How to play audio clips over I2S ?(DA7212 codec)

Hi Team,

I want to play audio clips over I2S like short audio clips - Connected to device , Disconnected etc, so. I converted.wav file to C- code(Im using WAVtoC software to convert C-code)and stored in flash memory. Below I attached the .wav to c code file.

I'm usingDA7212 Codecto play these audio clips over I2S.

These Audio clips has 8k sampling rate, 16bit bits per sample. Total number of samples around 3500.

I tried with interrupt method to transmit data of 512bytes each, pls check below code

1. Number of elements are defined 3500 samples
2. Unsigned short PowerOndata[NUM_ELEMENTS] = {--------- }; contains the 3500 samples values ,
3. uint16_t *firstarray=STEREO_AUD_DATA; // data is stored Stereo format
4. unsigned short STEREO_AUD_DATA[2*NUM_ELEMENTS];

void ConncetAUD(){

int i=0;

// store data in stereo format

for(int i=0;i

STEREO_AUD_DATA[(i*2)] = PowerOndata[i]; //left

STEREO_AUD_DATA((我* 2)+ 1)= PowerOndata [i]; //right

}

firstarray=STEREO_AUD_DATA;

while(i < 15){

if(HAL_I2S_GetState(&CODEC_I2S) == HAL_I2S_STATE_READY){

HAL_I2SEx_TransmitReceive_IT(&CODEC_I2S,firstarray,rxBuffer, 512); // will get callback event here-HAL_I2SEx_TxRxCpltCallback

Display(("voice prompt :%d\n",*firstarray));

i++;

osDelay(200);

}

}

}

3. update data in call back function.

void HAL_I2SEx_TxRxCpltCallback(I2S_HandleTypeDef *hi2s){

firstarray += 512;

}

I'm sure that I configured codec registers properly, I can able to play music and all, which is connected to BT. I'm using stm32f4 series microcontroller, the DA7212 is connected to this controller.