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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Karl Kurbjun
*
* 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 "system.h"
#include "backlight-target.h"
#include "backlight.h"
#include "lcd.h"
#include "power.h"
#include "spi-target.h"
#include "lcd-target.h"
short read_brightness = 0x0;
static const char commands [][2] =
{ {0xA0, 0x00},
{0xA1, 0x00},
{0xA2, 0x00},
{0xA3, 0x00},
{0xA4, 0x00},
{0xA5, 0x00},
{0xA6, 0x00},
{0xA7, 0x00},
{0xA8, 0x00},
{0xB9, 0x40},
};
static void _backlight_write_brightness(int brightness)
{
uint8_t bl_command[] = {0xA4, 0x00, brightness, 0xA4};
spi_block_transfer(SPI_target_BACKLIGHT, commands[8], 2, (char *)&read_brightness, 2);
// bl_command[3] = (char) read_brightness;
spi_block_transfer(SPI_target_BACKLIGHT, bl_command, 4, 0, 0);
}
void _backlight_on(void)
{
lcd_awake(); /* power on lcd + visible display */
#if (CONFIG_BACKLIGHT_FADING == BACKLIGHT_NO_FADING)
_backlight_write_brightness(backlight_brightness);
#endif
}
void _backlight_off(void)
{
_backlight_write_brightness(0);
}
/* Assumes that the backlight has been initialized */
void _backlight_set_brightness(int brightness)
{
_backlight_write_brightness(brightness);
}
void __backlight_dim(bool dim_now)
{
_backlight_set_brightness(dim_now ?
DEFAULT_BRIGHTNESS_SETTING :
DEFAULT_DIMNESS_SETTING);
}
bool _backlight_init(void)
{
short read_value;
IO_GIO_BITCLR2 = (1 << 5); /* output low (backlight/lcd on) */
spi_block_transfer(SPI_target_BACKLIGHT, commands[6], 2, 0, 0);
spi_block_transfer(SPI_target_BACKLIGHT, commands[8], 2, (char*)&read_value, 2);
if( (read_value & 0xFF) < 0xD0 )
{
spi_block_transfer(SPI_target_BACKLIGHT, commands[3], 2, 0, 0);
spi_block_transfer(SPI_target_BACKLIGHT, commands[4], 2, 0, 0);
spi_block_transfer(SPI_target_BACKLIGHT, commands[9], 2, 0, 0);
spi_block_transfer(SPI_target_BACKLIGHT, commands[0], 2, 0, 0);
}
spi_block_transfer(SPI_target_BACKLIGHT, commands[2], 2, 0, 0);
_backlight_set_brightness(backlight_brightness);
return true;
}
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