How to write mic captured data into a wav file on STM32F412G Discovery Board
Hi,
I am working on STM32F412G Discovery Board to capture audio data from Digital MEMS. For that, I've found an example in the below path
STM32Cube_FW_F4_V1.24.0\Projects\STM32F412GDiscovery\Examples\DFSDM\DFSDM_AudioRecord\.
But I want to write the mic captured data into a file in order to analyze the data characteristics. I tried to insert FILE operations in the above example but getting some HardFault_Handler interrupt. Can somebody help me to sort out this problem.
In below lines, you can found the implementation
while(1)
{
if((DmaLeftRecHalfBuffCplt == 1) && (DmaRightRecHalfBuffCplt == 1))
{
/* Store values on Play buff */
for(i = 0; i < 1024; i++)
{
PlayBuff[2*i] = 0;
PlayBuff[(2*i)+1] = SaturaLH((RightRecBuff[i] >> 8), -32768, 32767);
}
f_write(&Wav_File, file_buffer, 2048*2, (void*)&byteswritten);
if(PlaybackStarted == 0)
{
if(0 != audio_drv->Play(AUDIO_I2C_ADDRESS, (uint16_t *) &PlayBuff[0], 4096))
{
Error_Handler();
}
if(HAL_OK != HAL_I2S_Transmit_DMA(&haudio_i2s, (uint16_t *) &PlayBuff[0], 4096))
{
Error_Handler();
}
PlaybackStarted = 1;
}
DmaLeftRecHalfBuffCplt = 0;
DmaRightRecHalfBuffCplt = 0;
}
if((DmaLeftRecBuffCplt == 1) && (DmaRightRecBuffCplt == 1))
{
/* Store values on Play buff */
for(i = 1024; i < 2048; i++)
{
PlayBuff[2*i] = 0;
PlayBuff[(2*i)+1] = SaturaLH((RightRecBuff[i] >> 8), -32768, 32767);
}
DmaLeftRecBuffCplt = 0;
DmaRightRecBuffCplt = 0;
}
}
trying to write data in the file in the same loop where it is copying to playbuff.
Thanks in advance.
regards,
Jayakanth