> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of beckiewynn@yahoo.co.uk
> Sent: Saturday, April 01, 2006 4:51 PM
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] C18 and "large" arrays
> 
> > > I have an array of 299 chars, but I have a problem - after 255 the
> > > array wraps round, i.e. if I do
> > > a[257]=1
> > > then I will get a[1]=1
> > > Why is this happening?
> > > I define the array like so:
> > >
> > > static byte a[299];
> > >
> > > thanks,
> > > Andy.
> > What size is your index variable, sounds like its only
> > 8 bits.
> 
> No, it happens also with literals, i.e. if I do
> a[257]=1 and actually use '257' then I get a[1]=1
> 
> >
> > Jim

Caveat that I don't use this compiler:

But can you cast the literal?  Such as a[(unsigned int)257]?

PIC C compilers are really C-like but similer approaches work with C
compilers.  I don't know if this complier supports things like U or L as
part of a literal.  I use 256L for example in some 16-bit compilers to
force the literal to be 32 bits to get rid of warnings sometimes like
when comparing a literal to a variable.  Will 257U work for you in this
case?



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