52832 master, through the I2S interface to transmit voice data to the DAC player

Question

Hi,

Currently I have a problem with the use of 52832 I2S interface to transmit voice, the transmission is not coherent.

Here is my initialization code

	// Enable reception
NRF_I2S->CONFIG.RXEN = (I2S_CONFIG_RXEN_RXEN_Enabled << I2S_CONFIG_RXEN_RXEN_Pos);
// Enable transmission
NRF_I2S->CONFIG.TXEN = (I2S_CONFIG_TXEN_TXEN_Enabled << I2S_CONFIG_TXEN_TXEN_Pos);
// Enable MCK generator
NRF_I2S->CONFIG.MCKEN = (I2S_CONFIG_MCKEN_MCKEN_Enabled << I2S_CONFIG_MCKEN_MCKEN_Pos);
// MCKFREQ = 16 kHz
NRF_I2S->CONFIG.MCKFREQ = I2S_CONFIG_MCKFREQ_MCKFREQ_32MDIV21 << I2S_CONFIG_MCKFREQ_MCKFREQ_Pos;
// Ratio = 96
NRF_I2S->CONFIG.RATIO = I2S_CONFIG_RATIO_RATIO_96X << I2S_CONFIG_RATIO_RATIO_Pos;
// MCKFREQ = 4 MHz and Ratio = 256 gives sample rate = 15.625 ks/s
// Sample width = 16 bit
NRF_I2S->CONFIG.SWIDTH = I2S_CONFIG_SWIDTH_SWIDTH_16Bit << I2S_CONFIG_SWIDTH_SWIDTH_Pos;
// Alignment = Left
NRF_I2S->CONFIG.ALIGN = I2S_CONFIG_ALIGN_ALIGN_Left << I2S_CONFIG_ALIGN_ALIGN_Pos;
// Format = I2S
NRF_I2S->CONFIG.FORMAT = I2S_CONFIG_FORMAT_FORMAT_I2S << I2S_CONFIG_FORMAT_FORMAT_Pos;
// Use Left
NRF_I2S->CONFIG.CHANNELS = I2S_CONFIG_CHANNELS_CHANNELS_Left << I2S_CONFIG_CHANNELS_CHANNELS_Pos;

// MCK routed to pin 20
NRF_I2S->PSEL.MCK = (20 << I2S_PSEL_MCK_PIN_Pos) | (I2S_PSEL_MCK_CONNECT_Connected << I2S_PSEL_MCK_CONNECT_Pos);
// SCK routed to pin 22
NRF_I2S->PSEL.SCK = (22 << I2S_PSEL_SCK_PIN_Pos) | (I2S_PSEL_SCK_CONNECT_Connected << I2S_PSEL_SCK_CONNECT_Pos);
// LRCK routed to pin 23
NRF_I2S->PSEL.LRCK = (23 << I2S_PSEL_LRCK_PIN_Pos) | (I2S_PSEL_LRCK_CONNECT_Connected <<I2S_PSEL_LRCK_CONNECT_Pos);
// SDOUT routed to pin 24
NRF_I2S->PSEL.SDOUT = (24 << I2S_PSEL_SDOUT_PIN_Pos) | (I2S_PSEL_SDOUT_CONNECT_Connected << I2S_PSEL_SDOUT_CONNECT_Pos);
// SDIN routed on pin 25
NRF_I2S->PSEL.SDIN = (25 << I2S_PSEL_SDIN_PIN_Pos) | (I2S_PSEL_SDIN_CONNECT_Connected << I2S_PSEL_SDIN_CONNECT_Pos);

NRF_I2S->TXD.PTR = *my_tx_buf;
NRF_I2S->RXD.PTR = *my_rx_buf;
NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE;

NRF_I2S->ENABLE = 1;

NRF_I2S->TASKS_START = 1;

Use of the data book routines.

Here is my data transfer code.

		NRF_I2S->TXD.PTR = *BufferTx;
	NRF_I2S->EVENTS_TXPTRUPD = 0;

The data captured by the logic analyzer is used to indicate that the data is not coherent. image description

image description

I would like to ask whether the I2S interface configuration is correct or a reference routines, thank you!