Zheng Ping / LoRaMacLib

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system/utilities.cpp@0:9be122c18509, 2015-08-12 (annotated)

Committer:
GregCr
Date:
Wed Aug 12 14:08:29 2015 +0000
Revision:
0:9be122c18509
First Implementation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GregCr 0:9be122c18509 1 /*
GregCr 0:9be122c18509 2 / _____) _ | |
GregCr 0:9be122c18509 3 ( (____ _____ ____ _| |_ _____ ____| |__
GregCr 0:9be122c18509 4 \____ \| ___ | (_ _) ___ |/ ___) _ \
GregCr 0:9be122c18509 5 _____) ) ____| | | || |_| ____( (___| | | |
GregCr 0:9be122c18509 6 (______/|_____)_|_|_| \__)_____)\____)_| |_|
GregCr 0:9be122c18509 7 (C)2013 Semtech
GregCr 0:9be122c18509 8
GregCr 0:9be122c18509 9 Description: Helper functions implementation
GregCr 0:9be122c18509 10
GregCr 0:9be122c18509 11 License: Revised BSD License, see LICENSE.TXT file include in the project
GregCr 0:9be122c18509 12
GregCr 0:9be122c18509 13 Maintainer: Miguel Luis and Gregory Cristian
GregCr 0:9be122c18509 14 */
GregCr 0:9be122c18509 15 #include <stdlib.h>
GregCr 0:9be122c18509 16 #include <stdio.h>
GregCr 0:9be122c18509 17 #include "board.h"
GregCr 0:9be122c18509 18 #include "utilities.h"
GregCr 0:9be122c18509 19
GregCr 0:9be122c18509 20 /*!
GregCr 0:9be122c18509 21 * Redefinition of rand() and srand() standard C functions.
GregCr 0:9be122c18509 22 * These functions are redefined in order to get the same behavior across
GregCr 0:9be122c18509 23 * different compiler toolchains implementations.
GregCr 0:9be122c18509 24 */
GregCr 0:9be122c18509 25 // Standard random functions redefinition start
GregCr 0:9be122c18509 26 #define RAND_LOCAL_MAX 2147483647
GregCr 0:9be122c18509 27
GregCr 0:9be122c18509 28 static unsigned long next = 1;
GregCr 0:9be122c18509 29
GregCr 0:9be122c18509 30 int rand1( void )
GregCr 0:9be122c18509 31 {
GregCr 0:9be122c18509 32 return ( ( next = next * 1103515245 + 12345 ) % RAND_LOCAL_MAX );
GregCr 0:9be122c18509 33 }
GregCr 0:9be122c18509 34
GregCr 0:9be122c18509 35 void srand1( unsigned int seed )
GregCr 0:9be122c18509 36 {
GregCr 0:9be122c18509 37 next = seed;
GregCr 0:9be122c18509 38 }
GregCr 0:9be122c18509 39 // Standard random functions redefinition end
GregCr 0:9be122c18509 40
GregCr 0:9be122c18509 41 int32_t randr( int32_t min, int32_t max )
GregCr 0:9be122c18509 42 {
GregCr 0:9be122c18509 43 return ( int32_t )rand1( ) % ( max - min + 1 ) + min;
GregCr 0:9be122c18509 44 }
GregCr 0:9be122c18509 45
GregCr 0:9be122c18509 46 void memcpy1( uint8_t *dst, uint8_t *src, uint16_t size )
GregCr 0:9be122c18509 47 {
GregCr 0:9be122c18509 48 while( size-- )
GregCr 0:9be122c18509 49 {
GregCr 0:9be122c18509 50 *dst++ = *src++;
GregCr 0:9be122c18509 51 }
GregCr 0:9be122c18509 52 }
GregCr 0:9be122c18509 53
GregCr 0:9be122c18509 54 void memset1( uint8_t *dst, uint8_t value, uint16_t size )
GregCr 0:9be122c18509 55 {
GregCr 0:9be122c18509 56 while( size-- )
GregCr 0:9be122c18509 57 {
GregCr 0:9be122c18509 58 *dst++ = value;
GregCr 0:9be122c18509 59 }
GregCr 0:9be122c18509 60 }
GregCr 0:9be122c18509 61
GregCr 0:9be122c18509 62 int8_t Nibble2HexChar( uint8_t a )
GregCr 0:9be122c18509 63 {
GregCr 0:9be122c18509 64 if( a < 10 )
GregCr 0:9be122c18509 65 {
GregCr 0:9be122c18509 66 return '0' + a;
GregCr 0:9be122c18509 67 }
GregCr 0:9be122c18509 68 else if( a < 16 )
GregCr 0:9be122c18509 69 {
GregCr 0:9be122c18509 70 return 'A' + ( a - 10 );
GregCr 0:9be122c18509 71 }
GregCr 0:9be122c18509 72 else
GregCr 0:9be122c18509 73 {
GregCr 0:9be122c18509 74 return '?';
GregCr 0:9be122c18509 75 }
GregCr 0:9be122c18509 76 }
GregCr 0:9be122c18509 77
GregCr 0:9be122c18509 78 #ifdef __GNUC__
GregCr 0:9be122c18509 79 /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
GregCr 0:9be122c18509 80 set to 'Yes') calls __io_putchar() */
GregCr 0:9be122c18509 81 int __io_putchar( int c )
GregCr 0:9be122c18509 82 #else /* __GNUC__ */
GregCr 0:9be122c18509 83 int fputc( int c, FILE *stream )
GregCr 0:9be122c18509 84 #endif
GregCr 0:9be122c18509 85 {
GregCr 0:9be122c18509 86 return( ITM_SendChar( c ) );
GregCr 0:9be122c18509 87 }