VISA usb, read problems

Question

Hello,
I'm doing a project where Labview must communicate with a uC (microchip, mikroC PRO for PIC). Unfortunately, it doesn't work correct, sending data to the uC is good but cann't transmit data to the PC (Labview). The program remains in the loop "while (! HID_Write (& writebuff2, 64)). '
For writing and reading, I use the example program "USB RAW - bulk.vi". If I 'pushed the Bulkin button then I get the following error welding "Error -1073807302 occurred at VISA Read in USB RAW - Bulk.vi" but if I click Bulk Out, then I receive data in the uC.
Can someone help me maybe? thanks 
Piece of uC code:
unsigned char readbuff2[64] absolute 0x500;   // USB Buffers should be in USB RAM
unsigned char writebuff2[64] absolute 0x540;  // USB Buffers should be in USB RAM
void USB_enable()
  char cnt;
  HID_Enable(&readbuff2,&writebuff2);     
void USB_Communication()
  char Read_Reg;
  if (HID_Read())
    switch (readbuff2[0])
      case Reg_Addr_Software_Version:      //read Software_Version
        writebuff2[0]= Reg_Addr_Software_Version;
        writebuff2[1]= Software_Revision_H;
        writebuff2[2]= Software_Revision_L;
        writebuff2[3]= 0;
        break;
      default:
        writebuff2[0]= Reg_Addr_Automatic_Response_Warning;
        writebuff2[1]= 0;
        writebuff2[2]= Address_Fail;
        writebuff2[3]= 0;
        break;
    while(!HID_Write(&writebuff2,64));
  } // end HID_Read()
Solved!
Go to Solution.

Answer 1

Did you look at the links describing the solution?
"Yes I solved the problem.
I found the solution in this topic: http://forums.ni.com/t5/LabWindows-CVI/Control-PIC18F4550-via-USB-with-LabWindows-CVI/td-p/694804
And see the solution in topic:
http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/VISA-RAW-FOR-USB-USING-PIC18F4550/m-p/2064030...
Regards,
Ronald"
He said: "The descriptor file (USBdsc.c) of MikroC Pro was not correct" and made some modificacations described in the forum post
Taylor B.
National Instruments