Keyboard firmwares for Atmel AVR and Cortex-M
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Latest commit 093bfd6 Oct 21, 2016 @tmk alps64: unimap definition

TMK Keyboard Firmware Collection

This repository includes keyboard and converter firmware projects built with tmk_core keyboard library.

The latest source code is available here:



Keymap framework was updated. fn_actions[] should be defined as action_t instead of uint16_t. And default code for keymap handling is now included in core you just need define uint8_t keymaps[][MATRIX_ROWS][MATRIX_COLS] and action_t fn_actions[].


Some projects were moved from converter and keyboard to orphan directory. Those might be removed in some future but you will be able to access them with orphans tag. See


core: flabbergast's Chibios protocol was merged from (@72b1668). See tmk_core/protocol/chibios/ Chibios protocol supports Cortex-M such as STM32 and Kinetis.


Core library was separated to other branch core.

In Makefile you need to set TMK_DIR to indicate core library location now.

TMK_DIR = ../../tmk_core


You can find some keyboard specific projects under converter and keyboard directory.



Projects based tmk_keyboard or tmk_core


GPLv2 or later. Some protocol files are under Modified BSD License.

Third party libraries like LUFA, PJRC and V-USB have their own license respectively.

Build Firmware and Program Controller

See tmk_core/doc/

Change your keymap

See tmk_core/doc/

Magic Commands

To see help press Magic + H.

Magic key combination is LShift + RShift in many projects, but Power key on ADB converter. Magic keybind can be vary on each project, check config.h in project directory.

Following commands can be also executed with Magic + key. In console mode Magic keybind is not needed.

----- Command Help -----
c:      enter console mode
d:      toggle debug enable
x:      toggle matrix debug
k:      toggle keyboard debug
m:      toggle mouse debug
v:      print device version & info
t:      print timer count
s:      print status
e:      print eeprom config
n:      toggle NKRO
0/F10:  switch to Layer0
1/F1:   switch to Layer1
2/F2:   switch to Layer2
3/F3:   switch to Layer3
4/F4:   switch to Layer4
PScr:   power down/remote wake-up
Caps:   Lock Keyboard(Child Proof)
Paus:   jump to bootloader

Boot Magic Configuration - Virtual DIP Switch

Boot Magic are executed during boot up time. Press Magic key below then plug in keyboard cable. Note that you must use keys of Layer 0 as Magic keys. These settings are stored in EEPROM so that retain your configure over power cycles.

To avoid configuring accidentally additive salt key KC_SPACE also needs to be pressed along with the following configuration keys. The salt key is configurable in config.h. See tmk_core/common/bootmagic.h.


  • Skip reading EEPROM to start with default configuration(ESC)
  • Clear configuration stored in EEPROM to reset configuration(Backspace)


  • Kick up Bootloader(B)


  • Debug enable(D)
  • Debug matrix enable(D+X)
  • Debug keyboard enable(D+K)
  • Debug mouse enable(D+M)


  • Swap Control and CapsLock(Left Control)
  • Change CapsLock to Control(Caps Lock)
  • Swap LeftAlt and Gui(Left Alt)
  • Swap RightAlt and Gui(Right Alt)
  • Disable Gui(Left Gui)
  • Swap Grave and Escape(Grave)
  • Swap BackSlash and BackSpace(Back Slash)
  • Enable NKRO on boot(N)

Default Layer

  • Set Default Layer to 0(0)
  • Set Default Layer to 1(1)
  • Set Default Layer to 2(2)
  • Set Default Layer to 3(3)
  • Set Default Layer to 4(4)
  • Set Default Layer to 5(5)
  • Set Default Layer to 6(6)
  • Set Default Layer to 7(7)

Mechanical Locking support

This feature makes it possible for you to use mechanical locking switch for CapsLock, NumLock or ScrollLock. To enable this feature define these macros in config.h and use KC_LCAP, KC_LN UM or KC_LSCR in keymap for locking key instead of normal KC_CAPS, KC_NLCK or KC_SLCK. Res ync option tries to keep switch state consistent with keyboard LED state.


Start Your Own Project

  1. Add tmk_core into your repository using git submodule or git subtree.
  2. Copy files from tmk_keybaord or other project similar to yours
  3. Edit those files to support your keyboard.

See these as examples.


Use PJRC's hid_listen to see debug messages. You can use xprintf() to display debug info, see tmk_core/common/xprintf.h.

Files and Directories


  • keyboard/ - keyboard projects
  • converter/ - protocol converter projects
  • tmk_core/ - core library
  • tmk_core/doc/ - documents


  • Report bugs in github Issues.
  • Pull requets are also welcomed.

Coding Style

  • Doesn't use Tab to indent, use 4-spaces instead.

Other Keyboard Firmware Projects

You can learn a lot about keyboard firmware from these. See Other Projects other than TMK.