qmk_firmware/keyboards/viktus/sp_mini/sp_mini.c

 /* Copyright 2021 jrfhoutx
  *
  * 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"

void keyboard_pre_init_kb(void) {
    // enable built in pullups to avoid timeouts when right hand not connected
    setPinInputHigh(D0);
    setPinInputHigh(D1);

    keyboard_pre_init_user();
}

#ifdef ENCODER_ENABLE
bool encoder_update_kb(uint8_t index, bool clockwise) {
    if (!encoder_update_user(index, clockwise)) { return false; }
    if (index == 0) { /* First encoder */
        if (clockwise) {
            tap_code(KC_PGDN);
        } else {
            tap_code(KC_PGUP);
        }
    } else if (index == 1) { /* Second encoder */
        if (clockwise) {
        tap_code(KC_VOLU);
    } else {
        tap_code(KC_VOLD);
        }
    }
    return true;
}
#endif