qmk_firmware/keyboards/handwired/atreus50/keymaps/default/keymap.c

#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.
enum layer_names {
    _QWERTY,
    _COLEMAK,
    _DVORAK,
    _LOWER,
    _RAISE,
    _MOVEMENT,
    _ADJUST,
};

enum custom_keycodes {
  QWERTY = SAFE_RANGE,
  COLEMAK,
  DVORAK,
  LOWER,
  RAISE,
  MOVEMENT,
  BACKLIT
};

// Fillers to make layering more clear
#define X0 MT(MOD_LCTL, KC_ESC)  // Hold for Left Ctrl, Tap for ESC
#define X3 MO(_MOVEMENT)
#define X4 MT(MOD_LSFT, KC_ENT)  // Hold for Left Shift, Tap for Enter

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

  [_QWERTY] = LAYOUT(
    KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                      KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_MINS,
    X0,      KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                      KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
    KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                      KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, X4,
    KC_GRV,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  X3,      KC_RSFT, KC_BSPC, RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
  ),

  [_COLEMAK] = LAYOUT(
    KC_TAB,  KC_Q,    KC_W,    KC_F,    KC_P,    KC_G,                      KC_J,    KC_L,    KC_U,    KC_Y,    KC_SCLN, KC_MINS,
    X0,      KC_A,    KC_R,    KC_S,    KC_T,    KC_D,                      KC_H,    KC_N,    KC_E,    KC_I,    KC_O,    KC_QUOT,
    KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                      KC_K,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, X4,
    KC_GRV,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  X3,      KC_RSFT, KC_BSPC, RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
  ),

  [_DVORAK] = LAYOUT(
    KC_TAB,  KC_QUOT, KC_COMM, KC_DOT,  KC_P,    KC_Y,                      KC_F,    KC_G,    KC_C,    KC_R,    KC_L,    KC_MINS,
    X0,      KC_A,    KC_O,    KC_E,    KC_U,    KC_I,                      KC_D,    KC_H,    KC_T,    KC_N,    KC_S,    KC_SLSH,
    KC_LSFT, KC_SCLN, KC_Q,    KC_J,    KC_K,    KC_X,                      KC_B,    KC_M,    KC_W,    KC_V,    KC_Z,    X4,
    KC_GRV,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  X3,      KC_RSFT, KC_BSPC, RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
  ),

  [_LOWER] = LAYOUT(
    KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC,                   KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_DEL,
    KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                     KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
    _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,                    KC_F12,  KC_END,  _______, _______, _______, _______,
    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
  ),

  [_RAISE] = LAYOUT(
    KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                      KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_DEL,
    KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                     KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS,
    _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,                    KC_F12,  KC_NUHS, KC_NUBS, _______, _______, _______,
    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
  ),

  [_MOVEMENT] = LAYOUT(
    KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC,                   KC_CIRC, KC_AMPR, KC_UP,   KC_LPRN, KC_RPRN, KC_DEL,
    KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                     KC_F6,   KC_LEFT, KC_DOWN, KC_RGHT, KC_RCBR, KC_PIPE,
    _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,                    KC_F12,  KC_END,  _______, _______, _______, _______,
    _______, _______, _______, _______, _______, _______, _______, _______, KC_PGDN, KC_PGUP, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
  ),

/* Adjust (Lower + Raise)
 * |------+------+------+------+------+------.             ,------+------+------+------+------+------|
 * |      | Reset|      |      |      |      |             |      |      |      |      |      |  Del |
 * |------+------+------+------+------+------|             |------+------+------+------+------+------|
 * |      |      |      |Audoff|Aud on|AGnorm|             |AGswap|Qwerty|Colemk|Dvorak|      |      |
 * |------+------+------+------+------+------|             |------+------+------+------+------+------|
 * |      |Voice-|Voice+|Musoff|Mus on|      |             |      |      |      |      |      |      |
 * |------+------+------+------+------+------+------+------+------+------+------+------+------+------|
 * |      |      |      |      |      |      |      |      |      |      |      |      |      |      |
 * `-------------------------------------------------------------------------------------------------'
 */
  [_ADJUST] = LAYOUT(
    _______, QK_BOOT, RGB_TOG, RGB_MOD, RGB_HUD, RGB_HUI,                   RGB_SAD, RGB_SAI, RGB_VAD, RGB_VAI, _______, KC_DEL,
    _______, _______, _______, AU_ON,   AU_OFF,  AG_NORM,                   AG_SWAP, QWERTY,  COLEMAK, DVORAK,  _______, _______,
    _______, AU_PREV, AU_NEXT, MU_ON,   MU_OFF,  MI_ON,                     MI_OFF,  _______, _______, _______, _______, _______,
    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
  )

};

#ifdef AUDIO_ENABLE
// float tone_startup[][2] = {
//   {NOTE_B5, 20},
//   {NOTE_B6, 8},
//   {NOTE_DS6, 20},
//   {NOTE_B6, 8}
// };

float tone_qwerty[][2]     = SONG(QWERTY_SOUND);
float tone_dvorak[][2]     = SONG(DVORAK_SOUND);
float tone_colemak[][2]    = SONG(COLEMAK_SOUND);

#endif

void persistent_default_layer_set(uint16_t default_layer) {
  eeconfig_update_default_layer(default_layer);
  default_layer_set(default_layer);
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  switch (keycode) {
        case QWERTY:
          if (record->event.pressed) {
            #ifdef AUDIO_ENABLE
              PLAY_SONG(tone_qwerty);
            #endif
            persistent_default_layer_set(1UL<<_QWERTY);
          }
          return false;
          break;
        case COLEMAK:
          if (record->event.pressed) {
            #ifdef AUDIO_ENABLE
              PLAY_SONG(tone_colemak);
            #endif
            persistent_default_layer_set(1UL<<_COLEMAK);
          }
          return false;
          break;
        case DVORAK:
          if (record->event.pressed) {
            #ifdef AUDIO_ENABLE
              PLAY_SONG(tone_dvorak);
            #endif
            persistent_default_layer_set(1UL<<_DVORAK);
          }
          return false;
          break;
        case LOWER:
          if (record->event.pressed) {
            layer_on(_LOWER);
            update_tri_layer(_LOWER, _RAISE, _ADJUST);
          } else {
            layer_off(_LOWER);
            update_tri_layer(_LOWER, _RAISE, _ADJUST);
          }
          return false;
          break;
        case RAISE:
          if (record->event.pressed) {
            layer_on(_RAISE);
            update_tri_layer(_LOWER, _RAISE, _ADJUST);
          } else {
            layer_off(_RAISE);
            update_tri_layer(_LOWER, _RAISE, _ADJUST);
          }
          return false;
          break;
        case BACKLIT:
          if (record->event.pressed) {
            register_code(KC_RSFT);
            #ifdef BACKLIGHT_ENABLE
              backlight_step();
            #endif
          } else {
            unregister_code(KC_RSFT);
          }
          return false;
          break;
      }
    return true;
};