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76 lines
4.1 KiB
Markdown
76 lines
4.1 KiB
Markdown
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# QMK Breaking Change - 2020 Feb 29 Changelog
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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.
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## Update ChibiOS/ChibiOS-Contrib/uGFX submodules
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* General Notes
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* A `make git-submodule` may be required after pulling the latest QMK firmware code to update affected submodules to the upgraded revisions
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* Enabling link-time-optimization (`LINK_TIME_OPTIMIZATION_ENABLE = yes`) should work on a lot more boards
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* Upgrade to ChibiOS ver19.1.3
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* This will allow QMK to update to upstream ChibiOS a lot easier -- the old version was ~2 years out of date.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.
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* Includes improved MCU support and bugfixes
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* ChibiOS revision is now included in Command output
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* Timers should now be more accurate
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* Upgrade to newer ChibiOS-Contrib
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* Also includes improved MCU support and bugfixes
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* ChibiOS-Contrib revision is now included in Command output
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* Upgrade to newer uGFX
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* Required in order to support updated ChibiOS
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## Fix ChibiOS timer overflow for 16-bit SysTick devices
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* On 16-bit SysTick devices, the timer subsystem in QMK was incorrectly dealing with overflow.
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* When running at a 100000 SysTick frequency (possible on 16-bit devices, but uncommon), this overflow would occur after 0.65 seconds.
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* Timers are now correctly handling this overflow case and timing should now be correct on ChibiOS/ARM.
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## Update LUFA submodule
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* Updates the LUFA submodule to include updates from upstream (abcminiuser/lufa)
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* Includes some cleanup for QMK DFU generation
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## Encoder flip
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* Flips the encoder direction so that `clockwise == true` is for actually turning the knob clockwise
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* Adds `ENCODER_DIRECTION_FLIP` define, so that reversing the expected dirction is simple for users.
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* Cleans up documentation page for encoders
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## Adding support for `BACKLIGHT_ON_STATE` for hardware PWM backlight
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* Previously, the define only affected software PWM, and hardware PWM always assumed an N-channel MOSFET.
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* The hardware PWM backlight setup has been updated to respect this option.
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* 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.
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## Migrating `ACTION_LAYER_TAP_KEY()` entries in `fn_actions` to `LT()` keycodes
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* `fn_actions` is deprecated, and its functionality has been superseded by direct keycodes and `process_record_user()`
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* The end result of removing this obsolete feature should result in a decent reduction in firmware size and code complexity
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* 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
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## Moving backlight keycode handling to `process_keycode/`
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* This refactors the backlight keycode logic to be clearer and more modular.
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* All backlight-related keycodes are now actioned in a single file.
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* 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.
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## Refactor Planck keymaps to use Layout Macros
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* Refactor Planck keymaps to use layout macros instead of raw matrix assignments
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* Makes keymaps revision-agnostic
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* Should reduce noise and errors in Travis CI logs
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## GON NerD codebase refactor
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* Splits the codebase for GON NerD 60 and NerdD TKL PCBs into two separate directories.
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* If your keymap is for a NerD 60 PCB, your `make` command is now `make gon/nerd60:<keymap>`.
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* If your keymap is for a NerD TKL PCB, your `make` command is now `make gon/nerdtkl:<keymap>`.
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