I'm wondering if anyone else has come across strange behaviour sometimes
when using local function variables with HiTech's PIC C compiler (latest
version - 8.05PL2, and also 8.03PL3)?

The contents of temporary local variables in some of my functions are
getting overwritten without reason. By changing them to static it fixes the
problem.

I'm having to allocate a lot of the other variables in 3 of the banks, so
I'm wondering if that is a cause? I've turned off all optimization and it
still happens. At no point does any of my code write to an address in RAM
except via a pointer to a variable, so I can't see how these variables are
getting overwritten.

What makes it so much harder to track down is that it doesn't happen in the
MPLAB similuator but only when I program the PIC, of course! ;) So I'm
debugging with a scope and some diagnostic pin output...

I've been using this compiler for a couple of years without this trouble
before, but with this code it's happening all over the place. I've never
targeted this PIC (16F876A) before, but I doubbt that's central to it.

I could raise this on HiTech's forum but that gets little traffic. I'm
really looking for any experiences from people here that could backup or
otherwise what I think I'm seeing! Many thanks.

James

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist