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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [drivers/] [Atmel/] [at91lib/] [utility/] [led.h] - Rev 608
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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 About: Purpose Small set of functions for simple and portable LED usage. About: Usage 1 - Configure one or more LEDs using <LED_Configure> and <LED_ConfigureAll>. 2 - Set, clear and toggle LEDs using <LED_Set>, <LED_Clear> and <LED_Toggle>. 3 - Get the current status of a LED using <LED_Get>. LEDs are numbered starting from 0; the number of LEDs depend on the board being used. All the functions defined here will compile properly regardless of whether the LED is defined or not; they will simply return 0 when a LED which does not exist is given as an argument. Also, these functions take into account how each LED is connected on to board; thus, <LED_Set> might change the level on the corresponding pin to 0 or 1, but it will always light the LED on; same thing for the other methods. */ #ifndef LED_H #define LED_H //------------------------------------------------------------------------------ // Exported functions //------------------------------------------------------------------------------ extern unsigned char LED_Configure(unsigned int led); extern unsigned char LED_Set(unsigned int led); extern unsigned char LED_Clear(unsigned int led); extern unsigned char LED_Toggle(unsigned int led); #endif //#ifndef LED_H