70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
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/***************************************************************************
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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) 2013 by Amaury Pouly
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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 "system.h"
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#include "backlight.h"
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#include "lcd.h"
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#include "backlight-target.h"
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#include "uartdbg-imx233.h"
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#include "pinctrl-imx233.h"
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void _backlight_set_brightness(int level)
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{
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unsigned val = (level + 200) * level / 1000;
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if(level != 0)
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{
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for(unsigned mask = 0x10; mask; mask >>= 1)
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imx233_uartdbg_send((val & mask) ? 0xff : 0xf8);
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imx233_uartdbg_send(0);
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imx233_pinctrl_set_gpio(1, 12, true);
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}
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else
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imx233_pinctrl_set_gpio(1, 12, false);
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}
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bool _backlight_init(void)
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{
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imx233_pinctrl_acquire(1, 12, "backlight_enable");
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imx233_pinctrl_set_function(1, 12, PINCTRL_FUNCTION_GPIO);
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imx233_pinctrl_enable_gpio(1, 12, true);
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imx233_uartdbg_init(BAUD_38400);
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return true;
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}
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void _backlight_on(void)
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{
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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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/* restore the previous backlight level */
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_backlight_set_brightness(backlight_brightness);
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}
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void _backlight_off(void)
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{
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/* there is no real on/off but we can set to 0 brightness */
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_backlight_set_brightness(0);
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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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