Use nano specs (#8270)

* Enable syscalls all the time

* fix whitespace

.github/ISSUE_TEMPLATE/blank.md

@@ -1,5 +1,11 @@
 ---
 name: Blank issue
-about: If you're 100% sure that you don't need one of the other issue templates, use this one instead. 
+about: If you're 100% sure that you don't need one of the other issue templates, use
+  this one instead.
+title: ''
+labels: help wanted, question
+assignees: ''
 
 ---
+
+

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,7 +1,12 @@
 ---
 name: Bug report
-about: Create a report to help us improve the QMK Firmware
+about: Create a report to help us improve QMK Firmware.
+title: "[Bug] "
+labels: bug, help wanted
+assignees: ''
+
 ---
+
 <!-- Provide a general summary of the bug in the title above. -->
 
 <!--- This template is entirely optional and can be removed, but is here to help both you and us. -->

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: QMK Discord
+    url: https://discord.gg/Uq7gcHh
+    about: Ask questions, discuss issues and features. Chill.
+  - name: OLKB Subreddit
+    url: https://www.reddit.com/r/olkb
+    about: All things OLKB and QMK.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,7 +1,12 @@
 ---
 name: Feature request
-about: Suggest a new feature or changes to existing features 
+about: Suggest a new feature or changes to existing features.
+title: "[Feature Request] "
+labels: enhancement, help wanted
+assignees: ''
+
 ---
+
 <!--- Provide a general summary of the changes you want in the title above. -->
 
 <!--- This template is entirely optional and can be removed, but is here to help both you and us. -->

.github/ISSUE_TEMPLATE/other_issues.md

@@ -1,7 +1,12 @@
 ---
 name: Other issues
-about: Anything else that doesn't fall into the above categories. 
+about: Anything else that doesn't fall into the above categories.
+title: ''
+labels: help wanted, question
+assignees: ''
+
 ---
+
 <!--- Provide a general summary of the changes you want in the title above. -->
 
 <!--- Anything on lines wrapped in comments like these will not show up in the final text. -->

.github/stale.yml

@@ -0,0 +1,58 @@
+# Configuration for probot-stale - https://github.com/probot/stale
+
+# General configuration
+
+# Pull request specific configuration
+pulls:
+  staleLabel: awaiting changes
+  # Number of days of inactivity before an Issue or Pull Request becomes stale
+  daysUntilStale: 45
+  # Number of days of inactivity before a stale Issue or Pull Request is closed.
+  # Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
+  daysUntilClose: 30
+  # Comment to post when marking as stale. Set to `false` to disable
+  markComment: >
+    Thank you for your contribution!
+
+    This pull request has been automatically marked as stale because it has not had
+    activity in the last 45 days. It will be closed in 30 days if no further activity occurs.
+    Please feel free to give a status update now, or re-open when it's ready.
+    
+    For maintainers: Please label with `awaiting review`, `breaking_change`, `in progress`, or `on hold` to prevent 
+    the issue from being re-flagged.
+  # Comment to post when closing a stale Issue or Pull Request.
+  closeComment: >
+    Thank you for your contribution!
+
+    This pull request has been automatically closed because it has not had activity in the last 30 days.
+    Please feel free to give a status update now, ping for review, or re-open when it's ready.
+  # Limit the number of actions per hour, from 1-30. Default is 30
+  limitPerRun: 30
+  exemptLabels:
+    - awaiting review
+    - breaking_change
+    - in progress
+    - on hold
+
+# Issue specific configuration
+issues:
+  staleLabel: stale
+  limitPerRun: 10
+  daysUntilStale: 90
+  daysUntilClose: 30
+  markComment: >
+    This issue has been automatically marked as stale because it has not had activity in the
+    last 90 days. It will be closed in the next 30 days unless it is tagged properly or other activity
+    occurs.
+    
+    For maintainers: Please label with `bug`, `in progress`, `on hold`, `discussion` or `to do` to prevent 
+    the issue from being re-flagged.
+  closeComment: >
+    This issue has been automatically closed because it has not had activity in the last 30 days.
+    If this issue is still valid, re-open the issue and let us know.
+  exemptLabels:
+    - bug
+    - in progress
+    - on hold
+    - discussion
+    - to do

.github/workflows/cli.yml

@@ -0,0 +1,28 @@
+name: CLI CI
+
+on:
+  push:
+    branches:
+    - master
+    - future
+  pull_request:
+    paths:
+    - 'lib/python/**'
+    - 'bin/qmk'
+    - 'requirements.txt'
+    - '.github/workflows/cli.yml'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    container: qmkfm/base_container
+
+    steps:
+    - uses: actions/checkout@v1
+      with:
+        submodules: recursive
+    - name: Install dependencies
+      run: pip3 install -r requirements.txt
+    - name: Run tests
+      run: bin/qmk pytest

.gitignore

@@ -63,9 +63,6 @@ util/Win_Check_Output.txt
 *.gif
 *.jpg
 
-# Do not ignore MiniDox left/right hand eeprom files
-!keyboards/minidox/*.eep
-
 # things travis sees
 secrets.tar
 id_rsa_*
@@ -73,3 +70,6 @@ id_rsa_*
 
 # python things
 __pycache__
+
+# prerequisites for updating ChibiOS
+/util/fmpp*

.gitmodules

@@ -4,7 +4,6 @@
 [submodule "lib/chibios-contrib"]
 	path = lib/chibios-contrib
 	url = https://github.com/qmk/ChibiOS-Contrib
-	branch = k-type-fix
 [submodule "lib/ugfx"]
 	path = lib/ugfx
 	url = https://github.com/qmk/uGFX

.travis.yml

@@ -12,20 +12,26 @@ env:
   - MAKEFLAGS="-j3 --output-sync"
 services:
   - docker
-install:
-  - npm install -g moxygen
-script:
-  - git rev-parse --short HEAD
-  - bash util/travis_test.sh
-  - bash util/travis_build.sh
-  - bash util/travis_docs.sh
 addons:
   apt:
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-trusty-7
     packages:
     - pandoc
     - diffutils
     - dos2unix
     - doxygen
+    - clang-format-7
+    - libstdc++-7-dev
+install:
+  - npm install -g moxygen
+script:
+  - git rev-parse --short HEAD
+  - git diff --name-only HEAD $TRAVIS_BRANCH
+  - bash util/travis_test.sh
+  - bash util/travis_build.sh
+  - bash util/travis_docs.sh
 after_script:
   bash util/travis_compiled_push.sh
 notifications:

.vscode/settings.json

@@ -5,7 +5,8 @@
     // Configure glob patterns for excluding files and folders.
     "files.exclude": {
         "**/.build": true,
-        "**/*.hex": true
+        "**/*.hex": true,
+        "**/*.bin": true
     },
     "files.associations": {
       "*.h": "c",

Makefile

@@ -272,12 +272,14 @@ define PARSE_RULE
     # If the rule starts with all, then continue the parsing from
     # PARSE_ALL_KEYBOARDS
     ifeq ($$(call COMPARE_AND_REMOVE_FROM_RULE,all),true)
+        KEYBOARD_RULE=all
         $$(eval $$(call PARSE_ALL_KEYBOARDS))
     else ifeq ($$(call COMPARE_AND_REMOVE_FROM_RULE,test),true)
         $$(eval $$(call PARSE_TEST))
     # If the rule starts with the name of a known keyboard, then continue
     # the parsing from PARSE_KEYBOARD
     else ifeq ($$(call TRY_TO_MATCH_RULE_FROM_LIST,$$(KEYBOARDS)),true)
+        KEYBOARD_RULE=$$(MATCHED_ITEM)
         $$(eval $$(call PARSE_KEYBOARD,$$(MATCHED_ITEM)))
     # Otherwise use the KEYBOARD variable, which is determined either by
     # the current directory you run make from, or passed in as an argument
@@ -380,6 +382,9 @@ define PARSE_KEYBOARD
     # Otherwise try to match the keymap from the current folder, or arguments to the make command
     else ifneq ($$(KEYMAP),)
         $$(eval $$(call PARSE_KEYMAP,$$(KEYMAP)))
+    # Otherwise if we are running make all:<user> just skip
+    else ifeq ($$(KEYBOARD_RULE),all)
+        # $$(info Skipping: No user keymap for $$(CURRENT_KB))
     # Otherwise, make all keymaps, again this is consistent with how it works without
     # any arguments
     else
@@ -558,10 +563,10 @@ endef
 	if ! python3 --version 1> /dev/null 2>&1; then printf "$(MSG_PYTHON_MISSING)"; fi
 	# Check if the submodules are dirty, and display a warning if they are
 ifndef SKIP_GIT
-	if [ ! -e lib/chibios ]; then git submodule sync lib/chibios && git submodule update --depth 1 --init lib/chibios; fi
-	if [ ! -e lib/chibios-contrib ]; then git submodule sync lib/chibios-contrib && git submodule update --depth 1 --init lib/chibios-contrib; fi
-	if [ ! -e lib/ugfx ]; then git submodule sync lib/ugfx && git submodule update --depth 1 --init lib/ugfx; fi
-	if [ ! -e lib/lufa ]; then git submodule sync lib/lufa && git submodule update --depth 1 --init lib/lufa; fi
+	if [ ! -e lib/chibios ]; then git submodule sync lib/chibios && git submodule update --depth 50 --init lib/chibios; fi
+	if [ ! -e lib/chibios-contrib ]; then git submodule sync lib/chibios-contrib && git submodule update --depth 50 --init lib/chibios-contrib; fi
+	if [ ! -e lib/ugfx ]; then git submodule sync lib/ugfx && git submodule update --depth 50 --init lib/ugfx; fi
+	if [ ! -e lib/lufa ]; then git submodule sync lib/lufa && git submodule update --depth 50 --init lib/lufa; fi
 	git submodule status --recursive 2>/dev/null | \
 	while IFS= read -r x; do \
 		case "$$x" in \
@@ -618,13 +623,19 @@ endif
 # Generate the version.h file
 ifndef SKIP_GIT
     GIT_VERSION := $(shell git describe --abbrev=6 --dirty --always --tags 2>/dev/null || date +"%Y-%m-%d-%H:%M:%S")
+    CHIBIOS_VERSION := $(shell cd lib/chibios && git describe --abbrev=6 --dirty --always --tags 2>/dev/null || date +"%Y-%m-%d-%H:%M:%S")
+    CHIBIOS_CONTRIB_VERSION := $(shell cd lib/chibios-contrib && git describe --abbrev=6 --dirty --always --tags 2>/dev/null || date +"%Y-%m-%d-%H:%M:%S")
 else
     GIT_VERSION := NA
+    CHIBIOS_VERSION := NA
+    CHIBIOS_CONTRIB_VERSION := NA
 endif
 ifndef SKIP_VERSION
 BUILD_DATE := $(shell date +"%Y-%m-%d-%H:%M:%S")
 $(shell echo '#define QMK_VERSION "$(GIT_VERSION)"' > $(ROOT_DIR)/quantum/version.h)
 $(shell echo '#define QMK_BUILDDATE "$(BUILD_DATE)"' >> $(ROOT_DIR)/quantum/version.h)
+$(shell echo '#define CHIBIOS_VERSION "$(CHIBIOS_VERSION)"' >> $(ROOT_DIR)/quantum/version.h)
+$(shell echo '#define CHIBIOS_CONTRIB_VERSION "$(CHIBIOS_CONTRIB_VERSION)"' >> $(ROOT_DIR)/quantum/version.h)
 else
 BUILD_DATE := NA
 endif

bin/qmk

@@ -25,6 +25,11 @@ with open(os.path.join(qmk_dir, 'requirements.txt'), 'r') as fd:
             line = line.split('#')[0]
 
         module = line.split('=')[0] if '=' in line else line
+
+        if module in ['pep8-naming']:
+            # Not every module is importable by its own name.
+            continue
+
         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.')
@@ -41,7 +46,7 @@ else:
     os.environ['QMK_VERSION'] = 'nogit-' + strftime('%Y-%m-%d-%H:%M:%S') + '-dirty'
 
 # Setup the CLI
-import milc
+import milc  # noqa
 
 milc.EMOJI_LOGLEVELS['INFO'] = '{fg_blue}Ψ{style_reset_all}'
 
@@ -61,7 +66,7 @@ def main():
     os.chdir(qmk_dir)
 
     # Import the subcommands
-    import qmk.cli
+    import qmk.cli  # noqa
 
     # Execute
     return_code = milc.cli()

bootloader.mk

@@ -82,6 +82,13 @@ ifeq ($(strip $(BOOTLOADER)), USBasp)
     OPT_DEFS += -DBOOTLOADER_USBASP
     BOOTLOADER_SIZE = 4096
 endif
+ifeq ($(strip $(BOOTLOADER)), lufa-ms)
+    # DO NOT USE THIS BOOTLOADER IN NEW PROJECTS!
+    # It is extremely prone to bricking, and is only included to support existing boards.
+    OPT_DEFS += -DBOOTLOADER_MS
+    BOOTLOADER_SIZE = 6144
+    FIRMWARE_FORMAT = bin
+endif
 
 ifdef BOOTLOADER_SIZE
     OPT_DEFS += -DBOOTLOADER_SIZE=$(strip $(BOOTLOADER_SIZE))

build_json.mk

@@ -22,6 +22,5 @@ else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_1)/keymap.json)","")
 endif
 
 # Generate the keymap.c
-ifneq ("$(KEYMAP_JSON)","")
-    _ = $(shell test -e $(KEYMAP_C) || bin/qmk json-keymap $(KEYMAP_JSON) -o $(KEYMAP_C))
-endif
+$(KEYBOARD_OUTPUT)/src/keymap.c: $(KEYMAP_JSON)
+	bin/qmk json-keymap --quiet --output $(KEYMAP_C) $(KEYMAP_JSON)

docs/ChangeLog/20200229.md

@@ -0,0 +1,75 @@
+# QMK Breaking Change - 2020 Feb 29 Changelog
+
+Four times a year QMK runs a process for merging Breaking Changes. A Breaking Change is any change which modifies how QMK behaves in a way that is incompatible or potentially dangerous. We limit these changes to 4 times per year so that users can have confidence that updating their QMK tree will not break their keymaps.
+
+
+## Update ChibiOS/ChibiOS-Contrib/uGFX submodules
+
+* General Notes
+    * A `make git-submodule` may be required after pulling the latest QMK firmware code to update affected submodules to the upgraded revisions
+    * Enabling link-time-optimization (`LINK_TIME_OPTIMIZATION_ENABLE = yes`) should work on a lot more boards
+* Upgrade to ChibiOS ver19.1.3
+    * This will allow QMK to update to upstream ChibiOS a lot easier -- the old version was ~2 years out of date. Automated update scripts have been made available to simplify future upgrades.
+    * Includes improved MCU support and bugfixes
+    * ChibiOS revision is now included in Command output
+    * Timers should now be more accurate
+* Upgrade to newer ChibiOS-Contrib
+    * Also includes improved MCU support and bugfixes
+    * ChibiOS-Contrib revision is now included in Command output
+* Upgrade to newer uGFX
+    * Required in order to support updated ChibiOS
+
+
+## Fix ChibiOS timer overflow for 16-bit SysTick devices
+
+* On 16-bit SysTick devices, the timer subsystem in QMK was incorrectly dealing with overflow.
+    * When running at a 100000 SysTick frequency (possible on 16-bit devices, but uncommon), this overflow would occur after 0.65 seconds.
+* Timers are now correctly handling this overflow case and timing should now be correct on ChibiOS/ARM.
+
+
+## Update LUFA submodule
+
+* Updates the LUFA submodule to include updates from upstream (abcminiuser/lufa)
+* Includes some cleanup for QMK DFU generation
+
+
+## Encoder flip
+
+* Flips the encoder direction so that `clockwise == true` is for actually turning the knob clockwise
+* Adds `ENCODER_DIRECTION_FLIP` define, so that reversing the expected dirction is simple for users.
+* Cleans up documentation page for encoders
+
+
+## Adding support for `BACKLIGHT_ON_STATE` for hardware PWM backlight
+
+* Previously, the define only affected software PWM, and hardware PWM always assumed an N-channel MOSFET.
+* The hardware PWM backlight setup has been updated to respect this option.
+* The default "on" state has been changed to `1` - **this impacts all keyboards using software PWM backlight that do not define it explicitly**. If your keyboard's backlight is acting strange, it may have a P-channel MOSFET, and will need to have `#define BACKLIGHT_ON_STATE 0` added to the keyboard-level `config.h`. Please see the PR for more detailed information.
+
+
+## Migrating `ACTION_LAYER_TAP_KEY()` entries in `fn_actions` to `LT()` keycodes
+
+* `fn_actions` is deprecated, and its functionality has been superseded by direct keycodes and `process_record_user()`
+* The end result of removing this obsolete feature should result in a decent reduction in firmware size and code complexity
+* All keymaps affected are recommended to switch away from `fn_actions` in favour of the [custom keycode](https://docs.qmk.fm/#/custom_quantum_functions) and [macro](https://docs.qmk.fm/#/feature_macros) features
+
+
+## Moving backlight keycode handling to `process_keycode/`
+
+* This refactors the backlight keycode logic to be clearer and more modular.
+* All backlight-related keycodes are now actioned in a single file.
+* The `ACTION_BACKLIGHT_*` macros have also been deleted. If you are still using these in a `fn_actions[]` block, please switch to using the backlight keycodes or functions directly.
+
+
+## Refactor Planck keymaps to use Layout Macros
+
+* Refactor Planck keymaps to use layout macros instead of raw matrix assignments
+* Makes keymaps revision-agnostic
+* Should reduce noise and errors in Travis CI logs
+
+
+## GON NerD codebase refactor
+
+* Splits the codebase for GON NerD 60 and NerdD TKL PCBs into two separate directories.
+* If your keymap is for a NerD 60 PCB, your `make` command is now `make gon/nerd60:<keymap>`.
+* If your keymap is for a NerD TKL PCB, your `make` command is now `make gon/nerdtkl:<keymap>`.

docs/README.md

@@ -15,7 +15,7 @@ QMK (*Quantum Mechanical Keyboard*) is an open source community that maintains Q
 
 If you plan on contributing a keymap, keyboard, or features to QMK, the easiest thing to do is [fork the repo through Github](https://github.com/qmk/qmk_firmware#fork-destination-box), and clone your repo locally to make your changes, push them, then open a [Pull Request](https://github.com/qmk/qmk_firmware/pulls) from your fork.
 
-Otherwise, you can either download it directly ([zip](https://github.com/qmk/qmk_firmware/zipball/master), [tar](https://github.com/qmk/qmk_firmware/tarball/master)), or clone it via git (`git@github.com:qmk/qmk_firmware.git`), or https (`https://github.com/qmk/qmk_firmware.git`).
+Otherwise, you can clone it directly with `git clone https://github.com/qmk/qmk_firmware`. Do not download the zip or tar files; a git repository is required to download the submodules in order to compile.
 
 ## How to Compile
 

docs/_langs.md

@@ -4,4 +4,6 @@
   - [:es: Español](/es/)
   - [:fr: Français](/fr-fr/)
   - [:he: עברית](/he-il/)
+  - [:brazil: Português](/pt-br/)
   - [:ru: Русский](/ru-ru/)
+  - [:jp: 日本語](/ja/)

docs/_summary.md

@@ -3,7 +3,10 @@
   * [Building Your First Firmware](newbs_building_firmware.md)
   * [Flashing Firmware](newbs_flashing.md)
   * [Testing and Debugging](newbs_testing_debugging.md)
-  * [Git Best Practices](newbs_best_practices.md)
+  * [Best Git Practices](newbs_git_best_practices.md)
+    * [Using Your Fork's Master](newbs_git_using_your_master_branch.md)
+    * [Resolving Merge Conflicts](newbs_git_resolving_merge_conflicts.md)
+    * [Resynchronizing a Branch](newbs_git_resynchronize_a_branch.md)
   * [Learning Resources](newbs_learn_more_resources.md)
 
 * [QMK Basics](README.md)
@@ -15,6 +18,7 @@
   * [Getting Help](getting_started_getting_help.md)
 
 * [Breaking Changes](breaking_changes.md)
+  * [My Pull Request Was Flagged](breaking_changes_instructions.md)
   * [2019 Aug 30](ChangeLog/20190830.md)
 
 * [FAQ](faq.md)
@@ -33,6 +37,7 @@
   * [Keymap Overview](keymap.md)
 
 * [Hardware](hardware.md)
+  * [Compatible Microcontrollers](compatible_microcontrollers.md)
   * [AVR Processors](hardware_avr.md)
   * [Drivers](hardware_drivers.md)
 
@@ -97,9 +102,12 @@
   * [Hand Wiring Guide](hand_wire.md)
   * [ISP Flashing Guide](isp_flashing_guide.md)
   * [ARM Debugging Guide](arm_debugging.md)
+  * [ADC Driver](adc_driver.md)
   * [I2C Driver](i2c_driver.md)
   * [WS2812 Driver](ws2812_driver.md)
+  * [EEPROM Driver](eeprom_driver.md)
   * [GPIO Controls](internals_gpio_control.md)
+  * [Custom Matrix](custom_matrix.md)
   * [Proton C Conversion](proton_c_conversion.md)
 
 * For a Deeper Understanding
@@ -110,7 +118,7 @@
   * [Using Eclipse with QMK](other_eclipse.md)
   * [Using VSCode with QMK](other_vscode.md)
   * [Support](support.md)
-  * [How to add translations](translating.md)
+  * [Translating the QMK Docs](translating.md)
 
 * QMK Internals (In Progress)
   * [Defines](internals_defines.md)

docs/adc_driver.md

@@ -0,0 +1,50 @@
+# ADC Driver
+
+QMK can leverage the Analog-to-Digital Converter (ADC) on supported MCUs to measure voltages on certain pins. This can be useful for implementing things such as battery level indicators for Bluetooth keyboards, or volume controls using a potentiometer, as opposed to a [rotary encoder](feature_encoders.md).
+
+This driver is currently AVR-only. The values returned are 10-bit integers (0-1023) mapped between 0V and VCC (usually 5V or 3.3V).
+
+## Usage
+
+To use this driver, add the following to your `rules.mk`:
+
+```make
+SRC += analog.c
+```
+
+Then place this include at the top of your code:
+
+```c
+#include "analog.h"
+```
+
+## Channels
+
+|Channel|AT90USB64/128|ATmega16/32U4|ATmega32A|ATmega328P|
+|-------|-------------|-------------|---------|----------|
+|0      |`F0`         |`F0`         |`A0`     |`C0`      |
+|1      |`F1`         |`F1`         |`A1`     |`C1`      |
+|2      |`F2`         |             |`A2`     |`C2`      |
+|3      |`F3`         |             |`A3`     |`C3`      |
+|4      |`F4`         |`F4`         |`A4`     |`C4`      |
+|5      |`F5`         |`F5`         |`A5`     |`C5`      |
+|6      |`F6`         |`F6`         |`A6`     |*         |
+|7      |`F7`         |`F7`         |`A7`     |*         |
+|8      |             |`D4`         |         |          |
+|9      |             |`D6`         |         |          |
+|10     |             |`D7`         |         |          |
+|11     |             |`B4`         |         |          |
+|12     |             |`B5`         |         |          |
+|13     |             |`B6`         |         |          |
+
+<sup>\* The ATmega328P possesses two extra ADC channels; however, they are not present on the DIP pinout, and are not shared with GPIO pins. You can use `adc_read()` directly to gain access to these.</sup>
+
+## Functions
+
+|Function                    |Description                                                                                                        |
+|----------------------------|-------------------------------------------------------------------------------------------------------------------|
+|`analogReference(mode)`     |Sets the analog voltage reference source. Must be one of `ADC_REF_EXTERNAL`, `ADC_REF_POWER` or `ADC_REF_INTERNAL`.|
+|`analogRead(pin)`           |Reads the value from the specified Arduino pin, eg. `4` for ADC6 on the ATmega32U4.                                |
+|`analogReadPin(pin)`        |Reads the value from the specified QMK pin, eg. `F6` for ADC6 on the ATmega32U4.                                   |
+|`pinToMux(pin)`             |Translates a given QMK pin to a mux value. If an unsupported pin is given, returns the mux value for "0V (GND)".   |
+|`adc_read(mux)`             |Reads the value from the ADC according to the specified mux. See your MCU's datasheet for more information.        |

docs/arm_debugging.md

@@ -1,4 +1,4 @@
-# ARM Debugging usign Eclipse
+# ARM Debugging using Eclipse
 
 This page describes how to setup debugging for ARM MCUs using an SWD adapter and open-source/free tools. In this guide we will install GNU MCU Eclipse IDE for C/C++ Developers and OpenOCD together with all the necessary dependencies.
 
@@ -18,7 +18,7 @@ XPM installation instructions can be found [here](https://www.npmjs.com/package/
 
 ### The ARM Toolchain
 
-Using XPM it is very easy to install the ARM toolchain. Enter the command `xpm install --global @gnu-mcu-eclipse/arm-none-eabi-gcc`.
+Using XPM it is very easy to install the ARM toolchain. Enter the command `xpm install --global @xpack-dev-tools/arm-none-eabi-gcc`.
 
 ### Windows build tools
 
@@ -33,7 +33,7 @@ If you have an ST-Link the drivers can be found [here](https://www.st.com/en/dev
 
 ### OpenOCD
 
-This dependency allows SWD access from GDB and it is essential for debugging. Run `xpm install --global @gnu-mcu-eclipse/openocd`.
+This dependency allows SWD access from GDB and it is essential for debugging. Run `xpm install --global @xpack-dev-tools/openocd`.
 
 ### Java
 
@@ -45,17 +45,17 @@ Now its finally time to install the IDE. Use the Release page [here](https://git
 
 ## Configuring Eclipse
 
-Open up the Eclipse IDE we just downloaded. To import our QMK directory select File -> Import -> C/C++ -> Existing code as Makefile Project. Select next and use Browse to select your QMK folder. In the tool-chain list select ARM Cross GCC and select Finish.
+Open up the Eclipse IDE we just downloaded. To import our QMK directory select File -> Import -> C/C++ -> Existing Code as Makefile Project. Select Next and use Browse to select your QMK folder. In the tool-chain list select ARM Cross GCC and select Finish.
 
-Now you can see the QMK folder on the left hand side. Right click it and select Properties. On the left hand side, expand MCU and select ARM Toolchain Paths. Press xPack and OK. Repeat for OpenOCD Path  and if you are on windows for Build Tool Path. Select Apply and Close.
+Now you can see the QMK folder on the left hand side. Right click it and select Properties. On the left hand side, expand MCU and select ARM Toolchains Paths. Press xPack and OK. Repeat for OpenOCD Path and if you are on Windows for Build Tools Path. Select Apply and Close.
 
-Now its time to install the necessary MCU packages. Go to Packs perspective by selecting Window -> Open Perspective -> Others -> Packs. Now select the yellow refresh symbol next to the Packs tab. This will take a long time as it is requesting the MCU definitions from various places. If some of the links fail you can probably select Ignore.
+Now its time to install the necessary MCU packages. Go to Packs perspective by selecting Window -> Perspective -> Open Perspective -> Other... -> Packs. Now select the yellow refresh symbol next to the Packs tab. This will take a long time as it is requesting the MCU definitions from various places. If some of the links fail you can probably select Ignore.
 
-When this finishes you must find the MCU which we will be building/debugging for. In this example I will be using the STM32F3 series MCUs. On the left, select STMicroelectonics -> STM32F3 Series. On the middle window we can see the pack. Right click and select Install. Once that is done we can go back to the default perspective, Window -> Open Perspective -> Others -> C/C++.
+When this finishes you must find the MCU which we will be building/debugging for. In this example I will be using the STM32F3 series MCUs. On the left, select STMicroelectronics -> STM32F3 Series. On the middle window we can see the pack. Right click and select Install. Once that is done we can go back to the default perspective, Window -> Perspective -> Open Perspective -> Other... -> C/C++.
 
-We need to let eclipse know the device we intent to build QMK on. Right click on the QMK folder -> Properties -> C/C++ Build -> Settings. Select the Devices tab and under devices select the appropriate variant of your MCU. For my example it is STM32F303CC
+We need to let eclipse know the device we intent to build QMK on. Right click on the QMK folder -> Properties -> C/C++ Build -> Settings. Select the Devices tab and under Devices select the appropriate variant of your MCU. For my example it is STM32F303CC
 
-While we are here let's setup the build command as well. Select C/C++ Build and then the Behavior tab. On the build command, replace `all` with your necessary make command. For example for a rev6 Planck with the default keymap this would be `planck/rev6:default`. Select Apply and Close.
+While we are here let's setup the build command as well. Select C/C++ Build and then the Behavior tab. On the Build command, replace `all` with your necessary make command. For example for a rev6 Planck with the default keymap this would be `planck/rev6:default`. Select Apply and Close.
 
 ## Building
 
@@ -71,7 +71,7 @@ NOTE: Make sure the SWCLK and SWDIO pins are not used in the matrix of your keyb
 
 ### Configuring the Debugger
 
-Right click on your QMK folder, select Debug As -> Debug Configuration. Here double click on GDB OpenOCD Debugging. Select the debugger tab and enter the configuration necessary for your MCU. This might take some fiddling and googleing to find out. The default script for the STM32F3 is called stm32f3discovery.cfg. To let OpenOCD know, in the Config options enter `-f board/stm32f3discovery.cfg`.
+Right click on your QMK folder, select Debug As -> Debug Configurations... . Here double click on GDB OpenOCD Debugging. Select the Debugger tab and enter the configuration necessary for your MCU. This might take some fiddling and Googling to find out. The default script for the STM32F3 is called `stm32f3discovery.cfg`. To let OpenOCD know, in the Config options enter `-f board/stm32f3discovery.cfg`.
 
 NOTE: In my case this configuration script requires editing to disable the reset assertion. The locations of the scripts can be found in the actual executable field usually under the path `openocd/version/.content/scripts/board`. Here I edited `reset_config srst_only` to `reset_config none`.
 
@@ -81,7 +81,7 @@ Select Apply and Close.
 
 Reset your keyboard.
 
-Press the bug icon and if all goes well you should soon find yourself in the debug perspective. Here the program counter will pause at the beginning of the main function and way for you to press Play. Most of the features of all debuggers work on ARM MCUs but for exact details google is your friend!
+Press the bug icon and if all goes well you should soon find yourself in the Debug perspective. Here the program counter will pause at the beginning of the main function and wait for you to press Play. Most of the features of all debuggers work on Arm MCUs but for exact details Google is your friend!
 
 
 Happy debugging!

docs/breaking_changes.md

@@ -6,20 +6,21 @@ The breaking change period is when we will merge PR's that change QMK in dangero
 
 ## What has been included in past Breaking Changes?
 
+* [2020 Feb 29](ChangeLog/20200229.md)
 * [2019 Aug 30](ChangeLog/20190830.md)
 
 ## When is the next Breaking Change?
 
-The next Breaking Change is scheduled for Nov 29.
+The next Breaking Change is scheduled for May 30, 2020.
 
 ### Important Dates
 
-* [x] 2019 Sep 21 - `future` is created. It will be rebased weekly.
-* [ ] 2019 Nov 01 - `future` closed to new PR's.
-* [ ] 2019 Nov 01 - Call for testers.
-* [ ] 2019 Nov 27 - `master` is locked, no PR's merged.
-* [ ] 2019 Nov 29 - Merge `future` to `master`.
-* [ ] 2019 Nov 30 - `master` is unlocked. PR's can be merged again.
+* [x] 2019 Feb 29 - `future` is created. It will be rebased weekly.
+* [ ] 2020 May 2 - `future` closed to new PR's.
+* [ ] 2020 May 2 - Call for testers.
+* [ ] 2020 May 28 - `master` is locked, no PR's merged.
+* [ ] 2020 May 30 - Merge `future` to `master`.
+* [ ] 2020 May 30 - `master` is unlocked. PR's can be merged again.
 
 ## What changes will be included?
 

docs/breaking_changes_instructions.md

@@ -0,0 +1,42 @@
+# Breaking Changes: My Pull Request Was Flagged
+
+A QMK member may have replied to your pull request stating that your submission is a breaking change. In their judgment, the changes you have proposed have greater implications for either QMK, or its users.
+
+Some things that may cause a pull request to be flagged are:
+
+- **Edits to User Keymaps**
+  A user may submit their keymap to QMK, then some time later open a pull request with further updates, only to find it can't be merged because it was edited in the `qmk/qmk_firmware` repository. As not all users are proficient at using Git or GitHub, the user may find themself unable to fix the issue on their own.
+- **Changes to Expected Behavior**
+  Changes to QMK behavior may cause users to believe their hardware or QMK is broken if they flash new firmware that incorporates changes to existing QMK features, and find themselves without a means to restore the desired behavior.
+- **Changes Requiring User Action**
+  Changes may also require action to be taken by users, such as updating a toolchain or taking some action in Git.
+- **Changes Necessitating Increased Scrutiny**
+  On occasion, a submission may have implications for QMK as a project. This could be copyright/licensing issues, coding conventions, large feature overhauls, "high-risk" changes that need wider testing by our community, or something else entirely.
+- **Changes Requiring Communication to End Users**
+  This includes warnings about future deprecations, outdated practices, and anything else that needs to be communicated but doesn't fit into one of the above categories.
+
+## What Do I Do?
+
+If it is determined that your submission is a breaking change, there are a few things you can do to smooth the process:
+
+### Consider Splitting Up Your PR
+
+If you are contributing core code, and the only reason it needs to go through breaking changes is that you are updating keymaps to match your change, consider whether you can submit your feature in a way that the old keymaps continue to work. Then submit a separate PR that goes through the breaking changes process to remove the old code.
+
+### Contribute a ChangeLog Entry
+
+We require submissions that go through the Breaking Change process to include a changelog entry. The entry should be a short summary of the changes your pull request makes – [each section here started as a changelog](ChangeLog/20190830.md "n.b. This should link to the 2019 Aug 30 Breaking Changes doc  - @noroadsleft").
+
+Your changelog should be located at `docs/ChangeLog/YYYYMMDD/PR####.md`, where `YYYYMMDD` is the date on which QMK's breaking change branch – usually named `future` – will be merged into the `master` branch, and `####` is the number of your pull request.
+
+If your submission requires action on the part of users, your changelog should instruct users what action(s) must be taken, or link to a location that does so.
+
+### Document Your Changes
+
+Understanding the purpose for your submission, and possible implications or actions it will require can make the review process more straightforward. A changelog may suffice for this purpose, but more extensive changes may require a level of detail that is ill-suited for a changelog.
+
+Commenting on your pull request and being responsive to questions, comments, and change requests is much appreciated.
+
+### Ask for Help
+
+Having your submission flagged may have caught you off guard. If you find yourself intimidated or overwhelmed, let us know. Comment on your pull request, or [reach out to the QMK team on Discord](https://discord.gg/Uq7gcHh).

docs/cli.md

@@ -71,17 +71,39 @@ There are some limitations to the local CLI compared to the global CLI:
 
 ## `qmk cformat`
 
-This command formats C code using clang-format. Run it with no arguments to format all core code, or pass filenames on the command line to run it on specific files.
+This command formats C code using clang-format. 
 
-**Usage**:
+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 compile`
 
-This command allows you to compile firmware from any directory. You can compile JSON exports from <https://config.qmk.fm> or compile keymaps in the repo.
+This command allows you to compile firmware from any directory. You can compile JSON exports from <https://config.qmk.fm>, compile keymaps in the repo, or compile the keyboard in the current working directory.
 
 **Usage for Configurator Exports**:
 
@@ -95,6 +117,77 @@ qmk compile <configuratorExport.json>
 qmk compile -kb <keyboard_name> -km <keymap_name>
 ```
 
+**Usage in Keyboard Directory**:  
+
+Must be in keyboard directory with a default keymap, or in keymap directory for keyboard, or supply one with `--keymap <keymap_name>`
+```
+qmk compile
+```
+
+**Example**:
+```
+$ qmk config compile.keymap=default
+$ cd ~/qmk_firmware/keyboards/planck/rev6
+$ qmk compile
+Ψ Compiling keymap with make planck/rev6:default
+...
+```
+or with optional keymap argument
+
+```
+$ cd ~/qmk_firmware/keyboards/clueboard/66/rev4 
+$ qmk compile -km 66_iso
+Ψ Compiling keymap with make clueboard/66/rev4:66_iso
+...
+```
+or in keymap directory
+
+```
+$ cd ~/qmk_firmware/keyboards/gh60/satan/keymaps/colemak
+$ qmk compile
+Ψ Compiling keymap with make make gh60/satan:colemak
+...
+```
+
+**Usage in Layout Directory**:  
+
+Must be under `qmk_firmware/layouts/`, and in a keymap folder.
+```
+qmk compile -kb <keyboard_name>
+```
+
+**Example**:
+```
+$ cd ~/qmk_firmware/layouts/community/60_ansi/mechmerlin-ansi
+$ qmk compile -kb dz60
+Ψ Compiling keymap with make dz60:mechmerlin-ansi
+...
+```
+
+## `qmk flash`
+
+This command is similar to `qmk compile`, but can also target a bootloader. The bootloader is optional, and is set to `:flash` by default.
+To specify a different bootloader, use `-bl <bootloader>`. Visit <https://docs.qmk.fm/#/flashing>
+for more details of the available bootloaders.
+
+**Usage for Configurator Exports**:
+
+```
+qmk flash <configuratorExport.json> -bl <bootloader>
+```
+
+**Usage for Keymaps**:
+
+```
+qmk flash -kb <keyboard_name> -km <keymap_name> -bl <bootloader>
+```
+
+**Listing the Bootloaders**
+
+```
+qmk flash -b
+```
+
 ## `qmk config`
 
 This command lets you configure the behavior of QMK. For the full `qmk config` documentation see [CLI Configuration](cli_configuration.md).
@@ -117,14 +210,28 @@ qmk docs [-p PORT]
 
 ## `qmk doctor`
 
-This command examines your environment and alerts you to potential build or flash problems.
+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.
 
 **Usage**:
 
 ```
-qmk doctor
+qmk doctor [-y] [-n]
 ```
 
+**Examples**:
+
+Check your environment for problems and prompt to fix them:
+
+    qmk doctor
+
+Check your environment and automatically fix any problems found:
+
+    qmk doctor -y
+
+Check your environment and report problems only:
+
+    qmk doctor -n
+
 ## `qmk json-keymap`
 
 Creates a keymap.c from a QMK Configurator export.
@@ -135,6 +242,28 @@ Creates a keymap.c from a QMK Configurator export.
 qmk json-keymap [-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`
@@ -145,6 +274,16 @@ This command lists all the keyboards currently defined in `qmk_firmware`
 qmk list-keyboards
 ```
 
+## `qmk list-keymaps`
+
+This command lists all the keymaps for a specified keyboard (and revision).
+
+**Usage**:
+
+```
+qmk list-keymaps -kb planck/ez
+```
+
 ## `qmk new-keymap`
 
 This command creates a new keymap based on a keyboard's existing default keymap.

docs/cli_development.md

@@ -173,3 +173,35 @@ You will only be able to access these arguments using `cli.args`. For example:
 ```
 cli.log.info('Reading from %s and writing to %s', cli.args.filename, cli.args.output)
 ```
+
+# Testing, and Linting, and Formatting (oh my!)
+
+We use nose2, flake8, and yapf to test, lint, and format code. You can use the `pytest` and `pyformat` subcommands to run these tests:
+
+### Testing and Linting
+
+    qmk pytest
+
+### Formatting
+
+    qmk pyformat
+
+## Formatting Details
+
+We use [yapf](https://github.com/google/yapf) to automatically format code. Our configuration is in the `[yapf]` section of `setup.cfg`.
+
+?> Tip- Many editors can use yapf as a plugin to automatically format code as you type.
+
+## Testing Details
+
+Our tests can be found in `lib/python/qmk/tests/`. You will find both unit and integration tests in this directory. We hope you will write both unit and integration tests for your code, but if you do not please favor integration tests. 
+
+If your PR does not include a comprehensive set of tests please add comments like this to your code so that other people know where they can help:
+
+    # TODO(unassigned/<yourGithubUsername>): Write <unit|integration> tests
+
+We use [nose2](https://nose2.readthedocs.io/en/latest/getting_started.html) to run our tests. You can refer to the nose2 documentation for more details on what you can do in your test functions.
+
+## Linting Details
+
+We use flake8 to lint our code. Your code should pass flake8 before you open a PR. This will be checked when you run `qmk pytest` and by CI when you submit a PR.

docs/coding_conventions_c.md

@@ -14,7 +14,7 @@ Most of our style is pretty easy to pick up on, but right now it's not entirely
   * Think of them as a story describing the feature
   * Use them liberally to explain why particular decisions were made.
   * Do not write obvious comments
-  * If you not sure if a comment is obvious, go ahead and include it.
+  * If you're not sure if a comment is obvious, go ahead and include it.
 * In general we don't wrap lines, they can be as long as needed. If you do choose to wrap lines please do not wrap any wider than 76 columns.
 * We use `#pragma once` at the start of header files rather than old-style include guards (`#ifndef THIS_FILE_H`, `#define THIS_FILE_H`, ..., `#endif`)
 * We accept both forms of preprocessor if's: `#ifdef DEFINED` and `#if defined(DEFINED)`

docs/coding_conventions_python.md

@@ -8,7 +8,7 @@ Most of our style follows PEP8 with some local modifications to make things less
   * Think of them as a story describing the feature
   * Use them liberally to explain why particular decisions were made.
   * Do not write obvious comments
-  * If you not sure if a comment is obvious, go ahead and include it.
+  * If you're not sure if a comment is obvious, go ahead and include it.
 * We require useful docstrings for all functions.
 * In general we don't wrap lines, they can be as long as needed. If you do choose to wrap lines please do not wrap any wider than 76 columns.
 * Some of our practices conflict with the wider python community to make our codebase more approachable to non-pythonistas.
@@ -309,6 +309,18 @@ FIXME(username): Revisit this code when the frob feature is done.
 
 ...where username is your GitHub username.
 
-# Unit Tests
+# Testing
 
-These are good. We should have some one day.
+We use a combination of Integration and Unit testing to ensure that the our code is as bug-free as possible. All the tests can be found in `lib/python/qmk/tests/`. You can run all the tests with `qmk pytest`.
+
+At the time of this writing our tests are not very comprehensive. Looking at the current tests and writing new test cases for untested situations is a great way to both familiarize yourself with the codebase and contribute to QMK.
+
+## 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.
+
+## Unit Tests
+
+The other `test_*.py` files in `lib/python/qmk/tests/` contain unit tests. You can write tests for individual functions inside `lib/python/qmk/` here. Generally these files are named after the module, with dots replaced by underscores.
+
+At the time of this writing we do not do any mocking for our tests. If you would like to help us change this please [open an issue](https://github.com/qmk/qmk_firmware/issues/new?assignees=&labels=cli%2C+python&template=other_issues.md&title=) or [join #cli on Discord](https://discord.gg/heQPAgy) and start a conversation there.

docs/compatible_microcontrollers.md

@@ -1,25 +1,36 @@
-# Atmel AVR
+# Compatible Microcontrollers
 
-QMK should run on any Atmel AVR processor with enough Flash. It has been tested on the following:
+QMK runs on any USB-capable AVR or ARM microcontroller with enough flash space - generally 32kB or more, though it will *just* squeeze into 16kB with most features disabled.
 
-* ATmega32U4 ([PJRC Teensy 2.0](http://www.pjrc.com/teensy/))
-* AT90USB1286 ([PJRC Teensy++ 2.0](http://www.pjrc.com/teensy/))
-* AT90USB1287 ([Atmel USBKEY](http://www.atmel.com/tools/AT90USBKEY.aspx))
-* ATmega168P with using [V-USB](http://www.obdev.at/products/vusb/index.html)
-* ATmega328P with using [V-USB](http://www.obdev.at/products/vusb/index.html)
-* ATmega32U2
-* AT90USB1286, 646, 647 should work
-* AT90USB162 testing...
+## Atmel AVR
 
-NOTE: To enable full features of firmware you'll need 32KB flash size.
+The following use [LUFA](https://www.fourwalledcubicle.com/LUFA.php) as the USB stack:
 
-Please add any tested microcontrollers to this list.
+* [ATmega16U2](https://www.microchip.com/wwwproducts/en/ATmega16U2) / [ATmega32U2](https://www.microchip.com/wwwproducts/en/ATmega32U2)
+* [ATmega16U4](https://www.microchip.com/wwwproducts/en/ATmega16U4) / [ATmega32U4](https://www.microchip.com/wwwproducts/en/ATmega32U4)
+* [AT90USB64](https://www.microchip.com/wwwproducts/en/AT90USB646) / [AT90USB128](https://www.microchip.com/wwwproducts/en/AT90USB1286)
 
-# ARM
+Certain MCUs which do not have native USB will use [V-USB](https://www.obdev.at/products/vusb/index.html) instead:
 
-You can also use any ARM processor that [ChibiOS](http://www.chibios.org) supports. The following processors have been tested:
+* [ATmega32A](https://www.microchip.com/wwwproducts/en/ATmega32A)
+* [ATmega328P](https://www.microchip.com/wwwproducts/en/ATmega328P)
 
-* [Kinetis MKL26Z64](http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/l-series-ultra-low-power-m0-plus/kinetis-kl2x-48-mhz-usb-ultra-low-power-microcontrollers-mcus-based-on-arm-cortex-m0-plus-core:KL2x)
-* [Kinetis MK20DX128](http://www.nxp.com/assets/documents/data/en/data-sheets/K20P64M50SF0.pdf)
-* [Kinetis MK20DX128](http://www.nxp.com/assets/documents/data/en/data-sheets/K20P64M50SF0.pdf)
-* [Kinetis MK20DX256](http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/k-series-performance-m4/k2x-usb/kinetis-k20-72-mhz-full-speed-usb-mixed-signal-integration-microcontrollers-mcus-based-on-arm-cortex-m4-core:K20_72)
+## ARM
+
+You can also use any ARM chip with USB that [ChibiOS](http://www.chibios.org) supports. Most have plenty of flash. Known to work are:
+
+### STMicroelectronics (STM32)
+
+ * [STM32F0x2](https://www.st.com/en/microcontrollers-microprocessors/stm32f0x2.html)
+ * [STM32F103](https://www.st.com/en/microcontrollers-microprocessors/stm32f103.html)
+ * [STM32F303](https://www.st.com/en/microcontrollers-microprocessors/stm32f303.html)
+
+### NXP (Kinetis)
+
+ * [MKL26Z64](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/kl-series-cortex-m0-plus/kinetis-kl2x-72-96-mhz-usb-ultra-low-power-microcontrollers-mcus-based-on-arm-cortex-m0-plus-core:KL2x)
+ * [MK20DX128](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/k-series-cortex-m4/k2x-usb/kinetis-k20-50-mhz-full-speed-usb-mixed-signal-integration-microcontrollers-based-on-arm-cortex-m4-core:K20_50)
+ * [MK20DX256](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/k-series-cortex-m4/k2x-usb/kinetis-k20-72-mhz-full-speed-usb-mixed-signal-integration-microcontrollers-mcus-based-on-arm-cortex-m4-core:K20_72)
+
+## Atmel ATSAM
+
+There is limited support for one of Atmel's ATSAM microcontrollers, that being the [ATSAMD51J18A](https://www.microchip.com/wwwproducts/en/ATSAMD51J18A) used by the [Massdrop keyboards](https://github.com/qmk/qmk_firmware/tree/master/keyboards/massdrop).

docs/config_options.md

@@ -53,6 +53,8 @@ This is a C header file that is one of the first things included, and will persi
   * pins of the rows, from top to bottom
 * `#define MATRIX_COL_PINS { F1, F0, B0, C7, F4, F5, F6, F7, D4, D6, B4, D7 }`
   * pins of the columns, from left to right
+* `#define MATRIX_IO_DELAY 30`
+  * the delay in microseconds when between changing matrix pin state and reading values
 * `#define UNUSED_PINS { D1, D2, D3, B1, B2, B3 }`
   * pins unused by the keyboard for reference
 * `#define MATRIX_HAS_GHOST`
@@ -78,7 +80,7 @@ This is a C header file that is one of the first things included, and will persi
 * `#define BACKLIGHT_PIN B7`
   * pin of the backlight
 * `#define BACKLIGHT_LEVELS 3`
-  * number of levels your backlight will have (maximum 15 excluding off)
+  * number of levels your backlight will have (maximum 31 excluding off)
 * `#define BACKLIGHT_BREATHING`
   * enables backlight breathing
 * `#define BREATHING_PERIOD 6`
@@ -140,13 +142,19 @@ If you define these options you will enable the associated feature, which may in
 * `#define PERMISSIVE_HOLD`
   * makes tap and hold keys trigger the hold if another key is pressed before releasing, even if it hasn't hit the `TAPPING_TERM`
   * See [Permissive Hold](feature_advanced_keycodes.md#permissive-hold) for details
+* `#define PERMISSIVE_HOLD_PER_KEY`
+  * enabled handling for per key `PERMISSIVE_HOLD` settings
 * `#define IGNORE_MOD_TAP_INTERRUPT`
   * makes it possible to do rolling combos (zx) with keys that convert to other keys on hold, by enforcing the `TAPPING_TERM` for both keys.
   * See [Mod tap interrupt](feature_advanced_keycodes.md#ignore-mod-tap-interrupt) for details
+* `#define IGNORE_MOD_TAP_INTERRUPT_PER_KEY`
+  * enables handling for per key `IGNORE_MOD_TAP_INTERRUPT` settings
 * `#define TAPPING_FORCE_HOLD`
   * makes it possible to use a dual role key as modifier shortly after having been tapped
   * See [Hold after tap](feature_advanced_keycodes.md#tapping-force-hold)
   * Breaks any Tap Toggle functionality (`TT` or the One Shot Tap Toggle)
+* `#define TAPPING_FORCE_HOLD_PER_KEY`
+  * enables handling for per key `TAPPING_FORCE_HOLD` settings
 * `#define LEADER_TIMEOUT 300`
   * how long before the leader key times out
     * If you're having issues finishing the sequence before it times out, you may need to increase the timeout setting. Or you may want to enable the `LEADER_PER_KEY_TIMING` option, which resets the timeout after each key is tapped.
@@ -196,8 +204,8 @@ If you define these options you will enable the associated feature, which may in
   * units to step when in/decreasing saturation
 * `#define RGBLIGHT_VAL_STEP 12`
   * units to step when in/decreasing value (brightness)
-* `#define RGBW_BB_TWI`
-  * bit-bangs TWI to EZ RGBW LEDs (only required for Ergodox EZ)
+* `#define RGBW`
+  * Enables RGBW LED support
 
 ## Mouse Key Options
 
@@ -272,9 +280,12 @@ There are a few different ways to set handedness for split keyboards (listed in
   * Default behavior for ARM
   * Required for AVR Teensy
 
-* `#define SPLIT_USB_TIMEOUT 2500`
+* `#define SPLIT_USB_TIMEOUT 2000`
   * Maximum timeout when detecting master/slave when using `SPLIT_USB_DETECT`
 
+* `#define SPLIT_USB_TIMEOUT_POLL 10`
+  * Poll frequency when detecting master/slave when using `SPLIT_USB_DETECT`
+
 # The `rules.mk` File
 
 This is a [make](https://www.gnu.org/software/make/manual/make.html) file that is included by the top-level `Makefile`. It is used to set some information about the MCU that we will be compiling for as well as enabling and disabling certain features.
@@ -287,8 +298,27 @@ This is a [make](https://www.gnu.org/software/make/manual/make.html) file that i
   * Defines which format (bin, hex) is copied to the root `qmk_firmware` folder after building.
 * `SRC`
   * Used to add files to the compilation/linking list.
+* `LIB_SRC`
+  * Used to add files as a library to the compilation/linking list.  
+    The files specified by `LIB_SRC` is linked after the files specified by `SRC`.  
+    For example, if you specify:
+    ```
+    SRC += a.c
+    LIB_SRC += lib_b.c
+    SRC += c.c
+    LIB_SRC += lib_d.c
+    ```
+    The link order is as follows.
+    ```
+     ...  a.o c.o  ...  lib_b.a lib_d.a  ...
+    ```
 * `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`
+* `LTO_ENABLE`
+  * It 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`
@@ -347,8 +377,6 @@ Use these to enable or disable building certain features. The more you have enab
   * Forces the keyboard to wait for a USB connection to be established before it starts up
 * `NO_USB_STARTUP_CHECK`
   * Disables usb suspend check after keyboard startup. Usually the keyboard waits for the host to wake it up before any tasks are performed. This is useful for split keyboards as one half will not get a wakeup call but must send commands to the master.
-* `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 noticable).  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`
 
 ## USB Endpoint Limitations