Fix omnikeyish

WHAT YEAR IS IT?!

.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

@@ -1,13 +1,15 @@
 [submodule "lib/chibios"]
 	path = lib/chibios
 	url = https://github.com/qmk/ChibiOS
+	branch = master
 [submodule "lib/chibios-contrib"]
 	path = lib/chibios-contrib
 	url = https://github.com/qmk/ChibiOS-Contrib
-	branch = k-type-fix
+	branch = master
 [submodule "lib/ugfx"]
 	path = lib/ugfx
 	url = https://github.com/qmk/uGFX
+	branch = master
 [submodule "lib/googletest"]
 	path = lib/googletest
 	url = https://github.com/google/googletest

.travis.yml

@@ -12,6 +12,18 @@ env:
   - MAKEFLAGS="-j3 --output-sync"
 services:
   - docker
+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:
@@ -20,13 +32,6 @@ script:
   - bash util/travis_test.sh
   - bash util/travis_build.sh
   - bash util/travis_docs.sh
-addons:
-  apt:
-    packages:
-    - pandoc
-    - diffutils
-    - dos2unix
-    - doxygen
 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

@@ -623,13 +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

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))

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/_summary.md

@@ -18,6 +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)
@@ -104,7 +105,9 @@
   * [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

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] 2020 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 +117,53 @@ 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.
@@ -141,14 +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.
@@ -191,6 +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/coding_conventions_python.md

@@ -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/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.
@@ -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`
@@ -347,9 +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 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`
-  * Alternatively, you can use `LTO_ENABLE` instead of `LINK_TIME_OPTIMIZATION_ENABLE`. 
 
 ## USB Endpoint Limitations
 

docs/custom_matrix.md

@@ -0,0 +1,108 @@
+# Custom Matrix
+
+QMK provides a mechanism to supplement or replace the default matrix scanning routine with your own code.
+
+The reasons to use this feature include:
+
+* Extra hardware between the keyboard's switches and MCU pins
+  * I/O multiplexer
+  * Line decoder
+* Irregular switch matrix
+  * Simultaneous use of `COL2ROW` and `ROW2COL`
+
+## Prerequisites
+
+Implementing custom matrix usually involves compilation of an additional source file. It is recommended that for consistency, this file is called `matrix.c`.
+
+Add a new file to your keyboard directory:
+```text
+keyboards/<keyboard>/matrix.c
+```
+
+And to configure compilation for the new file, add this to your `rules.mk`:
+```make
+SRC += matrix.c
+```
+
+## 'lite'
+
+Provides a default implementation for various scanning functions, reducing the boilerplate code when implementing custom matrix.
+To configure it, add this to your `rules.mk`:
+
+```make
+CUSTOM_MATRIX = lite
+```
+
+And implement the following functions in a `matrix.c` file in your keyboard folder:
+
+```c
+void matrix_init_custom(void) {
+    // TODO: initialize hardware here
+}
+
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+    bool matrix_has_changed = false;
+
+    // TODO: add matrix scanning routine here
+
+    return matrix_has_changed;
+}
+```
+
+
+## Full Replacement
+
+When more control over the scanning routine is required, you can choose to implement the full scanning routine.
+To configure it, add this to your rules.mk:
+
+```make
+CUSTOM_MATRIX = yes
+```
+
+And implement the following functions in a `matrix.c` file in your keyboard folder:
+
+```c
+matrix_row_t matrix_get_row(uint8_t row) {
+    // TODO: return the requested row data
+}
+
+void matrix_print(void) {
+    // TODO: use print() to dump the current matrix state to console
+}
+
+void matrix_init(void) {
+    // TODO: initialize hardware and global matrix state here
+
+    // Unless hardware debouncing - Init the configured debounce routine
+    debounce_init(MATRIX_ROWS);
+
+    // This *must* be called for correct keyboard behavior
+    matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+    bool matrix_has_changed = false;
+
+    // TODO: add matrix scanning routine here
+
+    // Unless hardware debouncing - use the configured debounce routine
+    debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
+
+    // This *must* be called for correct keyboard behavior
+    matrix_scan_quantum();
+
+    return matrix_has_changed;
+}
+```
+
+And also provide defaults for the following callbacks:
+
+```c
+__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+
+__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
+
+__attribute__((weak)) void matrix_init_user(void) {}
+
+__attribute__((weak)) void matrix_scan_user(void) {}
+```

docs/custom_quantum_functions.md

@@ -489,14 +489,24 @@ The `val` is the value of the data that you want to write to EEPROM.  And the `e
 
 # Custom Tapping Term
 
-By default, the tapping term is defined globally, and is not configurable by key.  For most users, this is perfectly fine.  But in come cases, dual function keys would be greatly improved by different timeouts than `LT` keys, or because some keys may be easier to hold than others.  Instead of using custom key codes for each, this allows for per key configurable `TAPPING_TERM`.
+By default, the tapping term and related options (such as `IGNORE_MOD_TAP_INTERRUPT`) are defined globally, and are not configurable by key.  For most users, this is perfectly fine.  But in some cases, dual function keys would be greatly improved by different timeout behaviors than `LT` keys, or because some keys may be easier to hold than others.  Instead of using custom key codes for each, this allows for per key configurable timeout behaviors.
 
-To enable this functionality, you need to add `#define TAPPING_TERM_PER_KEY` to your `config.h`, first. 
+There are two configurable options to control per-key timeout behaviors:
+
+- `TAPPING_TERM_PER_KEY`
+- `IGNORE_MOD_TAP_INTERRUPT_PER_KEY`
+
+You need to add `#define` lines to your `config.h` for each feature you want.
+
+```
+#define TAPPING_TERM_PER_KEY
+#define IGNORE_MOD_TAP_INTERRUPT_PER_KEY
+```
 
 
 ## Example `get_tapping_term` Implementation
 
-To change the `TAPPING TERM` based on the keycode, you'd want to add something like the following to your `keymap.c` file: 
+To change the `TAPPING_TERM` based on the keycode, you'd want to add something like the following to your `keymap.c` file:
 
 ```c
 uint16_t get_tapping_term(uint16_t keycode) {
@@ -511,6 +521,21 @@ uint16_t get_tapping_term(uint16_t keycode) {
 }
 ```
 
-### `get_tapping_term` Function Documentation
+## Example `get_ignore_mod_tap_interrupt` Implementation
 
-Unlike many of the other functions here, there isn't a need (or even reason) to have a quantum or keyboard level function. Only a user level function is useful here, so no need to mark it as such.
+To change the `IGNORE_MOD_TAP_INTERRUPT` value based on the keycode, you'd want to add something like the following to your `keymap.c` file:
+
+```c
+bool get_ignore_mod_tap_interrupt(uint16_t keycode) {
+  switch (keycode) {
+    case SFT_T(KC_SPC):
+      return true;
+    default:
+      return false;
+  }
+}
+```
+
+## `get_tapping_term` / `get_ignore_mod_tap_interrupt` Function Documentation
+
+Unlike many of the other functions here, there isn't a need (or even reason) to have a quantum or keyboard level function. Only user level functions are useful here, so no need to mark them as such.

docs/eeprom_driver.md

@@ -0,0 +1,50 @@
+# EEPROM Driver Configuration
+
+The EEPROM driver can be swapped out depending on the needs of the keyboard, or whether extra hardware is present.
+
+Driver                      | Description
+--------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+`EEPROM_DRIVER = vendor`    | Uses the on-chip driver provided by the chip manufacturer. For AVR, this is provided by avr-libc. This is supported on ARM for a subset of chips -- STM32F3xx, STM32F1xx, and STM32F072xB will be emulated by writing to flash. Other chips will generally act as "transient" below.
+`EEPROM_DRIVER = i2c`       | Supports writing to I2C-based 24xx EEPROM chips. See the driver section below.
+`EEPROM_DRIVER = transient` | Fake EEPROM driver -- supports reading/writing to RAM, and will be discarded when power is lost.
+
+## Vendor Driver Configuration
+
+No configurable options are available.
+
+## I2C Driver Configuration
+
+Currently QMK supports 24xx-series chips over I2C. As such, requires a working i2c_master driver configuration. You can override the driver configuration via your config.h:
+
+`config.h` override                         | Description                                                                         | Default Value
+------------------------------------------- | ----------------------------------------------------------------------------------- | ------------------------------------
+`#define EXTERNAL_EEPROM_I2C_BASE_ADDRESS`  | Base I2C address for the EEPROM -- shifted left by 1 as per i2c_master requirements | 0b10100000
+`#define EXTERNAL_EEPROM_I2C_ADDRESS(addr)` | Calculated I2C address for the EEPROM                                               | `(EXTERNAL_EEPROM_I2C_BASE_ADDRESS)`
+`#define EXTERNAL_EEPROM_BYTE_COUNT`        | Total size of the EEPROM in bytes                                                   | 8192
+`#define EXTERNAL_EEPROM_PAGE_SIZE`         | Page size of the EEPROM in bytes, as specified in the datasheet                     | 32
+`#define EXTERNAL_EEPROM_ADDRESS_SIZE`      | The number of bytes to transmit for the memory location within the EEPROM           | 2
+`#define EXTERNAL_EEPROM_WRITE_TIME`        | Write cycle time of the EEPROM, as specified in the datasheet                       | 5
+
+Default values and extended descriptions can be found in `drivers/eeprom/eeprom_i2c.h`.
+
+Alternatively, there are pre-defined hardware configurations for available chips/modules:
+
+Module           | Equivalent `#define`            | Source
+-----------------|---------------------------------|------------------------------------------
+CAT24C512 EEPROM | `#define EEPROM_I2C_CAT24C512`  | <https://www.sparkfun.com/products/14764>
+RM24C512C EEPROM | `#define EEPROM_I2C_RM24C512C`  | <https://www.sparkfun.com/products/14764>
+24LC128 EEPROM   | `#define EEPROM_I2C_24LC128`    | <https://www.microchip.com/wwwproducts/en/24LC128>
+24LC256 EEPROM   | `#define EEPROM_I2C_24LC256`    | <https://www.sparkfun.com/products/525>
+MB85RC256V FRAM  | `#define EEPROM_I2C_MB85RC256V` | <https://www.adafruit.com/product/1895>
+
+?> If you find that the EEPROM is not cooperating, ensure you've correctly shifted up your EEPROM address by 1. For example, the datasheet might state the address as `0b01010000` -- the correct value of `EXTERNAL_EEPROM_I2C_BASE_ADDRESS` needs to be `0b10100000`.
+
+## Transient Driver configuration
+
+The only configurable item for the transient EEPROM driver is its size:
+
+`config.h` override             | Description                               | Default Value
+------------------------------- | ----------------------------------------- | -------------
+`#define TRANSIENT_EEPROM_SIZE` | Total size of the EEPROM storage in bytes | 64
+
+Default values and extended descriptions can be found in `drivers/eeprom/eeprom_transient.h`.

docs/faq_build.md

@@ -119,24 +119,29 @@ The solution is to remove and reinstall all affected modules.
 
 ```
 brew rm avr-gcc
+brew rm avr-gcc@8
 brew rm dfu-programmer
 brew rm dfu-util
 brew rm gcc-arm-none-eabi
+brew rm arm-gcc-bin@8
 brew rm avrdude
-brew install avr-gcc
+brew install avr-gcc@8
 brew install dfu-programmer
 brew install dfu-util
-brew install gcc-arm-none-eabi
+brew install arm-gcc-bin@8
 brew install avrdude
+brew link --force avr-gcc@8
+brew link --force arm-gcc-bin@8
+
 ```
 
-### avr-gcc 8.1 and LUFA
+### `avr-gcc` and LUFA
 
-If you updated your avr-gcc to above 7 you may see errors involving LUFA. For example:
+If you updated your `avr-gcc` and you see errors involving LUFA, for example:
 
 `lib/lufa/LUFA/Drivers/USB/Class/Device/AudioClassDevice.h:380:5: error: 'const' attribute on function returning 'void'`
 
-For now, you need to rollback avr-gcc to 7 in brew.
+For now, you need to rollback `avr-gcc` to 8 in Homebrew.
 
 ```
 brew uninstall --force avr-gcc

docs/feature_advanced_keycodes.md

@@ -265,6 +265,25 @@ Normally, if you do all this within the `TAPPING_TERM` (default: 200ms) this wil
 
 ?> If you have `Ignore Mod Tap Interrupt` enabled, as well, this will modify how both work. The regular key has the modifier added if the first key is released first or if both keys are held longer than the `TAPPING_TERM`.
 
+For more granular control of this feature, you can add the following to your `config.h`:
+
+```c
+#define PERMISSIVE_HOLD_PER_KEY
+```
+
+You can then add the following function to your keymap:
+
+```c
+bool get_permissive_hold(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case SFT_T(KC_A):
+      return true;
+    default:
+      return false;
+  }
+}
+```
+
 ## Ignore Mod Tap Interrupt
 
 To enable this setting, add this to your `config.h`:
@@ -291,6 +310,25 @@ Normally, this would send `X` (`SHIFT`+`x`). With `Ignore Mod Tap Interrupt` ena
 
 ?> If you have `Permissive Hold` enabled, as well, this will modify how both work. The regular key has the modifier added if the first key is released first or if both keys are held longer than the `TAPPING_TERM`.
 
+For more granular control of this feature, you can add the following to your `config.h`:
+
+```c
+#define IGNORE_MOD_TAP_INTERRUPT_PER_KEY
+```
+
+You can then add the following function to your keymap:
+
+```c
+bool get_ignore_mod_tap_interrupt(uint16_t keycode) {
+  switch (keycode) {
+    case SFT_T(KC_SPC):
+      return true;
+    default:
+      return false;
+  }
+}
+```
+
 ## Tapping Force Hold
 
 To enable `tapping force hold`, add the following to your `config.h`: 
@@ -315,6 +353,25 @@ With `TAPPING_FORCE_HOLD`, the second press will be interpreted as a Shift, allo
 
 !> `TAPPING_FORCE_HOLD` will break anything that uses tapping toggles (Such as the `TT` layer keycode, and the One Shot Tapping Toggle).
 
+For more granular control of this feature, you can add the following to your `config.h`:
+
+```c
+#define TAPPING_FORCE_HOLD_PER_KEY
+```
+
+You can then add the following function to your keymap:
+
+```c
+bool get_tapping_force_hold(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case LT(1, KC_BSPC):
+      return true;
+    default:
+      return false;
+  }
+}
+```
+
 ## Retro Tapping
 
 To enable `retro tapping`, add the following to your `config.h`: 

docs/feature_backlight.md

@@ -119,10 +119,22 @@ When both timers are in use for Audio, the backlight PWM will not use a hardware
 
 To change the behavior of the backlighting, `#define` these in your `config.h`:
 
-|Define               |Default      |Description                                                                                                   |
-|---------------------|-------------|--------------------------------------------------------------------------------------------------------------|
-|`BACKLIGHT_PIN`      |`B7`         |The pin that controls the LEDs. Unless you are designing your own keyboard, you shouldn't need to change this |
-|`BACKLIGHT_PINS`     |*Not defined*|experimental: see below for more information                                                                  |
+|Define               |Default      |Description                                                                                                  |
+|---------------------|-------------|-------------------------------------------------------------------------------------------------------------|
+|`BACKLIGHT_PIN`      |`B7`         |The pin that controls the LEDs. Unless you are designing your own keyboard, you shouldn't need to change this|
+|`BACKLIGHT_PINS`     |*Not defined*|experimental: see below for more information                                                                 |
+|`BACKLIGHT_LEVELS`   |`3`          |The number of brightness levels (maximum 31 excluding off)                                                   |
+|`BACKLIGHT_CAPS_LOCK`|*Not defined*|Enable Caps Lock indicator using backlight (for keyboards without dedicated LED)                             |
+|`BACKLIGHT_BREATHING`|*Not defined*|Enable backlight breathing, if supported                                                                     |
+|`BREATHING_PERIOD`   |`6`          |The length of one backlight "breath" in seconds                                                              |
+|`BACKLIGHT_ON_STATE` |`1`          |The state of the backlight pin when the backlight is "on" - `1` for high, `0` for low                        |
+
+### Backlight On State
+
+Most backlight circuits are driven by an N-channel MOSFET or NPN transistor. This means that to turn the transistor *on* and light the LEDs, you must drive the backlight pin, connected to the gate or base, *high*.
+Sometimes, however, a P-channel MOSFET, or a PNP transistor is used. In this case, when the transistor is on, the pin is driven *low* instead.
+
+This functionality is configured at the keyboard level with the `BACKLIGHT_ON_STATE` define.
 
 ### Multiple backlight pins
 
@@ -167,7 +179,7 @@ BACKLIGHT_DRIVER = pwm
 
 Currently only hardware PWM is supported, not timer assisted, and does not provide automatic configuration.
 
-?> STMF072 support is being investigated.
+?> Backlight support for STMF072 has had limited testing, YMMV. If unsure, set `BACKLIGHT_ENABLE = no` in your rules.mk.
 
 ### ARM Configuration
 

docs/feature_encoders.md

@@ -2,23 +2,35 @@
 
 Basic encoders are supported by adding this to your `rules.mk`:
 
-    ENCODER_ENABLE = yes
+```make
+ENCODER_ENABLE = yes
+```
 
 and this to your `config.h`:
 
-    #define ENCODERS_PAD_A { B12 }
-    #define ENCODERS_PAD_B { B13 }
+```c
+#define ENCODERS_PAD_A { B12 }
+#define ENCODERS_PAD_B { B13 }
+```
 
 Each PAD_A/B variable defines an array so multiple encoders can be defined, e.g.:
 
-    #define ENCODERS_PAD_A { encoder1a, encoder2a }
-    #define ENCODERS_PAD_B { encoder1b, encoder2b }
+```c
+#define ENCODERS_PAD_A { encoder1a, encoder2a }
+#define ENCODERS_PAD_B { encoder1b, encoder2b }
+```
 
-If your encoder's clockwise directions are incorrect, you can swap the A & B pad definitions.
+If your encoder's clockwise directions are incorrect, you can swap the A & B pad definitions.  They can also be flipped with a define:
+
+```c
+#define ENCODER_DIRECTION_FLIP
+```
 
 Additionally, the resolution can be specified in the same file (the default & suggested is 4):
 
-    #define ENCODER_RESOLUTION 4
+```c
+#define ENCODER_RESOLUTION 4
+```
 
 ## Split Keyboards
 
@@ -33,27 +45,31 @@ If you are using different pinouts for the encoders on each half of a split keyb
 
 The callback functions can be inserted into your `<keyboard>.c`:
 
-    void encoder_update_kb(uint8_t index, bool clockwise) {
-        encoder_update_user(index, clockwise);
-    }
+```c
+void encoder_update_kb(uint8_t index, bool clockwise) {
+    encoder_update_user(index, clockwise);
+}
+```
 
 or `keymap.c`:
 
-    void encoder_update_user(uint8_t index, bool clockwise) {
-      if (index == 0) { /* First encoder */
+```c
+void encoder_update_user(uint8_t index, bool clockwise) {
+    if (index == 0) { /* First encoder */
         if (clockwise) {
-          tap_code(KC_PGDN);
+            tap_code(KC_PGDN);
         } else {
-          tap_code(KC_PGUP);
+            tap_code(KC_PGUP);
         }
-      } else if (index == 1) { /* Second encoder */  
+        } else if (index == 1) { /* Second encoder */  
         if (clockwise) {
-          tap_code(KC_UP);
+            tap_code(KC_DOWN);
         } else {
-          tap_code(KC_DOWN);
+            tap_code(KC_UP);
         }
-      }
     }
+}
+```
 
 ## Hardware
 

docs/feature_macros.md

@@ -107,6 +107,16 @@ Would tap `KC_HOME` - note how the prefix is now `X_`, and not `KC_`. You can al
 
 Which would send "VE" followed by a `KC_HOME` tap, and "LO" (spelling "LOVE" if on a newline).
 
+Delays can be also added to the string:
+
+* `SS_DELAY(msecs)` will delay for the specified number of milliseconds.
+
+For example:
+
+    SEND_STRING("VE" SS_DELAY(1000) SS_TAP(X_HOME) "LO");
+
+Which would send "VE" followed by a 1-second delay, then a `KC_HOME` tap, and "LO" (spelling "LOVE" if on a newline, but delayed in the middle).
+
 There's also a couple of mod shortcuts you can use:
 
 * `SS_LCTL(string)`
@@ -154,6 +164,8 @@ SEND_STRING(".."SS_TAP(X_END));
 
 There are some functions you may find useful in macro-writing. Keep in mind that while you can write some fairly advanced code within a macro, if your functionality gets too complex you may want to define a custom keycode instead. Macros are meant to be simple.
 
+?> You can also use the functions described in [Useful function](ref_functions.md) for additional functionality. For example `reset_keyboard()` allows you to reset the keyboard as part of a macro.
+
 ### `record->event.pressed`
 
 This is a boolean value that can be tested to see if the switch is being pressed or released. An example of this is
@@ -198,11 +210,11 @@ This will clear all mods currently pressed.
 
 This will clear all keys besides the mods currently pressed.
 
-## Advanced Example: 
+## Advanced Example:
 
 ### Super ALT↯TAB
 
-This macro will register `KC_LALT` and tap `KC_TAB`, then wait for 1000ms. If the key is tapped again, it will send another `KC_TAB`; if there is no tap, `KC_LALT` will be unregistered, thus allowing you to cycle through windows. 
+This macro will register `KC_LALT` and tap `KC_TAB`, then wait for 1000ms. If the key is tapped again, it will send another `KC_TAB`; if there is no tap, `KC_LALT` will be unregistered, thus allowing you to cycle through windows.
 
 ```c
 bool is_alt_tab_active = false;    # ADD this near the begining of keymap.c
@@ -219,7 +231,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
         if (!is_alt_tab_active) {
           is_alt_tab_active = true;
           register_code(KC_LALT);
-        } 
+        }
         alt_tab_timer = timer_read();
         register_code(KC_TAB);
       } else {
@@ -230,7 +242,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   return true;
 }
 
-void matrix_scan_user(void) {     # The very important timer. 
+void matrix_scan_user(void) {     # The very important timer.
   if (is_alt_tab_active) {
     if (timer_elapsed(alt_tab_timer) > 1000) {
       unregister_code(KC_LALT);
@@ -319,7 +331,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 ```
 
 
-## Advanced Example: 
+## Advanced Example:
 
 ### Single-Key Copy/Paste
 

docs/feature_oled_driver.md

@@ -1,139 +1,142 @@
 # OLED Driver
 
-## OLED Supported Hardware
+## Supported Hardware
 
 OLED modules using SSD1306 or SH1106 driver ICs, communicating over I2C.
 Tested combinations:
 
-| IC driver |   Size | Keyboard Platform | Notes                    |
-|-----------|--------|-------------------|--------------------------|
-| SSD1306   | 128x32 | AVR               | Primary support          |
-| SSD1306   | 128x64 | AVR               | Verified working         |
-| SSD1306   | 128x32 | ARM               |                          |
-| SH1106    | 128x64 | AVR               | No rotation or scrolling |
+|IC       |Size  |Platform|Notes                   |
+|---------|------|--------|------------------------|
+|SSD1306  |128x32|AVR     |Primary support         |
+|SSD1306  |128x64|AVR     |Verified working        |
+|SSD1306  |128x32|Arm     |                        |
+|SH1106   |128x64|AVR     |No rotation or scrolling|
 
-Hardware configurations using ARM-based microcontrollers or different sizes of OLED modules may be compatible, but are untested.
+Hardware configurations using Arm-based microcontrollers or different sizes of OLED modules may be compatible, but are untested.
 
-!> Warning: This OLED Driver currently uses the new i2c_master driver from split common code. If your split keyboard uses I2C to communicate between sides, this driver could cause an address conflict (serial is fine). Please contact your keyboard vendor and ask them to migrate to the latest split common code to fix this. In addition, the display timeout system to reduce OLED burn-in also uses split common to detect keypresses, so you will need to implement custom timeout logic for non-split common keyboards.
+!> Warning: This OLED driver currently uses the new i2c_master driver from Split Common code. If your split keyboard uses I2C to communicate between sides, this driver could cause an address conflict (serial is fine). Please contact your keyboard vendor and ask them to migrate to the latest Split Common code to fix this. In addition, the display timeout system to reduce OLED burn-in also uses Split Common to detect keypresses, so you will need to implement custom timeout logic for non-Split Common keyboards.
 
 ## Usage
 
-To enable the OLED feature, there are three steps. First, when compiling your keyboard, you'll need to set `OLED_DRIVER_ENABLE=yes` in `rules.mk`, e.g.:
+To enable the OLED feature, there are three steps. First, when compiling your keyboard, you'll need to add the following to your `rules.mk`:
 
-```
+```make
 OLED_DRIVER_ENABLE = yes
 ```
 
-This enables the feature and the `OLED_DRIVER_ENABLE` define. Then in your `keymap.c` file, you will need to implement the user task call, e.g:
+Then in your `keymap.c` file, implement the OLED task call. This example assumes your keymap has three layers named `_QWERTY`, `_FN` and `_ADJ`:
 
-```C++
+```c
 #ifdef OLED_DRIVER_ENABLE
 void oled_task_user(void) {
-  // Host Keyboard Layer Status
-  oled_write_P(PSTR("Layer: "), false);
-  switch (get_highest_layer(layer_state)) {
-    case _QWERTY:
-      oled_write_P(PSTR("Default\n"), false);
-      break;
-    case _FN:
-      oled_write_P(PSTR("FN\n"), false);
-      break;
-    case _ADJ:
-      oled_write_P(PSTR("ADJ\n"), false);
-      break;
-    default:
-      // Or use the write_ln shortcut over adding '\n' to the end of your string
-      oled_write_ln_P(PSTR("Undefined"), false);
-  }
+    // Host Keyboard Layer Status
+    oled_write_P(PSTR("Layer: "), false);
 
-  // Host Keyboard LED Status
-  uint8_t led_usb_state = host_keyboard_leds();
-  oled_write_P(led_usb_state & (1<<USB_LED_NUM_LOCK) ? PSTR("NUMLCK ") : PSTR("       "), false);
-  oled_write_P(led_usb_state & (1<<USB_LED_CAPS_LOCK) ? PSTR("CAPLCK ") : PSTR("       "), false);
-  oled_write_P(led_usb_state & (1<<USB_LED_SCROLL_LOCK) ? PSTR("SCRLCK ") : PSTR("       "), false);
+    switch (get_highest_layer(layer_state)) {
+        case _QWERTY:
+            oled_write_P(PSTR("Default\n"), false);
+            break;
+        case _FN:
+            oled_write_P(PSTR("FN\n"), false);
+            break;
+        case _ADJ:
+            oled_write_P(PSTR("ADJ\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
+    }
+
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
 }
 #endif
 ```
 
 ## Logo Example
 
-In the default font, ranges in the font file are reserved for a QMK Logo. To Render this logo to the oled screen, use the following code example:
+In the default font, certain ranges of characters are reserved for a QMK logo. To render this logo to the OLED screen, use the following code example:
 
-```C++
+```c
 static void render_logo(void) {
-  static const char PROGMEM qmk_logo[] = {
-    0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,0x90,0x91,0x92,0x93,0x94,
-    0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,0xb0,0xb1,0xb2,0xb3,0xb4,
-    0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,0xd2,0xd3,0xd4,0};
+    static const char PROGMEM qmk_logo[] = {
+        0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, 0x94,
+        0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3, 0xB4,
+        0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0x00
+    };
 
-  oled_write_P(qmk_logo, false);
+    oled_write_P(qmk_logo, false);
 }
 ```
 
 ## Other Examples
 
-In split keyboards, it is very common to have two OLED displays that each render different content and oriented flipped differently. You can do this by switching which content to render by using the return from `is_keyboard_master()` or `is_keyboard_left()` found in `split_util.h`, e.g:
+In split keyboards, it is very common to have two OLED displays that each render different content and are oriented or flipped differently. You can do this by switching which content to render by using the return value from `is_keyboard_master()` or `is_keyboard_left()` found in `split_util.h`, e.g:
 
-```C++
+```c
 #ifdef OLED_DRIVER_ENABLE
 oled_rotation_t oled_init_user(oled_rotation_t rotation) {
-  if (!is_keyboard_master())
-    return OLED_ROTATION_180;  // flips the display 180 degrees if offhand
-  return rotation;
+    if (!is_keyboard_master()) {
+        return OLED_ROTATION_180;  // flips the display 180 degrees if offhand
+    }
+
+    return rotation;
 }
 
 void oled_task_user(void) {
-  if (is_keyboard_master()) {
-    render_status();     // Renders the current keyboard state (layer, lock, caps, scroll, etc)
-  } else {
-    render_logo();       // Renders a statuc logo
-    oled_scroll_left();  // Turns on scrolling
-  }
+    if (is_keyboard_master()) {
+        render_status();  // Renders the current keyboard state (layer, lock, caps, scroll, etc)
+    } else {
+        render_logo();  // Renders a static logo
+        oled_scroll_left();  // Turns on scrolling
+    }
 }
 #endif
 ```
 
+## Basic Configuration
 
- ## Basic Configuration
-
-| Define                     | Default           | Description                                                                                                                |
-|----------------------------|-------------------|----------------------------------------------------------------------------------------------------------------------------|
-| `OLED_DISPLAY_ADDRESS`     | `0x3C`            | The i2c address of the OLED Display                                                                                        |
-| `OLED_FONT_H`              | `"glcdfont.c"`    | The font code file to use for custom fonts                                                                                 |
-| `OLED_FONT_START`          | `0`               | The starting characer index for custom fonts                                                                               |
-| `OLED_FONT_END`            | `224`             | The ending characer index for custom fonts                                                                                 |
-| `OLED_FONT_WIDTH`          | `6`               | The font width                                                                                                             |
-| `OLED_FONT_HEIGHT`         | `8`               | The font height (untested)                                                                                                 |
-| `OLED_TIMEOUT`             | `60000`           | Turns off the OLED screen after 60000ms of keyboard inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.            |
-| `OLED_SCROLL_TIMEOUT`      | `0`               | Scrolls the OLED screen after 0ms of OLED inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.                      |
-| `OLED_SCROLL_TIMEOUT_RIGHT`| *Not defined*     | Scroll timeout direction is right when defined, left when undefined.                                                       |
-| `OLED_IC`                  | `OLED_IC_SSD1306` | Set to `OLED_IC_SH1106` if you're using the SH1106 OLED controller.                                                        |
-| `OLED_COLUMN_OFFSET`       | `0`               | (SH1106 only.) Shift output to the right this many pixels.<br />Useful for 128x64 displays centered on a 132x64 SH1106 IC. |
+|Define                     |Default          |Description                                                                                                               |
+|---------------------------|-----------------|--------------------------------------------------------------------------------------------------------------------------|
+|`OLED_DISPLAY_ADDRESS`     |`0x3C`           |The i2c address of the OLED Display                                                                                       |
+|`OLED_FONT_H`              |`"glcdfont.c"`   |The font code file to use for custom fonts                                                                                |
+|`OLED_FONT_START`          |`0`              |The starting characer index for custom fonts                                                                              |
+|`OLED_FONT_END`            |`223`            |The ending characer index for custom fonts                                                                                |
+|`OLED_FONT_WIDTH`          |`6`              |The font width                                                                                                            |
+|`OLED_FONT_HEIGHT`         |`8`              |The font height (untested)                                                                                                |
+|`OLED_TIMEOUT`             |`60000`          |Turns off the OLED screen after 60000ms of keyboard inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.           |
+|`OLED_SCROLL_TIMEOUT`      |`0`              |Scrolls the OLED screen after 0ms of OLED inactivity. Helps reduce OLED Burn-in. Set to 0 to disable.                     |
+|`OLED_SCROLL_TIMEOUT_RIGHT`|*Not defined*    |Scroll timeout direction is right when defined, left when undefined.                                                      |
+|`OLED_IC`                  |`OLED_IC_SSD1306`|Set to `OLED_IC_SH1106` if you're using the SH1106 OLED controller.                                                       |
+|`OLED_COLUMN_OFFSET`       |`0`              |(SH1106 only.) Shift output to the right this many pixels.<br />Useful for 128x64 displays centered on a 132x64 SH1106 IC.|
 
  ## 128x64 & Custom sized OLED Displays
 
  The default display size for this feature is 128x32 and all necessary defines are precalculated with that in mind. We have added a define, `OLED_DISPLAY_128X64`, to switch all the values to be used in a 128x64 display, as well as added a custom define, `OLED_DISPLAY_CUSTOM`, that allows you to provide the necessary values to the driver.
 
-|Define                 |Default        |Description                                                      |
-|-----------------------|---------------|-----------------------------------------------------------------|
-|`OLED_DISPLAY_128X64`  |*Not defined*  |Changes the display defines for use with 128x64 displays.        |
-|`OLED_DISPLAY_CUSTOM`  |*Not defined*  |Changes the display defines for use with custom displays.<br />Requires user to implement the below defines. |
-|`OLED_DISPLAY_WIDTH`   |`128`          |The width of the OLED display.                                   |
-|`OLED_DISPLAY_HEIGHT`  |`32`           |The height of the OLED display.                                  |
-|`OLED_MATRIX_SIZE`     |`512`          |The local buffer size to allocate.<br />`(OLED_DISPLAY_HEIGHT / 8 * OLED_DISPLAY_WIDTH)`. |
-|`OLED_BLOCK_TYPE`      |`uint16_t`     |The unsigned integer type to use for dirty rendering. |
-|`OLED_BLOCK_COUNT`     |`16`           |The number of blocks the display is divided into for dirty rendering.<br />`(sizeof(OLED_BLOCK_TYPE) * 8)`. |
-|`OLED_BLOCK_SIZE`      |`32`           |The size of each block for dirty rendering<br />`(OLED_MATRIX_SIZE / OLED_BLOCK_COUNT)`. |
-|`OLED_COM_PINS`        |`COM_PINS_SEQ` |How the SSD1306 chip maps it's memory to display.<br />Options are `COM_PINS_SEQ`, `COM_PINS_ALT`, `COM_PINS_SEQ_LR`, & `COM_PINS_ALT_LR`. |
-|`OLED_SOURCE_MAP`      |`{ 0, ... N }` |Precalculated source array to use for mapping source buffer to target OLED memory in 90 degree rendering.         |
-|`OLED_TARGET_MAP`      |`{ 24, ... N }`|Precalculated target array to use for mapping source buffer to target OLED memory in 90 degree rendering.         |
+|Define               |Default        |Description                                                                                                                             |
+|---------------------|---------------|----------------------------------------------------------------------------------------------------------------------------------------|
+|`OLED_DISPLAY_128X64`|*Not defined*  |Changes the display defines for use with 128x64 displays.                                                                               |
+|`OLED_DISPLAY_CUSTOM`|*Not defined*  |Changes the display defines for use with custom displays.<br>Requires user to implement the below defines.                              |
+|`OLED_DISPLAY_WIDTH` |`128`          |The width of the OLED display.                                                                                                          |
+|`OLED_DISPLAY_HEIGHT`|`32`           |The height of the OLED display.                                                                                                         |
+|`OLED_MATRIX_SIZE`   |`512`          |The local buffer size to allocate.<br>`(OLED_DISPLAY_HEIGHT / 8 * OLED_DISPLAY_WIDTH)`.                                                 |
+|`OLED_BLOCK_TYPE`    |`uint16_t`     |The unsigned integer type to use for dirty rendering.                                                                                   |
+|`OLED_BLOCK_COUNT`   |`16`           |The number of blocks the display is divided into for dirty rendering.<br>`(sizeof(OLED_BLOCK_TYPE) * 8)`.                               |
+|`OLED_BLOCK_SIZE`    |`32`           |The size of each block for dirty rendering<br>`(OLED_MATRIX_SIZE / OLED_BLOCK_COUNT)`.                                                  |
+|`OLED_COM_PINS`      |`COM_PINS_SEQ` |How the SSD1306 chip maps it's memory to display.<br>Options are `COM_PINS_SEQ`, `COM_PINS_ALT`, `COM_PINS_SEQ_LR`, & `COM_PINS_ALT_LR`.|
+|`OLED_SOURCE_MAP`    |`{ 0, ... N }` |Precalculated source array to use for mapping source buffer to target OLED memory in 90 degree rendering.                               |
+|`OLED_TARGET_MAP`    |`{ 24, ... N }`|Precalculated target array to use for mapping source buffer to target OLED memory in 90 degree rendering.                               |
 
 
-### 90 Degree Rotation - Technical Mumbo Jumbo 
+### 90 Degree Rotation - Technical Mumbo Jumbo
 
 !> Rotation is unsupported on the SH1106.
 
-```C
+```c
 // OLED Rotation enum values are flags
 typedef enum {
     OLED_ROTATION_0   = 0,
@@ -143,9 +146,9 @@ typedef enum {
 } oled_rotation_t;
 ```
 
- OLED displays driven by SSD1306 drivers only natively support in hard ware 0 degree and 180 degree rendering. This feature is done in software and not free. Using this feature will increase the time to calculate what data to send over i2c to the OLED. If you are strapped for cycles, this can cause keycodes to not register. In testing however, the rendering time on an `atmega32u4` board only went from 2ms to 5ms and keycodes not registering was only noticed once we hit 15ms. 
- 
- 90 Degree Rotated Rendering is achieved by using bitwise operations to rotate each 8 block of memory and uses two precalculated arrays to remap buffer memory to OLED memory. The memory map defines are precalculated for remap performance and are calculated based on the OLED Height, Width, and Block Size. For example, in the 128x32 implementation with a `uint8_t` block type, we have a 64 byte block size. This gives us eight 8 byte blocks that need to be rotated and rendered. The OLED renders horizontally two 8 byte blocks before moving down a page, e.g:
+OLED displays driven by SSD1306 drivers only natively support in hardware 0 degree and 180 degree rendering. This feature is done in software and not free. Using this feature will increase the time to calculate what data to send over i2c to the OLED. If you are strapped for cycles, this can cause keycodes to not register. In testing however, the rendering time on an ATmega32U4 board only went from 2ms to 5ms and keycodes not registering was only noticed once we hit 15ms.
+
+90 degree rotation is achieved by using bitwise operations to rotate each 8 block of memory and uses two precalculated arrays to remap buffer memory to OLED memory. The memory map defines are precalculated for remap performance and are calculated based on the display height, width, and block size. For example, in the 128x32 implementation with a `uint8_t` block type, we have a 64 byte block size. This gives us eight 8 byte blocks that need to be rotated and rendered. The OLED renders horizontally two 8 byte blocks before moving down a page, e.g:
 
 |   |   |   |   |   |   |
 |---|---|---|---|---|---|
@@ -167,8 +170,8 @@ So those precalculated arrays just index the memory offsets in the order in whic
 
 ## OLED API
 
-```C++
-// OLED Rotation enum values are flags
+```c
+// OLED rotation enum values are flags
 typedef enum {
     OLED_ROTATION_0   = 0,
     OLED_ROTATION_90  = 1,
@@ -272,26 +275,26 @@ uint8_t oled_max_lines(void);
 
 !> Scrolling and rotation are unsupported on the SH1106.
 
-## SSD1306.h driver conversion guide
+## SSD1306.h Driver Conversion Guide
 
-|Old API                    |Recommended New API                |
-|---------------------------|-----------------------------------|
-|`struct CharacterMatrix`   |*removed - delete all references*  |
-|`iota_gfx_init`            |`oled_init`                        |
-|`iota_gfx_on`              |`oled_on`                          |
-|`iota_gfx_off`             |`oled_off`                         |
-|`iota_gfx_flush`           |`oled_render`                      |
-|`iota_gfx_write_char`      |`oled_write_char`                  |
-|`iota_gfx_write`           |`oled_write`                       |
-|`iota_gfx_write_P`         |`oled_write_P`                     |
-|`iota_gfx_clear_screen`    |`oled_clear`                       |
-|`matrix_clear`             |*removed - delete all references*  |
-|`matrix_write_char_inner`  |`oled_write_char`                  |
-|`matrix_write_char`        |`oled_write_char`                  |
-|`matrix_write`             |`oled_write`                       |
-|`matrix_write_ln`          |`oled_write_ln`                    |
-|`matrix_write_P`           |`oled_write_P`                     |
-|`matrix_write_ln_P`        |`oled_write_ln_P`                  |
-|`matrix_render`            |`oled_render`                      |
-|`iota_gfx_task`            |`oled_task`                        |
-|`iota_gfx_task_user`       |`oled_task_user`                   |
+|Old API                  |Recommended New API              |
+|-------------------------|---------------------------------|
+|`struct CharacterMatrix` |*removed - delete all references*|
+|`iota_gfx_init`          |`oled_init`                      |
+|`iota_gfx_on`            |`oled_on`                        |
+|`iota_gfx_off`           |`oled_off`                       |
+|`iota_gfx_flush`         |`oled_render`                    |
+|`iota_gfx_write_char`    |`oled_write_char`                |
+|`iota_gfx_write`         |`oled_write`                     |
+|`iota_gfx_write_P`       |`oled_write_P`                   |
+|`iota_gfx_clear_screen`  |`oled_clear`                     |
+|`matrix_clear`           |*removed - delete all references*|
+|`matrix_write_char_inner`|`oled_write_char`                |
+|`matrix_write_char`      |`oled_write_char`                |
+|`matrix_write`           |`oled_write`                     |
+|`matrix_write_ln`        |`oled_write_ln`                  |
+|`matrix_write_P`         |`oled_write_P`                   |
+|`matrix_write_ln_P`      |`oled_write_ln_P`                |
+|`matrix_render`          |`oled_render`                    |
+|`iota_gfx_task`          |`oled_task`                      |
+|`iota_gfx_task_user`     |`oled_task_user`                 |

docs/feature_rgb_matrix.md

@@ -199,6 +199,7 @@ enum rgb_matrix_effects {
     RGB_MATRIX_SOLID_COLOR = 1,     // Static single hue, no speed support
     RGB_MATRIX_ALPHAS_MODS,         // Static dual hue, speed is hue for secondary hue
     RGB_MATRIX_GRADIENT_UP_DOWN,    // Static gradient top to bottom, speed controls how much gradient changes
+    RGB_MATRIX_GRADIENT_LEFT_RIGHT,    // Static gradient left to right, speed controls how much gradient changes
     RGB_MATRIX_BREATHING,           // Single hue brightness cycling animation
     RGB_MATRIX_BAND_SAT,        // Single hue band fading saturation scrolling left to right
     RGB_MATRIX_BAND_VAL,        // Single hue band fading brightness scrolling left to right
@@ -379,6 +380,10 @@ These are defined in [`rgblight_list.h`](https://github.com/qmk/qmk_firmware/blo
 #define RGB_MATRIX_LED_FLUSH_LIMIT 16 // limits in milliseconds how frequently an animation will update the LEDs. 16 (16ms) is equivalent to limiting to 60fps (increases keyboard responsiveness)
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200 // limits maximum brightness of LEDs to 200 out of 255. If not defined maximum brightness is set to 255
 #define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT // Sets the default mode, if none has been set
+#define RGB_MATRIX_STARTUP_HUE 0 // Sets the default hue value, if none has been set
+#define RGB_MATRIX_STARTUP_SAT 255 // Sets the default saturation value, if none has been set
+#define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS // Sets the default brightness value, if none has been set
+#define RGB_MATRIX_STARTUP_SPD 127 // Sets the default animation speed, if none has been set
 ```
 
 ## EEPROM storage

docs/feature_split_keyboard.md

@@ -198,10 +198,15 @@ This option changes the startup behavior to detect an active USB connection when
 ?> This setting will stop the ability to demo using battery packs.
 
 ```c
-#define SPLIT_USB_TIMEOUT 2500
+#define SPLIT_USB_TIMEOUT 2000
 ```
 This sets the maximum timeout when detecting master/slave when using `SPLIT_USB_DETECT`.
 
+```c
+#define SPLIT_USB_TIMEOUT_POLL 10
+```
+This sets the poll frequency when detecting master/slave when using `SPLIT_USB_DETECT`
+
 ## Additional Resources
 
 Nicinabox has a [very nice and detailed guide](https://github.com/nicinabox/lets-split-guide) for the Let's Split keyboard, that covers most everything you need to know, including troubleshooting information. 

docs/feature_unicode.md

@@ -193,12 +193,23 @@ By default, when the keyboard boots, it will initialize the input mode to the la
 
 !> Using `UNICODE_SELECTED_MODES` means you don't have to initially set the input mode in `matrix_init_user()` (or a similar function); the Unicode system will do that for you on startup. This has the added benefit of avoiding unnecessary writes to EEPROM.
 
-## `send_unicode_hex_string`
+## `send_unicode_string()`
 
-To type multiple characters for things like (ノಠ痊ಠ)ノ彡┻━┻, you can use `send_unicode_hex_string()` much like `SEND_STRING()` except you would use hex values separate by spaces.
-For example, the table flip seen above would be `send_unicode_hex_string("0028 30CE 0CA0 75CA 0CA0 0029 30CE 5F61 253B 2501 253B")`
+This function is much like `send_string()` but allows you to input UTF-8 characters directly, and supports all code points (provided the selected input method also supports it). Make sure your `keymap.c` is formatted in UTF-8 encoding.
 
-There are many ways to get a hex code, but an easy one is [this site](https://r12a.github.io/app-conversion/). Just make sure to convert to hexadecimal, and that is your string.
+```c
+send_unicode_string("(ノಠ痊ಠ)ノ彡┻━┻");
+```
+
+## `send_unicode_hex_string()`
+
+Similar to `send_unicode_string()`, but the characters are represented by their code point values in ASCII, separated by spaces. For example, the table flip above would be achieved with:
+
+```c
+send_unicode_hex_string("0028 30CE 0CA0 75CA 0CA0 0029 30CE 5F61 253B 2501 253B");
+```
+
+An easy way to convert your Unicode string to this format is by using [this site](https://r12a.github.io/app-conversion/), and taking the result in the "Hex/UTF-32" section.
 
 ## Additional Language Support
 
@@ -228,6 +239,6 @@ AutoHotkey inserts the Text right of `Send, ` when this combination is pressed.
 
 If you enable the US International layout on the system, it will use punctuation to accent the characters.
 
-For instance, typing "`a" will result in à.
+For instance, typing "\`a" will result in à.
 
 You can find details on how to enable this [here](https://support.microsoft.com/en-us/help/17424/windows-change-keyboard-layout).

docs/getting_started_build_tools.md

@@ -43,7 +43,7 @@ Debian / Ubuntu example:
 Fedora / Red Hat example:
 
     sudo dnf install gcc unzip wget zip dfu-util dfu-programmer avr-gcc avr-libc binutils-avr32-linux-gnu arm-none-eabi-gcc-cs arm-none-eabi-binutils-cs arm-none-eabi-newlib
-    
+
 Arch / Manjaro example:
 
     pacman -S base-devel gcc unzip wget zip avr-gcc avr-binutils avr-libc dfu-util arm-none-eabi-gcc arm-none-eabi-binutils arm-none-eabi-newlib git dfu-programmer dfu-util
@@ -57,16 +57,17 @@ By default, this will download compilers for both AVR and ARM. If you don't need
     nix-shell --arg arm false
 
 ## macOS
-If you're using [homebrew,](http://brew.sh/) you can use the following commands:
+If you're using [Homebrew](http://brew.sh/), you can use the following commands:
 
     brew tap osx-cross/avr
-    brew tap PX4/homebrew-px4
+    brew tap osx-cross/arm
     brew update
     brew install avr-gcc@8
     brew link --force avr-gcc@8
     brew install dfu-programmer
     brew install dfu-util
-    brew install gcc-arm-none-eabi
+    brew install arm-gcc-bin@8
+    brew link --force arm-gcc-bin@8
     brew install avrdude
 
 This is the recommended method. If you don't have homebrew, [install it!](http://brew.sh/) It's very much worth it for anyone who works in the command line. Note that the `make` and `make install` portion during the homebrew installation of `avr-gcc@8` can take over 20 minutes and exhibit high CPU usage.
@@ -119,12 +120,12 @@ If this is a bit complex for you, Docker might be the turnkey solution you need.
 util/docker_build.sh keyboard:keymap
 # For example: util/docker_build.sh ergodox_ez:steno
 ```
-This will compile the desired keyboard/keymap and leave the resulting `.hex` or `.bin` file in the QMK directory for you to flash. If `:keymap` is omitted, the `default` keymap is used. Note that the parameter format is the same as when building with `make`.
+This will compile the desired keyboard/keymap and leave the resulting `.hex` or `.bin` file in the QMK directory for you to flash. If `:keymap` is omitted, all keymaps are used. Note that the parameter format is the same as when building with `make`.
 
 You can also start the script without any parameters, in which case it will ask you to input the build parameters one by one, which you may find easier to use:
 ```bash
 util/docker_build.sh
-# Reads parameters as input (leave blank for defaults)
+# Reads parameters as input (leave blank for all keyboards/keymaps)
 ```
 
 There is also support for building _and_ flashing the keyboard straight from Docker by specifying the `target` as well:

docs/getting_started_make_guide.md

@@ -135,7 +135,7 @@ As there is no standard split communication driver for ARM-based split keyboards
 
 `CUSTOM_MATRIX`
 
-Lets you replace the default matrix scanning routine with your own code. You will need to provide your own implementations of matrix_init() and matrix_scan().
+Lets you replace the default matrix scanning routine with your own code. For further details, see the [Custom Matrix page](custom_matrix.md).
 
 `DEBOUNCE_TYPE`
 

docs/hardware_drivers.md

@@ -33,3 +33,7 @@ Support for up to 2 drivers. Each driver impliments 2 charlieplex matrices to in
 ## IS31FL3733
 
 Support for up to a single driver with room for expansion. Each driver can control 192 individual LEDs or 64 RGB LEDs. For more information on how to setup the driver see the [RGB Matrix](feature_rgb_matrix.md) page.
+
+## 24xx series external I2C EEPROM
+
+Support for an external I2C-based EEPROM instead of using the on-chip EEPROM. For more information on how to setup the driver see the [EEPROM Driver](eeprom_driver.md) page.