utilities.cpp

00001 /*
00002  / _____)             _              | |
00003 ( (____  _____ ____ _| |_ _____  ____| |__
00004  \____ \| ___ |    (_   _) ___ |/ ___)  _ \
00005  _____) ) ____| | | || |_| ____( (___| | | |
00006 (______/|_____)_|_|_| \__)_____)\____)_| |_|
00007     (C)2013 Semtech
00008 
00009 Description: Helper functions implementation
00010 
00011 License: Revised BSD License, see LICENSE.TXT file include in the project
00012 
00013 Maintainer: Miguel Luis and Gregory Cristian
00014 */
00015 #include <stdlib.h>
00016 #include <stdio.h>
00017 #include "board.h"
00018 #include "utilities.h"
00019 
00020 /*!
00021  * Redefinition of rand() and srand() standard C functions.
00022  * These functions are redefined in order to get the same behavior across
00023  * different compiler toolchains implementations.
00024  */
00025 // Standard random functions redefinition start
00026 #define RAND_LOCAL_MAX 2147483647L
00027 
00028 static uint32_t next = 1;
00029 
00030 int32_t rand1( void )
00031 {
00032     return ( ( next = next * 1103515245L + 12345L ) % RAND_LOCAL_MAX );
00033 }
00034 
00035 void srand1( uint32_t seed )
00036 {
00037     next = seed;
00038 }
00039 // Standard random functions redefinition end
00040 
00041 int32_t randr( int32_t min, int32_t max )
00042 {
00043     return ( int32_t )rand1( ) % ( max - min + 1 ) + min;
00044 }
00045 
00046 void memcpy1( uint8_t *dst, const uint8_t *src, uint16_t size )
00047 {
00048     while( size-- )
00049     {
00050         *dst++ = *src++;
00051     }
00052 }
00053 
00054 void memcpyr( uint8_t *dst, const uint8_t *src, uint16_t size )
00055 {
00056     dst = dst + ( size - 1 );
00057     while( size-- )
00058     {
00059         *dst-- = *src++;
00060     }
00061 }
00062 
00063 void memset1( uint8_t *dst, uint8_t value, uint16_t size )
00064 {
00065     while( size-- )
00066     {
00067         *dst++ = value;
00068     }
00069 }
00070 
00071 int8_t Nibble2HexChar( uint8_t a )
00072 {
00073     if( a < 10 )
00074     {
00075         return '0' + a;
00076     }
00077     else if( a < 16 )
00078     {
00079         return 'A' + ( a - 10 );
00080     }
00081     else
00082     {
00083         return '?';
00084     }
00085 }