RepRap-Firmware-for-mbed-microcontroller is a project mainly written in ..., it's free.
firmware for 3d printers, based on Tonokip firmware, ported to mbed mcu
This is a firmware for a RepRap 3D printer.
The original firmware was created by tonokip for the Arduino platform. This firmware was ported to the mbed microcontroller platform. It is running on my Prusa Mendel.
I use ReplicatorG to control the printer:
You can use the .brd and .sch files in the Eagle_files subdirectory for a first PCB prototype. It can connect the mbed board to the Sparkfun Quadstepper Motor Driver board (sku: ROB-10507) JP5 can connect a Sparkfun Thumb Joystick (sku: COM-09032)