diff options
Diffstat (limited to 'code/fe310/eos/i2s.c')
| -rw-r--r-- | code/fe310/eos/i2s.c | 77 |
1 files changed, 45 insertions, 32 deletions
diff --git a/code/fe310/eos/i2s.c b/code/fe310/eos/i2s.c index 8c7096e..4c36d55 100644 --- a/code/fe310/eos/i2s.c +++ b/code/fe310/eos/i2s.c @@ -115,44 +115,55 @@ extern void _eos_i2s_start_pwm(void); 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 = (PRCI_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); + GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_CK); GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CK); GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK_SW); GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK_SW); + GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_CK_SW); GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CK_SW); - 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_WS_MIC); GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS_MIC); + GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_WS_MIC); GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS_MIC); GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_WS_SPK); GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_WS_SPK); GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS_SPK); - GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD_IN); + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK_SR); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK_SR); + GPIO_REG(GPIO_PULLUP_EN) &= ~(1 << I2S_PIN_CK_SR); + GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_CK_SR); + + 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_OUTPUT_XOR) &= ~(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_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; + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SW); + GPIO_REG(GPIO_OUTPUT_VAL) &= ~((1 << I2S_PIN_CK) | (1 << I2S_PIN_CK_SR) | (1 << I2S_PIN_WS_MIC) | (1 << I2S_PIN_WS_SPK)); +} + +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; + I2S_PWM_REG_CK(PWM_CMP3) = 0; I2S_PWM_REG_WS_MIC(PWM_CMP0) = (ck_period + 1) * 64 - 1; I2S_PWM_REG_WS_MIC(PWM_CMP1) = (ck_period + 1) * 32; @@ -183,19 +194,19 @@ 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_IOF_SEL) |= (1 << I2S_PIN_CK); - GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CK); + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SR); - 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_CK); + GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CK); - 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_CK_SW); + GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_CK_SW); - GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_WS_SPK); - GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_WS_MIC); + GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_WS_MIC); - GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SR); + GPIO_REG(GPIO_IOF_SEL) |= (1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_IOF_EN) |= (1 << I2S_PIN_WS_SPK); } void eos_i2s_stop(void) { @@ -213,20 +224,22 @@ void eos_i2s_stop(void) { 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); + 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_SW); + 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_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_IOF_EN) &= ~(1 << I2S_PIN_WS_MIC); - GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_WS_MIC); + GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_WS_SPK); - GPIO_REG(GPIO_IOF_EN) &= ~(1 << I2S_PIN_WS_SPK); - GPIO_REG(GPIO_IOF_SEL) &= ~(1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_SD_IN); - 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); + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SW); + GPIO_REG(GPIO_OUTPUT_VAL) &= ~((1 << I2S_PIN_CK) | (1 << I2S_PIN_CK_SR) | (1 << I2S_PIN_WS_MIC) | (1 << I2S_PIN_WS_SPK)); } void eos_i2s_mic_init(uint8_t *mic_arr, uint16_t mic_arr_size) { |