Extract .hex from ATtiny45 using Arduino

Question

As it is possible to program a ATtiny45 using Arduino as ISP Programmer, is there a way to backup an ATtiny45 program to a .hex file using Arduino?

• Gerben: You'll have to use the commandline for that. Inside the arduino program folder there is another executable called avrdude. You need to call something like avrdude -pattiny45 -cstk500v1 -Uflash:r:filename.hex:i

Answer 1

Assuming the lock bits on the device haven't been set, sure. Simply prepare the Arduino for ArduinoISP, hook up the ATtiny45, and perform a read using AVRDUDE instead of a write (-U flash:r:foo.hex:i).

• Chris Stratton: Sorry, totally missed your mention of that.