So you want to hack on the tpad's firmware! No? well then you are probably just trying to flash the latest firmware. You can do that with the tpad flash command. See: http://github.com/tmpvar/tpad/ for instructions.

Either way, it's really a painless process, I promise!

you will need avrdude and avr-gcc

sudo apt-get install avrdude gcc-avr libusb-1.0-0

Install CrossPack

install winavr

First off you are going to want to clone this project

git clone https://github.com/tmpvar/tpad-firmware.git
cd tpad-firmware/tpad/tpad4-mega

If you are running a device other than the tpad4-mega you'll want to cd into the proper directory.

Grab yourself a writing stick (a pen works fine). We'll be using it to reset the tpad into "bootloader mode" so we can flash the new firmware. Press the reset button on the bottom of the tpad. (there should be a hole for you to stick the pen into) and run:

AVRDUDE_PORT=`ls /dev/tty.usbmodem*` make avrdude

If the programmer times out, you will need to repeat this process again (faster this time!).

The majority of this code is LUFA, you can find the licensing info here

The tpad/** directory is MIT licensed, copyright Elijah Insua 2012 (unless otherwise noted)