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