qmk_firmware/keyboards/boardsource/unicorne/unicorne.c

// Copyright 2023 jack (@waffle87)
// SPDX-License-Identifier: GPL-2.0-or-later
#include "unicorne.h"

#ifdef OLED_ENABLE
oled_rotation_t oled_init_kb(oled_rotation_t rotation) {
    if (!is_keyboard_master()) {
        return OLED_ROTATION_180;
    }
    return rotation;
}

bool oled_task_kb(void) {
    if (!oled_task_user()) {
        return false;
    }
    if (is_keyboard_master()) {
        switch (get_highest_layer(layer_state)) {
            case 0:
                oled_write_raw(layer_zero, sizeof(layer_zero));
                break;
            case 1:
                oled_write_raw(layer_one, sizeof(layer_one));
                break;
            case 2:
                oled_write_raw(layer_two, sizeof(layer_two));
                break;
            case 3:
                oled_write_raw(layer_three, sizeof(layer_three));
                break;
        }
    } else {
        oled_write_raw(logo, sizeof(logo));
    }
    return false;
}
#endif