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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Marcin Bukat
*
* 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.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "kernel.h"
#include "system.h"
#include "backlight.h"
#include "backlight-target.h"
#include "lcd.h"
static bool backlight_hw_on = true;
static int _brightness = DEFAULT_BRIGHTNESS_SETTING;
/* Returns the current state of the backlight (true=ON, false=OFF). */
bool backlight_hw_init(void)
{
#ifdef BOOTLOADER
and_l(~(1<<28),&GPIO_OUT);
#endif
or_l((1<<28),&GPIO_FUNCTION);
or_l((1<<28),&GPIO_ENABLE);
return true;
}
void _backlight_hw_on(void)
{
#ifndef BOOTLOADER
if (backlight_hw_on)
return;
#endif
backlight_hw_brightness(_brightness);
backlight_hw_on = true;
}
void _backlight_hw_off(void)
{
/* GPIO28 low */
and_l(~(1<<28),&GPIO_OUT);
backlight_hw_on = false;
}
void backlight_hw_brightness(int val)
{
unsigned char i;
#ifndef BOOTLOADER
if( _brightness == val && backlight_hw_on == true )
return;
#endif
and_l(~(1<<28),&GPIO_OUT);
sleep(4);
for (i=0;i<val;i++)
{
or_l((1<<28),&GPIO_OUT);
and_l(~(1<<28),&GPIO_OUT);
}
or_l((1<<28),&GPIO_OUT);
_brightness = val;
}
void remote_backlight_hw_on(void)
{
/* I don't have remote to play with */
}
void remote_backlight_hw_off(void)
{
/* I don't have remote to play with */
}
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