for esp32-s3-eye I2S (AIV-637)

[hzhh110]

for esp32-s3-eye board
static void i2s_init(void)
{
i2s_config_t i2s_config = {
.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX), // the mode must be set according to DSP configuration
.sample_rate = 16000, // must be the same as DSP configuration
.bits_per_sample = (i2s_bits_per_sample_t)32, // must be the same as DSP configuration
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT, // must be the same as DSP configuration
.communication_format = I2S_COMM_FORMAT_STAND_I2S,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL2,
.dma_buf_count = 3,
.dma_buf_len = 300,
};
i2s_pin_config_t pin_config = {
.mck_io_num = I2S_PIN_NO_CHANGE,
.bck_io_num = 41, // IIS_SCLK
.ws_io_num = 42, // IIS_LCLK
.data_out_num = I2S_PIN_NO_CHANGE, // IIS_DSIN
.data_in_num = 2 // IIS_DOUT
};
i2s_driver_install(I2S_CH, &i2s_config, 0, NULL);
i2s_set_pin(I2S_CH, &pin_config);
i2s_zero_dma_buffer(I2S_CH);
}

size_t samp_len = audio_chunksize * I2S_CHANNEL_NUM;
size_t samp_len_bytes = samp_len * sizeof(int32_t);
int32_t *i2s_buff = (int32_t *)malloc(samp_len_bytes);
assert(i2s_buff);
size_t bytes_read;

while (true)
{
    i2s_read(I2S_CH, i2s_buff, samp_len_bytes, &bytes_read, portMAX_DELAY);

}

Why is the audio data I'm getting all noisy?

[hzhh110]

How do I set up to get the full PCM data?

[feizi]

Hi @hzhh110 , you can refer to esp-bsp/esp32-s3-eye about how to set your I2S.