diff options
Diffstat (limited to 'code/fe310/eos/i2s.c')
| -rw-r--r-- | code/fe310/eos/i2s.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/code/fe310/eos/i2s.c b/code/fe310/eos/i2s.c index 4702bc3..8c3aebb 100644 --- a/code/fe310/eos/i2s.c +++ b/code/fe310/eos/i2s.c @@ -26,8 +26,8 @@ EOSABuf _eos_i2s_mic_buf; EOSABuf _eos_i2s_spk_buf; uint32_t _eos_i2s_fmt = 0; -uint32_t _eos_i2s_mic_volume = 0; -uint32_t _eos_i2s_spk_volume = 0; +uint32_t _eos_i2s_mic_volume = 4; /* 1 - 8 */ +uint32_t _eos_i2s_spk_volume = 12; /* 1 - 16 */ uint32_t _eos_i2s_mic_wm = 0; uint32_t _eos_i2s_spk_wm = 0; uint32_t _eos_i2s_mic_evt_enable = 0; @@ -158,8 +158,6 @@ void eos_i2s_init(void) { void eos_i2s_start(uint32_t sample_rate, unsigned char fmt) { uint32_t ck_period = (PRCI_get_cpu_freq() / (sample_rate * 64)) & ~I2S_PWM_SCALE_CK_MASK;; - GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD_IN); - 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; @@ -168,7 +166,7 @@ void eos_i2s_start(uint32_t sample_rate, unsigned char fmt) { 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; + I2S_PWM_REG_WS_MIC(PWM_CMP3) = I2S_PWM_REG_WS_MIC(PWM_CMP2) + (ck_period + 1) * 16; I2S_PWM_REG_WS_SPK(PWM_CMP0) = (ck_period + 1) * 64 - 1; I2S_PWM_REG_WS_SPK(PWM_CMP1) = (ck_period + 1) * 32; @@ -176,7 +174,7 @@ void eos_i2s_start(uint32_t sample_rate, unsigned char fmt) { 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; + I2S_PWM_REG_WS_SPK(PWM_COUNT) = (ck_period + 1) * 32 + (ck_period + 1)/2 + (ck_period + 1) * (17 - _eos_i2s_spk_volume - _eos_i2s_mic_volume); _eos_i2s_fmt = fmt; _eos_i2s_mic_evt_enable = 1; @@ -194,6 +192,7 @@ void eos_i2s_start(uint32_t sample_rate, unsigned char fmt) { I2S_PWM_REG_WS_SPK(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP; */ + GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD_IN); GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SR); GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_CK); |