qmk_firmware/keyboards/atreus/keymaps/gerb/keymap.c

// This is the personal keymap of Chris Gerber (@gerbercj). I haven't worked out the kinks
// with the Colemak and Dvorak support yet, but everything else works nicely.

#include QMK_KEYBOARD_H

// Each layer gets a name for readability, which is then used in the keymap matrix below.
// The underscores don't mean anything - you can have a layer called STUFF or any other name.
// Layer names don't all need to be of the same length, obviously, and you can also skip them
// entirely and just use numbers.
#define _QW 0
#define _CM 1
#define _DV 2
#define _L1 3
#define _L2 4

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  [_QW] = LAYOUT( /* Qwerty */
    KC_Q,   KC_W,   KC_E,    KC_R,    KC_T,                      KC_Y,   KC_U,    KC_I,    KC_O,    KC_P,
    KC_A,   KC_S,   KC_D,    KC_F,    KC_G,                      KC_H,   KC_J,    KC_K,    KC_L,    KC_SCLN,
    KC_Z,   KC_X,   KC_C,    KC_V,    KC_B,                      KC_N,   KC_M,    KC_COMM, KC_DOT,  KC_SLSH,
    KC_ESC, KC_TAB, KC_LGUI, KC_LSFT, KC_BSPC, KC_LALT, KC_RCTL, KC_SPC, MO(_L1), KC_MINS, KC_QUOT, KC_ENT
  ),
  [_CM] = LAYOUT( /* Colemak */
    KC_Q,   KC_W,   KC_F,    KC_P,    KC_G,                      KC_J,    KC_L,    KC_U,    KC_Y,    KC_SCLN,
    KC_A,   KC_R,   KC_S,    KC_T,    KC_D,                      KC_H,    KC_N,    KC_E,    KC_I,    KC_O,
    KC_Z,   KC_X,   KC_C,    KC_V,    KC_B,                      KC_K,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,
    KC_ESC, KC_TAB, KC_LGUI, KC_LSFT, KC_BSPC, KC_LALT, KC_RCTL, KC_SPC,  MO(_L1), KC_MINS, KC_QUOT, KC_ENT
  ),
  [_DV] = LAYOUT( /* Dvorak */
    KC_QUOT, KC_COMM, KC_DOT,  KC_P,    KC_Y,                      KC_F,    KC_G,    KC_C,    KC_R,    KC_L,
    KC_A,    KC_O,    KC_E,    KC_U,    KC_I,                      KC_D,    KC_H,    KC_T,    KC_N,    KC_S,
    KC_SCLN, KC_Q,    KC_J,    KC_K,    KC_X,                      KC_B,    KC_M,    KC_W,    KC_V,    KC_Z,
    KC_ESC,  KC_TAB,  KC_LGUI, KC_LSFT, KC_BSPC, KC_LALT, KC_RCTL, KC_SPC,  MO(_L1), KC_MINS, KC_SLSH, KC_ENT
  ),
  [_L1] = LAYOUT( /* LAYER 1 */
    KC_INS,  KC_HOME, KC_UP,   KC_END,  KC_PGUP,                   KC_VOLU, KC_7,    KC_8,   KC_9, KC_LBRC,
    KC_DEL,  KC_LEFT, KC_DOWN, KC_RGHT, KC_PGDN,                   KC_VOLD, KC_4,    KC_5,   KC_6, KC_RBRC,
    KC_GRV,  KC_MPRV, KC_MPLY, KC_MNXT, KC_MINS,                   KC_MUTE, KC_1,    KC_2,   KC_3, KC_BSLS,
    TG(_L2), KC_APP,  KC_LGUI, KC_LSFT, KC_BSPC, KC_LALT, KC_RCTL, KC_SPC,  KC_TRNS, KC_DOT, KC_0, KC_EQL
  ),
  [_L2] = LAYOUT( /* LAYER 2 */
    KC_TRNS, KC_WH_L, KC_MS_U, KC_WH_R, KC_WH_U,                   DF(_QW), KC_F7,   KC_F8,   KC_F9,   KC_F10,
    KC_TRNS, KC_MS_L, KC_MS_D, KC_MS_R, KC_WH_D,                   DF(_CM), KC_F6,   KC_F5,   KC_F6,   KC_F11,
    KC_BTN4, KC_BTN1, KC_BTN2, KC_BTN3, KC_BTN4,                   DF(_DV), KC_F1,   KC_F2,   KC_F3,   KC_F12,
    KC_TRNS, KC_TRNS, KC_LGUI, KC_LSFT, KC_BSPC, KC_LALT, KC_RCTL, KC_SPC,  KC_TRNS, KC_TRNS, KC_TRNS, RESET
  ),
};