qmk-firmware/keyboards/lefty/lefty.c

/* Copyright 2021 Smoll Chungus (@smollchungus)
*
* 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"

#ifdef OLED_ENABLE
bool oled_task_kb(void) {
    if (!oled_task_user()) {
        return false;
    }
    // Host Keyboard Layer Status
    oled_write_P(PSTR("Layer: "), false);

    switch (get_highest_layer(layer_state)) {
        case 0:
            oled_write_P(PSTR("Default\n"), false);
            break;
        case 1:
            oled_write_P(PSTR("LOWER\n"), false);
            break;
        case 2:
            oled_write_P(PSTR("RAISE\n"), false);
            break;
        case 3:
            oled_write_P(PSTR("SPECIAL\n"), false);
            break;
        default:
            // Or use the write_ln shortcut over adding '\n' to the end of your string
            oled_write_ln_P(PSTR("Undefined"), false);
    }

    return true;
}
#endif