The firmware for my Corne (or CRKBD) keyboard.
This repo has a build.sh that applies the patches to the qmk_firmware submodule. The three C source files (rules.mk, config.h and keymap.c) are put into a custom keymap directory in qmk_firmware by that same script, and then qmk build is run to compile them.
Well, qmk.
A Corne keyboard that uses the heavily unsupported STeMCell v1.0.0 microcontroller.
This microcontroller is why we need to add CONVERT_TO=stemcell -e STMC_US=yes to the qmk build command and edit the info.json file to swap the B1 and B2 pins, yay!
LED lights are not supported, neither in keys (backlight) nor the underglow ones.