USB composite CDC+UVC stops receiving data on EP

[Artur5]

Hi

I created a composite USB device with CDC and UVC classes using usbd. The device is detected, camera image streaming works, and data transfer via CDC (virtual serial port) also works. However, after a random time, communication on the CDC data out endpoint stops. Reopening this endpoint solves the problem. The same thing happens with EP0. When I repeatedly open and close the serial port, EP0 stops receiving data after some time. If I stop video streaming, CDC communication is stable.Sometimes I also get an incorrect video frame when data is transmitted via CDC. I'm using FreeRTOS, but running everything in a single thread didn't solve the problem. I have no further ideas what could be wrong.Any ideas?

Artur

[FBL]

Hi @Artur5 

Would you share minimum firmware to reproduce the issue?

[Artur5 · Accepted solution]

Hi.

Thanks for your interest. I found the problem. Incorrect FIFO configuration.

BR

Artur