| /* ---------------------------------------------------------------------------- | |
| * ATMEL Microcontroller Software Support | |
| * ---------------------------------------------------------------------------- | |
| * Copyright (c) 2008, Atmel Corporation | |
| * | |
| * All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * - Redistributions of source code must retain the above copyright notice, | |
| * this list of conditions and the disclaimer below. | |
| * | |
| * Atmel's name may not be used to endorse or promote products derived from | |
| * this software without specific prior written permission. | |
| * | |
| * DISCLAIMER: 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 | |
| * 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 | |
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| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| * ---------------------------------------------------------------------------- | |
| */ | |
| /* | |
| Title: LED implementation | |
| About: Purpose | |
| Implementation of LED-related functionalities. | |
| */ | |
| //------------------------------------------------------------------------------ | |
| // Headers | |
| //------------------------------------------------------------------------------ | |
| #include "led.h" | |
| #include <board.h> | |
| #include <pio/pio.h> | |
| //------------------------------------------------------------------------------ | |
| // Internal variables | |
| //------------------------------------------------------------------------------ | |
| #ifdef PINS_LEDS | |
| static const Pin pinsLeds[] = {PINS_LEDS}; | |
| static const unsigned int numLeds = PIO_LISTSIZE(pinsLeds); | |
| #endif | |
| //------------------------------------------------------------------------------ | |
| // Exported functions | |
| //------------------------------------------------------------------------------ | |
| /* | |
| Function: LED_Configure | |
| Configures the pin associated with the given LED number. | |
| Parameters: | |
| led - Number of the LED to configure. | |
| Returns: | |
| 1 if the LED exists and has been configured; otherwise 0. | |
| */ | |
| unsigned char LED_Configure(unsigned int led) | |
| { | |
| #ifdef PINS_LEDS | |
| // Check that LED exists | |
| if (led >= numLeds) { | |
| return 0; | |
| } | |
| // Configure LED | |
| return (PIO_Configure(&pinsLeds[led], 1)); | |
| #else | |
| return 0; | |
| #endif | |
| } | |
| /* | |
| Function: LED_Set | |
| Turns a LED on. | |
| Parameters: | |
| led - Number of the LED to turn on. | |
| Returns: | |
| 1 if the LED has been turned on; 0 otherwise. | |
| */ | |
| unsigned char LED_Set(unsigned int led) | |
| { | |
| #ifdef PINS_LEDS | |
| // Check if LED exists | |
| if (led >= numLeds) { | |
| return 0; | |
| } | |
| // Turn LED on | |
| if (pinsLeds[led].type == PIO_OUTPUT_0) { | |
| PIO_Set(&pinsLeds[led]); | |
| } | |
| else { | |
| PIO_Clear(&pinsLeds[led]); | |
| } | |
| return 1; | |
| #else | |
| return 0; | |
| #endif | |
| } | |
| /* | |
| Function: LED_Clear | |
| Turns a LED off. | |
| Parameters: | |
| led - Number of the LED to turn off. | |
| Returns: | |
| 1 if the LED has been turned off; 0 otherwise. | |
| */ | |
| unsigned char LED_Clear(unsigned int led) | |
| { | |
| #ifdef PINS_LEDS | |
| // Check if LED exists | |
| if (led >= numLeds) { | |
| return 0; | |
| } | |
| // Turn LED off | |
| if (pinsLeds[led].type == PIO_OUTPUT_0) { | |
| PIO_Clear(&pinsLeds[led]); | |
| } | |
| else { | |
| PIO_Set(&pinsLeds[led]); | |
| } | |
| return 1; | |
| #else | |
| return 0; | |
| #endif | |
| } | |
| /* | |
| Function: LED_Toggle | |
| Toggles the current state of a LED. | |
| Parameters: | |
| led - Number of the LED to toggle. | |
| Returns: | |
| 1 if the LED has been toggled; otherwise 0. | |
| */ | |
| unsigned char LED_Toggle(unsigned int led) | |
| { | |
| #ifdef PINS_LEDS | |
| // Check if LED exists | |
| if (led >= numLeds) { | |
| return 0; | |
| } | |
| // Toggle LED | |
| if (PIO_GetOutputDataStatus(&pinsLeds[led])) { | |
| PIO_Clear(&pinsLeds[led]); | |
| } | |
| else { | |
| PIO_Set(&pinsLeds[led]); | |
| } | |
| return 1; | |
| #else | |
| return 0; | |
| #endif | |
| } | |