wip

* [Keyboard] Add VIA support to Mysterium

* [Keyboard] Add VIA support to Discipad

.clang_complete

@@ -1,24 +0,0 @@
-
--I.
--I./drivers
--I./drivers/avr
--I./keyboards/ergodox_ez
--I./keyboards/ergodox_ez/keymaps/vim
--I./lib
--I./lib/lufa
--I./quantum
--I./quantum/api
--I./quantum/audio
--I./quantum/keymap_extras
--I./quantum/process_keycode
--I./quantum/serial_link
--I./quantum/template
--I./quantum/tools
--I./quantum/visualizer
--I./tmk_core
--I./tmk_core/common
--I./tmk_core/common/debug.h
--I./tmk_core/protocol
--I./tmk_core/protocol/lufa
--I./util
--DQMK_KEYBOARD=\"$(KEYBOARD)\" -DQMK_KEYMAP=\"$(KEYMAP)\"

.github/workflows/cli.yml

@@ -19,7 +19,7 @@ jobs:
     container: qmkfm/base_container
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
       with:
         submodules: recursive
     - name: Install dependencies

.gitignore

@@ -24,6 +24,7 @@ quantum/version.h
 .idea/
 CMakeLists.txt
 cmake-build-debug
+.clang_complete
 doxygen/
 .DS_Store
 /util/wsl_downloaded
@@ -47,7 +48,6 @@ doxygen/
 *.iml
 .browse.VC.db*
 *.stackdump
-util/Win_Check_Output.txt
 # Let these ones be user specific, since we have so many different configurations
 .vscode/c_cpp_properties.json
 .vscode/launch.json

.vscode/settings.json

@@ -9,13 +9,17 @@
         "**/*.bin": true
     },
     "files.associations": {
-      "*.h": "c",
-      "*.c": "c",
-      "*.inc": "c",
-      "*.cpp": "cpp",
-      "*.hpp": "cpp",
-      "xstddef": "c",
-      "type_traits": "c",
-      "utility": "c"
+        "*.h": "c",
+        "*.c": "c",
+        "*.inc": "c",
+        "*.cpp": "cpp",
+        "*.hpp": "cpp",
+        "xstddef": "c",
+        "type_traits": "c",
+        "utility": "c"
+    },
+    "[markdown]": {
+        "editor.trimAutoWhitespace": false,
+        "files.trimTrailingWhitespace": false
     }
 }

Makefile

@@ -557,55 +557,38 @@ endef
 # Let's match everything, we handle all the rule parsing ourselves
 .PHONY: %
 %:
-	# Check if we have the CMP tool installed
-	cmp $(ROOT_DIR)/Makefile $(ROOT_DIR)/Makefile >/dev/null 2>&1; if [ $$? -gt 0 ]; then printf "$(MSG_NO_CMP)"; exit 1; fi;
-	# Ensure that python3 is installed. This check can be removed after python is used in more places.
-	if ! python3 --version 1> /dev/null 2>&1; then printf "$(MSG_PYTHON_MISSING)"; fi
-	# Check if the submodules are dirty, and display a warning if they are
-ifndef SKIP_GIT
-	if [ ! -e lib/chibios ]; then git submodule sync lib/chibios && git submodule update --depth 50 --init lib/chibios; fi
-	if [ ! -e lib/chibios-contrib ]; then git submodule sync lib/chibios-contrib && git submodule update --depth 50 --init lib/chibios-contrib; fi
-	if [ ! -e lib/ugfx ]; then git submodule sync lib/ugfx && git submodule update --depth 50 --init lib/ugfx; fi
-	if [ ! -e lib/lufa ]; then git submodule sync lib/lufa && git submodule update --depth 50 --init lib/lufa; fi
-	git submodule status --recursive 2>/dev/null | \
-	while IFS= read -r x; do \
-		case "$$x" in \
-			\ *) ;; \
-			*) printf "$(MSG_SUBMODULE_DIRTY)";break;; \
-		esac \
-	done
-endif
-	rm -f $(ERROR_FILE) > /dev/null 2>&1
-	$(eval $(call PARSE_RULE,$@))
-	$(eval $(call SET_SILENT_MODE))
-	# Run all the commands in the same shell, notice the + at the first line
-	# it has to be there to allow parallel execution of the submake
-	# This always tries to compile everything, even if error occurs in the middle
-	# But we return the error code at the end, to trigger travis failures
-	# The sort at this point is to remove duplicates
-	$(foreach COMMAND,$(sort $(COMMANDS)),$(RUN_COMMAND))
-	if [ -f $(ERROR_FILE) ]; then printf "$(MSG_ERRORS)" & exit 1; fi;
-	$(foreach TEST,$(sort $(TESTS)),$(RUN_TEST))
-	if [ -f $(ERROR_FILE) ]; then printf "$(MSG_ERRORS)" & exit 1; fi;
+#	# Check if we have the CMP tool installed
+#	cmp $(ROOT_DIR)/Makefile $(ROOT_DIR)/Makefile >/dev/null 2>&1; if [ $$? -gt 0 ]; then printf "$(MSG_NO_CMP)"; exit 1; fi;
+#	# Ensure that python3 is installed. This check can be removed after python is used in more places.
+#	if ! python3 --version 1> /dev/null 2>&1; then printf "$(MSG_PYTHON_MISSING)"; fi
+#	# Check if the submodules are dirty, and display a warning if they are
+#ifndef SKIP_GIT
+#	if [ ! -e lib/chibios ]; then git submodule sync lib/chibios && git submodule update --depth 50 --init lib/chibios; fi
+#	if [ ! -e lib/chibios-contrib ]; then git submodule sync lib/chibios-contrib && git submodule update --depth 50 --init lib/chibios-contrib; fi
+#	if [ ! -e lib/ugfx ]; then git submodule sync lib/ugfx && git submodule update --depth 50 --init lib/ugfx; fi
+#	if [ ! -e lib/lufa ]; then git submodule sync lib/lufa && git submodule update --depth 50 --init lib/lufa; fi
+#	git submodule status --recursive 2>/dev/null | \
+#	while IFS= read -r x; do \
+#		case "$$x" in \
+#			\ *) ;; \
+#			*) printf "$(MSG_SUBMODULE_DIRTY)";break;; \
+#		esac \
+#	done
+#endif
+#	rm -f $(ERROR_FILE) > /dev/null 2>&1
+#	$(eval $(call PARSE_RULE,$@))
+#	$(eval $(call SET_SILENT_MODE))
+#	# Run all the commands in the same shell, notice the + at the first line
+#	# it has to be there to allow parallel execution of the submake
+#	# This always tries to compile everything, even if error occurs in the middle
+#	# But we return the error code at the end, to trigger travis failures
+#	# The sort at this point is to remove duplicates
+#	$(foreach COMMAND,$(sort $(COMMANDS)),$(RUN_COMMAND))
+#	if [ -f $(ERROR_FILE) ]; then printf "$(MSG_ERRORS)" & exit 1; fi;
+#	$(foreach TEST,$(sort $(TESTS)),$(RUN_TEST))
+#	if [ -f $(ERROR_FILE) ]; then printf "$(MSG_ERRORS)" & exit 1; fi;
 
-# These no longer work because of the colon system
-
-# All should compile everything
-# .PHONY: all
-# all: all-keyboards test-all
-
-# Define some shortcuts, mostly for compatibility with the old syntax
-# .PHONY: all-keyboards
-# all-keyboards: all\:all\:all
-
-# .PHONY: all-keyboards-defaults
-# all-keyboards-defaults: all\:default
-
-# .PHONY: test
-# test: test-all
-
-# .PHONY: test-clean
-# test-clean: test-all-clean
+	bin/qmk makehandler $@
 
 lib/%:
 	git submodule sync $?

bin/qmk

@@ -2,52 +2,61 @@
 """CLI wrapper for running QMK commands.
 """
 import os
-import subprocess
 import sys
 from importlib.util import find_spec
-from time import strftime
+from pathlib import Path
 
 # Add the QMK python libs to our path
-script_dir = os.path.dirname(os.path.realpath(__file__))
-qmk_dir = os.path.abspath(os.path.join(script_dir, '..'))
-python_lib_dir = os.path.abspath(os.path.join(qmk_dir, 'lib', 'python'))
-sys.path.append(python_lib_dir)
+script_dir = Path(os.path.realpath(__file__)).parent
+qmk_dir = script_dir.parent
+python_lib_dir = Path(qmk_dir / 'lib' / 'python').resolve()
+sys.path.append(str(python_lib_dir))
 
-# Make sure our modules have been setup
-with open(os.path.join(qmk_dir, 'requirements.txt'), 'r') as fd:
-    for line in fd.readlines():
-        line = line.strip().replace('<', '=').replace('>', '=')
 
-        if line[0] == '#':
-            continue
+def _check_modules(requirements):
+    """ Check if the modules in the given requirements.txt are available.
+    """
+    with Path(qmk_dir / requirements).open() as fd:
+        for line in fd.readlines():
+            line = line.strip().replace('<', '=').replace('>', '=')
 
-        if '#' in line:
-            line = line.split('#')[0]
+            if len(line) == 0 or line[0] == '#' or line.startswith('-r'):
+                continue
 
-        module = line.split('=')[0] if '=' in line else line
+            if '#' in line:
+                line = line.split('#')[0]
+
+            module = dict()
+            module['name'] = module['import'] = line.split('=')[0] if '=' in line else line
 
-        if module in ['pep8-naming']:
             # Not every module is importable by its own name.
-            continue
+            if module['name'] == "pep8-naming":
+                module['import'] = "pep8ext_naming"
 
-        if not find_spec(module):
-            print('Could not find module %s!' % module)
-            print('Please run `pip3 install -r requirements.txt` to install the python dependencies.')
-            exit(255)
+            if not find_spec(module['import']):
+                print('Could not find module %s!' % module['name'])
+                print('Please run `python3 -m pip install -r %s` to install required python dependencies.' % (qmk_dir / requirements,))
+                if developer:
+                    print('You can also turn off developer mode: qmk config user.developer=None')
+                print()
+                exit(255)
 
-# Figure out our version
-# TODO(skullydazed/anyone): Find a method that doesn't involve git. This is slow in docker and on windows.
-command = ['git', 'describe', '--abbrev=6', '--dirty', '--always', '--tags']
-result = subprocess.run(command, universal_newlines=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 
-if result.returncode == 0:
-    os.environ['QMK_VERSION'] = result.stdout.strip()
-else:
-    os.environ['QMK_VERSION'] = 'nogit-' + strftime('%Y-%m-%d-%H:%M:%S') + '-dirty'
+developer = False
+# Make sure our modules have been setup
+_check_modules('requirements.txt')
 
 # Setup the CLI
 import milc  # noqa
 
+# For developers additional modules are needed
+if milc.cli.config.user.developer:
+    # Do not run the check for 'config',
+    # so users can turn off developer mode
+    if len(sys.argv) == 1 or (len(sys.argv) > 1 and 'config' != sys.argv[1]):
+        developer = True
+        _check_modules('requirements-dev.txt')
+
 milc.EMOJI_LOGLEVELS['INFO'] = '{fg_blue}Ψ{style_reset_all}'
 
 

build_json.mk

@@ -21,6 +21,11 @@ else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_1)/keymap.json)","")
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_1)
 endif
 
+# Load the keymap-level rules.mk if exists
+ifneq ("$(wildcard $(KEYMAP_PATH))", "")
+    -include $(KEYMAP_PATH)/rules.mk
+endif
+
 # Generate the keymap.c
 $(KEYBOARD_OUTPUT)/src/keymap.c: $(KEYMAP_JSON)
 	bin/qmk json2c --quiet --output $(KEYMAP_C) $(KEYMAP_JSON)

docs/_summary.md

@@ -6,6 +6,7 @@
   * [Testing and Debugging](newbs_testing_debugging.md)
   * [Getting Help/Support](support.md)
   * [Other Resources](newbs_learn_more_resources.md)
+  * [Syllabus](syllabus.md)
 
 * FAQs
   * [General FAQ](faq_general.md)
@@ -121,6 +122,7 @@
     * [Drivers](hardware_drivers.md)
       * [ADC Driver](adc_driver.md)
       * [I2C Driver](i2c_driver.md)
+      * [SPI Driver](spi_driver.md)
       * [WS2812 Driver](ws2812_driver.md)
       * [EEPROM Driver](eeprom_driver.md)
     * [GPIO Controls](internals_gpio_control.md)
@@ -135,6 +137,10 @@
       * [Development Environment](api_development_environment.md)
       * [Architecture Overview](api_development_overview.md)
 
+  * Hardware Platform Development
+    * Arm/ChibiOS
+      * [Early initialization](platformdev_chibios_earlyinit.md)
+
   * QMK Reference
     * [Contributing to QMK](contributing.md)
     * [Translating the QMK Docs](translating.md)

docs/cli.md

@@ -6,7 +6,7 @@ The QMK CLI makes building and working with QMK keyboards easier. We have provid
 
 ### Requirements :id=requirements
 
-The CLI requires Python 3.5 or greater. We try to keep the number of requirements small but you will also need to install the packages listed in [`requirements.txt`](https://github.com/qmk/qmk_firmware/blob/master/requirements.txt). These are installed automatically when you install the QMK CLI.
+QMK requires Python 3.6 or greater. We try to keep the number of requirements small but you will also need to install the packages listed in [`requirements.txt`](https://github.com/qmk/qmk_firmware/blob/master/requirements.txt). These are installed automatically when you install the QMK CLI.
 
 ### Install Using Homebrew (macOS, some Linux) :id=install-using-homebrew
 
@@ -21,7 +21,7 @@ qmk setup  # This will clone `qmk/qmk_firmware` and optionally set up your build
 
 ### Install Using easy_install or pip :id=install-using-easy_install-or-pip
 
-If your system is not listed above you can install QMK manually. First ensure that you have python 3.5 (or later) installed and have installed pip. Then install QMK with this command:
+If your system is not listed above you can install QMK manually. First ensure that you have python 3.6 (or later) installed and have installed pip. Then install QMK with this command:
 
 ```
 pip3 install qmk

docs/cli_commands.md

@@ -1,38 +1,6 @@
 # QMK CLI Commands
 
-# CLI Commands
-
-## `qmk cformat`
-
-This command formats C code using clang-format. 
-
-Run it with no arguments to format all core code that has been changed. Default checks `origin/master` with `git diff`, branch can be changed using `-b <branch_name>`
-
-Run it with `-a` to format all core code, or pass filenames on the command line to run it on specific files.
-
-**Usage for specified files**:
-
-```
-qmk cformat [file1] [file2] [...] [fileN]
-```
-
-**Usage for all core files**:
-
-```
-qmk cformat -a
-```
-
-**Usage for only changed files against origin/master**:
-
-```
-qmk cformat
-```
-
-**Usage for only changed files against branch_name**:
-
-```
-qmk cformat -b branch_name
-```
+# User Commands
 
 ## `qmk compile`
 
@@ -136,16 +104,6 @@ This command lets you configure the behavior of QMK. For the full `qmk config` d
 qmk config [-ro] [config_token1] [config_token2] [...] [config_tokenN]
 ```
 
-## `qmk docs`
-
-This command starts a local HTTP server which you can use for browsing or improving the docs. Default port is 8936.
-
-**Usage**:
-
-```
-qmk docs [-p PORT]
-```
-
 ## `qmk doctor`
 
 This command examines your environment and alerts you to potential build or flash problems. It can fix many of them if you want it to.
@@ -180,28 +138,6 @@ Creates a keymap.c from a QMK Configurator export.
 qmk json2c [-o OUTPUT] filename
 ```
 
-## `qmk kle2json`
-
-This command allows you to convert from raw KLE data to QMK Configurator JSON. It accepts either an absolute file path, or a file name in the current directory. By default it will not overwrite `info.json` if it is already present. Use the `-f` or `--force` flag to overwrite.
-
-**Usage**:
-
-```
-qmk kle2json [-f] <filename>
-```
-
-**Examples**:
-
-```
-$ qmk kle2json kle.txt 
-☒ File info.json already exists, use -f or --force to overwrite.
-```
-
-```
-$ qmk kle2json -f kle.txt -f
-Ψ Wrote out to info.json
-```
-
 ## `qmk list-keyboards`
 
 This command lists all the keyboards currently defined in `qmk_firmware`
@@ -232,6 +168,74 @@ This command creates a new keymap based on a keyboard's existing default keymap.
 qmk new-keymap [-kb KEYBOARD] [-km KEYMAP]
 ```
 
+---
+
+# Developer Commands
+
+## `qmk cformat`
+
+This command formats C code using clang-format. 
+
+Run it with no arguments to format all core code that has been changed. Default checks `origin/master` with `git diff`, branch can be changed using `-b <branch_name>`
+
+Run it with `-a` to format all core code, or pass filenames on the command line to run it on specific files.
+
+**Usage for specified files**:
+
+```
+qmk cformat [file1] [file2] [...] [fileN]
+```
+
+**Usage for all core files**:
+
+```
+qmk cformat -a
+```
+
+**Usage for only changed files against origin/master**:
+
+```
+qmk cformat
+```
+
+**Usage for only changed files against branch_name**:
+
+```
+qmk cformat -b branch_name
+```
+
+## `qmk docs`
+
+This command starts a local HTTP server which you can use for browsing or improving the docs. Default port is 8936.
+
+**Usage**:
+
+```
+qmk docs [-p PORT]
+```
+
+## `qmk kle2json`
+
+This command allows you to convert from raw KLE data to QMK Configurator JSON. It accepts either an absolute file path, or a file name in the current directory. By default it will not overwrite `info.json` if it is already present. Use the `-f` or `--force` flag to overwrite.
+
+**Usage**:
+
+```
+qmk kle2json [-f] <filename>
+```
+
+**Examples**:
+
+```
+$ qmk kle2json kle.txt 
+☒ File info.json already exists, use -f or --force to overwrite.
+```
+
+```
+$ qmk kle2json -f kle.txt -f
+Ψ Wrote out to info.json
+```
+
 ## `qmk pyformat`
 
 This command formats python code in `qmk_firmware`.
@@ -251,3 +255,4 @@ This command runs the python test suite. If you make changes to python code you
 ```
 qmk pytest
 ```
+

docs/cli_development.md

@@ -6,6 +6,18 @@ This document has useful information for developers wishing to write new `qmk` s
 
 The QMK CLI operates using the subcommand pattern made famous by git. The main `qmk` script is simply there to setup the environment and pick the correct entrypoint to run. Each subcommand is a self-contained module with an entrypoint (decorated by `@cli.subcommand()`) that performs some action and returns a shell returncode, or None.
 
+## Developer mode:
+
+If you intend to maintain keyboards and/or contribute to QMK, you can enable the CLI's "Developer" mode:
+
+`qmk config user.developer=True`
+
+This will allow you to see all available subcommands.  
+**Note:** You will have to install additional requirements:  
+```bash
+python3 -m pip install -r requirements-dev.txt
+```
+
 # Subcommands
 
 [MILC](https://github.com/clueboard/milc) is the CLI framework `qmk` uses to handle argument parsing, configuration, logging, and many other features. It lets you focus on writing your tool without wasting your time writing glue code.
@@ -32,7 +44,7 @@ def hello(cli):
 
 First we import the `cli` object from `milc`. This is how we interact with the user and control the script's behavior. We use `@cli.argument()` to define a command line flag, `--name`. This also creates a configuration variable named `hello.name` (and the corresponding `user.name`) which the user can set so they don't have to specify the argument. The `cli.subcommand()` decorator designates this function as a subcommand. The name of the subcommand will be taken from the name of the function.
 
-Once inside our function we find a typical "Hello, World!" program. We use `cli.log` to access the underlying [Logger Object](https://docs.python.org/3.5/library/logging.html#logger-objects), whose behavior is user controllable. We also access the value for name supplied by the user as `cli.config.hello.name`. The value for `cli.config.hello.name` will be determined by looking at the `--name` argument supplied by the user, if not provided it will use the value in the `qmk.ini` config file, and if neither of those is provided it will fall back to the default supplied in the `cli.argument()` decorator.
+Once inside our function we find a typical "Hello, World!" program. We use `cli.log` to access the underlying [Logger Object](https://docs.python.org/3.6/library/logging.html#logger-objects), whose behavior is user controllable. We also access the value for name supplied by the user as `cli.config.hello.name`. The value for `cli.config.hello.name` will be determined by looking at the `--name` argument supplied by the user, if not provided it will use the value in the `qmk.ini` config file, and if neither of those is provided it will fall back to the default supplied in the `cli.argument()` decorator.
 
 # User Interaction
 
@@ -44,13 +56,13 @@ There are two main methods for outputting text in a subcommand- `cli.log` and `c
 
 You can use special tokens to colorize your text, to make it easier to understand the output of your program. See [Colorizing Text](#colorizing-text) below.
 
-Both of these methods support built-in string formatting using python's [printf style string format operations](https://docs.python.org/3.5/library/stdtypes.html#old-string-formatting). You can use tokens such as `%s` and `%d` within your text strings then pass the values as arguments. See our Hello, World program above for an example.
+Both of these methods support built-in string formatting using python's [printf style string format operations](https://docs.python.org/3.6/library/stdtypes.html#old-string-formatting). You can use tokens such as `%s` and `%d` within your text strings then pass the values as arguments. See our Hello, World program above for an example.
 
 You should never use the format operator (`%`) directly, always pass values as arguments.
 
 ### Logging (`cli.log`)
 
-The `cli.log` object gives you access to a [Logger Object](https://docs.python.org/3.5/library/logging.html#logger-objects). We have configured our log output to show the user a nice emoji for each log level (or the log level name if their terminal does not support unicode.) This way the user can tell at a glance which messages are most important when something goes wrong.
+The `cli.log` object gives you access to a [Logger Object](https://docs.python.org/3.6/library/logging.html#logger-objects). We have configured our log output to show the user a nice emoji for each log level (or the log level name if their terminal does not support unicode.) This way the user can tell at a glance which messages are most important when something goes wrong.
 
 The default log level is `INFO`. If the user runs `qmk -v <subcommand>` the default log level will be set to `DEBUG`.
 

docs/coding_conventions_c.md

@@ -20,11 +20,11 @@ Most of our style is pretty easy to pick up on, but right now it's not entirely
 * We accept both forms of preprocessor if's: `#ifdef DEFINED` and `#if defined(DEFINED)`
   * If you are not sure which to prefer use the `#if defined(DEFINED)` form.
   * Do not change existing code from one style to the other, except when moving to a multiple condition `#if`.
-  * Do not put whitespace between `#` and `if`.
-  * When deciding how (or if) to indent directives keep these points in mind:
-    * Readability is more important than consistency.
-    * Follow the file's existing style. If the file is mixed follow the style that makes sense for the section you are modifying.
-    * When choosing to indent you can follow the indention level of the surrounding C code, or preprocessor directives can have their own indent level. Choose the style that best communicates the intent of your code.
+* When deciding how (or if) to indent preprocessor directives, keep these points in mind:
+  * Readability is more important than consistency.
+  * Follow the file's existing style. If the file is mixed, follow the style that makes sense for the section you are modifying.
+  * When indenting, keep the hash at the start of the line and add whitespace between `#` and `if`, starting with 4 spaces after the `#`.
+  * You can follow the indention level of the surrounding C code, or preprocessor directives can have their own indentation levels. Choose the style that best communicates the intent of your code.
 
 Here is an example for easy reference:
 

docs/coding_conventions_python.md

@@ -2,7 +2,7 @@
 
 Most of our style follows PEP8 with some local modifications to make things less nit-picky. 
 
-* We target Python 3.5 for compatability with all supported platforms.
+* We target Python 3.6 for compatability with all supported platforms.
 * We indent using four (4) spaces (soft tabs)
 * We encourage liberal use of comments
   * Think of them as a story describing the feature
@@ -317,7 +317,7 @@ At the time of this writing our tests are not very comprehensive. Looking at the
 
 ## Integration Tests
 
-Integration tests can be found in `lib/python/qmk/tests/test_cli_commands.py`. This is where CLI commands are actually run and their overall behavior is verified. We use [`subprocess`](https://docs.python.org/3.5/library/subprocess.html#module-subprocess) to launch each CLI command and a combination of checking output and returncode to determine if the right thing happened.
+Integration tests can be found in `lib/python/qmk/tests/test_cli_commands.py`. This is where CLI commands are actually run and their overall behavior is verified. We use [`subprocess`](https://docs.python.org/3.6/library/subprocess.html#module-subprocess) to launch each CLI command and a combination of checking output and returncode to determine if the right thing happened.
 
 ## Unit Tests
 

docs/config_options.md

@@ -115,9 +115,9 @@ If you define these options you will disable the associated feature, which can s
 * `#define NO_ACTION_ONESHOT`
   * disable one-shot modifiers
 * `#define NO_ACTION_MACRO`
-  * disable old style macro handling: MACRO() & action_get_macro
+  * disable old-style macro handling using `MACRO()`, `action_get_macro()` _(deprecated)_
 * `#define NO_ACTION_FUNCTION`
-  * disable calling of action_function() from the fn_actions array (deprecated)
+  * disable old-style function handling using `fn_actions`, `action_function()` _(deprecated)_
 
 ## Features That Can Be Enabled
 
@@ -317,10 +317,10 @@ This is a [make](https://www.gnu.org/software/make/manual/make.html) file that i
 * `LAYOUTS`
   * A list of [layouts](feature_layouts.md) this keyboard supports.
 * `LINK_TIME_OPTIMIZATION_ENABLE`
-  * Enables Link Time Optimization (`LTO`) when compiling the keyboard.  This makes the process take longer, but can significantly reduce the compiled size (and since the firmware is small, the added time is not noticeable).  However, this will automatically disable the old Macros and Functions features automatically, as these break when `LTO` is enabled.
-  It does this by automatically defining `NO_ACTION_MACRO` and `NO_ACTION_FUNCTION`
+  * Enables Link Time Optimization (LTO) when compiling the keyboard.  This makes the process take longer, but it can significantly reduce the compiled size (and since the firmware is small, the added time is not noticeable).
+However, this will automatically disable the legacy TMK Macros and Functions features, as these break when LTO is enabled.  It does this by automatically defining `NO_ACTION_MACRO` and `NO_ACTION_FUNCTION`.  (Note: This does not affect QMK [Macros](feature_macros.md) and [Layers](feature_layers.md).)
 * `LTO_ENABLE`
-  * It has the same meaning as LINK_TIME_OPTIMIZATION_ENABLE.  You can use `LTO_ENABLE` instead of `LINK_TIME_OPTIMIZATION_ENABLE`.
+  * Has the same meaning as `LINK_TIME_OPTIMIZATION_ENABLE`.  You can use `LTO_ENABLE` instead of `LINK_TIME_OPTIMIZATION_ENABLE`.
 
 ## AVR MCU Options
 * `MCU = atmega32u4`

docs/de/_summary.md

@@ -98,6 +98,7 @@
   * [ISP Flashing Guide](de/isp_flashing_guide.md)
   * [ARM Debugging Guide](de/arm_debugging.md)
   * [I2C Driver](de/i2c_driver.md)
+  * [SPI Driver](de/spi_driver.md)
   * [GPIO Controls](de/internals_gpio_control.md)
   * [Proton C Conversion](de/proton_c_conversion.md)
 

docs/es/_summary.md

@@ -98,6 +98,7 @@
   * [Guía de flasheado de ISP](es/isp_flashing_guide.md)
   * [Guía de depuración de ARM](es/arm_debugging.md)
   * [Driver I2C](es/i2c_driver.md)
+  * [Driver SPI](es/spi_driver.md)
   * [Controles GPIO](es/internals_gpio_control.md)
   * [Conversión Proton C](es/proton_c_conversion.md)
 

docs/faq_debug.md

@@ -160,10 +160,3 @@ As of now root of its cause is not clear but some build options seem to be relat
 
 https://github.com/tmk/tmk_keyboard/issues/266
 https://geekhack.org/index.php?topic=41989.msg1967778#msg1967778
-
-
-
-## FLIP Doesn't Work
-### `AtLibUsbDfu.dll` Not Found
-Remove current driver and reinstall one FLIP provides from DeviceManager.
-http://imgur.com/a/bnwzy

docs/feature_advanced_keycodes.md

@@ -6,11 +6,11 @@ These allow you to combine a modifier with a keycode. When pressed, the keydown
 |----------|-------------------------------|----------------------------------------------------|
 |`LCTL(kc)`|`C(kc)`                        |Hold Left Control and press `kc`                    |
 |`LSFT(kc)`|`S(kc)`                        |Hold Left Shift and press `kc`                      |
-|`LALT(kc)`|`A(kc)`                        |Hold Left Alt and press `kc`                        |
+|`LALT(kc)`|`A(kc)`, `LOPT(kc)`            |Hold Left Alt and press `kc`                        |
 |`LGUI(kc)`|`G(kc)`, `LCMD(kc)`, `LWIN(kc)`|Hold Left GUI and press `kc`                        |
 |`RCTL(kc)`|                               |Hold Right Control and press `kc`                   |
 |`RSFT(kc)`|                               |Hold Right Shift and press `kc`                     |
-|`RALT(kc)`|`ALGR(kc)`                     |Hold Right Alt and press `kc`                       |
+|`RALT(kc)`|`ROPT(kc)`, `ALGR(kc)`         |Hold Right Alt and press `kc`                       |
 |`RGUI(kc)`|`RCMD(kc)`, `LWIN(kc)`         |Hold Right GUI and press `kc`                       |
 |`SGUI(kc)`|`SCMD(kc)`, `SWIN(kc)`         |Hold Left Shift and GUI and press `kc`              |
 |`LCA(kc)` |                               |Hold Left Control and Alt and press `kc`            |
@@ -18,7 +18,7 @@ These allow you to combine a modifier with a keycode. When pressed, the keydown
 |`MEH(kc)` |                               |Hold Left Control, Shift and Alt and press `kc`     |
 |`HYPR(kc)`|                               |Hold Left Control, Shift, Alt and GUI and press `kc`|
 
-You can also chain them, for example `LCTL(LALT(KC_DEL))` makes a key that sends Control+Alt+Delete with a single keypress.
+You can also chain them, for example `LCTL(LALT(KC_DEL))` or `C(A(KC_DEL))` makes a key that sends Control+Alt+Delete with a single keypress.
 
 # Legacy Content :id=legacy-content
 

docs/feature_debounce_type.md

@@ -38,5 +38,6 @@ For use in keyboards where refreshing ```NUM_KEYS``` 8-bit counters is computati
 appropriate for the ErgoDox models; the matrix is rotated 90°, and hence its "rows" are really columns, and each finger only hits a single "row" at a time in normal use.
 * eager_pk - debouncing per key. On any state change, response is immediate, followed by ```DEBOUNCE``` milliseconds of no further input for that key
 * sym_g - debouncing per keyboard. On any state change, a global timer is set. When ```DEBOUNCE``` milliseconds of no changes has occured, all input changes are pushed.
+* sym_pk - debouncing per key. On any state change, a per-key timer is set. When ```DEBOUNCE``` milliseconds of no changes have occured on that key, the key status change is pushed.
 
 

docs/feature_macros.md

@@ -161,11 +161,11 @@ There's also a couple of mod shortcuts you can use:
 
 * `SS_LCTL(string)`
 * `SS_LSFT(string)`
-* `SS_LALT(string)`
+* `SS_LALT(string)` or `SS_LOPT(string)`
 * `SS_LGUI(string)`, `SS_LCMD(string)` or `SS_LWIN(string)`
 * `SS_RCTL(string)`
 * `SS_RSFT(string)`
-* `SS_RALT(string)` or `SS_ALGR(string)`
+* `SS_RALT(string)`, `SS_ROPT(string)` or `SS_ALGR(string)`
 * `SS_RGUI(string)`, `SS_RCMD(string)` or `SS_RWIN(string)`
 
 These press the respective modifier, send the supplied string and then release the modifier.

docs/feature_ps2_mouse.md

@@ -266,6 +266,25 @@ To reverse the scroll axes you can put:
 
 into config.h.
 
+### Rotate Mouse Axes :id=rotate-mouse-axes
+
+Transform the output of the device with a clockwise rotation of 90, 180, or 270
+degrees.
+
+When compensating for device orientation, rotate the output the same amount in
+the opposite direction.  E.g. if the normal device orientation is considered to
+be North-facing, compensate as follows:
+
+```c
+#define PS2_MOUSE_ROTATE 270 /* Compensate for East-facing device orientation. */
+```
+```c
+#define PS2_MOUSE_ROTATE 180 /* Compensate for South-facing device orientation. */
+```
+```c
+#define PS2_MOUSE_ROTATE 90 /* Compensate for West-facing device orientation. */
+```
+
 ### Debug Settings :id=debug-settings
 
 To debug the mouse, add `debug_mouse = true` or enable via bootmagic.

docs/feature_rgb_matrix.md

@@ -396,18 +396,88 @@ The EEPROM for it is currently shared with the RGBLIGHT system (it's generally a
 
 Where `28` is an unused index from `eeconfig.h`.
 
-## Suspended state :id=suspended-state
+## Functions :id=functions
 
-To use the suspend feature, add this to your `<keyboard>.c`:
+### Direct Operation :id=direct-operation
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`rgb_matrix_set_color_all(r, g, b)`         |Set all of the LEDs to the given RGB value, where `r`/`g`/`b` are between 0 and 255 (not written to EEPROM) |
+|`rgb_matrix_set_color(index, r, g, b)`      |Set a single LED to the given RGB value, where `r`/`g`/`b` are between 0 and 255, and `index` is between 0 and `DRIVER_LED_TOTAL` (not written to EEPROM) |
+
+### Disable/Enable Effects :id=disable-enable-effects
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`rgb_matrix_toggle()`                       |Toggle effect range LEDs between on and off |
+|`rgb_matrix_toggle_noeeprom()`              |Toggle effect range LEDs between on and off (not written to EEPROM) |
+|`rgb_matrix_enable()`                       |Turn effect range LEDs on, based on their previous state |
+|`rgb_matrix_enable_noeeprom()`              |Turn effect range LEDs on, based on their previous state (not written to EEPROM) |
+|`rgb_matrix_disable()`                      |Turn effect range LEDs off |
+|`rgb_matrix_disable_noeeprom()`             |Turn effect range LEDs off (not written to EEPROM) |
+
+### Change Effect Mode :id=change-effect-mode
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`rgb_matrix_mode(mode)`                     |Set the mode, if RGB animations are enabled |
+|`rgb_matrix_mode_noeeprom(mode)`            |Set the mode, if RGB animations are enabled (not written to EEPROM) |
+|`rgb_matrix_step()`                         |Change the mode to the next RGB animation in the list of enabled RGB animations |
+|`rgb_matrix_step_reverse()`                 |Change the mode to the previous RGB animation in the list of enabled RGB animations |
+|`rgb_matrix_increase_speed()`               |Increases the speed of the animations |
+|`rgb_matrix_decrease_speed()`               |Decreases the speed of the animations |
+
+### Change Color :id=change-color
+|Function                                    |Description  |
+|--------------------------------------------|-------------|
+|`rgb_matrix_increase_hue()`                 |Increase the hue for effect range LEDs. This wraps around at maximum hue |
+|`rgb_matrix_decrease_hue()`                 |Decrease the hue for effect range LEDs. This wraps around at minimum hue |
+|`rgb_matrix_increase_sat()`                 |Increase the saturation for effect range LEDs. This wraps around at maximum saturation |
+|`rgb_matrix_decrease_sat()`                 |Decrease the saturation for effect range LEDs. This wraps around at minimum saturation |
+|`rgb_matrix_increase_val()`                 |Increase the value for effect range LEDs. This wraps around at maximum value |
+|`rgb_matrix_decrease_val()`                 |Decrease the value for effect range LEDs. This wraps around at minimum value |
+|`rgb_matrix_sethsv(h, s, v)`                |Set LEDs to the given HSV value where `h`/`s`/`v` are between 0 and 255 |
+|`rgb_matrix_sethsv_noeeprom(h, s, v)`       |Set LEDs to the given HSV value where `h`/`s`/`v` are between 0 and 255 (not written to EEPROM) |
+
+### Query Current Status :id=query-current-status
+|Function               |Description      |
+|-----------------------|-----------------|
+|`rgb_matrix_get_mode()`  |Get current mode |
+|`rgb_matrix_get_hue()`   |Get current hue  |
+|`rgb_matrix_get_sat()`   |Get current sat  |
+|`rgb_matrix_get_val()`   |Get current val  |
+
+## Callbacks :id=callbacks
+
+### Indicators :id=indicators
+
+If you want to set custom indicators, such as an LED for Caps Lock, or layer indication, you can use the `rgb_matrix_indicators_kb` or `rgb_matrix_indicators_user` function for that: 
+```c
+void rgb_matrix_indicators_kb(void) {
+    rgb_matrix_set_color(index, red, green, blue);
+}
+```
+
+### Suspended state :id=suspended-state
+To use the suspend feature, make sure that `#define RGB_DISABLE_WHEN_USB_SUSPENDED true` is added to the `config.h` file. 
+
+Additionally add this to your `<keyboard>.c`:
 
 ```c
-void suspend_power_down_kb(void)
-{
+void suspend_power_down_kb(void) {
+    rgb_matrix_set_suspend_state(true);
+    suspend_power_down_user();
+}
+
+void suspend_wakeup_init_kb(void) {
+    rgb_matrix_set_suspend_state(false);
+    suspend_wakeup_init_user();
+}
+```
+or add this to your `keymap.c`:
+```c
+void suspend_power_down_user(void) {
     rgb_matrix_set_suspend_state(true);
 }
 
-void suspend_wakeup_init_kb(void)
-{
+void suspend_wakeup_init_user(void) {
     rgb_matrix_set_suspend_state(false);
 }
 ```

docs/feature_unicode.md

@@ -90,13 +90,15 @@ Unicode input in QMK works by inputting a sequence of characters to the OS, sort
 
 The following input modes are available:
 
-* **`UC_OSX`**: macOS built-in Unicode hex input. Supports code points up to `0xFFFF` (`0x10FFFF` with Unicode Map).
+* **`UC_MAC`**: macOS built-in Unicode hex input. Supports code points up to `0xFFFF` (`0x10FFFF` with Unicode Map).
 
   To enable, go to _System Preferences > Keyboard > Input Sources_, add _Unicode Hex Input_ to the list (it's under _Other_), then activate it from the input dropdown in the Menu Bar.
-  By default, this mode uses the left Option key (`KC_LALT`) for Unicode input, but this can be changed by defining [`UNICODE_KEY_OSX`](#input-key-configuration) with another keycode.
+  By default, this mode uses the left Option key (`KC_LALT`) for Unicode input, but this can be changed by defining [`UNICODE_KEY_MAC`](#input-key-configuration) with another keycode.
 
   !> Using the _Unicode Hex Input_ input source may disable some Option based shortcuts, such as Option + Left Arrow and Option + Right Arrow.
 
+  !> `UC_OSX` is a deprecated alias of `UC_MAC` that will be removed in a future version of QMK.
+
 * **`UC_LNX`**: Linux built-in IBus Unicode input. Supports code points up to `0x10FFFF` (all possible code points).
 
   Enabled by default and works almost anywhere on IBus-enabled distros. Without IBus, this mode works under GTK apps, but rarely anywhere else.
@@ -124,7 +126,7 @@ You can switch the input mode at any time by using one of the following keycodes
 |----------------------|---------|------------|--------------------------------------------------------------|
 |`UNICODE_MODE_FORWARD`|`UC_MOD` |Next in list|[Cycle](#input-mode-cycling) through selected modes           |
 |`UNICODE_MODE_REVERSE`|`UC_RMOD`|Prev in list|[Cycle](#input-mode-cycling) through selected modes in reverse|
-|`UNICODE_MODE_OSX`    |`UC_M_OS`|`UC_OSX`    |Switch to macOS input                                         |
+|`UNICODE_MODE_MAC`    |`UC_M_MA`|`UC_MAC`    |Switch to macOS input                                         |
 |`UNICODE_MODE_LNX`    |`UC_M_LN`|`UC_LNX`    |Switch to Linux input                                         |
 |`UNICODE_MODE_WIN`    |`UC_M_WI`|`UC_WIN`    |Switch to Windows input                                       |
 |`UNICODE_MODE_BSD`    |`UC_M_BS`|`UC_BSD`    |Switch to BSD input (not implemented)                         |
@@ -145,9 +147,9 @@ If you have the [Audio feature](feature_audio.md) enabled on the board, you can
 For instance, you can add these definitions to your `config.h` file:
 
 ```c
-#define UNICODE_SONG_OSX  COIN_SOUND
+#define UNICODE_SONG_MAC  AUDIO_ON_SOUND
 #define UNICODE_SONG_LNX  UNICODE_LINUX
-#define UNICODE_SONG_BSD  MARIO_GAMEOVER
+#define UNICODE_SONG_BSD  TERMINAL_SOUND
 #define UNICODE_SONG_WIN  UNICODE_WINDOWS
 #define UNICODE_SONG_WINC UNICODE_WINDOWS
 ```
@@ -171,7 +173,7 @@ You can customize the keys used to trigger Unicode input for macOS, Linux and Wi
 
 |Define            |Type      |Default           |Example                                    |
 |------------------|----------|------------------|-------------------------------------------|
-|`UNICODE_KEY_OSX` |`uint8_t` |`KC_LALT`         |`#define UNICODE_KEY_OSX  KC_RALT`         |
+|`UNICODE_KEY_MAC` |`uint8_t` |`KC_LALT`         |`#define UNICODE_KEY_MAC  KC_RALT`         |
 |`UNICODE_KEY_LNX` |`uint16_t`|`LCTL(LSFT(KC_U))`|`#define UNICODE_KEY_LNX  LCTL(LSFT(KC_E))`|
 |`UNICODE_KEY_WINC`|`uint8_t` |`KC_RALT`         |`#define UNICODE_KEY_WINC KC_RGUI`         |
 
@@ -180,7 +182,7 @@ You can customize the keys used to trigger Unicode input for macOS, Linux and Wi
 You can choose which input modes are available for cycling through. By default, this is disabled. If you want to enable it, limiting it to just the modes you use makes sense. Note that the values in the list are comma-delimited.
 
 ```c
-#define UNICODE_SELECTED_MODES UC_OSX, UC_LNX, UC_WIN, UC_WINC
+#define UNICODE_SELECTED_MODES UC_MAC, UC_LNX, UC_WIN, UC_WINC
 ```
 
 You can cycle through the selected modes by using the `UC_MOD`/`UC_RMOD` keycodes, or by calling `cycle_unicode_input_mode(offset)` in your code (`offset` is how many modes to move forward by, so +1 corresponds to `UC_MOD`).

docs/flashing.md

@@ -26,7 +26,6 @@ Compatible flashers:
 
 * [QMK Toolbox](https://github.com/qmk/qmk_toolbox/releases) (recommended GUI)
 * [dfu-programmer](https://github.com/dfu-programmer/dfu-programmer) / `:dfu` in QMK (recommended command line)
-* [Atmel's Flip](http://www.microchip.com/developmenttools/productdetails.aspx?partno=flip) (not recommended)
 
 Flashing sequence:
 

docs/fr-fr/_summary.md

@@ -101,7 +101,8 @@
   * [Guide des claviers soudés à la main](fr-fr/hand_wire.md)
   * [Guide de flash de l’ISP](fr-fr/isp_flashing_guide.md)
   * [Guide du débogage ARM](fr-fr/arm_debugging.md)
-  * [Drivers i2c](fr-fr/i2c_driver.md)
+  * [Drivers I2C](fr-fr/i2c_driver.md)
+  * [Drivers SPI](fr-fr/spi_driver.md)
   * [Contrôles des GPIO](fr-fr/internals_gpio_control.md)
   * [Conversion en Proton C](fr-fr/proton_c_conversion.md)
 

docs/fr-fr/faq_debug.md

@@ -155,11 +155,3 @@ Pour le moment, l'origine du problème n'est pas comprise, mais certaines option
 
 https://github.com/tmk/tmk_keyboard/issues/266
 https://geekhack.org/index.php?topic=41989.msg1967778#msg1967778
-
-## FLIP ne marche pas
-
-### `AtLibUsbDfu.dll` Not Found
-
-Supprimez le pilote actuel et réinstallez celui donné par FLIP dans le gestionnaire de périphériques.
-
-http://imgur.com/a/bnwzy

docs/fr-fr/flashing.md

@@ -26,7 +26,6 @@ Méthodes de flash compatibles :
 
 * [QMK Toolbox](https://github.com/qmk/qmk_toolbox/releases) (interface graphique recommandé)
 * [dfu-programmer](https://github.com/dfu-programmer/dfu-programmer) / `:dfu` avec QMK (outil en ligne de commande recommandé)
-* [Atmel's Flip](http://www.microchip.com/developmenttools/productdetails.aspx?partno=flip) (non recommandé)
 
 Ordre des actions :
 

docs/getting_started_vagrant.md

@@ -20,7 +20,6 @@ The "easy" way to flash the firmware is using a tool from your host OS:
 
 * [QMK Toolbox](https://github.com/qmk/qmk_toolbox) (recommended)
 * [Teensy Loader](https://www.pjrc.com/teensy/loader.html)
-* [Atmel FLIP](http://www.atmel.com/tools/flip.aspx)
 
 If you want to program via the command line you can uncomment the ['modifyvm'] lines in the Vagrantfile to enable the USB passthrough into Linux and then program using the command line tools like dfu-util/dfu-programmer or you can install the Teensy CLI version.
 

docs/hardware_keyboard_guidelines.md

@@ -61,10 +61,76 @@ This file is used by the [QMK API](https://github.com/qmk/qmk_api). It contains
 
 All projects need to have a `config.h` file that sets things like the matrix size, product name, USB VID/PID, description and other settings. In general, use this file to set essential information and defaults for your keyboard that will always work.
 
+The `config.h` files can also be placed in sub-folders, and the order in which they are read is as follows:
+
+* `keyboards/top_folder/config.h`
+  * `keyboards/top_folder/sub_1/config.h`
+    * `keyboards/top_folder/sub_1/sub_2/config.h`
+      * `keyboards/top_folder/sub_1/sub_2/sub_3/config.h`
+        * `keyboards/top_folder/sub_1/sub_2/sub_3/sub_4/config.h`
+          * `users/a_user_folder/config.h`
+          * `keyboards/top_folder/keymaps/a_keymap/config.h`
+        * `keyboards/top_folder/sub_1/sub_2/sub_3/sub_4/post_config.h`
+      * `keyboards/top_folder/sub_1/sub_2/sub_3/post_config.h`
+    * `keyboards/top_folder/sub_1/sub_2/post_config.h`
+  * `keyboards/top_folder/sub_1/post_config.h`
+* `keyboards/top_folder/post_config.h`
+
+The `post_config.h` file can be used for additional post-processing, depending on what is specified in the `config.h` file. For example, if you define the `IOS_DEVICE_ENABLE` macro in your keymap-level `config.h` file as follows, you can configure more detailed settings accordingly in the `post_config.h` file:
+
+* `keyboards/top_folder/keymaps/a_keymap/config.h`
+  ```c
+  #define IOS_DEVICE_ENABLE
+  ```
+* `keyboards/top_folder/post_config.h`
+  ```c
+  #ifndef IOS_DEVICE_ENABLE
+    // USB_MAX_POWER_CONSUMPTION value for this keyboard
+    #define USB_MAX_POWER_CONSUMPTION 400
+  #else
+    // fix iPhone and iPad power adapter issue
+    // iOS device need lessthan 100
+    #define USB_MAX_POWER_CONSUMPTION 100
+  #endif
+  
+  #ifdef RGBLIGHT_ENABLE
+    #ifndef IOS_DEVICE_ENABLE
+      #define RGBLIGHT_LIMIT_VAL 200
+      #define RGBLIGHT_VAL_STEP 17
+    #else
+      #define RGBLIGHT_LIMIT_VAL 35
+      #define RGBLIGHT_VAL_STEP 4
+    #endif
+    #ifndef RGBLIGHT_HUE_STEP
+      #define RGBLIGHT_HUE_STEP 10
+    #endif
+    #ifndef RGBLIGHT_SAT_STEP
+      #define RGBLIGHT_SAT_STEP 17
+    #endif
+  #endif
+  ```
+
+?> If you define options using `post_config.h` as in the above example, you should not define the same options in the keyboard- or user-level `config.h`.
+
 ### `rules.mk`
 
 The presence of this file means that the folder is a keyboard target and can be used in `make` commands. This is where you setup the build environment for your keyboard and configure the default set of features.
 
+The `rules.mk` file can also be placed in a sub-folder, and its reading order is as follows:
+
+* `keyboards/top_folder/rules.mk`
+  * `keyboards/top_folder/sub_1/rules.mk`
+    * `keyboards/top_folder/sub_1/sub_2/rules.mk`
+      * `keyboards/top_folder/sub_1/sub_2/sub_3/rules.mk`
+        * `keyboards/top_folder/sub_1/sub_2/sub_3/sub_4/rules.mk`
+          * `keyboards/top_folder/keymaps/a_keymap/rules.mk`
+          * `users/a_user_folder/rules.mk`
+* `common_features.mk`
+
+Many of the settings written in the `rules.mk` file are interpreted by `common_features.mk`, which sets the necessary source files and compiler options.
+
+?> See `build_keyboard.mk` and `common_features.mk` for more details.
+
 ### `<keyboard_name.c>`
 
 This is where you will write custom code for your keyboard. Typically you will write code to initialize and interface with the hardware in your keyboard. If your keyboard consists of only a key matrix with no LEDs, speakers, or other auxiliary hardware this file can be blank.