USB recognition error - Code included

AdnanNovak — Tue, 02 Aug 2011 03:03:44 GMT

Hey:

How come a few lines of code in my program is not letting windows recognize my board even though the code is not even being run. Its using the CMX-USB stack.

-Tic Counter is a timer intterupt.

-Sending bits back and forth between my board and PC

Here is the code :

ticCounter = 0 ;
            while ( ticCounter < 10 )
              { }

                hid_write_report(in_report, &opcode2[0]);

                hid_process();

                ticCounter = 0 ;
            while ( ticCounter < 10 )
              { }

              while (!hid_report_pending(out_report))
              {

              }

             ticCounter = 0 ;
             while ( indata[0] != 0xc0 && ticCounter < 100   )
             {

                hid_read_report(out_report, &indata[0]);

             }

             ticCounter = 0 ;
            while ( ticCounter < 10 )
              { }

              hid_write_report(in_report, &opcode2[8]);

                hid_process();


                ticCounter = 0 ;
            while ( ticCounter < 10 )
              { }

              while (!hid_report_pending(out_report))
              {

              }

             ticCounter = 0 ;
             while ( indata[0] != 0xc1 && ticCounter < 100   )
             {

                hid_read_report(out_report, &indata[0]);

             }

Everytime I comment this portion of my code out, my USB is correctly recognized by windows but with this code in, my fails to initialize in windows. This portion of my code is not even supposed to be reached without a command from the PC. How can this inured code cause this? I can give more information. Thanks

Re: USB recognition error - Code included

Tsuneo — Thu, 04 Aug 2011 13:46:42 GMT

I have an impression that the code does nothing so bad.
Overflow of the code or RAM space?
Or, stack overflow, if the code is called from USB ISR.

You may confirm it with a map; file.

Tsuneo

Re: USB recognition error - Code included

JimDon — Thu, 04 Aug 2011 21:15:13 GMT

With out seeing all the code, I would ask if this code runs before the device is done intializing.

If you try to send data before it is ready, it will crash and not be recognised.

topic Re: USB recognition error - Code included in 8-bit Microcontrollers

USB recognition error - Code included

Re: USB recognition error - Code included

Re: USB recognition error - Code included