I am able to get UVC USB packets out from FX3. Actually I had not done anything except power cycle FX3 explorer kit.
But DirectCap still show a blank screen with 0 fps.
Using USB monitor, I can see streams of 16380 byte sized bulk packets (12byte header + 4092 * 4). The UVC header is present. So it seems video has been transmitted out of FX3.
I notice that for each 32bit YUV2 color data in the bulk stream, 16 bits are always zero. This is not what I am sending. So I stop FX3 execution and found the same 16bits zero in DMA buffer. So I think the problem occur during GPIF sampling.
Any advice how to get all 32bits capture correctly?