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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_AT91SAM3U256_IAR/] [system/] [led.c] - Rev 621
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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. * ---------------------------------------------------------------------------- */ //------------------------------------------------------------------------------ // Headers //------------------------------------------------------------------------------ #include "led.h" #include <board.h> #include <pio/pio.h> //------------------------------------------------------------------------------ // Local Variables //------------------------------------------------------------------------------ #ifdef PINS_LEDS static const Pin pinsLeds[] = {PINS_LEDS}; static const unsigned int numLeds = PIO_LISTSIZE(pinsLeds); #endif //------------------------------------------------------------------------------ // Global Functions //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ /// Configures the pin associated with the given LED number. If the LED does /// not exist on the board, the function does nothing. /// \param led Number of the LED to configure. /// \return 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 } //------------------------------------------------------------------------------ /// Turns the given LED on if it exists; otherwise does nothing. /// \param led Number of the LED to turn on. /// \return 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 } //------------------------------------------------------------------------------ /// Turns a LED off. /// \param led Number of the LED to turn off. /// \param 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 } //------------------------------------------------------------------------------ /// Toggles the current state of a LED. /// \param led Number of the LED to toggle. /// \return 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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