The pinout of the Atmega can be found here.
git clone https://gitlab.com/coliss86/soumarin
git clone -b 0.17.5 https://github.com/qmk/qmk_firmware
cd qmk_firmware/keyboards
ln -s ../../sousmarin/qmk sousmarin
To update qmk_firmware
cd qmk_firmware
git fetch -a
git checkout <new_tag>
Compile:
qmk compile -kb sousmarin -km default
Flashing this keyboard:
qmk flash -kb sousmarin -km default
See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.