The AVR testing Dvice To Make 1)Open Makefile 2) set the BURNMCU the the Chip Type ex)BURNMCU = attiny85 3) set the BURNPROGRAMMER to the Chip Programer ex)BURNPROGRAMMER = buspirate 4) set the PORTPRO the the Chip Programer's Port ex) PORTPRO = /dev/tty.usbserial-Flashy //unix osx PORTPRO = com3 //windows 5) windows install Winavr (http://winavr.sourceforge.net/) OSX instal CrossPack (http://www.obdev.at/products/crosspack/index.html) Unix install AVR dev tools (http://www.ladyada.net/learn/avr/setup-unix.html) 6) windows open CMD and CD to sorce dir. unix & osx open a termanal and cd to sorce dir. 7) Run Make 8) Run Make burn ***note****per(http://vusb.wikidot.com/troubleshooting) 9.- Don't compile for 'P' series chips - There is an issue in the driver where some interrupt tables are named in a way that isn't compatible with chips that have a 'p' after their name - i.e. ATmega168p, ATmega3280. This is tricky, since the code will compile, but just won't work. However, the 'p' series chips are binary compatible with their non-'p' cousins, so if you're working with an ATmega168p, compile for a regular ATmega168. The ATmega328p has no non-p variant, but it's binary-compatible with the ATmega168, so compile for the ATmega168. You may also try defining "USB_INTR_VECTOR" as "INT0_vect" in "usbconfig.h", or replacing "SIG_INTERRUPT0" with "INT0_vect" in "usbdrvasm.S" (around line 60 in version 20090822). This problem may have already been fixed in version 20100715.