qmk-firmware/keyboards/telophase/keymaps/default/keymap.c

// this is the style you want to emulate.
// This is the canonical layout file for the Quantum project. If you want to add another keyboard,

#include "telophase.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 telophase_layers
{
	_QWERTY,
	_LOWER,
	_RAISE,
	_ADJUST,
};

enum telophase_keycodes 
{
  LOWER = SAFE_RANGE,
  RAISE,
  ADJUST
};

#define LONGPRESS_DELAY 150
#define LAYER_TOGGLE_DELAY 300

// Fillers to make layering more clear
#define _______ KC_TRNS
#define XXXXXXX KC_NO

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[_QWERTY] = { /*QWERTY*/
	{KC_ESC,    KC_Q,      KC_W,    KC_E,    KC_R,    KC_T,      KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC },
	{KC_TAB,    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, KC_ENT  },
	{KC_LCTL,   KC_LGUI,   KC_LALT, ADJUST,  LOWER,   KC_SPC,    KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RIGHT }
},


[_LOWER] = { /*Lower*/
	{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,S(KC_NUHS),S(KC_NUBS),_______, _______, _______ },
 	{_______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY   }
},



[_RAISE] = { /*Raise*/
  	{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  }

},


[_ADJUST] = { /*Adjust*/
  	{_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______ },
  	{_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______ },
  	{_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______ },
  	{_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______ }

},
};

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  switch (keycode) {
    case LOWER:
      if (record->event.pressed) {
        layer_on(_LOWER);
      } else {
        layer_off(_LOWER);
      }
      return false;
      break;

    case RAISE:
      if (record->event.pressed) {
        layer_on(_RAISE);
      } else {
        layer_off(_RAISE);
      }
      return false;
      break;

     case ADJUST:
      if (record->event.pressed) {
        layer_on(_ADJUST);
      } else {
        layer_off(_ADJUST);
      }
      return false;
      break;

  }
  return true;
}

void matrix_scan_user(void) {
		return;
};