[avrdude-dev] Debug Output for AVR910 programmer mode

[Dean Camera]

Hi guys,

I'm currently developing a CDC class USB bootloader for the USB AVR 
microcontrollers, which uses the AVR910 (AKA AVR109) serial protocol. It's 
fairly straightforward but giving me much grief.

Manually sending commands via a serial terminal works fine - the correct values 
are reported back. However, with AVRDUDE, the "Set Address" command fails when 
trying to connect to the bootloader. Again, sending this command manually 
results in the correct response.

What I'm looking for is a "debug" mode for AVRDUDE, allowing me to see the 
issued commands and received responses in full so I can see the exact chain of 
commands leading up to the fault. Using the verbose mode doesn't give this 
info, and I need it to try to work out where to start looking for bugs.

Help greatly appreciated.

- Dean