Understand a code provided in the example STM32L552E-EV

[DYann.1]

Hello,

I would like some advice on understanding a code with an example provided with the STM32L5xx evaluation board. I have this code below :

 /* Initialize the data buffer */
 for(int i=0; i < PLAY_BUFF_SIZE; i+=2)
 {
 PlayBuff[i]=*((__IO uint16_t *)(AUDIO_FILE_ADDRESS + PLAY_HEADER + i));
 }

PLAY_BUFF_SIZE = 4096
uint16_t PlayBuff [PLAY_BUFF_SIZE];

#define AUDIO_FILE_ADDRESS 0x08040000
#define PLAY_HEADER 0x2C

I understand a little bit but where does the value 0x2C come from, what does it come from ? What does PLAY_HEADER mean ?

Thank you for your helps.

[TDK]

The WAV file has a 44-byte header. This skips past the header and reads the data.

[DYann.1]

---

@TDK wrote:

The WAV file has a 44-byte header. This skips past the header and reads the data.

---

 Where did you find this information ? Indeed, at the beginning it says that you have to load the music into a memory area.

[Andrew Neil]

WAV is a well-known, standard file format - it is well documented; eg,

https://en.wikipedia.org/wiki/WAV#WAV_file_header