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

[???]

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.

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

[???]

Hi Jørn,

But the problem has not been resolved, I hope you can continue to help.

Here is the code I modified according to your opinion:

#define MY_BUF_SIZE		64

static uint32_t my_tx_buf[MY_BUF_SIZE];

static uint32_t my_rx_buf[MY_BUF_SIZE];

Initialization:

	// 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 = (uint32_t)my_tx_buf;
NRF_I2S->RXD.PTR = (uint32_t)my_rx_buf;
NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE;

NRF_I2S->ENABLE = 1;

NRF_I2S->TASKS_START = 1;

Data transmission:

void QcyI2sDataSend(uint32_t *BufferTx,uint16_t BufferTxLen)

{

if(NRF_I2S->EVENTS_TXPTRUPD != 0)

{

// NRF_I2S->ENABLE = 1;

// NRF_I2S->TASKS_START = 1;

	NRF_I2S->TXD.PTR = (uint32_t)BufferTx;

	NRF_I2S->EVENTS_TXPTRUPD = 0;

}

}

Here are the results of the test.

I don't know what's going to happen, but it affects woxit.

Look forward to your answer, thank you!

[Jørn]

I'm sorry but I need some additional information before I can help you further. Could you please provide a more detailed description of what the incoherence you are seeing is? And could you please provide an english translation of the text in the pictures?

[???]

Hi Jørn,

Thank you for your reply, the translation of the text on the picture will be uploaded in the subsequent comments, please help continue to answer, thank you!

[Jørn]

Hello

I apologize for the late response.

I'm trying to piece together what you are doing here. I see in your first image you are focusing on the 6-CLOCK line, and mark it with "a data processing".
What exactly is the line named 6 – CLOCK in your plots? Which clock is it?

The data you are sending over I2S, are they defined in your firmware, or are they transmitted to your nRF?

I think it would be helpful to see the full contents of the data you are sending in your test.

[???]

Hi Jørn,

Thank you very much for your reply and the current problem has been settled. Thank you!