4 * \brief API driver for component aat31xx.
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6 * Copyright (c) 2011-2013 Atmel Corporation. All rights reserved.
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12 * Redistribution and use in source and binary forms, with or without
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13 * modification, are permitted provided that the following conditions are met:
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15 * 1. Redistributions of source code must retain the above copyright notice,
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16 * this list of conditions and the following disclaimer.
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18 * 2. Redistributions in binary form must reproduce the above copyright notice,
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19 * this list of conditions and the following disclaimer in the documentation
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20 * and/or other materials provided with the distribution.
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22 * 3. The name of Atmel may not be used to endorse or promote products derived
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23 * from this software without specific prior written permission.
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25 * 4. This software may only be redistributed and used in connection with an
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26 * Atmel microcontroller product.
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28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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38 * POSSIBILITY OF SUCH DAMAGE.
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45 * \defgroup aat31xx_display_group Display - AAT31XX Controller
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47 * Low-level driver for the AAT31XX LCD backlight controller. This driver provides access to the main
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48 * features of the AAT31XX controller.
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55 #include "aat31xx.h"
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56 #include "conf_aat31xx.h"
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66 #define DELAY_PULSE (0x18u)
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67 #define DELAY_ENABLE (0x20000u)
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68 #define DELAY_DISABLE (0x20000u)
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71 * \brief Set the LCD backlight level.
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73 * \param ul_level backlight level.
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75 * \note pin BOARD_AAT31XX_SET_GPIO must be configured before calling aat31xx_set_backlight.
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77 void aat31xx_set_backlight(uint32_t ul_level)
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79 volatile uint32_t ul_delay;
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82 #ifdef CONF_BOARD_AAT3155
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83 ul_level = AAT31XX_MAX_BACKLIGHT_LEVEL - ul_level + 1;
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86 #ifdef CONF_BOARD_AAT3193
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87 ul_level = AAT31XX_MAX_BACKLIGHT_LEVEL - ul_level + 1;
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90 /* Ensure valid level */
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91 ul_level = (ul_level > AAT31XX_MAX_BACKLIGHT_LEVEL) ? AAT31XX_MAX_BACKLIGHT_LEVEL : ul_level;
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92 ul_level = (ul_level < AAT31XX_MIN_BACKLIGHT_LEVEL) ? AAT31XX_MIN_BACKLIGHT_LEVEL : ul_level;
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94 /* Set new backlight level */
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95 for (i = 0; i < ul_level; i++) {
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96 ioport_set_pin_level(BOARD_AAT31XX_SET_GPIO, IOPORT_PIN_LEVEL_LOW);
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97 ul_delay = DELAY_PULSE;
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98 while (ul_delay--) {
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101 ioport_set_pin_level(BOARD_AAT31XX_SET_GPIO, IOPORT_PIN_LEVEL_HIGH);
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103 ul_delay = DELAY_PULSE;
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104 while (ul_delay--) {
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108 ul_delay = DELAY_ENABLE;
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109 while (ul_delay--) {
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114 * \brief Switch off backlight.
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116 void aat31xx_disable_backlight(void)
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118 volatile uint32_t ul_delay;
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120 ioport_set_pin_level(BOARD_AAT31XX_SET_GPIO, IOPORT_PIN_LEVEL_LOW);
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122 ul_delay = DELAY_DISABLE;
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123 while (ul_delay--) {
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