924556c0a7
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20295 a1c6a512-1295-4272-9138-f99709370657
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Thomas Martitz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef BACKLIGHT_SW_FADING_H
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#define BACKLIGHT_SW_FADING_H
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/* total fading time will be current brightness level * FADE_DELAY * 10ms */
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#if (MAX_BRIGHTNESS_SETTING >= 25)
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#define FADE_DELAY 2 /* =HZ/50 => 20ms */
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#elif (MAX_BRIGHTNESS_SETTING >= 16)
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#define FADE_DELAY 3 /* =HZ/33 => 30ms */
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#else
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#define FADE_DELAY 4 /* =HZ/25 => 40ms*/
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#endif
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void _backlight_fade_update_state(int brightness);
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bool _backlight_fade_step(int direction);
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/* enum used for both, fading state and fading type selected through the settings */
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enum {
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NOT_FADING = 0,
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FADING_UP,
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FADING_DOWN,
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};
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#endif /* BACKLIGHT_SW_FADING_H */
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