And that's exactly the point. If this works and it takes longer to see an error, then it follows that the timing is the culprit, and means can be taken to correct that problem. Jim -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Jinx Sent: Friday, January 12, 2007 5:00 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] Very odd problem with RS232... > You may be getting out of sync with the PIC and the PC if the > frequency is off by more than a few percent. Try lowering the > baud rate on both the PC And your PIC board, and see if that makes any > difference Lowering the baud rate will just make errors take longer to happen. If it is a timing problem, the PIC clock needs to be changed to match the baud rate from the PC Sam, are you going through an RS232 i/f (eg MAX232) ? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist