| /** | |
| * \file | |
| * | |
| * \brief API driver for component aat31xx. | |
| * | |
| * Copyright (c) 2011-2013 Atmel Corporation. All rights reserved. | |
| * | |
| * \asf_license_start | |
| * | |
| * \page License | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * 1. Redistributions of source code must retain the above copyright notice, | |
| * this list of conditions and the following disclaimer. | |
| * | |
| * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| * this list of conditions and the following disclaimer in the documentation | |
| * and/or other materials provided with the distribution. | |
| * | |
| * 3. The name of Atmel may not be used to endorse or promote products derived | |
| * from this software without specific prior written permission. | |
| * | |
| * 4. This software may only be redistributed and used in connection with an | |
| * Atmel microcontroller product. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED | |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
| * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR | |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| * POSSIBILITY OF SUCH DAMAGE. | |
| * | |
| * \asf_license_stop | |
| * | |
| */ | |
| /** | |
| * \defgroup aat31xx_display_group Display - AAT31XX Controller | |
| * | |
| * Low-level driver for the AAT31XX LCD backlight controller. This driver provides access to the main | |
| * features of the AAT31XX controller. | |
| * | |
| * \{ | |
| */ | |
| #include "board.h" | |
| #include "ioport.h" | |
| #include "aat31xx.h" | |
| #include "conf_aat31xx.h" | |
| /// @cond 0 | |
| /**INDENT-OFF**/ | |
| #ifdef __cplusplus | |
| extern "C" { | |
| #endif | |
| /**INDENT-ON**/ | |
| /// @endcond | |
| #define DELAY_PULSE (0x18u) | |
| #define DELAY_ENABLE (0x20000u) | |
| #define DELAY_DISABLE (0x20000u) | |
| /** | |
| * \brief Set the LCD backlight level. | |
| * | |
| * \param ul_level backlight level. | |
| * | |
| * \note pin BOARD_AAT31XX_SET_GPIO must be configured before calling aat31xx_set_backlight. | |
| */ | |
| void aat31xx_set_backlight(uint32_t ul_level) | |
| { | |
| volatile uint32_t ul_delay; | |
| uint32_t i; | |
| #ifdef CONF_BOARD_AAT3155 | |
| ul_level = AAT31XX_MAX_BACKLIGHT_LEVEL - ul_level + 1; | |
| #endif | |
| #ifdef CONF_BOARD_AAT3193 | |
| ul_level = AAT31XX_MAX_BACKLIGHT_LEVEL - ul_level + 1; | |
| #endif | |
| /* Ensure valid level */ | |
| ul_level = (ul_level > AAT31XX_MAX_BACKLIGHT_LEVEL) ? AAT31XX_MAX_BACKLIGHT_LEVEL : ul_level; | |
| ul_level = (ul_level < AAT31XX_MIN_BACKLIGHT_LEVEL) ? AAT31XX_MIN_BACKLIGHT_LEVEL : ul_level; | |
| /* Set new backlight level */ | |
| for (i = 0; i < ul_level; i++) { | |
| ioport_set_pin_level(BOARD_AAT31XX_SET_GPIO, IOPORT_PIN_LEVEL_LOW); | |
| ul_delay = DELAY_PULSE; | |
| while (ul_delay--) { | |
| } | |
| ioport_set_pin_level(BOARD_AAT31XX_SET_GPIO, IOPORT_PIN_LEVEL_HIGH); | |
| ul_delay = DELAY_PULSE; | |
| while (ul_delay--) { | |
| } | |
| } | |
| ul_delay = DELAY_ENABLE; | |
| while (ul_delay--) { | |
| } | |
| } | |
| /** | |
| * \brief Switch off backlight. | |
| */ | |
| void aat31xx_disable_backlight(void) | |
| { | |
| volatile uint32_t ul_delay; | |
| ioport_set_pin_level(BOARD_AAT31XX_SET_GPIO, IOPORT_PIN_LEVEL_LOW); | |
| ul_delay = DELAY_DISABLE; | |
| while (ul_delay--) { | |
| } | |
| } | |
| /// @cond 0 | |
| /**INDENT-OFF**/ | |
| #ifdef __cplusplus | |
| } | |
| #endif | |
| /**INDENT-ON**/ | |
| /// @endcond | |
| /** | |
| * \} | |
| */ |