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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_AT91SAM3U256_IAR/] [system/] [led.c] - Blame information for rev 675

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1 580 jeremybenn 
/* ----------------------------------------------------------------------------
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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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//         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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//         Local 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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//         Global Functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Configures the pin associated with the given LED number. If the LED does
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/// not exist on the board, the function does nothing.
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/// \param led  Number of the LED to configure.
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/// \return 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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/// Turns the given LED on if it exists; otherwise does nothing.
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/// \param led  Number of the LED to turn on.
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/// \return 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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/// Turns a LED off.
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/// \param led  Number of the LED to turn off.
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/// \param 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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/// Toggles the current state of a LED.
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/// \param led  Number of the LED to toggle.
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/// \return 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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