Re: [avr-chat] ATXmega and usersig

[Erik Walthinsen]

On 04/12/2012 09:10 AM, Alexander Krause wrote:
> Anyway, I read that there also is an erase command for the usersig and
> avrdude does not implement any option for it. I'll try the current AVR
> Studio and will see if I can somehow change my usersig in there.

I ran into this awhile ago and basically determined that in order to 
fully support the Xmega (and future?) avrdude needs to re-arrange the -E 
and erase commands so they can erase specific regions, presumably 
defaulting to a sane list of "semi-volatile" regions specifically *not* 
including the usersig.  It would take over the function of the "don't 
erase the EEPROM" flag with a more generic approach.

I ended up giving up on usersig a while back for that reason, and just 
store my signature in EEPROM for now.  I will need to be able to use the 
usersig again at some point soon though ;-(