Hi, guys
I am debugging the I2S feature on nRF340DK, when I completed the initialization of I2S pins configuration and start I2S, the SCK,LRCK and MCLK pins can produced the waveforms.
But there is no signals on sdout_pin.
The EVENT_TXPTRUPD and EVENTS_FRAMESTART event can be received normally.
And I also check this Devzone thread, but it still can't work.
(https://devzone.nordicsemi.com/f/nordic-q-a/75638/nrf5340-about-i2s-debugging)
Could anyone help me to fix it?
Thanks a lot!
#define I2S_DATA_BLOCK_SIZE 512
static nrfx_i2s_buffers_t initial_buffers;
static uint8_t m_buffer_rx[2][I2S_DATA_BLOCK_SIZE];
static uint8_t m_buffer_tx[2][I2S_DATA_BLOCK_SIZE];
void iis_user_irq_handler(void)
{
uint8_t temp = 0;
if (nrf_i2s_event_check(NRF_I2S0, NRF_I2S_EVENT_TXPTRUPD))
{
nrf_i2s_event_clear(NRF_I2S0, NRF_I2S_EVENT_TXPTRUPD);
temp = 1;
}
if (nrf_i2s_event_check(NRF_I2S0, NRF_I2S_EVENT_RXPTRUPD))
{
nrf_i2s_event_clear(NRF_I2S0, NRF_I2S_EVENT_RXPTRUPD);
temp = 2;
}
if (nrf_i2s_event_check(NRF_I2S0, NRF_I2S_EVENT_STOPPED))
{
nrf_i2s_event_clear(NRF_I2S0, NRF_I2S_EVENT_STOPPED);
temp = 3;
}
if (nrf_i2s_event_check(NRF_I2S0, NRF_I2S_EVENT_FRAMESTART))
{
nrf_i2s_event_clear(NRF_I2S0, NRF_I2S_EVENT_FRAMESTART);
temp = 4;
}
}
static nrfx_err_t i2s_init()
{
nrfx_i2s_config_t config;
config.sck_pin = NRF_GPIO_PIN_MAP(0,6); //sclk
config.lrck_pin = NRF_GPIO_PIN_MAP(0,7); //lrck
config.mck_pin = NRF_GPIO_PIN_MAP(1,4); //mclk
config.sdout_pin = NRF_GPIO_PIN_MAP(1,8); //txsda
config.sdin_pin = NRF_GPIO_PIN_MAP(1,6); //rxsda
config.irq_priority = 100;
config.mode = NRF_I2S_MODE_MASTER;
config.format = NRF_I2S_FORMAT_I2S;
config.alignment = NRF_I2S_ALIGN_LEFT;
config.sample_width = NRF_I2S_SWIDTH_16BIT;
config.channels = NRF_I2S_CHANNELS_STEREO;
config.mck_setup = 0x66666000;
config.ratio = NRF_I2S_RATIO_128X;
config.clksrc = NRF_I2S_CLKSRC_ACLK;
config.enable_bypass = false;
nrfx_err_t err_code = nrfx_i2s_init(&config, data_handler);
if (err_code != NRFX_SUCCESS)
{
printk("I2S init error\n");
return err_code;
}
IRQ_DIRECT_CONNECT(I2S0_IRQn, 0, iis_user_irq_handler, 0);
return err_code;
}
void main(void)
{
nrfx_err_t err1;
err1 = i2s_init();
if (err1 != NRFX_SUCCESS)
{
return;
}
memset(m_buffer_tx[0], 0x00, I2S_DATA_BLOCK_SIZE);
memcpy(m_buffer_tx[0], WaveData+AUIDO_START_ADDRESS, I2S_DATA_BLOCK_SIZE);
initial_buffers.p_tx_buffer = m_buffer_tx[0];
initial_buffers.p_rx_buffer = NULL;
nrfx_err_t err_code = nrfx_i2s_start(&initial_buffers, I2S_DATA_BLOCK_SIZE, 0); //start send
if (err_code != NRFX_SUCCESS) {
printk("Error: %x\n", err_code);
}
while (1)
{
k_sleep(K_MSEC(PAUSE_TIME));
}
}
