Use of a Teensy 2.0 to create a USB-gamepad.
Initially this was thought to be to play frets on fire, but then the code was used to create a normal gamepad (without guitar style).
Install avr-gcc:
# ArchLinux
sudo pacman -S avr-gcc
Build
make
Install teensy-loader-cli
# ArchLinux
yaourt -S teensy-loader-cli
Start teensy-loader-cli and press reset button:
teensy-loader-cli -mmcu=atmega32u4 -w guitar.hex