Re: [AVaRICE-user] avarice and avr-gdb problem

[Blake L. <ble...@at...>]

On Sunday 03 February 2008, pl...@ap... wrote:
> Hi,
>
> First thanks to all for the previous anwsers to my questions !
>
> I can now program my ZigBit with avarice/jtagice mkii with my linux box.
>
> I try to debug a ZibBit module with an Atmega1281 inside with avarice and
> avr-gdb (freshly compiled from gdb!)
>
> I can program and start the debugging with avarice, then I connect with
> avr-gdb and I try some command to start debugging and it's stop with the
> error :
> cannot read program counter
>
> Any idea ?
>
> Thanks
>
> Philippe

I don't see anything wrong with your commands.  I do wonder about a few 
things.

Why do you use the -l option?  I don't think that is needed for debugging.

I see you are using gdb-6.7.  I downgraded to 6.6 because I was getting 
these "watchdog expired" messages.  However, I later discovered that I was 
specifying the wrong part number, which was bad.  I decided to use 6.6 
because that's the version WinAVR uses, and that has had significant testing 
with the AVR parts.

Also, if you only have one jtagice box attached on usb, you can simply use 
the "-j usb" option without the jtag address.  Saves some typing.

Just as a reference point, I can program/debug the Zigbit with these two 
commands:

avarice -j usb -2 -P atmega1281 --erase -f project.hex
sleep 2
avarice -j usb -2 -P atmega1281 :4242 --detach

I use avr-gdbtui, which shows the source code automatically.  And I use 
KDevelop, which is a GUI debugger, for times when I need to step through a 
lot of code.

Blake