Since the project has frame data that is in MJPEG format, and the descriptor says that the device supports YUY2 format.
This is the reasong for not streaming the data.
In order to show the video, the frame data should be in YUY2 format.
The SDK provides a firmware that eneumerate as USB Video Class device and streams YUY2 format.
Please check it if you are looking for similar example project C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.3\firmware\fx2g2_examples\cyfx2_uvcdemo
Thank you very much！I think i can do the next work!