3 Replies Latest reply on May 31, 2018 4:44 AM by srnt

    CYUSB3014-BZXC chip FLAGA signal problem

    shishu_3452426

      Description: When the FPGA sends data to the PC through the USB chip, after running for a period of time, the PC will no longer receive data, and the FPGA will not send data anymore. At this point, the USB chip FLAGA signal does not go low, so the FPGA cannot send data all the time.

       

       

      Question: Why is the usb chip FLAGA signal always high? What caused the usb chip to no longer receive data?

       

       

      框图.jpg

       

       

      FPGA FLAGA signal

       

      flaga问题.png

       

       

      Pc log error

       

      transfer status: LIBUSB_TRANSFER_ERROR

      UHD Error:

      The receive packet handler caught a value exception.

      ValueError: bad vrt header or packet fragment

      terminate called after throwing an instance of 'uhd::usb_error'

      what():  RuntimeError: USBError -4: usb rx6 submit failed: LIBUSB_ERROR_NO_DEVICE

      transfer status: LIBUSB_TRANSFER_NO_DEVICE

       

      --------------------------------------------------------------------------------------------------------

       

       

      template <typename buffer_type>

      UHD_INLINE typename buffer_type::sptr get_new(const double timeout)

      {

      if (wait_for_completion(timeout))

      {

      ///*qiaoping

      if (result.status != LIBUSB_TRANSFER_COMPLETED)

                      throw uhd::io_error(str(boost::format("usb %s transfer status: %d")

                                              % _name % libusb_error_name(result.status)));

      //*/

      if (result.status != LIBUSB_TRANSFER_COMPLETED)

      std::cout << boost::format("transfer status: %d") %  libusb_error_name(result.status) << std::endl;

      result.completed = 0;

      return make(reinterpret_cast<buffer_type *>(this), _lut->buffer, (_is_recv)? size_t(result.actual_length) : _frame_size);

      }

      return typename buffer_type::sptr();

      }

       

       

      Screenshot from 2018-05-29 10-16-42.png

       

        • 1. Re: CYUSB3014-BZXC chip FLAGA signal problem
          srdr

          Do you have feasible to check the Debug Prints?

          If yes, please collect the logs and post here.

          • 2. Re: CYUSB3014-BZXC chip FLAGA signal problem
            shishu_3452426

            thank you for your replay

             

             

            Pc log error

             

            transfer status: LIBUSB_TRANSFER_ERROR

            UHD Error:

            The receive packet handler caught a value exception.

            ValueError: bad vrt header or packet fragment

            terminate called after throwing an instance of 'uhd::usb_error'

            what():  RuntimeError: USBError -4: usb rx6 submit failed: LIBUSB_ERROR_NO_DEVICE

            transfer status: LIBUSB_TRANSFER_NO_DEVICE

             

            --------------------------------------------------------------------------------------------------------

             

             

            template <typename buffer_type>

            UHD_INLINE typename buffer_type::sptr get_new(const double timeout)

            {

            if (wait_for_completion(timeout))

            {

            ///*qiaoping

            if (result.status != LIBUSB_TRANSFER_COMPLETED)

                            throw uhd::io_error(str(boost::format("usb %s transfer status: %d")

                                                    % _name % libusb_error_name(result.status)));

            //*/

            if (result.status != LIBUSB_TRANSFER_COMPLETED)

            std::cout << boost::format("transfer status: %d") %  libusb_error_name(result.status) << std::endl;

            result.completed = 0;

            return make(reinterpret_cast<buffer_type *>(this), _lut->buffer, (_is_recv)? size_t(result.actual_length) : _frame_size);

            }

            return typename buffer_type::sptr();

            }

            • 3. Re: CYUSB3014-BZXC chip FLAGA signal problem
              srnt

              Hello Shi Shu,

               

              - Please let know if you have the UART functionality in the firmware to implement the UART debug printing. If yes, kindly, share the UART logs.

              - Also, please let know if you are referring to the AN65974 app note for your implementation.

               

              Best regards,

              Srinath S