0 Replies Latest reply on Dec 6, 2017 5:50 AM by roman.tcharny_2243706

    UVC error while sending to host uvc control state through EP0




      We've implemented UVC video streaming with CX3 using our own sensor. Lately, we wanted to utilize some uvc controls(focus) and we have a problem in usb high speed mode. CyU3PDmaMultiChannelCommitBuffer() fails with 71 error (CY_U3P_ERROR_INVALID_SEQUENCE) if we send uvc control value through EP0 to the host during streaming.


      I found this article, about similar problem I think, in Knowledge Base Articles: EZ-USB® FX3™ Issues With Simultaneous Bulk-IN and Control-IN Transfers In USB 2.0 – KBA92475 , but the proposed workaround isn't working for our uvc streaming application. Is there another way to send the uvc control to the host without interruptions in streaming?



      Roman Tcharny