How to set SAI to receive audio data on the microphone on STM32F746G-disco

uveuvenouve · ‎2024-03-21

Hi everybody,

I am trying to use the audio on stm32f746g-disco.
I can hardly find a tutorial for this.
Many solutions got their way to solve it and left not much details.

lots of the solutions guide to the examples in CubeMX , but they seems a little bit old and I can't figure out what is the examples are doing

For now I tried to init SAI2B to receive data

but it not like getting any valid data or triggering half and complete callback
i've attached my main.c ,and the setting of SAI B and its dma
take a look if you have time

thank you

SofLit · ‎2024-03-21

Hello,

You can use the BSP audio driver of the embedded microphones from here.

Related files: stm32746g_discovery_audio.c and stm32746g_discovery_audio.h

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uveuvenouve · ‎2024-03-21

Hi SofLit,

I can see it. I just realize it is set to use the microphones for the audio loop back example.

but when I plug in my earphone , it just have constant electric sound.

What do you think the problem is ?

SofLit · ‎2024-03-21

Not sure what the problem is.
Start using the audio player example under this path:

Projects/STM32746G-Discovery/Applications/Audio/Audio_playback_and_record

If it does’t work, indeed there is an issue, if not inspire from the example.

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