qmk_userspace/keyboards/tutte_coxeter_36k

Tutte Coxeter 36k

This is firmware for an Raspberry Pi Pico PR2040 controller monoblock 36 key design (three rows of five, and three thumb keys, for each hand). This is a diode-free design with a sparse 13 by 13 scanning matrix designed using a partial Tutte-Coxeter graph (using only 26 vertices or GPIO pins with 36 edges or keys - see this blog post for background, although the final pin selection and trace routing changed).

The first physical PCB for this is designed to fit in the Gamma Omega keyboard case, and use the same Raspberry Pi Pico based microcontroller board.

• Keyboard Maintainer: Peter J. A. Cock
• Hardware Supported: Tutte Coxeter 36k (single PCB) with Raspberry Pi Pico
• Hardware Availability: https://github.com/peterjc/gamma-omega

Make example for this keyboard (after setting up your build environment):

make tutte_coxeter_36k:default

Flashing example for this keyboard:

make tutte_coxetter_36k:default:flash

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.

Bootloader

Enter the bootloader in 3 ways:

• Bootmagic reset: Hold down the key at (0,0) in the matrix (bottom left key, Qwerty z) and plug in the keyboard
• Physical reset button: Briefly press the button on the back of the PCB - some may have pads you must short instead
• Keycode in layout: Press the key mapped to QK_BOOT if it is available