On Sep 26, 2009, at 12:39 PM, Quintin Beukes wrote:

> The problem can be reproduced, however, by finish reading from the
> serial interface, then later one doing an exit(0). After doing that a
> few times all serial comms in the future are messed up.

So you are undoubtably running into the differences between doing a  
"real" reset and the partial re-start that happens (perhaps) when you  
do exit(0).   A "real" reset will return most of the peripherals to a  
default state, as well as restarting the program. A "software reset"  
might ONLY return the program to its start address, with the  
peripherals still running.  Without being really careful, it is very  
easy to get (for example) a serial interrupt before your code has  
initialized the serial ISR service routine variables, causing ...  
trouble.

As others have said, doing exit(0) at all is a bad idea.  If you ARE  
going to do this, you could try to reset some of the peripherals.  As  
a minimum, be sure to turn off the global Interrupt enable before  
doing exit().

BillW

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