Example for Azure RTOS USBX device video (UVC)

[Johannes]

Hello everyone

Does anyone have example code for Azure RTOS USBX device class video (UVC)?

I was able to add Video to my USBX demo application on Nucleo H7A3

There was sample code for CDC_ACM and MSC (mass storage), this worked fine. But for device class video, I was not able to find any example code.

CubeIDE 1.12.1 generated two files

ux_device_video.c

ux_device_video.h

But both files only contain prototypes of callback functions which need to be filled

Like this:

/**
 * @brief USBD_VIDEO_StreamRequest
 * This function is invoked to manage the UVC class requests.
 * @param video_stream: Pointer to video class stream instance.
 * @param transfer: Pointer to the transfer request.
 * @retval status
 */
UINT USBD_VIDEO_StreamRequest(UX_DEVICE_CLASS_VIDEO_STREAM *video_stream,
 UX_SLAVE_TRANSFER *transfer)
{
 UINT status = UX_SUCCESS;
 
 /* USER CODE BEGIN USBD_VIDEO_StreamRequest */
 UX_PARAMETER_NOT_USED(video_stream);
 UX_PARAMETER_NOT_USED(transfer);
 /* USER CODE END USBD_VIDEO_StreamRequest */
 
 return status;
}

How to fill it, that it works?

Thanks

Johannes

[Johannes]

Hello Mohamed

Can you explain how the uncompressed video stream is composed? Are these individual images as well? Which format are they and how are they generated?

Johannes