Hi everyone,
I'm working on an audio acquisition project using the STM32H743ZIT6 microcontroller. The goal is to build a microphone array with 8 digital MEMS microphones (MP34DT05-A), connected via DFSDM and streamed over USB to a PC using the USB Audio Class (UAC). At the moment, I'm starting small and testing with one or two microphones.
So far, I have successfully configured one DFSDM filter and one channel using regular conversion with DMA, and I'm receiving valid audio data.
Now I would like to add a second microphone, which is connected to a second DFSDM channel (with opposite clock edge). Both channels should ideally be handled by the same DFSDM filter.
I'm currently wondering:
What is the best approach to sample two channels using a single DFSDM filter?
Is it necessary or recommended to use injected conversion for the second channel in this case?
How would I properly configure DMA and interrupts if both regular and injected conversions are used?
Are there any known working examples for this kind of setup?
Any tips, experiences, or suggestions would be greatly appreciated!
Thanks in advance
