stellarskylark/skylark-qmk
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skylark-qmk/docs/getting_started_instroduction.md

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Introduction

This page attempts to explain the basic information you need to know to work with the QMK project. It assumes that you are familiar with navigating a UNIX shell, but does not assume you are familiar with C or with compiling using make.

Basic QMK structure

QMK is a fork of @tmk's tmk_keyboard project. The original TMK code, with modifications, can be found in the tmk folder. The QMK additions to the project may be found in the quantum folder. Keyboard projects may be found in the handwired and keyboard folders.

Keyboard project structure

Within the handwired and keyboard folders is a directory for each keyboard project, for example qmk_firmware/keyboards/clueboard. Within you'll find the following structure:

  • keymaps/: Different keymaps that can be built
  • rules.mk: The file that sets the default "make" options. Do not edit this file directly, instead use a keymap specific Makefile.
  • config.h: The file that sets the default compile time options. Do not edit this file directly, instead use a keymap specific config.h.

Keymap structure

In every keymap folder, the following files may be found. Only keymap.c is required, if the rest of the files are not found the default options will be chosen.

  • config.h: the options to configure your keymap
  • keymap.c: all of your keymap code, required
  • rules.mk: the features of QMK that are enabled
  • readme.md: a description of your keymap, how others might use it, and explanations of features. Please upload images to a service like imgur.

The config.h file

There are 2 config.h locations:

  • keyboard (/keyboards/<keyboard>/config.h)
  • keymap (/keyboards/<keyboard>/keymaps/<keymap>/config.h)

If the keymap config.h exists that file is included by the build system and the keyboard config.h is not included. If you wish to override settings in your keymap's config.h you will need to include some glue code:

#ifndef CONFIG_USER_H
#define CONFIG_USER_H

#include "../../config.h"

If you want to override a setting from the parent config.h file, you need to #undef and then #define the setting again, like this:

#undef MY_SETTING
#define MY_SETTING 4