I'm programming ATtiny84 (Jeenode µ) from an UNO used as ISP. I've written fuses, load some sketches. Now it is't anymore possible, I get following error :
avrdude -C/home/remi/Developpement/Embarqué/Arduino/IDE/arduino-1.5.2/hardware/tools/avrdude.conf -q -q -pattiny84 -cstk500v1 -P/dev/ttyACM0 -b19200 -e -Ulock:w:0xFF:m -Uefuse:w:0xFF:m -Uhfuse:w:0xD7:m -Ulfuse:w:0xC2:m avrdude: please define PAGEL and BS2 signals in the configuration file for part ATtiny84 avrdude: Yikes! Invalid device signature. Double check connections and try again, or use -F to override this check.
I've triple checked wires, reload ISP sketch on UNO... nothing changed. I've changed serial speed. Googled some help.
Then I've written fuses and upload sketch an another ATtiny84 : it works fine.
One of my ATtiny seems unprogrammable although wiring are OK? Have you got some explanations? how can I recover it?