916a9f0969
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29231 a1c6a512-1295-4272-9138-f99709370657
108 lines
3 KiB
C
108 lines
3 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) 2007 by Karl Kurbjun
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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-target.h"
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#include "backlight.h"
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#include "lcd.h"
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#include "power.h"
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#include "spi-target.h"
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#include "lcd-target.h"
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short read_brightness = 0x0;
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static const char commands [][2] =
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{ {0xA0, 0x00},
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{0xA1, 0x00},
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{0xA2, 0x00},
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{0xA3, 0x00},
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{0xA4, 0x00},
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{0xA5, 0x00},
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{0xA6, 0x00},
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{0xA7, 0x00},
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{0xA8, 0x00},
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{0xB9, 0x40},
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};
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static void _backlight_write_brightness(int brightness)
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{
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uint8_t bl_command[] = {0xA4, 0x00, brightness, 0xA4};
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spi_block_transfer(SPI_target_BACKLIGHT, commands[8], 2, (char *)&read_brightness, 2);
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// bl_command[3] = (char) read_brightness;
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spi_block_transfer(SPI_target_BACKLIGHT, bl_command, 4, 0, 0);
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}
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void _backlight_on(void)
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{
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lcd_awake(); /* power on lcd + visible display */
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#if (CONFIG_BACKLIGHT_FADING == BACKLIGHT_NO_FADING)
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_backlight_write_brightness(backlight_brightness);
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#endif
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}
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void _backlight_off(void)
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{
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_backlight_write_brightness(0);
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}
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/* Assumes that the backlight has been initialized */
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void _backlight_set_brightness(int brightness)
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{
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_backlight_write_brightness(brightness);
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}
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void __backlight_dim(bool dim_now)
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{
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_backlight_set_brightness(dim_now ?
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DEFAULT_BRIGHTNESS_SETTING :
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DEFAULT_DIMNESS_SETTING);
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}
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bool _backlight_init(void)
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{
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short read_value;
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IO_GIO_BITCLR2 = (1 << 5); /* output low (backlight/lcd on) */
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spi_block_transfer(SPI_target_BACKLIGHT, commands[6], 2, 0, 0);
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spi_block_transfer(SPI_target_BACKLIGHT, commands[8], 2, (char*)&read_value, 2);
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if( (read_value & 0xFF) < 0xD0 )
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{
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spi_block_transfer(SPI_target_BACKLIGHT, commands[3], 2, 0, 0);
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spi_block_transfer(SPI_target_BACKLIGHT, commands[4], 2, 0, 0);
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spi_block_transfer(SPI_target_BACKLIGHT, commands[9], 2, 0, 0);
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spi_block_transfer(SPI_target_BACKLIGHT, commands[0], 2, 0, 0);
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}
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spi_block_transfer(SPI_target_BACKLIGHT, commands[2], 2, 0, 0);
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_backlight_set_brightness(backlight_brightness);
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return true;
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}
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