1 /* ----------------------------------------------------------------------------
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2 * ATMEL Microcontroller Software Support
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2008, Atmel Corporation
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6 * All rights reserved.
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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11 * - Redistributions of source code must retain the above copyright notice,
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12 * this list of conditions and the disclaimer below.
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14 * Atmel's name may not be used to endorse or promote products derived from
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15 * this software without specific prior written permission.
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17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 * ----------------------------------------------------------------------------
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34 Small set of functions for simple and portable LED usage.
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37 1 - Configure one or more LEDs using <LED_Configure> and
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39 2 - Set, clear and toggle LEDs using <LED_Set>, <LED_Clear> and
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41 3 - Get the current status of a LED using <LED_Get>.
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43 LEDs are numbered starting from 0; the number of LEDs depend on the
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44 board being used. All the functions defined here will compile properly
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45 regardless of whether the LED is defined or not; they will simply
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46 return 0 when a LED which does not exist is given as an argument.
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47 Also, these functions take into account how each LED is connected on to
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48 board; thus, <LED_Set> might change the level on the corresponding pin
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49 to 0 or 1, but it will always light the LED on; same thing for the other
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56 //------------------------------------------------------------------------------
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57 // Exported functions
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58 //------------------------------------------------------------------------------
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60 extern unsigned char LED_Configure(unsigned int led);
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61 extern unsigned char LED_Set(unsigned int led);
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62 extern unsigned char LED_Clear(unsigned int led);
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63 extern unsigned char LED_Toggle(unsigned int led);
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65 #endif //#ifndef LED_H
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