Support for USB BULK-cameras

[lninio]

Hello, RSTA2!
I'm trying to add support for USB cameras to your code that use BULK transfer to transfer images. To do this, I added a new supported interface ("inte-2-0" - videostreaming interface) to the USBDeviceFactory.c file. In its configuration function, I first read the frame descriptors, which contain the height and width of the frame (descriptor class - 0x24, descriptor subclass (next byte) - 0x05 (uncompressed frame)), then I set the camera settings using the standard request to the camera.
First, I use the following pseudocode for negotiations:
DWHCIDeviceControlMessage (arg0, arg1 (endpoint0), 0x21, 1 (set_cur request), 0x100 (probe_control), 1, &buffer_with_parameters (table 4-47 in USB Video Class specification v.1.1), 34 (length_of_buffer));
DWHCIDeviceControlMessage (arg0, arg1 (endpoint0), 0xA1, 0x81 (get_cur request), 0x100 (probe_control), 1, &buffer_with_parameters (table 4-47 in USB Video Class specification v.1.1), 34 (length_of_buffer));
DWHCIDeviceControlMessage (arg0, arg1 (endpoint0), 0x21, 1 (set_cur request), 0x200 (commit_control), 1, &buffer_with_parameters (table 4-47 in USB Video Class specification v.1.1), 34 (length_of_buffer));
And then the problem arises, which is that I do not know how to start a BULK broadcast from the camera.
Can you tell me how to start broadcasting the image? I would appreciate your help.

Best regards
Lninio

[rsta2]

Unfortunately I'm not familiar with this USB device class. Sorry, I cannot help you here.

[lninio]

Thanks for the reply. I found a way to solve the problem. I used a USB bus sniffer from Linux called usbmon in order to analyze the correct initialization and exchange with the camera. Using the data from Linux as a hint, I managed to organize the data transfer from the camera.