LPC11U37 USB Virtual Serial Project USB_USBTask Blocking Problem

lpcware — Wed, 15 Jun 2016 16:49:49 GMT

Content originally posted in LPCWare by sarangkalbande on Tue Aug 27 00:00:06 MST 2013
Hi,
I am working on lpc11u37 USB Virtual serial Project.
I got the project from LPCOpen and Its working fine it detects USB as com and echo the characters

Now the problem is,

while (1)
    {

     status=phpalI14443p3a_ActivateCard(&I14443p3a, NULL, 0x00, bUid, &bLength,
                                              bSak, &bMoreCardsAvailable);

     if (status != PH_ERR_SUCCESS)
        {

        Buzzer_Off();

        }
     else
        {

          status = phalMfc_Authenticate(&alMfc, BLOCK_AUTHENTICATE, PHHAL_HW_MFC_KEYA,
                                         0, 0, bUid, bLength);

             if (status != PH_ERR_SUCCESS)
                {

                     Buzzer_Fail();

                }
              else
                 {
                   status = phalMfc_Read(&alMfc, 2, &CardDataBuffer[0]);
                   if (status != PH_ERR_SUCCESS)
                     {

                       Buzzer_Fail();


                      }
                   else
                      {
                   Buzzer_Pass();


                    UART_Send(&CardDataBuffer[0],0x10); //DATA SEND USING SERIAL

                   EchoCharacters(CardDataBuffer,16); //data send using USB
                   phpalI14443p3a_Sw_HaltA(&I14443p3a);
                   IsDataAvailable=0;

                       }
                  }
         }

   USB_Task();

}

Now,In the above program USB_Task() function should always be in the while(1) loop.
I have also my card detection logic which always fails at authentication if USB_TASK() Function is dere
But when I comment USB_Task() then everything works fine

what could be the problem..I have tried everything like changing current consumption value,end point polling
interval,disabling all the interrupts except USB then also I am facing the problem.

I think the problem is related to blocking or what?and how to solve the same

Re: LPC11U37 USB Virtual Serial Project USB_USBTask Blocking Problem

lpcware — Wed, 15 Jun 2016 16:49:50 GMT

Content originally posted in LPCWare by sarangkalbande on Wed Aug 28 06:09:52 MST 2013
NXP Team ..kindly reply fast

LPC MicrocontrollersのトピックLPC11U37 USB Virtual Serial Project USB_USBTask Blocking Problem

LPC11U37 USB Virtual Serial Project USB_USBTask Blocking Problem

Re: LPC11U37 USB Virtual Serial Project USB_USBTask Blocking Problem