summaryrefslogtreecommitdiffstats
path: root/docs/faq_keymap.md
blob: eb49a369968fd85f254286722679221c10fb8a77 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
# Keymap FAQ

This page covers questions people often have about keymaps. If you haven't you should read [Keymap Overview](keymap.md) first.

## What Keycodes Can I Use?
See [Keycodes](keycodes.md) for an index of keycodes available to you. These link to more extensive documentation when available.

Keycodes are actually defined in [common/keycode.h](https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/keycode.h).

## `KC_SYSREQ` isn't working
Use keycode for Print Screen(`KC_PSCREEN` or `KC_PSCR`) instead of `KC_SYSREQ`. Key combination of 'Alt + Print Screen' is recognized as 'System request'.

See [issue #168](https://github.com/tmk/tmk_keyboard/issues/168) and
- http://en.wikipedia.org/wiki/Magic_SysRq_key
- http://en.wikipedia.org/wiki/System_request

## Power key doesn't work
Use `KC_PWR` instead of `KC_POWER` or vice versa.
- `KC_PWR` works with Windows and Linux, not with OSX.
- `KC_POWER` works with OSX and Linux, not with Windows.

More info: http://geekhack.org/index.php?topic=14290.msg1327264#msg1327264

## Oneshot modifier
Solves my personal 'the' problem. I often got 'the' or 'THe' wrongly instead of 'The'.  Oneshot Shift mitgates this for me.
https://github.com/tmk/tmk_keyboard/issues/67

## Modifier/Layer stuck
Modifier keys or layers can be stuck unless layer switching is configured properly.
For Modifier keys and layer actions you have to place `KC_TRANS` on same position of destination layer to  unregister the modifier key or return to previous layer on release event.

- https://github.com/tmk/tmk_core/blob/master/doc/keymap.md#31-momentary-switching
- http://geekhack.org/index.php?topic=57008.msg1492604#msg1492604
- https://github.com/tmk/tmk_keyboard/issues/248


## Mechanical Lock Switch Support

This feature is for *mechanical lock switch* like [this Alps one](http://deskthority.net/wiki/Alps_SKCL_Lock). You can enable it by adding this to your `config.h`:
 
```
#define LOCKING_SUPPORT_ENABLE
#define LOCKING_RESYNC_ENABLE
```

After enabling this feature use keycodes `KC_LCAP`, `KC_LNUM` and `KC_LSCR` in your keymap instead.

Old vintage mechanical keyboards occasionally have lock switches but modern ones don't have. ***You don't need this feature in most case and just use keycodes `KC_CAPS`, `KC_NLCK` and `KC_SLCK`.***

## Input special charactors other than ASCII like Cédille 'Ç'
NO UNIVERSAL METHOD TO INPUT THOSE WORKS OVER ALL SYSTEMS. You have to define **MACRO** in way specific to your OS or layout.

See this post for example **MACRO** code.

http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-120.html#p195620

On **Windows** you can use `AltGr` key or **Alt code**.
- http://en.wikipedia.org/wiki/AltGr_key
- http://en.wikipedia.org/wiki/Alt_code

On **Mac** OS defines `Option` key combinations.
- http://en.wikipedia.org/wiki/Option_key#Alternative_keyboard_input

On **Xorg** you can use `compose` key, instead.
- http://en.wikipedia.org/wiki/Compose_key

And see this for **Unicode** input.
- http://en.wikipedia.org/wiki/Unicode_input


## Apple/Mac keyboard Fn
Not supported.

Apple/Mac keyboard sends keycode for Fn unlike most of other keyboards.
I think you can send Apple Fn key using Apple venter specific Page 0xff01 and usage 0x0003. But you have to change HID Report Descriptor for this, of course.

https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/AppleHIDUsageTables.h


## Media control keys in Mac OSX
#### KC_MNXT and KC_MPRV does not work on Mac
Use `KC_MFFD`(`KC_MEDIA_FAST_FORWARD`) and `KC_MRWD`(`KC_MEDIA_REWIND`) instead of `KC_MNXT` and `KC_MPRV`.
See https://github.com/tmk/tmk_keyboard/issues/195


## Keys supported in Mac OSX?
You can know which keycodes are supported in OSX from this source code.

`usb_2_adb_keymap` array maps Keyboard/Keypad Page usages to ADB scancodes(OSX internal keycodes).

https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/Cosmo_USB2ADB.c

And `IOHIDConsumer::dispatchConsumerEvent` handles Consumer page usages.

https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/IOHIDConsumer.cpp


## JIS keys in Mac OSX
Japanese JIS keyboard specific keys like `無変換(Muhenkan)`, `変換(Henkan)`, `ひらがな(hiragana)` are not recognized on OSX. You can use **Seil** to enable those keys, try following options.

* Enable NFER Key on PC keyboard
* Enable XFER Key on PC keyboard
* Enable KATAKANA Key on PC keyboard

https://pqrs.org/osx/karabiner/seil.html


## RN-42 Bluetooth doesn't work with Karabiner
Karabiner - Keymapping tool on Mac OSX - ignores inputs from RN-42 module by default. You have to enable this option to make Karabiner working with your keyboard.
https://github.com/tekezo/Karabiner/issues/403#issuecomment-102559237

See these for the deail of this problem.
https://github.com/tmk/tmk_keyboard/issues/213
https://github.com/tekezo/Karabiner/issues/403


## Esc and `~ on a key

Use `GRAVE_ESC` or `KC_GESC` in your keymap. `GUI`+`GRAVE_ESC` results in `` ` `` and `SHIFT`+`GRAVE_ESC` results in `~`.

Note that this will break the CTRL+SHIFT+ESC shortcut to the Windows task manager. Use `#define GRAVE_ESC_CTRL_OVERRIDE` in your `config.h` to get the shortcut back. With this option, `ESC_GRAVE` results in `ESC` if `CTRL` is held, even if `SHIFT` or `GUI` are also held.

## Arrow on Right Modifier keys with Dual-Role
This turns right modifer keys into arrow keys when the keys are tapped while still modifiers when the keys are hold. In TMK the dual-role function is dubbed **TAP**.
```

#include "keymap_common.h"


/* Arrow keys on right modifier keys with TMK dual role feature
 *
 *  https://github.com/tmk/tmk_core/blob/master/doc/keymap.md#213-modifier-with-tap-keydual-role
 *  https://en.wikipedia.org/wiki/Modifier_key#Dual-role_keys
 */
const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    /* 0: qwerty */
    [0] = KEYMAP( \
        ESC, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, NUHS,BSPC, \
        TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSLS, \
        LCTL,A,   S,   D,   F,   G,   H,   J,   K,   L,   SCLN,QUOT,ENT,  \
        LSFT,NUBS,Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,FN0, ESC, \
        FN4, LGUI,LALT,          SPC,                     APP, FN2, FN1, FN3),
    [1] = KEYMAP( \
        GRV, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, TRNS,TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,\
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,FN5, TRNS, \
        TRNS,TRNS,TRNS,          TRNS,                    TRNS,FN7, FN6, FN8),
};

const uint16_t PROGMEM fn_actions[] = {
    [0] = ACTION_MODS_TAP_KEY(MOD_RSFT, KC_UP),
    [1] = ACTION_MODS_TAP_KEY(MOD_RGUI, KC_DOWN),
    [2] = ACTION_MODS_TAP_KEY(MOD_RALT, KC_LEFT),
    [3] = ACTION_MODS_TAP_KEY(MOD_RCTL, KC_RIGHT),
    [4] = ACTION_LAYER_MOMENTARY(1),
    [5] = ACTION_MODS_TAP_KEY(MOD_RSFT, KC_PGUP),
    [6] = ACTION_MODS_TAP_KEY(MOD_RGUI, KC_PGDN),
    [7] = ACTION_MODS_TAP_KEY(MOD_RALT, KC_HOME),
    [8] = ACTION_MODS_TAP_KEY(MOD_RCTL, KC_END),
};

```

Dual-role key: https://en.wikipedia.org/wiki/Modifier_key#Dual-role_keys


## Eject on Mac OSX
`KC_EJCT` keycode works on OSX. https://github.com/tmk/tmk_keyboard/issues/250
It seems Windows 10 ignores the code and Linux/Xorg recognizes but has no mapping by default.

Not sure what keycode Eject is on genuine Apple keyboard actually. HHKB uses `F20` for Eject key(`Fn+f`) on Mac mode but this is not same as Apple Eject keycode probably.


## What's weak_mods and real_mods in action_util.c
___TO BE IMPROVED___

real_mods is intended to retains state of real/physical modifier key state, while
weak_mods retains state of virtual or temprary modifiers which should not affect state real modifier key.

Let's say you hold down physical left shift key and type ACTION_MODS_KEY(LSHIFT, KC_A), 

with weak_mods,
* (1) hold down left shift: real_mods |= MOD_BIT(LSHIFT)
* (2) press ACTION_MODS_KEY(LSHIFT, KC_A): weak_mods |= MOD_BIT(LSHIFT)
* (3) release ACTION_MODS_KEY(LSHIFT, KC_A): waek_mods &= ~MOD_BIT(LSHIFT)
real_mods still keeps modifier state.

without weak mods,
* (1) hold down left shift: real_mods |= MOD_BIT(LSHIFT)
* (2) press ACTION_MODS_KEY(LSHIFT, KC_A): real_mods |= MOD_BIT(LSHIFT)
* (3) release ACTION_MODS_KEY(LSHIFT, KC_A): real_mods &= ~MOD_BIT(LSHIFT)
here real_mods lost state for 'physical left shift'.

weak_mods is ORed with real_mods when keyboard report is sent.
https://github.com/tmk/tmk_core/blob/master/common/action_util.c#L57

## Timer functionality

It's possible to start timers and read values for time-specific events - here's an example:

```c
static uint16_t key_timer;
key_timer = timer_read();

if (timer_elapsed(key_timer) < 100) {
  // do something if less than 100ms have passed
} else {
  // do something if 100ms or more have passed
}
```

It's best to declare the `static uint16_t key_timer;` at the top of the file, outside of any code blocks you're using it in.