trezor-firmware/core/embed/lib/display_utils.c

/*
 * This file is part of the Trezor project, https://trezor.io/
 *
 * Copyright (c) SatoshiLabs
 *
 * 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 3 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 <trezor_rtl.h>

#include "display.h"
#include "systick.h"

void display_fade(int start, int end, int delay) {
#ifdef USE_BACKLIGHT
  for (int i = 0; i < 100; i++) {
    display_set_backlight(start + i * (end - start) / 100);
    hal_delay(delay / 100);
  }
  display_set_backlight(end);
#endif
}