Josh Curry / Mbed 2 deprecated simple-demo-72

Simple LoRaWAN Demo (SX1272 Radio)

Dependencies:   mbed LoRaWAN-lib SX1272Lib

Fork of LoRaWAN-demo-72 by Semtech

system/utilities.cpp@8:421371b1777a, 2017-10-19 (annotated)

Committer:
joshcurry
Date:
Thu Oct 19 13:26:21 2017 +0000
Revision:
8:421371b1777a
Parent:
0:45496a70a8a5 
Working as of 19th october.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mluis 0:45496a70a8a5 1 /*
mluis 0:45496a70a8a5 2 / _____) _ | |
mluis 0:45496a70a8a5 3 ( (____ _____ ____ _| |_ _____ ____| |__
mluis 0:45496a70a8a5 4 \____ \| ___ | (_ _) ___ |/ ___) _ \
mluis 0:45496a70a8a5 5 _____) ) ____| | | || |_| ____( (___| | | |
mluis 0:45496a70a8a5 6 (______/|_____)_|_|_| \__)_____)\____)_| |_|
mluis 0:45496a70a8a5 7 (C)2013 Semtech
mluis 0:45496a70a8a5 8
mluis 0:45496a70a8a5 9 Description: Helper functions implementation
mluis 0:45496a70a8a5 10
mluis 0:45496a70a8a5 11 License: Revised BSD License, see LICENSE.TXT file include in the project
mluis 0:45496a70a8a5 12
mluis 0:45496a70a8a5 13 Maintainer: Miguel Luis and Gregory Cristian
mluis 0:45496a70a8a5 14 */
mluis 0:45496a70a8a5 15 #include <stdlib.h>
mluis 0:45496a70a8a5 16 #include <stdio.h>
mluis 0:45496a70a8a5 17 #include "board.h"
mluis 0:45496a70a8a5 18 #include "utilities.h"
mluis 0:45496a70a8a5 19
mluis 0:45496a70a8a5 20 /*!
mluis 0:45496a70a8a5 21 * Redefinition of rand() and srand() standard C functions.
mluis 0:45496a70a8a5 22 * These functions are redefined in order to get the same behavior across
mluis 0:45496a70a8a5 23 * different compiler toolchains implementations.
mluis 0:45496a70a8a5 24 */
mluis 0:45496a70a8a5 25 // Standard random functions redefinition start
mluis 0:45496a70a8a5 26 #define RAND_LOCAL_MAX 2147483647L
mluis 0:45496a70a8a5 27
mluis 0:45496a70a8a5 28 static uint32_t next = 1;
mluis 0:45496a70a8a5 29
mluis 0:45496a70a8a5 30 int32_t rand1( void )
mluis 0:45496a70a8a5 31 {
mluis 0:45496a70a8a5 32 return ( ( next = next * 1103515245L + 12345L ) % RAND_LOCAL_MAX );
mluis 0:45496a70a8a5 33 }
mluis 0:45496a70a8a5 34
mluis 0:45496a70a8a5 35 void srand1( uint32_t seed )
mluis 0:45496a70a8a5 36 {
mluis 0:45496a70a8a5 37 next = seed;
mluis 0:45496a70a8a5 38 }
mluis 0:45496a70a8a5 39 // Standard random functions redefinition end
mluis 0:45496a70a8a5 40
mluis 0:45496a70a8a5 41 int32_t randr( int32_t min, int32_t max )
mluis 0:45496a70a8a5 42 {
mluis 0:45496a70a8a5 43 return ( int32_t )rand1( ) % ( max - min + 1 ) + min;
mluis 0:45496a70a8a5 44 }
mluis 0:45496a70a8a5 45
mluis 0:45496a70a8a5 46 void memcpy1( uint8_t *dst, const uint8_t *src, uint16_t size )
mluis 0:45496a70a8a5 47 {
mluis 0:45496a70a8a5 48 while( size-- )
mluis 0:45496a70a8a5 49 {
mluis 0:45496a70a8a5 50 *dst++ = *src++;
mluis 0:45496a70a8a5 51 }
mluis 0:45496a70a8a5 52 }
mluis 0:45496a70a8a5 53
mluis 0:45496a70a8a5 54 void memcpyr( uint8_t *dst, const uint8_t *src, uint16_t size )
mluis 0:45496a70a8a5 55 {
mluis 0:45496a70a8a5 56 dst = dst + ( size - 1 );
mluis 0:45496a70a8a5 57 while( size-- )
mluis 0:45496a70a8a5 58 {
mluis 0:45496a70a8a5 59 *dst-- = *src++;
mluis 0:45496a70a8a5 60 }
mluis 0:45496a70a8a5 61 }
mluis 0:45496a70a8a5 62
mluis 0:45496a70a8a5 63 void memset1( uint8_t *dst, uint8_t value, uint16_t size )
mluis 0:45496a70a8a5 64 {
mluis 0:45496a70a8a5 65 while( size-- )
mluis 0:45496a70a8a5 66 {
mluis 0:45496a70a8a5 67 *dst++ = value;
mluis 0:45496a70a8a5 68 }
mluis 0:45496a70a8a5 69 }
mluis 0:45496a70a8a5 70
mluis 0:45496a70a8a5 71 int8_t Nibble2HexChar( uint8_t a )
mluis 0:45496a70a8a5 72 {
mluis 0:45496a70a8a5 73 if( a < 10 )
mluis 0:45496a70a8a5 74 {
mluis 0:45496a70a8a5 75 return '0' + a;
mluis 0:45496a70a8a5 76 }
mluis 0:45496a70a8a5 77 else if( a < 16 )
mluis 0:45496a70a8a5 78 {
mluis 0:45496a70a8a5 79 return 'A' + ( a - 10 );
mluis 0:45496a70a8a5 80 }
mluis 0:45496a70a8a5 81 else
mluis 0:45496a70a8a5 82 {
mluis 0:45496a70a8a5 83 return '?';
mluis 0:45496a70a8a5 84 }
mluis 0:45496a70a8a5 85 }