STM32N6570-DK USB UVC Not Detected – Possible USBPD/UCPD Dependency?

[saikumar]

Hello,

I'm working on implementing USB UVC on the STM32N6570-DK board. I generated a project using STM32CubeMX only for FSBL and added the following files manually from the ST USBX example project

1 . ux_device_video.c and .h
2 . ux_device_descriptors .c and .h
3 . app_usbx_device .c and .h
4 . app_azure_rtos.c and .h

All files were taken from this example:

https://github.com/STMicroelectronics/STM32CubeN6/tree/main/Projects/STM32N6570-DK/Applications/USBX/Ux_Device_Video/Appli 

However, I did not use USBPD/UCPD in my CubeMX configuration. The ST example uses both USBPD and UCPD and also includes a separate FSBL and Application.

Issue:

When I flash the my project to the STM32N6570-DK board, the USB device is not enumerating as a UVC device it does not appear in the Windows Device Manager at all.

I previously tested a similar setup on an STM32U5 device, and it worked — the UVC device was properly enumerated.

Questions:

1. Is UCPD/USBPD required for USB UVC to work on the STM32N6570-DK board?

2. Could this be the reason the USB is not being detected?

3. Could ST provide a   .ioc   file for the UX_Device_Video example project  for reference?

Any help or clarification would be greatly appreciated!

Thank you

[FBL]

Dear @saikumar 

First, did you follow the README file and flash the provided example? Does it work as-is, or not? Without regenerating the code using CubeMX?

[saikumar]

Hello ,  mr @FBL 

Yes, I followed the README instructions and flashed the provided example without regenerating any code. It worked correctly__the UVC device was properly enumerated and appear in  Windows Device Manager, and I was able to preview the video output using the Windows Camera app.

However, when I tried to generate the project using STM32CubeMX (for FSBL only) it is not working. please check the source code and .ioc provided above .

Thank you,

[FBL]

Hi @saikumar

Currently, latest CubeMX v6.14.1 does not support USB code generation for STM32N6 in USB applications. You should refer to example provided in CubeN6 as reference.