I'm using USB OTG port on UP Board with micro-USB (type B) to USB (type A) cable. Since you are using an UP board (CHT) and your configuration works when using a USB hub, have you contacted them to check the requirements for the board USB connections to be compatible? If possible, we would like to have more information about this. Thank you for the reply! You could find answers on your questions and some more details below. Unfortunately, I couldn't approve this just right now, because of I doesn't have this camera yet. And of course my emulator acts according to USB 2.0 specs.Īlso, I remembered that my colleagues saw the same behavior with real USB 3.0 camera. It looks like a NUC USB bug for me, because of my emulator works fine on NUC 7 and KBL host, it even works as expected with NUC 8 + USB HUB. I found that the reason why stream is not started is in that the host (NUC 8) missed to send second STATUS packet on the SET INTERFACE packet, when the gadget (UP Board) replied on first STATUS packets with NAK. I checked DWC3 (my camera gadget controller) driver trace events on emulator device and compared it with wshark captured packets on host. I tried to start stream with NUC 8 + USB 2.0 HUB + my camera emulator and it started successfully with this configuration. When I try to use it with NUC 8, it fails to video start stream. It works fine with NUC 7(KBL) and Coffee Lake PC. I have UP Board (CHT) which emulates USB 2.0 HS UVC camera.
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