Hello,
I'm using nrf52840 DK to test 1khz tone. The nRF Connect SDK version is v2.6.0.
I put a pcm raw data array of 1khz tone in the code and used i2s write to send the data to i2s out.
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const struct device *const i2s_dev_tx = DEVICE_DT_GET(I2S_TX_NODE);
const struct device *const i2s_dev_rx = DEVICE_DT_GET(I2S_TX_NODE);
struct i2s_config config;
#define SAMPLE_FREQUENCY 48000
#define SAMPLE_BIT_WIDTH 16
#define BYTES_PER_SAMPLE sizeof(int16_t)
#define NUMBER_OF_CHANNELS 2
/* Such block length provides an echo with the delay of 100 ms. */
#define SAMPLES_PER_BLOCK ((SAMPLE_FREQUENCY / 10) * NUMBER_OF_CHANNELS)
#define INITIAL_BLOCKS 2
#define TIMEOUT 1000
#define BLOCK_SIZE (BYTES_PER_SAMPLE * SAMPLES_PER_BLOCK)
#define BLOCK_COUNT (INITIAL_BLOCKS + 2)
K_MEM_SLAB_DEFINE_STATIC(mem_slab, BLOCK_SIZE, BLOCK_COUNT, 4);
static int16_t data_buf_tmp[9600];
static bool configure_streams(const struct device *i2s_dev_tx,const struct i2s_config *config);
static void i2s_init(void){
int ret;
My pcm raw data array is an int16 stereo array, arranged as:
[left_data0,right_data0,left_data1,right_data1,....]
After testing, it is found that the output sound is distorted. Is there anything that needs to be adjusted?
