> >-----Original Message-----
> >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]
> >Sent: 27 April 2005 14:56
> >To: Microcontroller discussion list - Public.
> >Subject: RE: [PIC] HiTech C and Local Variables
> >
> >
> >Hi Mauricio,
> >
> >Thanks for your post. TBH I've been doing that for the last
> >few days. (divide and conquer - the most basic debug approach
> >of course.) It's proving extremely hard to pin down though.
> >Keep plugging away I know! ;)
> >
> >The fact that no one so far has said "yes, HiTech C can cause
> >trouble sometimes with local vars" indicates at least it is
> >probably my fault and not the compiler, so I am in a position
> >to deal with it I think.
> >
> >James
>
>
> James,
>
> Yes, Hitech can cause trouble sometimes with local vars!  However, only
> under very specific circumstances.  If you enable optimisations, the
> compiler attempts to use as many redundant (for that function) SFR's as
> possible to contain local variables, such as PRODH, PRODL, FSRx etc.  If
> you include inline assembly that uses these registeres, the compiler
> can't "see" it, so local variables can get scrubbed unintentionaly.
>
> Regards
>
> Mike
>

Hi Mike,

Thank you for the info! That is interesting. I did try turning off all
optimizations, (compiler and assembler) in case it might be the cause of the
trouble, but it made no difference in my case - more evidence that it's my
code at fault, somewhere...

James

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