Custom keyboard
Dependency
Install build tools (Archlinux)
sudo pacman -Syu base-devel cmake
sudo pacman -Sy arm-none-eabi-binutils arm-none-eabi-gcc arm-none-eabi-newlib
PICO SDK & TinyUSB
Add the PICO SDK as git submodules. And update the lib/tinyusb git submodule within it.
git submodule add https://github.com/raspberrypi/pico-sdk pico-sdk
cd pico-sdk
git submodule update --init