* Fixup massdrop/alt.

* Fixup `cest73/tkm` bootmagic lite.

* Update keyboards/cest73/tkm/rules.mk

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* remove keyboard-level instances of `MIDI_ENABLE = no`

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e  '/^[ #]*MIDI_ENABLE[ \t]*=[ \t]*no/d' {} +
```

Co-Authored-By: Nick Brassel <nick@tzarc.org>

* fix case-sensitivity issues on MIDI_ENABLE

Change instances of `MIDI_ENABLE = YES` to `MIDI_ENABLE = yes`.

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;MIDI_ENABLE[ \t]*=[ \t]*[Yy][Ee][Ss];MIDI_ENABLE = yes;g' {} +
```

* replace `# MIDI controls` with `# MIDI support`

Replace `# MIDI controls` with `# MIDI support` in keyboard-level `rules.mk` files.

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;#[ \t]*MIDI[ \t]*\(controls\|support\).*;# MIDI support;g' {} +
```

* align inline comments

Aligns the inline comments to the length used by the QMK AVR rules.mk template.

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;MIDI_ENABLE *= *yes.*;MIDI_ENABLE = yes           # MIDI support;g'  {} +
```

* remove commented instances of `MIDI_ENABLE` from keyboard `rules.mk` files

Commands:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;#\([ \t]*MIDI_ENABLE\) = yes; \1 = no ;' {} +
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;^\([ \t]*\)\(MIDI_ENABLE = no\);\2\1;' {} +
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e '/^[ #]\+MIDI_ENABLE *= *no/d' {} +
```

* remove MIDI configuration boilerplate from keyboard config.h files

Co-authored-by: Nick Brassel <nick@tzarc.org>

* disambiguate Bootmagic rules in keymaps

The files edited by this commit were added at a point in time where `BOOTMAGIC_ENABLE = yes` enabled full Bootmagic.

This commit edits the files to specify that full Bootmagic is intended.

* remove BOOTMAGIC_ENABLE=full setting

* unify commented BOOTMAGIC_ENABLE rules in keyboards

Explicitly sets `BOOTMAGIC_ENABLE = no` in keyboards where the rule was commented out.

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;#[ \t]*\(BOOTMAGIC_ENABLE\)[ \t=]\+\([a-zA-Z]\+\).*;\1 = no       # Virtual DIP switch configuration;g' {} +
```

* remove commented Bootmagic rules from keymap/user level

Command:

```
find keyboards/ layouts/ users/ -type f -name 'rules.mk' -exec sed -i -e '/#.*\(BOOTMAGIC_ENABLE\)[ \t=]\+\([a-z]\+\).*/d' {} +
```

* update keyboard BOOTMAGIC_ENABLE rule formatting

Sets the formatting of BOOTMAGIC_ENABLE rules to `BOOTMAGIC_ENABLE = [value]`, without the inline comments (which will be replaced later).

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE\)[ \t=]\+\([a-z]\+\).*;\1 = \2;g' '{}' +
```

* update keyboards' BOOTMAGIC_ENABLE settings

Updates keyboard `rules.mk` files to use `BOOTMAGIC_ENABLE = lite` where `BOOTMAGIC_ENABLE = full` was being used.

Command:

```
find keyboards/ -type f -name 'rules.mk' -and -not -path '*/keymaps/*' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE = \)full;\1lite;g' '{}' +
```

* update keymap/user BOOTMAGIC_ENABLE settings

Updates keymap/user `rules.mk` files to use `BOOTMAGIC_ENABLE = lite` where `BOOTMAGIC_ENABLE = full` was being used.

Commands:

```
find keyboards/ -type f -name 'rules.mk' -and -path '*/keymaps/*' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE[ \t=]\+\)full;\1lite;g' '{}' +
find layouts/community/ users/ -type f -name 'rules.mk' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE[ \t=]\+\)full;\1lite;g' '{}' +
```

* remove and replace inline comments in keyboards and keymap/user files

Removes and replaces the inline comments, which have been updated to read `Enable Bootmagic Lite`.

Commands:

```
find keyboards/ -type f -name 'rules.mk' -and -path '*/keymaps/*' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE\)[ \t=]\+\([a-z]\+\).*;\1 = \2;g' '{}' +
find layouts/community/ users/ -type f -name 'rules.mk' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE\)[ \t=]\+\([a-z]\+\).*;\1 = \2;g' '{}' +
find keyboards/ layouts/community/ users/ -type f -name 'rules.mk' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE = lite\);\1     # Enable Bootmagic Lite;g' '{}' +
find keyboards/ layouts/community/ users/ -type f -name 'rules.mk' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE = yes\);\1      # Enable Bootmagic Lite;g' '{}' +
find keyboards/ layouts/community/ users/ -type f -name 'rules.mk' -exec sed -i -e 's;\(BOOTMAGIC_ENABLE = no\);\1       # Enable Bootmagic Lite;g' '{}' +
```

* rename improperly named makefiles

Some files intended to be used as makefiles had improper names causing them to not be used as intended when building.

This commit corrects the filenames of the affected files.

* update renamed file with new rule formatting

* update QMK's template files

Updates QMK's `rules.mk` templates to use the new inline comment.

* update QMK Docs

- remove documentation of full Bootmagic
- update links to Bootmagic Lite doc
- add doc for Magic Keycodes

* rules.mk patch for coarse/ixora and coarse/vinta

* Implement GPIO abstraction for atsam

* Convert Drop boards to normal matrix config

* Work round pin conflicts and matrix delay

* [Keymap] merge jdelkins userspace and associated keymaps

* Add copyright & license info

* Change rgblight_config.enable to rgblight_is_enabled()

* Update keyboards/dz60/keymaps/jdelkins/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/dz60/keymaps/jdelkins/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/dz60/keymaps/jdelkins/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Remove superfluous includes

* Change EXTRAFLAGS+=-flto to LTO_ENABLE=yes

* Remove unnecessary jdelkins_ss symlink in users

* Add copyright and license notices

* Use preferred way to determine capslock / numlock state

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Add #pragma once to a header

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Include QMK_KEYBOARD_H only once, in userspace header

* Remove unnecessary initialization in matrix_init_keymap

* Do process_record_keymap before cases handled in process_record_user

* Reorganize & simplify secrets feature enablement

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove superfluous break

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove copyright from rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove copyright from rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* include "print.h" instead of <print.h>

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_cod16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove copyright from rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* add #pragma once to a header

Co-authored-by: Ryan <fauxpark@gmail.com>

* include "print.h" instead of <print.h>

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove copyright from rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove copyright from rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove copyright from rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use tap_code16

Co-authored-by: Ryan <fauxpark@gmail.com>

* Use :flash target where possible

* Remove special case flash target and use PROGRAM_CMD

* dz60/jdelkins_ss: use tap_code16

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

* add massdrop/alt/hlmtre keymap, add .exe to gitignore

* changes request in PR (license header and fix gitignore)

Co-authored-by: Matt Weller <matthew.weller@nvih.org>

* added urbanvanilla keymap

Urbanvanilla's keymap for massdrop/alt keyboard
adds in an idle timer to turn off RGB after set amount of time.
poor unsuccessful attempt at replicating a velocikey like functionality.
Grave escape is enabled on ESC.

* Update readme.md

* updating documentation

* Create readme.md

* restoring default documentation

* update with review changes implemented

removed unnecessary lines and files.
increased wait_us() parameter to 40 as was still getting chatter at 20.
removed some code for the terrible rudimentary attempt at velocikey for rgb matrix

* Update matrix.c

* Revert "Merge pull request #3 from urbanvanilla/dev_branch"

This reverts commit deb55d797a, reversing
changes made to ba8817356f.

* Update keymap.c

* added urbanvanilla keymap

Urbanvanilla's keymap for massdrop/alt keyboard
adds in an idle timer to turn off RGB after set amount of time.
poor unsuccessful attempt at replicating a velocikey like functionality.
Grave escape is enabled on ESC.

* Update readme.md

* updating documentation

* Create readme.md

* restoring default documentation

* update with review changes implemented

removed unnecessary lines and files.
increased wait_us() parameter to 40 as was still getting chatter at 20.
removed some code for the terrible rudimentary attempt at velocikey for rgb matrix

* Update matrix.c

* Revert "Merge pull request #3 from urbanvanilla/dev_branch"

This reverts commit deb55d797a, reversing
changes made to ba8817356f.

* Delete matrix.c

* Update keyboards/massdrop/alt/keymaps/urbanvanilla/config.h

Co-authored-by: Joel Challis <git@zvecr.com>

* Update keymap.c

* Update keymap.c

* Update keyboards/massdrop/alt/keymaps/urbanvanilla/keymap.c

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove MATRIX_IS_ON macro

this macro is both incorrect and excessive given that macro_is_on()
exists

* Remove massdrop matrix.h

* Split dmac_desc declaration and definition

According to the official documentation[1] gcc 10 is more strict about
correct extern usage.

I've had to move the definition of dmac_desc and dmac_desc_wb from
i2c_master.h to the corresponding .c file. This could be an issue if
anyone includes the i2c_master.h file without liking with the object
file.

[1]: https://gcc.gnu.org/gcc-10/porting_to.html

* Remove the keymap_config definition from keymaps

The keymap_config def was conflicting with the one found in
tmk_core/common/magic.c. Declaring it extern in magic.c breaks a bunch
of keyboard that rely on that declaration (like the ergodox). Instead
I've removed the one found in the keymap.c of the massdrop alt.

The same change will have to be made to other keyboards.

* Branch point for 2020 November 28 Breaking Change                                                

* Remove matrix_col_t to allow MATRIX_ROWS > 32 (#10183)                                           

* Add support for soft serial to ATmega32U2 (#10204)                                               

* Change MIDI velocity implementation to allow direct control of velocity value (#9940)            

* Add ability to build a subset of all keyboards based on platform.                                

* Actually use eeprom_driver_init().                                                               

* Make bootloader_jump weak for ChibiOS. (#10417)                                                  

* Joystick 16-bit support (#10439)                                                                 

* Per-encoder resolutions (#10259)                                                                 

* Share button state from mousekey to pointing_device (#10179)                                     

* Add hotfix for chibios keyboards not wake (#10088)                                               

* Add advanced/efficient RGB Matrix Indicators (#8564)                                             

* Naming change.                                                                                   

* Support for STM32 GPIOF,G,H,I,J,K (#10206)                                                       

* Add milc as a dependency and remove the installed milc (#10563)                                  

* ChibiOS upgrade: early init conversions (#10214)                                                 

* ChibiOS upgrade: configuration file migrator (#9952)                                             

* Haptic and solenoid cleanup (#9700)                                                              

* XD75 cleanup (#10524)                                                                            

* OLED display update interval support (#10388)                                                    

* Add definition based on currently-selected serial driver. (#10716)                               

* New feature: Retro Tapping per key (#10622)                                                      

* Allow for modification of output RGB values when using rgblight/rgb_matrix. (#10638)             

* Add housekeeping task callbacks so that keyboards/keymaps are capable of executing code for each main loop iteration. (#10530)

* Rescale both ChibiOS and AVR backlighting.                                                       

* Reduce Helix keyboard build variation (#8669)                                                    

* Minor change to behavior allowing display updates to continue between task ticks (#10750)        

* Some GPIO manipulations in matrix.c change to atomic. (#10491)                                   

* qmk cformat (#10767)                                                                             

* [Keyboard] Update the Speedo firmware for v3.0 (#10657)                                          

* Maartenwut/Maarten namechange to evyd13/Evy (#10274)                                             

* [quantum] combine repeated lines of code (#10837)                                                

* Add step sequencer feature (#9703)                                                               

* aeboards/ext65 refactor (#10820)                                                                 

* Refactor xelus/dawn60 for Rev2 later (#10584)                                                    

* add DEBUG_MATRIX_SCAN_RATE_ENABLE to common_features.mk (#10824)                                 

* [Core] Added `add_oneshot_mods` & `del_oneshot_mods` (#10549)                                    

* update chibios os usb for the otg driver (#8893)                                                 

* Remove HD44780 References, Part 4 (#10735)                                                       

* [Keyboard] Add Valor FRL TKL (+refactor) (#10512)                                                

* Fix cursor position bug in oled_write_raw functions (#10800)                                     

* Fixup version.h writing when using SKIP_VERSION=yes (#10972)                                     

* Allow for certain code in the codebase assuming length of string. (#10974)                       

* Add AT90USB support for serial.c (#10706)                                                        

* Auto shift: support repeats and early registration (#9826)                                       

* Rename ledmatrix.h to match .c file (#7949)                                                      

* Split RGB_MATRIX_ENABLE into _ENABLE and _DRIVER (#10231)                                        

* Split LED_MATRIX_ENABLE into _ENABLE and _DRIVER (#10840)                                        

* Merge point for 2020 Nov 28 Breaking Change

Pulled some functionality from the endgame keymap for the Drop Ctrl.

* very shortened version of the Endgame keymap

* fixed pictures

* fixed link

* fixed link

* fix files

* add GREEN RGB

* fixed GREEN RGB

* not supposed to be in my fork...

* wasn't supposed to be in my fork.

* I have fixed the layer 0 RGB Settings; you can now apply layer using "COLOR" in the layout template.

* I've renamed to pregame, fixed several files

* added Underglow RGB layout, changed def
ault RGB color

* fixed the color of the default profile like i want it

* Added IRL Photo

* Update keymap.c

disabled debugging.

* Update keymap.c

* Update config.h

* Update README.md

* Update keymap.h

* Changed some settings on rules for clean up.

* Changed some settings on rules for clean up.

* fixed some errors, cleaned things up

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Fixed changes recommended by Fauxpark

* Added changes recommended by fauxpark

* trying to fix my repo

* Still trying to fix merge issues

* changed to lowercase

* Delete reading.md

* Trying to rebase my repo

* stuck in rebase loop trying to fix local files and update

* updating readme file

* Update massdrop/alt keyboard to fix Caps Lock LED flickering.

* Fix Caps-lock LED during underglow-only for massdrop/ctrl

* Update keyboards/massdrop/ctrl/keymaps/default/keymap.c

* docs(massdrop alt): update link to loader releases

Update the link to the Massdrop Loader releases page to point to the releases index rather than release 0.0.1

* docs(massdrop ctrl): update link to loader releases

The default keymaps don't make use of the global `keymap_config` 
variable nor the `matrix_*_user()` functions.  Therefore, remove them to
avoid confusion for future keymap authors.

* New custom 'super alt' keymap for the Drop ALT

* Improvements to 'super alt' keymap based on PR feedback

* Fix flickering LED caps lock bug

* Code cleanup from PR feedback

* Minor keymap layout cleanup

amended to remove a couple of unnecessary lines,
thanks to @zvecr and @fauxpark

* Add short alias for `MAGIC_TOGGLE_NKRO`

* Add aliases for the other Bootmagic keycodes

* Replace long form in default keymaps

* Added Xulkal ALT Keymap

* Hadron compile fix

* Keymap fix

Features:

* Tap space for space, hold for cmd
* Tap caps lock for esc, hold for ctrl
* Dedicated key for entering default mode of yabai window manager
* Who needs arrow keys, anyways???
* Method for clearing all stuck-down mods

* e6.5 actually already had a 65_ansi_blocker LAYOUT macro, so just had to enable in rules.

* Add the 65_ansi_blocker LAYOUT macro and enable in rules.mk

* rename LAYOUT macro in .h and in the keymap.c as it was only a default keymap. Also enable in rules.mk

* rename but also had to define the existing LAYOUT macro as the new one to prevent breakage of existing keymaps

* add 65_ansi_blocker support for vinta

* forgot to update the info.json on these

* add new default layout 65_ansi_blocker support to alt

* add 65_ansi_blocker support

* undo changes

* Added new bonta keymap.

* Added a note.

* Made map more mac like.

* Initial conversion of the rgb_led struct

* Converting last keyboard & updating effects to take advantage of the new structure

* New struct should not be const

* Updated docs

* Changing define ___ for no led to NO_LED

* Missed converting some keymap usages of the old struct layout

Updated effects to test led flags
Updated massdrop to use new flags field for led toggle

* port Massdrop CTRL/ALT to use RGB Matrix

Co-authored-by: Matt Schneeberger <helluvamatt@gmail.com>

* Massdrop lighting support working

This commit is to get the Massdrop lighting code working again through use of the compilation define USE_MASSDROP_CONFIGURATOR added to a keymap's rules.mk.
Added keymaps for both CTRL and ALT named default_md and mac_md. These should be used if the Massdrop style lighting is desired.

* Updating config based on testing results with patrickmt & compile errors

* Updates for PR5328

For CTRL and ALT:
Moved location of new RGB Matrix macros from config_led.h to config.h.
Added RGB_MATRIX_LED_FLUSH_LIMIT (time between flushes) to config.h for correct LED driver update timing.
Re-added missing breathing code for when Massdrop configurator mode is defined.

* remove prilik keymap form PR

* Remove unnecessary IS_COMMAND definition in clueboard/66/rev4

* Replace keyboard_report->mods with get_mods() in IS_COMMAND definitions

* Update docs to use get_mods() instead of keyboard_report->mods

* Replace keyboard_report->mods with get_mods() in tmk_core/protocol/usb_hid/test

For some reason, this occurrence used KB_LSHIFT and KB_RSHIFT, which don't exist

* Replace keyboard_report->mods with get_mods() in Massdrop keyboards (as per @patrickmt)

* Add default value for IS_COMMAND for COMMAND feature

* Cleanup and consistency

* Update Templates to reflect change

* Fix IS_COMMAND in template

* Fix IS_COMMAND define

* Use consistent IS_COMMAND block in templates

* Remove unnecessary `#undef IS_COMMAND` directives

* Fix compile issue on orthodox

* Reomve IS_COMMAND option for newer boards

* Remove all existing definitions of IS_COMMAND if they use default LSHIFT and RSHIFT setting

* Remove a couple of additional IS_COMMAND defines

* Remove remaining redundant IS_COMMAND definitions

* Remove #undef IS_COMMAND from orthodox:drashna and whitefox:konstantin

* Remove multiple empty lines in modified config.h files

* Update additional boards

* Reomve IS_COMMAND from newer boards

* Update Alice keyboard

* Remove IS_COMMAND from additional boards

Jan 24th edition

Microsecond (us) delays are now handled by a busy wait loop according to MCU frequency. This replaces the system counter method which had an overhead of around 12us.
TC5 device and supporting routines removed as it was the old us delay counter.
wait_ms is now properly a macro to CLK_delay_ms.
wait_us is now properly a macro to CLK_delay_us.
Removed CLK_get_us as it has no use.
All calls to CLK_get_ms() have been replaced by timer_read64() with corrected typing.
All calls to CLK_delay_ms() have been replaced by wait_ms().
All calls to CLK_delay_us() have been replaced by wait_us() and timings verified or updated as needed after review on scope.
Corrected typing of variables using 64bit ms timer readings if needed.

MCU Pins for debugging, LED, boot tracing, and shift registers are now configurable at keyboard level.
Macros led_* replaced by DBG_LED_*
Macros m15_* replaced by DBG_1_*
Macros m27_* replaced by DBG_2_*
Macros m28_* replaced by DBG_3_*
For CTRL and ALT keyboards, debug boot tracing pin default now set to pad M27 instead of M28 since although M28 is not being used, it is technically a signal for USB port detection.
m15_print(...) renamed to dbg_print(...) to get away from hard coded port names.
dbg_print function now follows similar pattern to debug led output.

* Added abishalom keymaps

Added personal keymaps for Massdrop Alt and Tada68

* Update keyboards/tada68/keymaps/abishalom/rules.mk

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/rules.mk

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/config.h

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/keymap.c

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/keymap.c

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/rules.mk

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/keymap.c

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update keyboards/tada68/keymaps/abishalom/keymap.c

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Updated keymaps

* Bugfix Tada68

* Update keyboards/tada68/keymaps/abishalom/keymap.c

Co-Authored-By: abishalom <abishalom1997@gmail.com>

* Update for SEND_STRING usage

Update for SEND_STRING usage.
Sending keyboard reports (kbd, nkro) now obey the minimum polling time.
While attempting to send a keyboard report and waiting for a USB poll, other functions of the keyboard, including LED effects and power management, will continue to operate at their intended intervals.

* Updates for send string, syscalls, stdio, debug prints, auto shift

Now properly waiting for previous keys sent over USB to complete before sending new.
Added heap to linker and now compiling with syscalls support.
Removed custom string functions and now using stdio.
dprintf now works as intended through virtser device.

* CTRL and ALT keymap updates

CTRL mac keymap updated
ALT default and mac keymap updated
ALT rules.mk added Auto Shift with default no

* Code cleanup as per discussion with vomindoraan

Code cleanup as per discussion with vomindoraan

* ALT keymap update

Added additional End key on layer 1 to match key cap

* LED driver update addressing PR #3871

Update sync between IS31FL3733 drivers is causing varying behavior in keyboards including brightness mismatch and slight flicker at very low rgb values. Visually, disabling sync is not noticeable. Ref PR #3871 by guarnacciaa.

Added support to enter bootloader from software (bootloader version must be newer than "v2.18Jun 22 2018 17:28:08" until workaround for older is created).
Updated CTRL and ALT keymaps for entering bootloader with Fn+b held for >500ms.
Added basic MacOS keymap for ALT.
USB sleep LED indicator now turns off after 1 second.
Slowed down debug LED code printing.

Renamed keyboard alt67 to alt and adjusted necessary files where alt67 appeared.
CTRL keymap fixed enum structure name.
usb2422 removed stray define no longer used.