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/* ----------------------------------------------------------------------------
* 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
* 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.
* ----------------------------------------------------------------------------
*/
/*
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
}
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