qmk_firmware/keyboards/latin47ble/keymaps/via/keymap.c

 /* Copyright 2020 haierwangwei2005
  * 
  * This program is free software: you can redistribute it and/or modify 
  * it under the terms of the GNU General Public License as published by 
  * the Free Software Foundation, either version 2 of the License, or 
  * (at your option) any later version. 
  * 
  * This program is distributed in the hope that it will be useful, 
  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
  * GNU General Public License for more details. 
  * 
  * You should have received a copy of the GNU General Public License 
  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
  */ 
#include QMK_KEYBOARD_H

enum layers {
    _QWERTY,
    _FN1,
    _FN2,
};

#define KC_X0 LT(_FN2, KC_CAPS)
#define KC_X1 MO(_FN1)
#define KC_X2 MO(_FN2)


   const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [_QWERTY] = LAYOUT_planck_mit(
        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_X0,   KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_ENT,
        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_X2,   KC_DEL,
        KC_LCTL, KC_LGUI, KC_LALT, KC_PGUP, KC_PGDN,     KC_SPC,       KC_X1,   KC_1,    KC_2,    KC_3,    KC_4
    ),
    [_FN1] = LAYOUT_planck_mit(
        OUT_AUTO, KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_EQL,
        KC_X0,    KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_ENT,
        KC_LSFT,  KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  RGB_TOG, KC_DEL,
        KC_LCTL,  KC_LGUI, KC_LALT, KC_PGUP, KC_PGDN,     KC_SPC,       KC_X1,   RGB_TOG, RGB_MOD, KC_MYCM, KC_CALC
    ),
    [_FN2] = LAYOUT_planck_mit(
        KC_NLCK, KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_BSPC,
        KC_X0,   KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_ENT,
        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  RGB_TOG, KC_DEL,
        KC_LCTL, KC_LGUI, KC_LALT, KC_PGUP, KC_PGDN,     KC_SPC,       KC_X1,   RGB_TOG, RGB_MOD, KC_MYCM, KC_CALC
    ),
    [3] = LAYOUT_planck_mit(
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______,     _______,      _______, _______, _______, _______, _______
    ),
};