214 lines
9.0 KiB
Markdown
214 lines
9.0 KiB
Markdown
# Frequently Asked Keymap Questions
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This page covers questions people often have about keymaps. If you haven't you should read [Keymap Overview](keymap.html) first.
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## What Keycodes Can I Use?
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See [Basic Keycodes](keycodes.html) and [Quantum Keycodes](quantum_keycodes.html) for most of the keys you can define.
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Keycodes are actually defined in [common/keycode.h](https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/keycode.h).
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## `KC_SYSREQ` isn't working
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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'.
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See [issue #168](https://github.com/tmk/tmk_keyboard/issues/168) and
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- http://en.wikipedia.org/wiki/Magic_SysRq_key
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- http://en.wikipedia.org/wiki/System_request
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## Power key doesn't work
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Use `KC_PWR` instead of `KC_POWER` or vice versa.
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- `KC_PWR` works with Windows and Linux, not with OSX.
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- `KC_POWER` works with OSX and Linux, not with Windows.
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More info: http://geekhack.org/index.php?topic=14290.msg1327264#msg1327264
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## Oneshot modifier
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Solves my personal 'the' problem. I often got 'the' or 'THe' wrongly instead of 'The'. Oneshot Shift mitgates this for me.
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https://github.com/tmk/tmk_keyboard/issues/67
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## Modifier/Layer stuck
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Modifier keys or layers can be stuck unless layer switching is configured properly.
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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.
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- https://github.com/tmk/tmk_core/blob/master/doc/keymap.md#31-momentary-switching
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- http://geekhack.org/index.php?topic=57008.msg1492604#msg1492604
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- https://github.com/tmk/tmk_keyboard/issues/248
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## Mechanical Lock Switch Support
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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`:
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```
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#define LOCKING_SUPPORT_ENABLE
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#define LOCKING_RESYNC_ENABLE
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```
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After enabling this feature use keycodes `KC_LCAP`, `KC_LNUM` and `KC_LSCR` in your keymap instead.
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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`.***
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## Input special charactors other than ASCII like Cédille 'Ç'
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NO UNIVERSAL METHOD TO INPUT THOSE WORKS OVER ALL SYSTEMS. You have to define **MACRO** in way specific to your OS or layout.
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See this post for example **MACRO** code.
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http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-120.html#p195620
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On **Windows** you can use `AltGr` key or **Alt code**.
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- http://en.wikipedia.org/wiki/AltGr_key
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- http://en.wikipedia.org/wiki/Alt_code
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On **Mac** OS defines `Option` key combinations.
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- http://en.wikipedia.org/wiki/Option_key#Alternative_keyboard_input
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On **Xorg** you can use `compose` key, instead.
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- http://en.wikipedia.org/wiki/Compose_key
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And see this for **Unicode** input.
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- http://en.wikipedia.org/wiki/Unicode_input
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## Apple/Mac keyboard Fn
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Not supported.
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Apple/Mac keyboard sends keycode for Fn unlike most of other keyboards.
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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.
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https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/AppleHIDUsageTables.h
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## Media control keys in Mac OSX
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#### KC_MNXT and KC_MPRV does not work on Mac
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Use `KC_MFFD`(`KC_MEDIA_FAST_FORWARD`) and `KC_MRWD`(`KC_MEDIA_REWIND`) instead of `KC_MNXT` and `KC_MPRV`.
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See https://github.com/tmk/tmk_keyboard/issues/195
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## Keys supported in Mac OSX?
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You can know which keycodes are supported in OSX from this source code.
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`usb_2_adb_keymap` array maps Keyboard/Keypad Page usages to ADB scancodes(OSX internal keycodes).
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https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/Cosmo_USB2ADB.c
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And `IOHIDConsumer::dispatchConsumerEvent` handles Consumer page usages.
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https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/IOHIDConsumer.cpp
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## JIS keys in Mac OSX
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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.
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* Enable NFER Key on PC keyboard
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* Enable XFER Key on PC keyboard
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* Enable KATAKANA Key on PC keyboard
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https://pqrs.org/osx/karabiner/seil.html
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## RN-42 Bluetooth doesn't work with Karabiner
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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.
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https://github.com/tekezo/Karabiner/issues/403#issuecomment-102559237
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See these for the deail of this problem.
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https://github.com/tmk/tmk_keyboard/issues/213
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https://github.com/tekezo/Karabiner/issues/403
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## Esc and `~ on a key
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Use `GRAVE_ESC` or `KC_GESC` in your keymap. `GUI`+`GRAVE_ESC` results in `` ` `` and `SHIFT`+`GRAVE_ESC` results in `~`.
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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.
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## Arrow on Right Modifier keys with Dual-Role
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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**.
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```
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#include "keymap_common.h"
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/* Arrow keys on right modifier keys with TMK dual role feature
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*
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* https://github.com/tmk/tmk_core/blob/master/doc/keymap.md#213-modifier-with-tap-keydual-role
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* https://en.wikipedia.org/wiki/Modifier_key#Dual-role_keys
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*/
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const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
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/* 0: qwerty */
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[0] = KEYMAP( \
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ESC, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, MINS,EQL, NUHS,BSPC, \
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TAB, Q, W, E, R, T, Y, U, I, O, P, LBRC,RBRC,BSLS, \
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LCTL,A, S, D, F, G, H, J, K, L, SCLN,QUOT,ENT, \
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LSFT,NUBS,Z, X, C, V, B, N, M, COMM,DOT, SLSH,FN0, ESC, \
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FN4, LGUI,LALT, SPC, APP, FN2, FN1, FN3),
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[1] = KEYMAP( \
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GRV, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, TRNS,TRNS, \
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TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,\
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TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
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TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,FN5, TRNS, \
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TRNS,TRNS,TRNS, TRNS, TRNS,FN7, FN6, FN8),
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};
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const uint16_t PROGMEM fn_actions[] = {
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[0] = ACTION_MODS_TAP_KEY(MOD_RSFT, KC_UP),
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[1] = ACTION_MODS_TAP_KEY(MOD_RGUI, KC_DOWN),
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[2] = ACTION_MODS_TAP_KEY(MOD_RALT, KC_LEFT),
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[3] = ACTION_MODS_TAP_KEY(MOD_RCTL, KC_RIGHT),
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[4] = ACTION_LAYER_MOMENTARY(1),
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[5] = ACTION_MODS_TAP_KEY(MOD_RSFT, KC_PGUP),
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[6] = ACTION_MODS_TAP_KEY(MOD_RGUI, KC_PGDN),
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[7] = ACTION_MODS_TAP_KEY(MOD_RALT, KC_HOME),
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[8] = ACTION_MODS_TAP_KEY(MOD_RCTL, KC_END),
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};
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```
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Dual-role key: https://en.wikipedia.org/wiki/Modifier_key#Dual-role_keys
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## Eject on Mac OSX
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`KC_EJCT` keycode works on OSX. https://github.com/tmk/tmk_keyboard/issues/250
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It seems Windows 10 ignores the code and Linux/Xorg recognizes but has no mapping by default.
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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.
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## What's weak_mods and real_mods in action_util.c
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___TO BE IMPROVED___
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real_mods is intended to retains state of real/physical modifier key state, while
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weak_mods retains state of virtual or temprary modifiers which should not affect state real modifier key.
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Let's say you hold down physical left shift key and type ACTION_MODS_KEY(LSHIFT, KC_A),
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with weak_mods,
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* (1) hold down left shift: real_mods |= MOD_BIT(LSHIFT)
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* (2) press ACTION_MODS_KEY(LSHIFT, KC_A): weak_mods |= MOD_BIT(LSHIFT)
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* (3) release ACTION_MODS_KEY(LSHIFT, KC_A): waek_mods &= ~MOD_BIT(LSHIFT)
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real_mods still keeps modifier state.
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without weak mods,
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* (1) hold down left shift: real_mods |= MOD_BIT(LSHIFT)
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* (2) press ACTION_MODS_KEY(LSHIFT, KC_A): real_mods |= MOD_BIT(LSHIFT)
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* (3) release ACTION_MODS_KEY(LSHIFT, KC_A): real_mods &= ~MOD_BIT(LSHIFT)
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here real_mods lost state for 'physical left shift'.
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weak_mods is ORed with real_mods when keyboard report is sent.
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https://github.com/tmk/tmk_core/blob/master/common/action_util.c#L57
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## Timer functionality
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It's possible to start timers and read values for time-specific events - here's an example:
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```c
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static uint16_t key_timer;
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key_timer = timer_read();
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if (timer_elapsed(key_timer) < 100) {
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// do something if less than 100ms have passed
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} else {
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// do something if 100ms or more have passed
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}
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```
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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.
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