AVR-Chat

--- In AVR-Chat@yahoogroups.com, Ned Konz <bikenomad@...> wrote:
>
> 
> On Feb 15, 2006, at 3:57 AM, houman wrote:
> 
> > I had a problem about debugging programs in avr studio.I load 
the obj
> > file created with codevision and run the simulator.I can see the
> > general purpose registers and other registers' value, but the 
thing is
> > when I drag a variable to watch window it says not in scope.
> > even when I drag TCNT0 it gives me the same massage.Would you 
please
> > help me on this matter.
> > thanks,
> 
> I don't know about Codevision, but in avr-gcc, registers like 
TCNT0  
> aren't really variables; they're actually #defined as lvalue  
> expressions like this:
> 
> #define TCNT0 _SFR_IO8(0x32)
> 
> which then expands to
> 
> (*(volatile uint8_t *)((0x32)+0x20))
> 
> and so they're not really variables (and can't be watched, unless 
you  
> have the ability to watch an arbitrary expression like that).
> 
> Instead, you can look at the RAM space at the right address (in 
this  
> case, on the Atmega128, it would be RAM address 0x52). (Or 
register  
> 0x32, when used with the IN or OUT instructions).
>

thanks for your message.I could solve the problem.I should have 
Loaded the file with .coff extension in order to be able to watch 
the varibles.