Enable DMA on DWC2 for video streaming

[Lurcy38]

Dear all,

I enabled video encoding H264 on an STM32N6 and the stream out uses TinyUSB with the video class in frame-based mode.
The result is perfect; I can play the streaming using ffplay on a Windows PC.

However, I would like to improve USB throughput performance by enabling the DWC2 DMA and reaching 30 fps. I set the flag CFG_TUD_DWC2_DMA_ENABLE and hoped it would be enough to get better performance, but it is not. The USB no longer works using this flag.

What are the conditions to take advantage of the DMA for DWC2? Any advice?

Thanks,
William

[Lurcy38]

sorry i didn't see the thread #2956, let's check it first :)