WAV file to c array (audio_sample.c)

Can you be a little more specific about what STM32 you are using, and the package you are talking about? Provide a cite

Thanks Clive for the respond! , you save me a lot of times before... I'm using STM32F407ZG and STM32F4DISCOVERY.

memset(&fs32, 0, 
sizeof
(FATFS));
res = f_mount(0, &fs32); printf(
''Value of f_mount %d

''
,res);
res = f_open(&fil, File, FA_READ); printf(
''Value of f_open %d

''
,res); 
f_read (&fil, buffer1_temp, _MAX_SS, &BytesRead);
/* Get Data from SD Key */
if
(res == FR_OK){
while
(WaveDataLength != 0){
XferCplt = 0;
if
(buffer_switch == 0){
/* Play data from buffer1 */
Audio_MAL_Play((
int
)buffer1_temp, _MAX_SS);
/* Store data in buffer2 */
f_read (&fil, buffer2_temp, _MAX_SS, &BytesRead); 
buffer_switch = 1;
}
else
{ 
/* Play data from buffer2 */
Audio_MAL_Play((uint32_t)buffer2_temp, _MAX_SS2);
/* Store data in buffer1 */
f_read (&fil, buffer1_temp, _MAX_SS, &BytesRead);
buffer_switch = 0;
} 
while
(XferCplt == 0) {}
}
}
res = f_close(&fil);

The ''C'' arrays can be generated on a PC using fopen/fseek/ftell/fread/fclose, a tool to do this from scratch might take 5-10 mins.

512 byte buffers probably aren't going to cut it here, the command/processing overhead is rather high. I'd suggest 8K or 32K aligned blocks.

> Remember .WAV files contain a header, you can process this to determine the data format internally.

http://soundfile.sapp.org/doc/WaveFormat/

I assume you are looking at 16bit wav files. As FATFS works on bytes you'll need to convert 2 bytes into a value to send to the DAC. I use:
data = (signed)((byteb << 8) | bytea);
I read a chunk of the file through FATFS and loaded that into 2 buffers and then had an interrupt running at 48khz to send the data to the DAC at a regular rate. When the buffer runs out I switch to the second buffer and refill the first using f_read(&file, buffer[currentBuffer], bufferSize, &Pos);
The data must be sent to the DAC at a regular rate to ensure good sound quality and to prevent it from thinking you're done sending data or doing strange things.

http://www.chibios.com/forum/viewtopic.php?f=4&t=351

Wav files are very simple, pure audiodata. There is a header but it is very short, two bytes or so. So they probably are already something you call C-arrays.

Thank you for your time.

>Wav files are very simple, pure audiodata.

http://www.audacityteam.org/