STM32F4xx Audio Player without CS43L22 codec

[alex0]

Hello!

I have a board with STM32F4xx and wanted to play stereo audio, starting with wav, for its simplicity.

I have seen many examples, but all are based on STM32F4-DISCOVERY board using CS43L22 codec.

I would like to use the two internal 12-bit DACs STM32F4xx.

For example play a wav file 22050 Hz stereo 8bit.
 
I am using the following drivers: https://github.com/mobyfab/ChibiOS/tree/dac-new

Has anyone worked with playing audio stereo STM32F4xx internal DACs?

Thank you!

[mobyfab]

Hey,

I will try to make a demo.
This should be possible using the DMA transfer callbacks.

I'll post a link when this is done.

[alex0]

Great!

I will try to do the same with the new drivers you gave me: https://github.com/mobyfab/ChibiOS/tree/dac-3.0

Thank you!

[mobyfab]

This should get you started:
https://github.com/mobyfab/ChibiOS-Exam ... DAC/main.c

[alex0]

Hello!

Does anyone know how to read a file. Wav and send the data to the DAC?

I tried opening the file with f_open () and offering the units beginning to read from the file data sector.
   / *
   * Jump to industry data
   * /
   res = f_lseek (& file, 500);

Could it be done using F_READ () and sending the data to the DAC with dacStartConversion (& DACD1, & dacconvgrp, fbuff, BUFF_SIZE) function?

I'm using the repository dac-new.

Thank you!

[TexZK]

That is ok only for PCM formats. I think using a WAV File I/O library would be much better in case you're reading that from an SD card, and you might get more performant codecs for free.