Problem with usb_cdc_getc() [Solved]

[sarodrig]

I'm pulling my hair out over this one. I've got the USB code mostly working. It enumerates fine and shows up as a COM port on my PC.

Using two hyperterminals, I'm able to send characters from my serial port to USB. However, when I send a character from USB to RS232, I always receive the same character, regardless of what I type. Each character generates an interrupt, as it should, but it receives the same char each time.

One thing that's interesting is the character that gets received sometimes changes with a power cycle on the board, but otherwise, it's the same for any given session.

I'm able to manually putc() to RS232 and usb_cdc_putc() to USB any text that I choose, and it works fine. I can do this repeatedly and it never hangs, so I think the hardware is fine. The only thing not working properly is usb_cdc_getc().

I'm using a PIC18F2550, CCS 4.094 with an ICD2.

Anyone else had as similar problem? I've searched the forums and found nothing like this.

[sarodrig]

Somehow, I managed to corrupt my usb_cdc.h file, breaking it only enough to cause this problem. I recopied the file from the original PICC\drivers directory and the problem went away. I only wish I tried that earlier!