mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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187 lines
4.6 KiB
C
187 lines
4.6 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/*
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Title: LED implementation
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About: Purpose
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Implementation of LED-related functionalities.
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*/
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include "led.h"
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#include <board.h>
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#include <pio/pio.h>
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//------------------------------------------------------------------------------
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// Internal variables
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//------------------------------------------------------------------------------
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#ifdef PINS_LEDS
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static const Pin pinsLeds[] = {PINS_LEDS};
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static const unsigned int numLeds = PIO_LISTSIZE(pinsLeds);
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#endif
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//------------------------------------------------------------------------------
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// Exported functions
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//------------------------------------------------------------------------------
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/*
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Function: LED_Configure
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Configures the pin associated with the given LED number.
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Parameters:
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led - Number of the LED to configure.
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Returns:
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1 if the LED exists and has been configured; otherwise 0.
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*/
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unsigned char LED_Configure(unsigned int led)
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{
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#ifdef PINS_LEDS
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// Check that LED exists
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if (led >= numLeds) {
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return 0;
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}
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// Configure LED
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return (PIO_Configure(&pinsLeds[led], 1));
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#else
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return 0;
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#endif
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}
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/*
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Function: LED_Set
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Turns a LED on.
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Parameters:
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led - Number of the LED to turn on.
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Returns:
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1 if the LED has been turned on; 0 otherwise.
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*/
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unsigned char LED_Set(unsigned int led)
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{
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#ifdef PINS_LEDS
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// Check if LED exists
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if (led >= numLeds) {
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return 0;
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}
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// Turn LED on
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if (pinsLeds[led].type == PIO_OUTPUT_0) {
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PIO_Set(&pinsLeds[led]);
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}
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else {
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PIO_Clear(&pinsLeds[led]);
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}
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return 1;
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#else
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return 0;
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#endif
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}
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/*
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Function: LED_Clear
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Turns a LED off.
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Parameters:
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led - Number of the LED to turn off.
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Returns:
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1 if the LED has been turned off; 0 otherwise.
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*/
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unsigned char LED_Clear(unsigned int led)
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{
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#ifdef PINS_LEDS
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// Check if LED exists
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if (led >= numLeds) {
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return 0;
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}
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// Turn LED off
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if (pinsLeds[led].type == PIO_OUTPUT_0) {
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PIO_Clear(&pinsLeds[led]);
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}
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else {
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PIO_Set(&pinsLeds[led]);
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}
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return 1;
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#else
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return 0;
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#endif
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}
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/*
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Function: LED_Toggle
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Toggles the current state of a LED.
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Parameters:
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led - Number of the LED to toggle.
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Returns:
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1 if the LED has been toggled; otherwise 0.
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*/
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unsigned char LED_Toggle(unsigned int led)
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{
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#ifdef PINS_LEDS
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// Check if LED exists
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if (led >= numLeds) {
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return 0;
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}
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// Toggle LED
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if (PIO_GetOutputDataStatus(&pinsLeds[led])) {
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PIO_Clear(&pinsLeds[led]);
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}
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else {
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PIO_Set(&pinsLeds[led]);
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}
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return 1;
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#else
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return 0;
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#endif
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}
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