SAMV71 Xplained Ultra Software Package 1.5

math.c

00001 /* ---------------------------------------------------------------------------- */
00002 /*                  Atmel Microcontroller Software Support                      */
00003 /*                       SAM Software Package License                           */
00004 /* ---------------------------------------------------------------------------- */
00005 /* Copyright (c) 2015, Atmel Corporation                                        */
00006 /*                                                                              */
00007 /* All rights reserved.                                                         */
00008 /*                                                                              */
00009 /* Redistribution and use in source and binary forms, with or without           */
00010 /* modification, are permitted provided that the following condition is met:    */
00011 /*                                                                              */
00012 /* - Redistributions of source code must retain the above copyright notice,     */
00013 /* this list of conditions and the disclaimer below.                            */
00014 /*                                                                              */
00015 /* Atmel's name may not be used to endorse or promote products derived from     */
00016 /* this software without specific prior written permission.                     */
00017 /*                                                                              */
00018 /* DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR   */
00019 /* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
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00027 /* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           */
00028 /* ---------------------------------------------------------------------------- */
00029 
00030 /*------------------------------------------------------------------------------
00031  *         Headers
00032  *----------------------------------------------------------------------------*/
00033 
00034 #include "board.h"
00035 
00036 /*------------------------------------------------------------------------------
00037  *         Exported functions
00038  *----------------------------------------------------------------------------*/
00039 
00040 /**
00041  *  Returns the minimum value between two integers.
00042  *
00043  *  \param a  First integer to compare.
00044  *  \param b  Second integer to compare.
00045  */
00046 extern uint32_t min(uint32_t dwA, uint32_t dwB)
00047 {
00048     if (dwA < dwB)
00049         return dwA;
00050     else
00051         return dwB;
00052 }
00053 
00054 /*------------------------------------------------------------------------------
00055  *  Returns the absolute value of an integer.
00056  *
00057  *  \param value  Integer value.
00058  *
00059  *  \note Do not call this function "abs", problem with gcc !
00060  */
00061 extern uint32_t absv(int32_t lValue)
00062 {
00063     if (lValue < 0)
00064         return -lValue;
00065     else
00066         return lValue;
00067 }
00068 
00069 /*------------------------------------------------------------------------------
00070  *  Computes and returns x power of y.
00071  *
00072  *  \param x  Value.
00073  *  \param y  Power.
00074  */
00075 extern uint32_t power(uint32_t dwX, uint32_t dwY)
00076 {
00077     uint32_t dwResult = 1;
00078 
00079     while (dwY > 0) {
00080         dwResult *= dwX;
00081         dwY--;
00082     }
00083 
00084     return dwResult;
00085 }
00086 
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