I have two ATmega8 -s which I could program using your USB Programmer, but in between circuit changes (on the breadboard) I cannot program them anymore. I can’t even read the signature bytes.
avrdude: stk500v2_command(): unknown status 0xc9
avrdude: stk500v2_program_enable(): cannot get connection status
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
Entering programming mode… FAILED
* popup message about ISP programming failing *
Exiting programming mode… OK
The m8 -s can be programmed without hassle on a STK500 and your programmer works perfectly with a m32. Together, however…
I have disconnected all the parts from the microcontrollers and tried to program them -> nothing
I tried programming them without the crystal oscillator -> nothing
I changed the ISP frequency -> nothing
I changed the voltage detection limits using the Pololu configurator -> nothing
I tried rebooting the computer(s), the programmer, redid the uCs’ connections -> nothing
I checked all the wiring and everything proved to be ok
the fuses don’t seem to be wrong
I haven’t tried changing the Hardware and Software versions inside the configuration utility and it’s quite cumbersome to get access to a Windows computer and do it. What are some valid combination to try for when I’ll have access?
What other things can I try?
Edit: the problem is very similar with USB ISP problem , but I can’t read anything from the uC