13 Replies Latest reply on Jun 16, 2020 12:35 AM by HemanthR_06

    commit error and back flow error in UVC AN75779

    AvC_4590276

      Hi Readers,


      I have taken UVC (AN75779) as a reference design. in which I have changed the UVC descriptor to USB descriptor (0X83 IN Endpoint) and Using the same GPIF interface.

       

      FPGA is connected to the FX3 through the GPIF interface. From FPGA I am sending counter data 2712 bytes/line and 10848 bytes/frame to the FX3 at 40MHZ speed.

       

      when I am reading the data from the host, I am getting backflow error and DMA commit error because of that I am getting loss of frame and getting some data less than the actual frame size(less than 10848).

       

      Please suggest what can I try to resolve the DMA commit and backflow error.

       

      Thanks