this is avaiable project

Dependents:   LoRaWAN_MBED

Fork of LoRaMacLib by LoRa All

system/utilities.cpp

Committer:
GregCr
Date:
2015-08-12
Revision:
0:9be122c18509

File content as of revision 0:9be122c18509:

/*
 / _____)             _              | |
( (____  _____ ____ _| |_ _____  ____| |__
 \____ \| ___ |    (_   _) ___ |/ ___)  _ \
 _____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
    (C)2013 Semtech

Description: Helper functions implementation

License: Revised BSD License, see LICENSE.TXT file include in the project

Maintainer: Miguel Luis and Gregory Cristian
*/
#include <stdlib.h>
#include <stdio.h>
#include "board.h"
#include "utilities.h"

/*!
 * Redefinition of rand() and srand() standard C functions.
 * These functions are redefined in order to get the same behavior across
 * different compiler toolchains implementations.
 */
// Standard random functions redefinition start
#define RAND_LOCAL_MAX 2147483647

static unsigned long next = 1;

int rand1( void )
{
    return ( ( next = next * 1103515245 + 12345 ) % RAND_LOCAL_MAX );
}

void srand1( unsigned int seed )
{
    next = seed;
}
// Standard random functions redefinition end

int32_t randr( int32_t min, int32_t max )
{
    return ( int32_t )rand1( ) % ( max - min + 1 ) + min;
}

void memcpy1( uint8_t *dst, uint8_t *src, uint16_t size )
{
    while( size-- )
    {
        *dst++ = *src++;
    }
}

void memset1( uint8_t *dst, uint8_t value, uint16_t size )
{
    while( size-- )
    {
        *dst++ = value;
    }
}

int8_t Nibble2HexChar( uint8_t a )
{
    if( a < 10 )
    {
        return '0' + a;
    }
    else if( a < 16 )
    {
        return 'A' + ( a - 10 );
    }
    else
    {
        return '?';
    }
}

#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
   set to 'Yes') calls __io_putchar() */
int __io_putchar( int c )
#else /* __GNUC__ */
int fputc( int c, FILE *stream )
#endif
{
   return( ITM_SendChar( c ) );
}