RE: [Simulavr-devel] anacomp getting reserved access messages

[Schwichtenberg, Knut]

RTFM helps :-)! The gcc-version you are using is inserting code that chages 
reserved cells! Reading the datasheet makes it clear 0x5e is Reserved! 0x5f is 
SREG and 0x5d is SP (not SPL/SPH) - so this depricated CPU shows cells that are 
marked reserved, gcc inserts code that changes them and simulavrxx detects it. 
Everything is fine!

Fast work-around: Change the CPU to M128 and ensure you also change the analog 
comparator pin accordingly.

No simulavrxx error!

> -----Original Message-----
> From: Joel Sherrill [mailto:address@hidden 
> Sent: Thursday, March 26, 2009 2:12 PM
> To: Schwichtenberg, Knut
> Cc: address@hidden
> Subject: Re: [Simulavr-devel] anacomp getting reserved access messages
> 
> I captured a trace and deleted all of the stuff below the error.
> It appears to be happening very early in main.c.
> 
> Look for RESERVED.
> 
> --joel
> 
> Joel Sherrill wrote:
> > Schwichtenberg, Knut wrote:
> >   
> >> Joel,
> >>
> >> here you find a usage for  "-W 0x20,-". 0x20 in the 
> RAM-Area of the AVR is identicall to 0x00 in the IO-Space 
> which is forbidden by most AVR's. This loop puts normally 
> 10.000 "*" on you terminal. Maybe it's in there to delay or 
> only to confuse the maintainer ;-). 
> >>     
> > I thought of that but there was no way to turn that on via Tcl
> > until I did my work.  So I guess this is just a left over 
> hunk of code.
> >
> >   
> >> BTW: The comment block at the top of the source is fully 
> nonsense in conjunction with the source code.
> >>
> >>   
> >>     
> > :)
> >   
> >> The 0x5e - I'm guessing - might have to do with compiling 
> the source for CPU A and using it on CPU B, is it?
> >>
> >>   
> >>     
> > The reserved message can also come out when the CPU
> > .cpp file has temporarily marked it as such.
> >
> > set dev1 [new_AvrDevice_at90s4433]
> >
> > And this code is in that cpu
> >
> >         rw[0x5e]= new RWReserved(this);
> >
> > Is this a known register name?
> >   
> >> Knut
> >> 
> ----------------------------------------------------------------------
> >> This mail is made from 100% recycled electrons. 
> >>
> >>   
> >>     
> >
> >
> >
> > _______________________________________________
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> >   
> 
> 
> -- 
> Joel Sherrill, Ph.D.             Director of Research & Development
> address@hidden        On-Line Applications Research
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>