qmk_firmware/keyboards/lime/rev1/rev1.c

 /* Copyright 2021 HellSingCoder
  *
  * 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 "quantum.h"

/* Encoders */
#ifdef ENCODER_ENABLE
    bool encoder_update_user(uint8_t index, bool clockwise) {

        if (index == 0) {
            if (clockwise) {
                tap_code(KC_MNXT);
            } else {
                tap_code(KC_MPRV);
            }
        } else if (index == 1) {
            if (clockwise) {
                tap_code(KC_VOLU);
            } else {
                tap_code(KC_VOLD);
            }
        }
        return false;
    }
#endif