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Open-source keyboard firmware for Atmel AVR and Arm USB families
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Dan McGregor c17b8a599e Make action_for_key a weak symbol
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README.md

TMK Keyboard Firmware Collection

This is a keyboard firmware with some useful features for Atmel AVR controller.

Source code is available here: http://github.com/tmk/tmk_keyboard

Updates

2015/04/22

Core library was separated to other branch core. https://github.com/tmk/tmk_keyboard/tree/core

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

TMK_DIR = ../../tmk_core

Features

These features can be used in your keyboard.

  • Multi-layer Keymap - Multiple keyboard layouts with layer switching
  • Mouse key - Mouse control with keyboard
  • System Control Key - Power Down, Sleep, Wake Up and USB Remote Wake up
  • Media Control Key - Volume Down/Up, Mute, Next/Prev track, Play, Stop and etc
  • USB NKRO - 120 keys(+ 8 modifiers) simultaneously
  • PS/2 mouse support - PS/2 mouse(TrackPoint) as composite device
  • Keyboard protocols - PS/2, ADB, M0110, Sun and other old keyboard protocols
  • User Function - Customizable function of key with writing code
  • Macro - Very primitive at this time
  • Keyboard Tricks - Oneshot modifier and modifier with tapping feature
  • Debug Console - Messages for debug and interaction with firmware
  • Virtual DIP Switch - Configurations stored EEPROM(Boot Magic)
  • Locking CapsLock - Mechanical switch support for CapsLock
  • Breathing Sleep LED - Sleep indicator with charm during USB suspend
  • Backlight - Control backlight levels

Projects

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

converter

keyboard

Extenal projects using tmk_keyboard

License

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 doc/build.md.

Change your keymap

See doc/keymap.md.

Magic Commands

To see help press Magic + H.

Magic key combination is LShift + RShift in many project, 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.

General

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

Bootloader

  • Kick up Bootloader(B)

Debug

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

Keymap

  • 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.

#define LOCKING_SUPPORT_ENABLE
#define LOCKING_RESYNC_ENABLE

Start Your Own Project

TBD

Debugging

Use PJRC's hid_listen to see debug messages. You can use the tool for debug even if firmware use LUFA stack.

You can use xprintf() to display debug info on hid_listen, see tmk_core/common/xprintf.h.

Files and Directories

Top

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

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 doc/other_projects.md.