1 files changed, 46 insertions, 0 deletions

diff --git a/firmware/export/backlight-sw-fading.h b/firmware/export/backlight-sw-fading.h
new file mode 100644
index 0000000000..54f732709a
--- /dev/null
+++ b/firmware/export/backlight-sw-fading.h
@@ -0,0 +1,46 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Thomas Martitz
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef BACKLIGHT_THREAD_FADING_H
+#define BACKLIGHT_THREAD_FADING_H
+
+#include "config.h"
+
+#ifdef USE_BACKLIGHT_SW_FADING
+
+/* delay supposed to be MAX_BRIGHTNESS_SETTING*2 rounded to the next multiple
+ * of 5, however not more than 40 */
+#define _FADE_DELAY (((MAX_BRIGHTNESS_SETTING*2+4)/5)*5)
+#define FADE_DELAY (HZ/(MIN(_FADE_DELAY, 40)))
+
+void _backlight_fade_update_state(int brightness);
+bool _backlight_fade_step(int direction);
+
+/* enum used for both, fading state and fading type selected through the settings */
+
+enum {
+    NOT_FADING = 0,
+    FADING_UP,
+    FADING_DOWN,
+};
+#endif /* USE_BACKLIGHT_SW_FADING */
+
+#endif /* _BACKLIGHT_THREAD_FADING_ */