Re: [Simulavr-devel] Simulating atmega169

[Klaus Rudolph]

Hi,


> Is there any chance of simulating the atmega169 on simulavrxx (as it seems 
> this chip is not supported yet)?
Actually it is not implemented, but it is "easy" to add a mega169 device 
if there is no special
peripheral in mega169. I actually have no idea which is special for 
mega16/9. To simulate
the mega16 series you simply have to shrink the ram/rom/eeprom size of 
mega128. For special
features only provided in mega16/9 you have also to impement the 
specials, but only if you use them :-)
And if you compile your program for a mega128 it should normaly work 
well enough to find all
logical problems in your code. The changes in hardware for the 
peripherals are really small, so doing the
final modifications and compilation for your target mcu should not the 
big problem. (I hope :-)



> And how can I follow the varriables in 
> stepping mode inside an interrupt in avr-gdb if it sais that the line numbers 
> are hidden and afterwards it hangs in most of tries?
>
>  
???
Simply set the breakpoint from ddd or gdb in the irq handler and step as 
you step in all the other
parts of your code. There is no known problem in doing this. If you 
found one, please report
in detail, maybe with source and Makefile so that we can reproduce it. 
Please do NOT add any objects! I have my own
compiler :-)
Maybe the compiler has optimzed the code so much, that your "real line 
of code" is thrown away.
Maybe you better step within the assembly window of ddd/gdb.
And as a third hint: If you have a c/c++ file which contains non ascii 
chars sometimes gdb have no chance
to find the corrosponding line numbers from the debug information. This 
could result in terrible output from gdb/ddd
while stepping through the code.
And at last :-) Please use actual variants of avr-gcc/gdb.

I have not a real idea which problem you have, so please feel free to 
ask again! Your message that something is hanging while
stepping through the code is a bit "misterious" :-)

Best regards
 Klaus