Akshay Mishra / LoRaWAN-lib

to be used with the DSPLoRa module (minor changes wrt transmit power)

Dependents:   DSP_LoRaWAN

Fork of LoRaWAN-lib by S P

system/utilities.cpp@0:91d1a7783bb9, 2015-10-20 (annotated)

Committer:
mluis
Date:
Tue Oct 20 13:21:26 2015 +0000
Revision:
0:91d1a7783bb9
Library creation synchronized with GitHub LoRaMac-node v3.4 (https://github.com/Lora-net/LoRaMac-node)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mluis 0:91d1a7783bb9 1 /*
mluis 0:91d1a7783bb9 2 / _____) _ | |
mluis 0:91d1a7783bb9 3 ( (____ _____ ____ _| |_ _____ ____| |__
mluis 0:91d1a7783bb9 4 \____ \| ___ | (_ _) ___ |/ ___) _ \
mluis 0:91d1a7783bb9 5 _____) ) ____| | | || |_| ____( (___| | | |
mluis 0:91d1a7783bb9 6 (______/|_____)_|_|_| \__)_____)\____)_| |_|
mluis 0:91d1a7783bb9 7 (C)2013 Semtech
mluis 0:91d1a7783bb9 8
mluis 0:91d1a7783bb9 9 Description: Helper functions implementation
mluis 0:91d1a7783bb9 10
mluis 0:91d1a7783bb9 11 License: Revised BSD License, see LICENSE.TXT file include in the project
mluis 0:91d1a7783bb9 12
mluis 0:91d1a7783bb9 13 Maintainer: Miguel Luis and Gregory Cristian
mluis 0:91d1a7783bb9 14 */
mluis 0:91d1a7783bb9 15 #include <stdlib.h>
mluis 0:91d1a7783bb9 16 #include <stdio.h>
mluis 0:91d1a7783bb9 17 #include "board.h"
mluis 0:91d1a7783bb9 18 #include "utilities.h"
mluis 0:91d1a7783bb9 19
mluis 0:91d1a7783bb9 20 /*!
mluis 0:91d1a7783bb9 21 * Redefinition of rand() and srand() standard C functions.
mluis 0:91d1a7783bb9 22 * These functions are redefined in order to get the same behavior across
mluis 0:91d1a7783bb9 23 * different compiler toolchains implementations.
mluis 0:91d1a7783bb9 24 */
mluis 0:91d1a7783bb9 25 // Standard random functions redefinition start
mluis 0:91d1a7783bb9 26 #define RAND_LOCAL_MAX 2147483647
mluis 0:91d1a7783bb9 27
mluis 0:91d1a7783bb9 28 static unsigned long next = 1;
mluis 0:91d1a7783bb9 29
mluis 0:91d1a7783bb9 30 int rand1( void )
mluis 0:91d1a7783bb9 31 {
mluis 0:91d1a7783bb9 32 return ( ( next = next * 1103515245 + 12345 ) % RAND_LOCAL_MAX );
mluis 0:91d1a7783bb9 33 }
mluis 0:91d1a7783bb9 34
mluis 0:91d1a7783bb9 35 void srand1( unsigned int seed )
mluis 0:91d1a7783bb9 36 {
mluis 0:91d1a7783bb9 37 next = seed;
mluis 0:91d1a7783bb9 38 }
mluis 0:91d1a7783bb9 39 // Standard random functions redefinition end
mluis 0:91d1a7783bb9 40
mluis 0:91d1a7783bb9 41 int32_t randr( int32_t min, int32_t max )
mluis 0:91d1a7783bb9 42 {
mluis 0:91d1a7783bb9 43 return ( int32_t )rand1( ) % ( max - min + 1 ) + min;
mluis 0:91d1a7783bb9 44 }
mluis 0:91d1a7783bb9 45
mluis 0:91d1a7783bb9 46 void memcpy1( uint8_t *dst, const uint8_t *src, uint16_t size )
mluis 0:91d1a7783bb9 47 {
mluis 0:91d1a7783bb9 48 while( size-- )
mluis 0:91d1a7783bb9 49 {
mluis 0:91d1a7783bb9 50 *dst++ = *src++;
mluis 0:91d1a7783bb9 51 }
mluis 0:91d1a7783bb9 52 }
mluis 0:91d1a7783bb9 53
mluis 0:91d1a7783bb9 54 void memset1( uint8_t *dst, uint8_t value, uint16_t size )
mluis 0:91d1a7783bb9 55 {
mluis 0:91d1a7783bb9 56 while( size-- )
mluis 0:91d1a7783bb9 57 {
mluis 0:91d1a7783bb9 58 *dst++ = value;
mluis 0:91d1a7783bb9 59 }
mluis 0:91d1a7783bb9 60 }
mluis 0:91d1a7783bb9 61
mluis 0:91d1a7783bb9 62 int8_t Nibble2HexChar( uint8_t a )
mluis 0:91d1a7783bb9 63 {
mluis 0:91d1a7783bb9 64 if( a < 10 )
mluis 0:91d1a7783bb9 65 {
mluis 0:91d1a7783bb9 66 return '0' + a;
mluis 0:91d1a7783bb9 67 }
mluis 0:91d1a7783bb9 68 else if( a < 16 )
mluis 0:91d1a7783bb9 69 {
mluis 0:91d1a7783bb9 70 return 'A' + ( a - 10 );
mluis 0:91d1a7783bb9 71 }
mluis 0:91d1a7783bb9 72 else
mluis 0:91d1a7783bb9 73 {
mluis 0:91d1a7783bb9 74 return '?';
mluis 0:91d1a7783bb9 75 }
mluis 0:91d1a7783bb9 76 }