
- I2S_PWM_REG_WS(PWM_CFG) = 0;
- I2S_PWM_REG_WS(PWM_COUNT) = 0;
- I2S_PWM_REG_WS(PWM_CMP0) = (_eos_i2s_ck_period + 1) * 64 - 1;
- I2S_PWM_REG_WS(PWM_CMP1) = (_eos_i2s_ck_period + 1) * 32;
- I2S_PWM_REG_WS(PWM_CMP2) = (_eos_i2s_ck_period + 1) * _eos_i2s_mic_volume;
- I2S_PWM_REG_WS(PWM_CMP3) = I2S_PWM_REG_WS(PWM_CMP2) + (_eos_i2s_ck_period + 1) * 16;
+ I2S_PWM_REG_WS_MIC(PWM_CFG) = 0;
+ I2S_PWM_REG_WS_MIC(PWM_COUNT) = 0;
+ I2S_PWM_REG_WS_MIC(PWM_CMP0) = (_eos_i2s_ck_period + 1) * 64 - 1;
+ I2S_PWM_REG_WS_MIC(PWM_CMP1) = (_eos_i2s_ck_period + 1) * 32;
+ I2S_PWM_REG_WS_MIC(PWM_CMP2) = (_eos_i2s_ck_period + 1) * _eos_i2s_mic_volume;
+ I2S_PWM_REG_WS_MIC(PWM_CMP3) = I2S_PWM_REG_WS_MIC(PWM_CMP2) + (_eos_i2s_ck_period + 1) * 17;
+
+ I2S_PWM_REG_WS_SPK(PWM_CFG) = 0;
+ I2S_PWM_REG_WS_SPK(PWM_COUNT) = 0;
+ I2S_PWM_REG_WS_SPK(PWM_CMP0) = (_eos_i2s_ck_period + 1) * 64 - 1;
+ I2S_PWM_REG_WS_SPK(PWM_CMP1) = (_eos_i2s_ck_period + 1) * 32;
+ I2S_PWM_REG_WS_SPK(PWM_CMP2) = (_eos_i2s_ck_period + 1) * 33;
_eos_i2s_evt_enable[I2S_EVT_MIC] = 0;
_eos_i2s_evt_enable[I2S_EVT_SPK] = 0;
@@ -145,35 +157,47 @@ void eos_i2s_init(uint32_t sample_rate) {
eos_evtq_set_handler(EOS_EVT_AUDIO, audio_handler, EOS_EVT_FLAG_WRAP);
}
+extern void _eos_set_pwm(void);
+
void eos_i2s_start(void) {
_eos_i2s_evt_enable[I2S_EVT_MIC] = 1;
_eos_i2s_evt_enable[I2S_EVT_SPK] = 1;
eos_intr_set_priority(I2S_IRQ_WS_ID, I2S_IRQ_WS_PRIORITY);
- I2S_PWM_REG_CK(PWM_COUNT) = 0;
- I2S_PWM_REG_WS(PWM_COUNT) = 0;
+ I2S_PWM_REG_CK(PWM_COUNT) = 0;
+ I2S_PWM_REG_WS_MIC(PWM_COUNT) = (_eos_i2s_ck_period + 1) * 32;
+ I2S_PWM_REG_WS_SPK(PWM_COUNT) = (_eos_i2s_ck_period + 1) * 32 + (_eos_i2s_ck_period + 1) * (_eos_i2s_spk_volume + 1 - _eos_i2s_mic_volume) + (_eos_i2s_ck_period + 1) / 2;
- I2S_PWM_REG_CK(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | I2S_PWM_SCALE_CK;
- I2S_PWM_REG_WS(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | PWM_CFG_CMP2GANG;
+ _eos_set_pwm();
+ /*
+ I2S_PWM_REG_CK(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | I2S_PWM_SCALE_CK;
+ I2S_PWM_REG_WS_MIC(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | PWM_CFG_CMP2GANG;
+ I2S_PWM_REG_WS_SPK(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP;
+ */
- GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_CK);
- GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CK);
+ GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_CK);
+ GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CK);
- GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_WS);
- GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_WS);
+ GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_CK_SW);
+ GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CK_SW);
+
+ GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_WS_MIC);
+ GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_WS_MIC);
- GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_CKE);
- GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CKE);
+ GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_WS_SPK);
+ GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_WS_SPK);
- GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CKF);
+ GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SR);
}
void eos_i2s_stop(void) {
- I2S_PWM_REG_CK(PWM_CFG) = 0;
- I2S_PWM_REG_WS(PWM_CFG) = 0;
- I2S_PWM_REG_CK(PWM_COUNT) = 0;
- I2S_PWM_REG_WS(PWM_COUNT) = 0;
+ I2S_PWM_REG_CK(PWM_CFG) = 0;
+ I2S_PWM_REG_WS_MIC(PWM_CFG) = 0;
+ I2S_PWM_REG_WS_SPK(PWM_CFG) = 0;
+ I2S_PWM_REG_CK(PWM_COUNT) = 0;
+ I2S_PWM_REG_WS_MIC(PWM_COUNT) = 0;
+ I2S_PWM_REG_WS_SPK(PWM_COUNT) = 0;
eos_intr_set_priority(I2S_IRQ_WS_ID, 0);
eos_intr_set_priority(I2S_IRQ_SD_ID, 0);
@@ -181,17 +205,20 @@ void eos_i2s_stop(void) {
eos_i2s_mic_init(NULL, 0);
eos_i2s_spk_init(NULL, 0);
- GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_CK);
- GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_CK);
-
- GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_WS);
- GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_WS);
+ GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_CK);
+ GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_CK);
- GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_CKE);
- GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_CKE);
+ GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_CK_SW);
+ GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_CK_SW);
+
+ GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_WS_MIC);
+ GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_WS_MIC);
- GPIO_REG(GPIO_OUTPUT_VAL) &= ~((1 << I2S_PIN_CK) | (1 << I2S_PIN_WS) | (1 << I2S_PIN_CKE));
- GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CKF);
+ GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_WS_SPK);
+ GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_WS_SPK);
+
+ GPIO_REG(GPIO_OUTPUT_VAL) &= ~((1 << I2S_PIN_CK) | (1 << I2S_PIN_CK_SR) | (1 << I2S_PIN_WS_MIC) | (1 << I2S_PIN_WS_SPK));
+ GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SW);
}
void eos_i2s_mic_init(uint8_t *mic_arr, uint16_t mic_arr_size) {
@@ -224,12 +251,14 @@ uint16_t eos_i2s_mic_read(uint8_t *sample, uint16_t ssize) {
int i;
uint16_t _ssize = 0;
- for (i=0; i<ssize/I2S_ABUF_SIZE_CHUNK && _ssize == i*I2S_ABUF_SIZE_CHUNK; i++) {
+ for (i=0; i<ssize/I2S_ABUF_SIZE_CHUNK; i++) {
clear_csr(mstatus, MSTATUS_MIE);
- _ssize += _abuf_read(&_eos_i2s_mic_buf, sample+i*I2S_ABUF_SIZE_CHUNK, I2S_ABUF_SIZE_CHUNK);
+ uint16_t rv = _abuf_read(&_eos_i2s_mic_buf, sample+i*I2S_ABUF_SIZE_CHUNK, I2S_ABUF_SIZE_CHUNK);
set_csr(mstatus, MSTATUS_MIE);
+ if (rv != I2S_ABUF_SIZE_CHUNK) return _ssize + rv;
+ _ssize += rv;
}
- if ((ssize > _ssize) && (_ssize == i*I2S_ABUF_SIZE_CHUNK)) {
+ if (ssize > _ssize) {
clear_csr(mstatus, MSTATUS_MIE);
_ssize += _abuf_read(&_eos_i2s_mic_buf, sample+i*I2S_ABUF_SIZE_CHUNK, ssize - _ssize);
set_csr(mstatus, MSTATUS_MIE);
@@ -272,12 +301,15 @@ uint16_t eos_i2s_spk_len(void) {
uint16_t eos_i2s_spk_write(uint8_t *sample, uint16_t ssize) {
int i;
uint16_t _ssize = 0;
- for (i=0; i<ssize/I2S_ABUF_SIZE_CHUNK && _ssize == i*I2S_ABUF_SIZE_CHUNK; i++) {
+
+ for (i=0; i<ssize/I2S_ABUF_SIZE_CHUNK; i++) {
clear_csr(mstatus, MSTATUS_MIE);
- _ssize += _abuf_write(&_eos_i2s_spk_buf, sample+i*I2S_ABUF_SIZE_CHUNK, I2S_ABUF_SIZE_CHUNK);
+ uint16_t rv = _abuf_write(&_eos_i2s_spk_buf, sample+i*I2S_ABUF_SIZE_CHUNK, I2S_ABUF_SIZE_CHUNK);
set_csr(mstatus, MSTATUS_MIE);
+ if (rv != I2S_ABUF_SIZE_CHUNK) return _ssize + rv;
+ _ssize += rv;
}
- if ((ssize > _ssize) && (_ssize == i*I2S_ABUF_SIZE_CHUNK)) {
+ if (ssize > _ssize) {
clear_csr(mstatus, MSTATUS_MIE);
_ssize += _abuf_write(&_eos_i2s_spk_buf, sample+i*I2S_ABUF_SIZE_CHUNK, ssize - _ssize);
set_csr(mstatus, MSTATUS_MIE);
diff --git a/code/fe310/eos/i2s_def.h b/code/fe310/eos/i2s_def.h
index e924776..fc22b49 100644
--- a/code/fe310/eos/i2s_def.h
+++ b/code/fe310/eos/i2s_def.h
@@ -2,21 +2,20 @@
#define I2S_EVT_SPK 0x1
#define I2S_MAX_HANDLER 2
-#define I2S_PIN_CK 1 // pin 9
-#define I2S_PIN_CKE 12 // pin 18
-#define I2S_PIN_CKF 18 // pin 2
-#define I2S_PIN_SD 13 // pin 19
-#define I2S_PIN_WS 11 // pin 17
+#define I2S_PIN_CK 1
+#define I2S_PIN_CK_SW 12
+#define I2S_PIN_CK_SR 18
+#define I2S_PIN_WS_MIC 11
+#define I2S_PIN_WS_SPK 19
+#define I2S_PIN_SD_IN 13
+#define I2S_PIN_SD_OUT 20
-#define I2S_PIN_LR 13 // pin 19
-
-#define I2S_IRQ_WS_ID (INT_PWM2_BASE + 0)
-#define I2S_IRQ_SD_ID (INT_PWM2_BASE + 3)
+#define I2S_IRQ_WS_ID (INT_PWM1_BASE + 0)
+#define I2S_IRQ_SD_ID (INT_PWM1_BASE + 2)
#define I2S_IRQ_WS_PRIORITY 6
#define I2S_IRQ_SD_PRIORITY 7
-#define I2S_SMPL_BITS 13
#define I2S_IDLE_CYCLES 8
#define I2S_PWM_SCALE_CK 2
diff --git a/code/fe310/eos/trap_entry.S b/code/fe310/eos/trap_entry.S
index 82a553a..bed2524 100644
--- a/code/fe310/eos/trap_entry.S
+++ b/code/fe310/eos/trap_entry.S
@@ -29,8 +29,9 @@
#define INT_PWM1_BASE 44
#define INT_PWM2_BASE 48
-#define I2S_PWM_CTRL_ADDR_CK PWM0_CTRL_ADDR
-#define I2S_PWM_CTRL_ADDR_WS PWM2_CTRL_ADDR
+#define I2S_PWM_CTRL_ADDR_CK PWM0_CTRL_ADDR
+#define I2S_PWM_CTRL_ADDR_WS_SPK PWM1_CTRL_ADDR
+#define I2S_PWM_CTRL_ADDR_WS_MIC PWM2_CTRL_ADDR
#define IOF_SPI1_SS0 2
#define IOF_SPI1_SS1 8
@@ -104,59 +105,140 @@ evtq_push:
i2s_handler_sd:
# exit if too early
- li x18, I2S_PWM_CTRL_ADDR_WS
+ li x18, I2S_PWM_CTRL_ADDR_WS_SPK
lw x8, PWM_COUNT(x18)
- lw x9, PWM_CMP3(x18)
+ lw x9, PWM_CMP2(x18)
bltu x8, x9, i2s_handler_sd_exit
- # read shift reg value -> x8
+ # disable sd irq
+ li x18, PLIC_PRIORITY
+ sw x0, 4*I2S_IRQ_SD_ID(x18)
+
+ # pop from spk buf -> x8
mv x8, x0
- li x23, GPIO_CTRL_ADDR
- lw x22, GPIO_OUTPUT_VAL(x23)
- li x9, (0x1 << I2S_PIN_CKF)
- or x22, x22, x9
+ la x9, _eos_i2s_spk_buf
+ lhu x18, I2S_ABUF_OFF_IDXR(x9)
+ lhu x19, I2S_ABUF_OFF_IDXW(x9)
+ beq x18, x19, i2s_handler_sd_xchg
+ lhu x19, I2S_ABUF_OFF_SIZE(x9)
+
+ addi x19, x19, -1
+ and x19, x19, x18
+ lw x8, I2S_ABUF_OFF_ARRAY(x9)
+ add x19, x19, x8
+ lbu x8, 0(x19)
+
+ addi x18, x18, 1
+ sh x18, I2S_ABUF_OFF_IDXR(x9)
+
+ # aLaw decode -> x8
+ xori x8, x8, 0x55
+ andi x9, x8, 0x80
+ beqz x9, 0f
+ li x9, 1
+ slli x9, x9, 7
not x9, x9
- and x21, x22, x9
- li x20, (0x1 << I2S_PIN_SD)
- li x19, (32 - I2S_SMPL_BITS)
- li x18, 32
-
+ and x8, x8, x9
+ li x9, -1
0:
- addi x18, x18, -1
- # ck high
- sw x21, GPIO_OUTPUT_VAL(x23)
+ andi x18, x8, 0xf0
+ srli x18, x18, 4
+ addi x18, x18, 4
+
+ li x19, 4
+ beq x18, x19, 1f
+
+ andi x8, x8, 0x0f
+ addi x19, x18, -4
+ sll x8, x8, x19
+ li x19, 1
+ sll x19, x19, x18
+ or x8, x8, x19
+
+ li x19, 1
+ addi x18, x18, -5
+ sll x19, x19, x18
+ or x8, x8, x19
+ j 2f
+1:
+ slli x8, x8, 1
+ ori x8, x8, 1
+2:
+ beqz x9, i2s_handler_sd_xchg
+ mul x8, x8, x9
+
+i2s_handler_sd_xchg:
+ # slli x8, x8, 4
+ # li x8, 0xAf0A
+ # li x8, 0x50f5
+ # read/write shift reg: x8 -> sr -> x8
+ li x18, GPIO_CTRL_ADDR
+ li x19, (0x1 << I2S_PIN_SD_IN)
+ li x20, (0x1 << I2S_PIN_SD_OUT)
+ li x21, (0x1 << I2S_PIN_CK_SR)
+ lw x22, GPIO_OUTPUT_VAL(x18)
+
+ lw x9, GPIO_OUTPUT_EN(x18)
+ or x9, x9, x20
+ sw x9, GPIO_OUTPUT_EN(x18)
+
+ not x20, x20
+ or x22, x22, x21
+
+ li x23, 17
+0:
+ addi x23, x23, -1
+ beqz x23, 1f
+ lw x9, GPIO_INPUT_VAL(x18)
+ and x9, x9, x19
+ srli x9, x9, I2S_PIN_SD_IN
+ slli x8, x8, 1
+ or x8, x8, x9
+
+1:
# idle
li x9, I2S_IDLE_CYCLES
-1:
+2:
addi x9, x9, -1
- bnez x9, 1b
-
- lw x9, GPIO_INPUT_VAL(x23)
- # ck low
- sw x22, GPIO_OUTPUT_VAL(x23)
+ bnez x9, 2b
- and x9, x9, x20
- srli x9, x9, I2S_PIN_SD
- sll x9, x9, x18
- or x8, x8, x9
- beq x19, x18, 3f
+ # ck high
+ xor x22, x22, x21
+ sw x22, GPIO_OUTPUT_VAL(x18)
+
+ li x9, 0x1
+ slli x9, x9, 16
+ and x9, x9, x8
+#if I2S_PIN_SD_OUT > 16
+ slli x9, x9, (I2S_PIN_SD_OUT - 16)
+#else
+ srli x9, x9, (16 - I2S_PIN_SD_OUT)
+#endif
+ and x22, x22, x20
+ or x22, x22, x9
# idle
li x9, I2S_IDLE_CYCLES
2:
addi x9, x9, -1
bnez x9, 2b
-
+
+ # ck low
+ xor x22, x22, x21
+ sw x22, GPIO_OUTPUT_VAL(x18)
+
+ beqz x23, 3f
j 0b
3:
- srai x8, x8, (32 - I2S_SMPL_BITS)
-
- # disable sd irq
- li x18, PLIC_PRIORITY
- sw x0, 4*I2S_IRQ_SD_ID(x18)
-
+ slli x8, x8, 16
+ srai x8, x8, 16
+
+ lw x9, GPIO_OUTPUT_EN(x18)
+ and x9, x9, x20
+ sw x9, GPIO_OUTPUT_EN(x18)
+
# aLaw encode -> x8
li x18, 0x800
li x19, 7
@@ -182,7 +264,7 @@ i2s_handler_sd:
slli x19, x19, 4
or x8, x8, x19
bgez x8, 3f
- ori x8, x8, 0x80
+ ori x8, x8, 0x80
3:
xori x8, x8, 0x55
andi x8, x8, 0xff
@@ -206,97 +288,25 @@ i2s_handler_sd:
sb x8, 0(x20)
addi x18, x18, 1
-
+
0:
# check for push to event queue
la x9, _eos_i2s_wm
lw x20, 0(x9)
- beqz x20, i2s_handler_sd_out
- bltu x18, x20, i2s_handler_sd_out
+ beqz x20, i2s_handler_sd_exit
+ bltu x18, x20, i2s_handler_sd_exit
la x9, _eos_i2s_evt_enable
lw x18, 0(x9)
- beqz x18, i2s_handler_sd_out
+ beqz x18, i2s_handler_sd_exit
sw x0, 0(x9)
# push to event queue
jal x20, evtq_push
- beqz x8, i2s_handler_sd_out
+ beqz x8, i2s_handler_sd_exit
li x18, (EOS_EVT_AUDIO | I2S_EVT_MIC)
sb x18, MSGQ_ITEM_OFF_CMD(x8)
-i2s_handler_sd_out:
- # pop from spk buf -> x8
- la x9, _eos_i2s_spk_buf
- lhu x18, I2S_ABUF_OFF_IDXR(x9)
- lhu x19, I2S_ABUF_OFF_IDXW(x9)
- beq x18, x19, i2s_handler_sd_exit
- lhu x19, I2S_ABUF_OFF_SIZE(x9)
-
- addi x19, x19, -1
- and x19, x19, x18
- lw x8, I2S_ABUF_OFF_ARRAY(x9)
- add x19, x19, x8
- lbu x8, 0(x19)
-
- addi x18, x18, 1
- sh x18, I2S_ABUF_OFF_IDXR(x9)
-
-#define UART0_CTRL_ADDR 0x10013000
-#define UART_REG_TXFIFO 0x00
- # END
- # li x18, UART0_CTRL_ADDR
- # sw x8, UART_REG_TXFIFO(x18)
-
- # aLaw decode -> x8
- xori x8, x8, 0x55
- andi x9, x8, 0x80
- beqz x9, 0f
- li x9, 1
- slli x9, x9, 7
- not x9, x9
- and x8, x8, x9
- li x9, -1
-0:
- andi x18, x8, 0xf0
- srli x18, x18, 4
- addi x18, x18, 4
-
- li x19, 4
- beq x18, x19, 1f
-
- andi x8, x8, 0x0f
- addi x19, x18, -4
- sll x8, x8, x19
-
- li x19, 1
- sll x19, x19, x18
- or x8, x8, x19
-
- li x19, 1
- addi x18, x18, -5
- sll x19, x19, x18
- or x8, x8, x19
- j 2f
-1:
- slli x8, x8, 1
- ori x8, x8, 1
-2:
- beqz x9, 3f
- mul x8, x8, x9
-3:
-#define UART0_CTRL_ADDR 0x10013000
-#define UART_REG_TXFIFO 0x00
- # END
- li x18, UART0_CTRL_ADDR
- mv x9, x8
- srai x9, x9, 8
- andi x9, x9, 0xff
- sw x9, UART_REG_TXFIFO(x18)
- mv x9, x8
- andi x9, x9, 0xff
- sw x9, UART_REG_TXFIFO(x18)
-
i2s_handler_sd_exit:
# complete
li x18, I2S_IRQ_SD_ID
@@ -305,7 +315,7 @@ i2s_handler_sd_exit:
# exit
j trap_exit_data
-
+
i2s_handler_ws:
# enable sd irq
li x18, PLIC_PRIORITY
@@ -320,6 +330,40 @@ i2s_handler_ws:
# exit
j trap_exit_data
+.global _eos_set_pwm
+_eos_set_pwm:
+ addi sp, sp, -8*REGBYTES
+ STORE x8, 0*REGBYTES(sp)
+ STORE x9, 1*REGBYTES(sp)
+ STORE x18, 2*REGBYTES(sp)
+ STORE x19, 3*REGBYTES(sp)
+ STORE x20, 4*REGBYTES(sp)
+ STORE x21, 5*REGBYTES(sp)
+ STORE x22, 6*REGBYTES(sp)
+ STORE x23, 7*REGBYTES(sp)
+
+ li x18, I2S_PWM_CTRL_ADDR_CK
+ li x19, I2S_PWM_CTRL_ADDR_WS_MIC
+ li x20, I2S_PWM_CTRL_ADDR_WS_SPK
+ li x21, PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | I2S_PWM_SCALE_CK
+ li x22, PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | PWM_CFG_CMP2GANG
+ li x23, PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP
+ sw x21, PWM_CFG(x18)
+ sw x22, PWM_CFG(x19)
+ sw x23, PWM_CFG(x20)
+
+ LOAD x8, 0*REGBYTES(sp)
+ LOAD x9, 1*REGBYTES(sp)
+ LOAD x18, 2*REGBYTES(sp)
+ LOAD x19, 3*REGBYTES(sp)
+ LOAD x20, 4*REGBYTES(sp)
+ LOAD x21, 5*REGBYTES(sp)
+ LOAD x22, 6*REGBYTES(sp)
+ LOAD x23, 7*REGBYTES(sp)
+ addi sp, sp, 8*REGBYTES
+
+ ret
+
.global eos_flash_set
eos_flash_set:
li a3, SPI0_CTRL_ADDR
@@ -329,7 +373,7 @@ eos_flash_set:
li a0, 1
sw a0, SPI_REG_FCTRL(a3)
ret
-
+
#ifdef EOS_WITH_SPI_ASM
# x9 - cmd, x18 - buffer, x19 - len, x20 - &flags, x21 - flags
@@ -343,7 +387,7 @@ spi_xchg_start:
lw x23, 0(x22)
bnez x23, 1f
ori x9, x9, EOS_NET_CMD_FLAG_ONEW
-
+
1:
andi x22, x9, EOS_NET_CMD_FLAG_ONEW
beqz x22, 2f
@@ -381,8 +425,8 @@ spi_xchg_start:
sw x21, SPI_REG_RXCTRL(x20)
li x21, SPI_IP_RXWM
sw x21, SPI_REG_IE(x20)
- jalr x0, x8
-
+ jalr x0, x8
+
spi_handler_xchg:
li x19, SPI1_CTRL_ADDR
la x18, _eos_spi_state_flags
@@ -452,9 +496,9 @@ spi_handler_xchg:
li x8, SPI_CSMODE_AUTO
sw x8, SPI_REG_CSMODE(x19)
sw x0, SPI_REG_IE(x19)
-
+
j spi_handler_xchg_exit
-
+
5:
la x18, _eos_spi_state_len
sw x21, 0(x18)
@@ -469,7 +513,7 @@ spi_handler_xchg:
lw x22, 0(x18)
la x18, _eos_spi_state_buf
lw x23, 0(x18)
-
+
sub x9, x20, x21
li x8, SPI_SIZE_CHUNK
bltu x8, x9, 7f
@@ -478,7 +522,7 @@ spi_handler_xchg:
addi x8, x8, -1
add x9, x23, x21
-8:
+8:
bltz x8, 9f
lw x18, SPI_REG_TXFIFO(x19)
bltz x18, 9f
@@ -488,13 +532,13 @@ spi_handler_xchg:
addi x9, x9, 1
addi x21, x21, 1
j 8b
-
+
9:
sub x8, x21, x22
addi x8, x8, -1
add x9, x23, x22
-
-10:
+
+10:
bltz x8, 11f
lw x18, SPI_REG_RXFIFO(x19)
bltz x18, 11f
@@ -509,7 +553,7 @@ spi_handler_xchg:
sw x21, 0(x18)
la x18, _eos_spi_state_idx_rx
sw x22, 0(x18)
-
+
bne x22, x20, 15f
li x8, SPI_CSMODE_AUTO
sw x8, SPI_REG_CSMODE(x19)
@@ -544,9 +588,9 @@ spi_handler_xchg:
andi x8, x8, ~SPI_FLAG_ONEW
sb x8, 0(x18)
sw x23, 0(x19)
-
+
j spi_handler_xchg_exit
-
+
14:
# push to spi buf queue
la x19, _eos_spi_buf_q
@@ -562,7 +606,7 @@ spi_handler_xchg:
j spi_handler_xchg_exit
-15:
+15:
bne x21, x20, spi_handler_xchg_exit
sub x8, x20, x22
addi x8, x8, -1
@@ -573,7 +617,7 @@ spi_handler_xchg:
sw x8, SPI_REG_RXCTRL(x19)
li x9, SPI_IP_RXWM
sw x9, SPI_REG_IE(x19)
-
+
spi_handler_xchg_exit:
# complete
li x18, INT_SPI1_BASE
@@ -595,7 +639,7 @@ spi_handler_cts:
sb x21, 0(x20)
andi x9, x21, SPI_FLAG_RDY
beqz x9, 2f
-
+
# pop from send q
la x9, _eos_spi_send_q
lbu x18, MSGQ_OFF_IDXR(x9)
@@ -617,13 +661,13 @@ spi_handler_cts:
lhu x19, MSGQ_ITEM_OFF_SIZE(x8)
beqz x18, 1f
jal x8, spi_xchg_start
-
+
j spi_handler_cts_exit
-
+
1:
andi x9, x21, SPI_FLAG_RTS
beqz x9, spi_handler_cts_exit
-
+
# pop from spi buf queue
la x9, _eos_spi_buf_q
lbu x18, SPI_BUFQ_OFF_IDXR(x9)
@@ -691,7 +735,7 @@ spi_handler_rts:
sw x0, SPI_REG_RXCTRL(x19)
li x8, SPI_IP_RXWM
sw x8, SPI_REG_IE(x19)
-
+
j spi_handler_rts_exit
1:
@@ -739,7 +783,7 @@ handler:
.section .text.entry
.align 2
-
+
trap_entry_text:
addi sp, sp, -24*REGBYTES
@@ -784,7 +828,7 @@ handle_ext:
li x18, PLIC_CLAIM
sw a0, 0(x18)
j trap_exit_text
-
+
trap_exit_text:
# Remain in M-mode after mret
li t0, MSTATUS_MPP
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 04:46:18 +0000