# Macros - Send multiple keystrokes when pressing just one key QMK has a number of ways to define and use macros. These can do anything you want- type common phrases for you, copypasta, repetitive game movements, or even help you code. **Security Note**: While it is possible to use macros to send passwords, credit card numbers, and other sensitive information it is a supremely bad idea to do so. Anyone who gets ahold of your keyboard will be able to access that information by opening a text editor. # Macro Definitions By default QMK assumes you don't have any macros. To define your macros you create an `action_get_macro()` function. For example: ```c const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) { if (record->event.pressed) { switch(id) { case 0: return MACRO(D(LSFT), T(H), U(LSFT), T(I), D(LSFT), T(1), U(LSFT), END); case 1: return MACRO(D(LSFT), T(B), U(LSFT), T(Y), T(E), D(LSFT), T(1), U(LSFT), END); } } return MACRO_NONE; }; ``` This defines two macros which will be run when the key they are assigned to is pressed. If you'd like them to run when the release is released instead you can change the if statement: ```c if (!record->event.pressed) { ``` ## Macro Commands A macro can include the following commands: * I() change interval of stroke in milliseconds. * D() press key. * U() release key. * T() type key(press and release). * W() wait (milliseconds). * END end mark. ## Sending strings Sometimes you just want a key to type out words or phrases. For the most common situations we've provided `SEND_STRING()`, which will type out your string for you instead of having to build a `MACRO()`. Right now it assumes a US keymap with a QWERTY layout, so if you are using something else it may not behave as you expect. For example: ```c const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) { if (record->event.pressed) { switch(id) { case 0: SEND_STRING("QMK is the best thing ever!"); return false; } } return MACRO_NONE; }; ``` ## Mapping a Macro to a key Use the `M()` function within your `KEYMAP()` to call a macro. For example, here is the keymap for a 2-key keyboard: ```c const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { [0] = KEYMAP( M(0), M(1) ), }; const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) { if (record->event.pressed) { switch(id) { case 0: return MACRO(D(LSFT), T(H), U(LSFT), T(I), D(LSFT), T(1), U(LSFT), END); case 1: return MACRO(D(LSFT), T(B), U(LSFT), T(Y), T(E), D(LSFT), T(1), U(LSFT), END); } } return MACRO_NONE; }; ``` When you press the key on the left it will type "Hi!" and when you press the key on the right it will type "Bye!". ## Naming your macros If you have a bunch of macros you want to refer to from your keymap while keeping the keymap easily readable you can name them using `#define` at the top of your file. ```c #define M_HI M(0) #define M_BYE M(1) const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { [0] = KEYMAP( M_HI, M_BYE ), }; ``` # Advanced macro functions While working within the `action_get_macro()` function block there are some functions you may find useful. Keep in mind that while you can write some fairly advanced code within a macro if your functionality gets too complex you may want to define a custom keycode instead. Macros are meant to be simple. #### `record->event.pressed` This is a boolean value that can be tested to see if the switch is being pressed or released. An example of this is ```c if (record->event.pressed) { // on keydown } else { // on keyup } ``` #### `register_code();` This sends the `` keydown event to the computer. Some examples would be `KC_ESC`, `KC_C`, `KC_4`, and even modifiers such as `KC_LSFT` and `KC_LGUI`. #### `unregister_code();` Parallel to `register_code` function, this sends the `` keyup event to the computer. If you don't use this, the key will be held down until it's sent. #### `clear_keyboard();` This will clear all mods and keys currently pressed. #### `clear_mods();` This will clear all mods currently pressed. #### `clear_keyboard_but_mods();` This will clear all keys besides the mods currently pressed. # Advanced Example: Single-key copy/paste (hold to copy, tap to paste) This example defines a macro which sends `Ctrl-C` when pressed down, and `Ctrl-V` when released. ```c const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt) { switch(id) { case 0: { if (record->event.pressed) { return MACRO( D(LCTL), T(C), U(LCTL), END ); } else { return MACRO( D(LCTL), T(V), U(LCTL), END ); } break; } } return MACRO_NONE; }; ``` a> 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266