6abae1f124
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20793 a1c6a512-1295-4272-9138-f99709370657
76 lines
2.2 KiB
C
76 lines
2.2 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) 2006 by Linus Nielsen Feltzing
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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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#include "config.h"
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#include "cpu.h"
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#include "system.h"
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#include "backlight.h"
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#include "backlight-target.h"
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#include "pcf50606.h"
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#include "lcd.h"
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bool _backlight_init(void)
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{
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_backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
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_backlight_on();
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return true; /* Backlight always ON after boot. */
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}
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void _backlight_on(void)
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{
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int level;
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#ifdef HAVE_LCD_ENABLE
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lcd_enable(true); /* power on lcd + visible display */
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#endif
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level = disable_irq_save();
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pcf50606_write(0x38, 0xb0); /* Backlight ON, GPO1INV=1, GPO1ACT=011 */
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restore_irq(level);
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}
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void _backlight_off(void)
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{
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int level = disable_irq_save();
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pcf50606_write(0x38, 0x80); /* Backlight OFF, GPO1INV=1, GPO1ACT=000 */
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restore_irq(level);
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#ifdef HAVE_LCD_ENABLE
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lcd_enable(false); /* power off visible display */
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#endif
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}
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/* set brightness by changing the PWM */
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void _backlight_set_brightness(int val)
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{
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/* disable IRQs while bitbanging */
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int old_irq_level = disable_irq_save();
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pcf50606_write(0x35, (val << 1) | 0x01); /* 512Hz, Enable PWM */
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/* enable IRQs again */
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restore_irq(old_irq_level);
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}
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void _remote_backlight_on(void)
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{
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and_l(~0x00200000, &GPIO_OUT);
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}
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void _remote_backlight_off(void)
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{
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or_l(0x00200000, &GPIO_OUT);
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}
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