t.m.k. Keyboard Firmware Collection

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

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

Features

• 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

Projects

converter

• ps2_usb - PS/2 keyboard to USB
• adb_usb - ADB keyboard to USB
• m0110_usb - Machintosh 128K/512K/Plus keyboard to USB
• terminal_usb - IBM Model M terminal keyboard(PS/2 scancode set3) to USB
• news_usb - Sony NEWS keyboard to USB
• x68k_usb - Sharp X68000 keyboard to USB
• sun_usb - Sun to USB(type4, 5 and 3?)
• usb_usb - USB to USB(experimental)

keyboard

• hhkb - Happy Hacking Keyboard professional
• macway - Compact keyboard mod
• hbkb - Happy Buckling sprint keyboard(IBM Model M mod)
• IIgs_Standard - Apple IIGS keyboard mod(by JeffreySung)
• hid_liber - HID liberation controller(by alaricljs)
• phantom - Phantom keyboard (by Tranquilite)
• gh60 - GH60 keyboard

Build & Program

Install Tools

First, you need tools to build firmware and program your controller. I assume you are on Windows here.

1. Install WinAVR. This is old but works well for this purpose. WinAVR is a tool set to build firmware including C compiler(gcc) and make commands. You can use CrossPack instead if you are on Mac.

2. Install Atmel FLIP. FLIP is a tool to program(load) firmware into AVR controller(ATMega32u4) via DFU bootloader. ATMega32u4 has DFU bootloader by factory default. You can use dfu-programmer instead if you are on Mac.

3. Install driver for DFU bootloader. At first time you start DFU bootloader on Chip 'Found New Hardware Wizard' will come up on Windows. If you install device driver properly you can find chip name like 'ATmega32U4' under 'LibUSB-Win32 Devices' tree on 'Device Manager'. If not you shall need to update its driver on 'Device Manager'. You will find the driver in FLIP install directory like: C:\Program Files (x86)\Atmel\Flip 3.4.5\usb. If you use dfu-programmer install its driver.

If you use PJRC Teensy you don't need step 2 and 3, just get Teensy loader.

Download source

You can find firmware source at github: https://github.com/tmk/tmk_keyboard

If you are familiar with Git tools you are recommended to use it.
If not you can download zip archive from: https://github.com/tmk/tmk_keyboard/archive/master.zip

Build firmware

1. Open terminal window to get access to commands. You can use cmd in Windows or Terminal.app on Mac OSX. In Windows press Windows key and R then enter cmd in Run command dialog showing up.

2. Move to project directory in the firmware source.

   cd tmk_keyboard/{keyboard or converter}/

3. Build firmware using GNU make command. You'll see _.hex file in that directory unless something unexpected occurs in build process.

   mkae -f Makefile. clean make -f Makefile.

Program Controller

Sock AVR USB chip including ATmega32U4 has DFU bootloader by factory default, you can use DFU tools for this purpose. FLIP is a DFU tool on Windows offered by Atmel. Open source command line DFU tool dfu-programmer also supports AVR chips, which run on Linux, Mac OSX and even Windows. If you have a PJRC Teensy you should use Teensy Loader.

DFU bootloader

To program AVR chip with DFU bootloader use FLIP or dfu-programmer. If you have a proper program command in Makefile just type this.

FLIP has two version of tool, GUI app and command line program. If you want GUI see tutorial section below. To use command line tool run this command. Note that you need to set PATH variable properly.

$ make -f Makefile.<variant> flip

To program with dfu-programmer run:

$ make -f Makefile.<variant> dfu

Teensy

If you have PJRC Teensy see instruction of Teensy Loader at: http://www.pjrc.com/teensy/loader.html Or use this command if you have command line version of Teensy Loader installed.

$ make -f Makefile.<variant> teensy

Other programmer

You may want to use other you favorite programmer like avrdude with AVRISPmkII, Aruduino or USBasp. In that case you can still use make target program for build with configuring PROGRAM_CMD in Makefile.

$ make -f Makefile.<variant> program

FLIP GUI tutorial

1. On menu bar click Device -> Select, then. ATmega32u4.

2. On menu bar click Settings -> Communication -> USB, then click 'Open' button on 'USB Port Connection' dialog. At this point you'll see greyouted widgets on the app get colored and ready.

3. On menu bar click File -> Load HEX File, then select your firmware hex file on File Selector dialog.

4. On 'Operations Flow' panel click 'Run' button to load the firmware binary to the chip. Note that you should keep 'Erase', 'Blank Check', 'Program' and 'Verify' check boxes selected.

5. Re-plug USB cord or click 'Start Application' button to restart your controller. Done.

See also these instaructions if you need.

• http://code.google.com/p/micropendous/wiki/LoadingFirmwareWithFLIP
• http://www.atmel.com/Images/doc7769.pdf

Makefile Options

1. MCU and Frequency.

MCU = atmega32u4       # Teensy 2.0
#MCU = at90usb1286      # Teensy++ 2.0
F_CPU = 16000000

2. Features

Note that comment out to disable them.

MOUSEKEY_ENABLE = yes	# Mouse keys
PS2_MOUSE_ENABLE = yes	# PS/2 mouse(TrackPoint) support
EXTRAKEY_ENABLE = yes	# Enhanced feature for Windows(Audio control and System control)
NKRO_ENABLE = yes		# USB Nkey Rollover

3. Programmer

Optional. Set proper command for your controller, bootloader and programmer.

# for PJRC Teensy
PROGRAM_CMD = teensy_loader_cli -mmcu=$(MCU) -w -v $(TARGET).hex

# for Atmel chip with DFU bootloader
PROGRAM_CMD = dfu-programmer $(MCU) flash $(TARGET).hex

# avrdude with other methods
PROGRAM_CMD = avrdude -p $(MCU) -c avrispmkII -P USB -U flash:w:$(TARGET).hex
PROGRAM_CMD = avrdude -p $(MCU) -c usbasp -U flash:w:$(TARGET).hex
PROGRAM_CMD = avrdude -p $(MCU) -c arduino -P COM1 -b 57600 -U flash:w:$(TARGET).hex

Config.h Options

1. USB vendor/product ID and device description

#define VENDOR_ID       0xFEED
#define PRODUCT_ID      0xBEEF
/* device description */
#define MANUFACTURER    t.m.k.
#define PRODUCT         Macway mod
#define DESCRIPTION     t.m.k. keyboard firmware for Macway mod

2. Keyboard matrix configuration

#define MATRIX_ROWS 8
#define MATRIX_COLS 8
#define MATRIX_HAS_GHOST

3. Mouse keys

4. PS/2 mouse

5. COMMAND key combination

#define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KB_LSHIFT) | MOD_BIT(KB_RSHIFT))) 

Keymap

Many of existent projects offer keymap framework to define your own keymap easily. The following will explain how you can define keymap using this framework. Instead, you can also implement your own keymap_get_action() to return action code for each key if you want.

This is keymap example for HHKB keyboard. Keyamp is defined in keymaps[] array.

static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    /* Layer 0: Default Layer
     * ,-----------------------------------------------------------.
     * |Esc|  1|  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|  \|  `|
     * |-----------------------------------------------------------|
     * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|Backs|
     * |-----------------------------------------------------------|
     * |Contro|  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Enter   |
     * |-----------------------------------------------------------|
     * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift |Fn1|
     * `-----------------------------------------------------------'
     *       |Gui|Alt  |Space                  |Alt  |Fn2|
     *       `-------------------------------------------'
     */
    KEYMAP(ESC, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSLS,GRV, \
           TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSPC, \
           LCTL,A,   S,   D,   F,   G,   H,   J,   K,   L,   FN2, QUOT,ENT, \
           LSFT,Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,RSFT,FN1, \
                LGUI,LALT,          SPC,                RALT,FN3),

    /* Layer 1: HHKB mode (HHKB Fn)
     * ,-----------------------------------------------------------.
     * |Pwr| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Ins|Del|
     * |-----------------------------------------------------------|
     * |Caps |   |   |   |   |   |   |   |Psc|Slk|Pus|Up |   |Backs|
     * |-----------------------------------------------------------|
     * |Contro|VoD|VoU|Mut|   |   |  *|  /|Hom|PgU|Lef|Rig|Enter   |
     * |-----------------------------------------------------------|
     * |Shift   |   |   |   |   |   |  +|  -|End|PgD|Dow|Shift |Fn1|
     * `-----------------------------------------------------------'
     *      |Gui |Alt  |Space                  |Alt  |Gui|
     *      `--------------------------------------------'
     */ 
    KEYMAP(PWR, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, INS, DEL, \
           CAPS,NO,  NO,  NO,  NO,  NO,  NO,  NO,  PSCR,SLCK,PAUS,UP,  NO,  BSPC, \
           LCTL,VOLD,VOLU,MUTE,NO,  NO,  PAST,PSLS,HOME,PGUP,LEFT,RGHT,ENT, \
           LSFT,NO,  NO,  NO,  NO,  NO,  PPLS,PMNS,END, PGDN,DOWN,RSFT,FN0, \
                LGUI,LALT,          SPC,                RALT,RGUI),
    /* Layer 2: Mouse mode (Semicolon)
     * ,-----------------------------------------------------------.
     * |Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Ins|Del|
     * |-----------------------------------------------------------|
     * |Tab  |   |   |   |   |   |MwL|MwD|MwU|MwR|   |   |   |Backs|
     * |-----------------------------------------------------------|
     * |Contro|   |   |   |   |   |McL|McD|McU|McR|Fn0|   |Return  |
     * |-----------------------------------------------------------|
     * |Shift   |   |   |   |   |Mb3|Mb2|Mb1|Mb4|Mb5|   |Shift |   |
     * `-----------------------------------------------------------'
     *      |Gui |Alt  |Mb1                    |Alt  |Fn0|
     *      `--------------------------------------------'
     * Mc: Mouse Cursor / Mb: Mouse Button / Mw: Mouse Wheel 
     */
    KEYMAP(ESC, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, INS, DEL, \
           TAB, NO,  NO,  NO,  NO,  NO,  WH_L,WH_D,WH_U,WH_R,NO,  NO,  NO,  BSPC, \
           LCTL,NO,  ACL0,ACL1,ACL2,NO,  MS_L,MS_D,MS_U,MS_R,FN0, QUOT,ENT, \
           LSFT,NO,  NO,  NO,  NO,  BTN3,BTN2,BTN1,BTN4,BTN5,SLSH,RSFT,NO, \
                LGUI,LALT,          BTN1,               RALT,FN0),
};

static const uint16_t PROGMEM fn_actions[] = {
    ACTION_LAYER_DEFAULT,                           // FN0
    ACTION_LAYER_SET(1),                            // FN1
    ACTION_LAYER_SET_TAP_KEY(2, KC_SCLN),           // FN2
    ACTION_LAYER_BIT_TOGGLE(2),                     // FN3
};

1. Keycode

See common/keycode.h. Keycode is 8bit internal code to inidicate action performed on key in keymap. Keycode has KC_ prefixed symbol respectively. Most of keycodes like 'KC_A' have simple action register key on press and unregister on release, on the other some of keycodes has some special actions like Fn keys, Media contorl keys, System control keys and Mouse keys.

In KEYMAP definition you need to omit prefix part KC_ of keycode to keep keymap compact. For example, just use A instead you place KC_A in KEYMAP. Some keycodes has 4-letter short name in addition to descriptive name, you'll prefer short one in KEYMAP.

KC_NO indicates the key has no keycode to transmit.

KC_LGUI and KC_RGUI are windows key or command key in Mac.

KC_FNnn are Fn keys which not given any action at the beginning unlike most of keycodes has its own action. To use these keys in KEYMAP you need to assign action you want at first. Action of Fn is defined in fn_actions[] and index of the array is identical with number part of KC_FNnn. Thus KC_FN0 designates action defined in first element of the array. 32 Fn keys can be defined at most.

See keycode table in doc/keycode.txt or common/keycode.h for other keycodes.

In regard to implementation side most of keycodes are identical with [HID usage] sent to host for real and some virtual keycodes are defined to support special actions. [HID usage]: http://www.usb.org/developers/devclass_docs/Hut1_11.pdf

2. Action

See common/action.h. Action is a 16bit code and defines function to perform on events of a key like press, release, hold and tap. You can define various actions to use various action codes.

Most of keys just register 8bit keycode as HID usage(or scan code) to host, but to support other complex functions needs 16bit extended action codes internally. But using 16bit action codes with keymap results in double size in memory against keycodes. To avoid this waste 8bit keycodes are used in KEYMAP to define instead of action codes. Keycodes can be considered as subset of action codes. Like KC_A(0x04) is equal to a Key action(0x0004) that transmit keycode of A.

2.1 Key action

Key is simple action that registers keycode on press of key and unregister on release. You can define Key action on A with:

ACTION_KEY(KC_A)

But you won't need to use this expression directly because you can just put symbol like A in KEYMAP.

Say you want to assign a key to Shift + 1 to get ! or Alt + Tab to switch windows.

ACTION_MOD_KEY(KC_LSHIFT, KC_1)
ACTION_MOD_KEY(KC_LALT, KC_TAB)

Alt,Shift + Tab ACTION_MODS_KEY((MOD_BIT(KC_LALT) | MOD_BIT(KC_LSHIFT)), KC_TAB)

These actions are comprised of strokes of modifiers and a key. Macro action is needed if you want more complex key strokes.

2.2 Layer Actions

This sets default layer into current layer. With this action you can return to default layer.

ACTION_LAYER_DEFAULT

Layer Set action sets given layer argument to current layer. Layer Set action can take 0 to 15 as argument.

ACTION_LAYER_SET(layer)
ACTION_LAYER_SET_TOGGLE(layer)
ACTION_LAYER_SET_TAP_KEY(layer, key)
ACTION_LAYER_SET_TAP_TOGGLE(layer)

Layer Bit action XOR bits with current layer. Layer Bit action can take 0 to 8 as argument.

ACTION_LAYER_BIT(bits)
ACTION_LAYER_BIT_TOGGLE(bits)
ACTION_LAYER_BIT_TAP_KEY(bits, key)
ACTION_LAYER_BIT_TAP_TOGGLE(bits)

These acitons change default layer. ACTION_LAYER_SET_DEFAULT(layer) ACTION_LAYER_BIT_DEFAULT(bits)

2.3 Macro action

Macro action indicates complex key strokes. TODO

2.4 Function action

Function action can be defined freely in C function. TODO Function action is implemented in keymap_call_function()

3. Layer

Layer is key-action map to assign action to every physical key. You can define multiple layers in keymap and select a layer out of keymap during operation at will.

First layer is indexed by Layer 0 which usually become default layer and active in initial state. current layer is active layer at that time and can be changed with user interaction. You can define 16 layers at most in default keymap framework.

you can define a layer with placing keycode symbols separated with comma in KEYMAP, which is formed with resemblance to physical keyboard layout so as you can easily put keycode on place you want to map. You can define most of keys with just using keycodes except for Fn key serving special actions.

4. Layer switching

You can have some ways to switch layer with these actions. There are two kind of layer switch action Layer Set and Layer Bit and two type of switching behaviour Momentary and Toggle.

4.1 Momentary switching

Momentary switching changes layer only while holding Fn key.

4.1.1 Momentary Set

This Layer Set action sets new layer(Layer 1) to current layer on key press event.

ACTION_LAYER_SET(1)

It switches to destination layer immediately when key is pressed, after that actions on keymap of destination layer is perfomed. Thus you shall need to place action to come back on destination layer, or you will be stuck in destination layer without way to get back. To get back to default layer you can use this action.

ACTION_LAYER_DEFAULT

4.1.2 Momentary Bit

This Layer Bit action performs XOR(1) with current layer on both press and release event. If you are on Layer 0 now next layer to switch will be Layer 1. To come back to previous layer you need to place same action on destination layer.

ACTION_LAYER_BIT(1)

4.2 Toggle switching

Toggle switching changes layer after press then release. You keep being on the layer until you press key to return.

4.2.1 Toggle Set

This Layer Set Toggle action is to set Layer 1 to current layer on release and do none on press.

ACTION_LAYER_SET_TOGGLE(1)

To get back to default layer you can use this action.

ACTION_LAYER_DEFAULT

4.2.2 Toggle Bit

This Layer Bit Toggle action is to XOR 1 with current layer on release and do none on press. If you are on Layer 2 you'll switch to Layer 3 on press. To come back to previous layer you need to place same action on destination layer.

ACTION_LAYER_BIT_TOGGLE(1)

4.3 Momentary switching with Tap key

These actions switch to layer only while holding Fn key and register key on tap. Tap means to press and release key quickly.

ACTION_LAYER_SET_TAP_KEY(2, KC_SCLN)
ACTION_LAYER_SET_BIT_KEY(2, KC_SCLN)

With these you can place layer switching function on normal alphabet key like ; without losing its original register function.

4.4 Momentary switching with Tap Toggle

This changes layer only while holding Fn key and toggle layer after several taps. Tap means to press and release key quickly.

ACTION_LAYER_SET_TAP_TOGGLE(layer)
ACTION_LAYER_BIT_TAP_TOGGLE(layer)

Number of taps can be defined with TAPPING_TOGGLE in config.h, 5 by default.

Legacy Keymap

This was used in prior version and still works due to legacy support code in common/keymap.c. Legacy keymap doesn't support many of features that new keymap offers.

In comparison with new keymap how to define Fn key is different. It uses two arrays fn_layer[] and fn_keycode[]. The index of arrays corresponds with postfix number of Fn key. Array fn_layer[] indicates destination layer to switch and fn_keycode[] has keycodes to send when tapping Fn key.

In following setting example, Fn0, Fn1 and Fn2 switch layer to 1, 2 and 2 respectively. Fn2 registers Space key when tap while Fn0 and Fn1 doesn't send any key.

static const uint8_t PROGMEM fn_layer[] = {
    1,              // Fn0
    2,              // Fn1
    2,              // Fn2
};

static const uint8_t PROGMEM fn_keycode[] = {
    KC_NO,          // Fn0
    KC_NO,          // Fn1
    KC_SPC,         // Fn2
};

Debuging

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

You will see output from firmware like this.

r/c 01234567
00: 00000000
01: 00000000
02: 00000000
03: 00000000
04: 00000000
05: 00000000
06: 00000000
07: 00000000

---- action_exec: start -----
EVENT: 0307u(22511)
Tapping: Tap release(2)
ACTION: ACT_LAYER[5:2C]
LAYER_PRESSED: Tap: unregister_code
TAPPING_KEY=0307u(22511):2
processed: 0307u(22511):2

Tapping: End(Timeout after releasing last tap): FFFFu(22715)
TAPPING_KEY=0000u(0):0

Magic Comannds

To see help press Magic + H.

Magic key bind may be 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
p:      toggle print enable
v:      print device version & info
t:      print timer count
s:      print status
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

Start Your Own Project

Files & Directories

Top

• common/ - common codes
• protocol/ - keyboard protocol support
• keyboard/ - keyboard projects
• converter/ - protocol converter projects
• doc/ - documents
• common.mk - Makefile for common
• protoco.mk - Makefile for protocol
• rules.mk - Makefile for build rules

Common

• action.[ch]
• action_macro.[ch]
• bootloader.[ch]
• command.[ch]
• controller_teensy.h
• debug.[ch]
• host.[ch]
• host_driver.h
• keyboard.[ch]
• keycode.h
• keymap.[ch]
• led.h
• matrix.h
• mousekey.[ch]
• print.[ch]
• report.h
• sendchar.h
• sendchar_null.c
• sendchar_uart.c
• timer.[ch]
• uart.[ch]
• util.[ch]

Keyboard Protocols

• lufa/ - LUFA USB stack
• pjrc/ - PJRC USB stack
• vusb/ - Objective Development V-USB
• iwrap/ - Bluetooth HID for Bluegiga iWRAP
• ps2.c - PS/2 protocol
• adb.c - Apple Desktop Bus protocol
• m0110.c - Macintosh 128K/512K/Plus keyboard protocol
• news.c - Sony NEWS keyboard protocol
• x68k.c - Sharp X68000 keyboard protocol
• serial_soft.c - Asynchronous Serial protocol implemented by software

License

Under GPL 2 or later. Some protocol files are under Modified BSD License. PJRC stack has its own license.