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-rw-r--r--code/fe310/eos/eos.c2
-rw-r--r--code/fe310/eos/i2s.c91
-rw-r--r--code/fe310/eos/i2s.h5
-rw-r--r--code/fe310/eos/trap_entry.S4
4 files changed, 41 insertions, 61 deletions
diff --git a/code/fe310/eos/eos.c b/code/fe310/eos/eos.c
index 3ad3b68..c4d0919 100644
--- a/code/fe310/eos/eos.c
+++ b/code/fe310/eos/eos.c
@@ -2,6 +2,7 @@
#include "interrupt.h"
#include "timer.h"
#include "net.h"
+#include "i2s.h"
#include "eos.h"
@@ -10,6 +11,7 @@ void eos_init(void) {
eos_intr_init();
eos_timer_init();
eos_net_init();
+ eos_i2s_init();
}
void eos_start(void) {
diff --git a/code/fe310/eos/i2s.c b/code/fe310/eos/i2s.c
index 0bd818a..6912f34 100644
--- a/code/fe310/eos/i2s.c
+++ b/code/fe310/eos/i2s.c
@@ -23,16 +23,15 @@
EOSABuf _eos_i2s_mic_buf;
EOSABuf _eos_i2s_spk_buf;
uint32_t _eos_i2s_fmt = 0;
-uint32_t _eos_i2s_ck_period = 0;
uint32_t _eos_i2s_mic_volume = 0;
uint32_t _eos_i2s_spk_volume = 0;
-uint32_t _eos_i2s_mic_wm;
-uint32_t _eos_i2s_spk_wm;
-uint32_t _eos_i2s_mic_evt_enable;
-uint32_t _eos_i2s_spk_evt_enable;
+uint32_t _eos_i2s_mic_wm = 0;
+uint32_t _eos_i2s_spk_wm = 0;
+uint32_t _eos_i2s_mic_evt_enable = 0;
+uint32_t _eos_i2s_spk_evt_enable = 0;
-static eos_i2s_fptr_t spk_evt_handler;
-static eos_i2s_fptr_t mic_evt_handler;
+static eos_i2s_fptr_t spk_evt_handler = NULL;
+static eos_i2s_fptr_t mic_evt_handler = NULL;
static void _abuf_init(EOSABuf *buf, uint8_t *array, uint16_t size) {
buf->idx_r = 0;
@@ -109,12 +108,15 @@ static void i2s_handler_evt(unsigned char type, unsigned char *buffer, uint16_t
}
}
-void eos_i2s_init(uint32_t sample_rate) {
- int i;
- unsigned long f = get_cpu_freq();
+extern void _eos_i2s_start_pwm(void);
- _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;
+void eos_i2s_init(void) {
+ eos_evtq_set_handler(EOS_EVT_AUDIO, i2s_handler_evt);
+ eos_evtq_set_flags(EOS_EVT_AUDIO | I2S_ETYPE_MIC, EOS_EVT_FLAG_NET_BUF_ACQ);
+}
+
+void eos_i2s_start(uint32_t sample_rate, unsigned char fmt) {
+ uint32_t ck_period = (get_cpu_freq() / (sample_rate * 64)) & ~I2S_PWM_SCALE_CK_MASK;;
GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK);
GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK);
@@ -145,50 +147,34 @@ void eos_i2s_init(uint32_t sample_rate) {
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;
- I2S_PWM_REG_CK(PWM_CMP0) = _ck_period_scaled;
- I2S_PWM_REG_CK(PWM_CMP1) = _ck_period_scaled / 2;
+ I2S_PWM_REG_CK(PWM_CMP0) = ck_period >> I2S_PWM_SCALE_CK;
+ I2S_PWM_REG_CK(PWM_CMP1) = I2S_PWM_REG_CK(PWM_CMP0) / 2;
I2S_PWM_REG_CK(PWM_CMP2) = 0;
I2S_PWM_REG_CK(PWM_CMP3) = 0;
- 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;
+ I2S_PWM_REG_WS_MIC(PWM_CMP0) = (ck_period + 1) * 64 - 1;
+ I2S_PWM_REG_WS_MIC(PWM_CMP1) = (ck_period + 1) * 32;
+ I2S_PWM_REG_WS_MIC(PWM_CMP2) = (ck_period + 1) * _eos_i2s_mic_volume;
+ I2S_PWM_REG_WS_MIC(PWM_CMP3) = I2S_PWM_REG_WS_MIC(PWM_CMP2) + (ck_period + 1) * 17;
- _eos_i2s_mic_evt_enable = 0;
- _eos_i2s_spk_evt_enable = 0;
- mic_evt_handler = NULL;
- spk_evt_handler = NULL;
+ I2S_PWM_REG_WS_SPK(PWM_CMP0) = (ck_period + 1) * 64 - 1;
+ I2S_PWM_REG_WS_SPK(PWM_CMP1) = (ck_period + 1) * 32;
+ I2S_PWM_REG_WS_SPK(PWM_CMP2) = (ck_period + 1) * 33;
- eos_intr_set(I2S_IRQ_WS_ID, 0, NULL);
- eos_intr_set(I2S_IRQ_SD_ID, 0, NULL);
- eos_evtq_set_handler(EOS_EVT_AUDIO, i2s_handler_evt);
- eos_evtq_set_flags(EOS_EVT_AUDIO | I2S_ETYPE_MIC, EOS_EVT_FLAG_NET_BUF_ACQ);
-}
-
-extern void _eos_set_pwm(void);
+ I2S_PWM_REG_CK(PWM_COUNT) = 0;
+ I2S_PWM_REG_WS_MIC(PWM_COUNT) = (ck_period + 1) * 32;
+ I2S_PWM_REG_WS_SPK(PWM_COUNT) = (ck_period + 1) * 32 + (ck_period + 1) * (_eos_i2s_spk_volume + 1 - _eos_i2s_mic_volume) + (ck_period + 1) / 2;
-void eos_i2s_start(void) {
+ _eos_i2s_fmt = fmt;
_eos_i2s_mic_evt_enable = 1;
_eos_i2s_spk_evt_enable = 1;
eos_intr_set_priority(I2S_IRQ_WS_ID, I2S_IRQ_WS_PRIORITY);
+ eos_intr_set_priority(I2S_IRQ_SD_ID, 0);
+ eos_intr_enable(I2S_IRQ_WS_ID);
+ eos_intr_enable(I2S_IRQ_SD_ID);
- 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;
-
- _eos_set_pwm();
+ _eos_i2s_start_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;
@@ -218,11 +204,12 @@ void eos_i2s_stop(void) {
I2S_PWM_REG_WS_MIC(PWM_COUNT) = 0;
I2S_PWM_REG_WS_SPK(PWM_COUNT) = 0;
+ _eos_i2s_mic_evt_enable = 0;
+ _eos_i2s_spk_evt_enable = 0;
eos_intr_set_priority(I2S_IRQ_WS_ID, 0);
eos_intr_set_priority(I2S_IRQ_SD_ID, 0);
- eos_intr_mask(0);
- eos_i2s_mic_init(NULL, 0);
- eos_i2s_spk_init(NULL, 0);
+ eos_intr_disable(I2S_IRQ_WS_ID);
+ eos_intr_disable(I2S_IRQ_SD_ID);
GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_CK);
GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_CK);
@@ -240,14 +227,6 @@ void eos_i2s_stop(void) {
GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SW);
}
-void eos_i2s_set_fmt(unsigned char fmt) {
- clear_csr(mstatus, MSTATUS_MIE);
- _eos_i2s_fmt = fmt;
- _abuf_flush(&_eos_i2s_mic_buf);
- _abuf_flush(&_eos_i2s_spk_buf);
- set_csr(mstatus, MSTATUS_MIE);
-}
-
void eos_i2s_mic_init(uint8_t *mic_arr, uint16_t mic_arr_size) {
clear_csr(mstatus, MSTATUS_MIE);
_abuf_init(&_eos_i2s_mic_buf, mic_arr, mic_arr_size);
diff --git a/code/fe310/eos/i2s.h b/code/fe310/eos/i2s.h
index 09b9228..8ae7d98 100644
--- a/code/fe310/eos/i2s.h
+++ b/code/fe310/eos/i2s.h
@@ -12,10 +12,9 @@ typedef struct EOSABuf {
typedef void (*eos_i2s_fptr_t) (unsigned char);
-void eos_i2s_init(uint32_t sample_rate);
-void eos_i2s_start(void);
+void eos_i2s_init(void);
+void eos_i2s_start(uint32_t sample_rate, unsigned char fmt);
void eos_i2s_stop(void);
-void eos_i2s_set_fmt(unsigned char fmt);
void eos_i2s_mic_init(uint8_t *mic_arr, uint16_t mic_arr_size);
void eos_i2s_mic_set_handler(eos_i2s_fptr_t wm_handler);
void eos_i2s_mic_set_wm(uint16_t wm);
diff --git a/code/fe310/eos/trap_entry.S b/code/fe310/eos/trap_entry.S
index c3b7104..7b32050 100644
--- a/code/fe310/eos/trap_entry.S
+++ b/code/fe310/eos/trap_entry.S
@@ -370,8 +370,8 @@ i2s_handler_ws:
# exit
j trap_exit_data
-.global _eos_set_pwm
-_eos_set_pwm:
+.global _eos_i2s_start_pwm
+_eos_i2s_start_pwm:
addi sp, sp, -8*REGBYTES
STORE x8, 0*REGBYTES(sp)
STORE x9, 1*REGBYTES(sp)
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-26 14:40:16 +0000