dn_endianness.c

00001 /*
00002 Copyright (c) 2016, Dust Networks. All rights reserved.
00003 
00004 Port of the endianness module to the NUCLEO-L053R8.
00005 
00006 \license See attached DN_LICENSE.txt.
00007 */
00008 
00009 #include "dn_endianness.h"
00010 
00011 //=========================== variables =======================================
00012 
00013 //=========================== prototypes ======================================
00014 
00015 //=========================== public ==========================================
00016 
00017 void dn_write_uint16_t(uint8_t* ptr, uint16_t val){
00018   // STM32L0 is a little-endian platform
00019    ptr[0]     = (val>>8)  & 0xff;
00020    ptr[1]     = (val>>0)  & 0xff;
00021 }
00022 
00023 void dn_write_uint32_t(uint8_t* ptr, uint32_t val){ 
00024   // STM32L0 is a little-endian platform
00025    ptr[0]     = (val>>24) & 0xff;
00026    ptr[1]     = (val>>16) & 0xff;
00027    ptr[2]     = (val>>8)  & 0xff;
00028    ptr[3]     = (val>>0)  & 0xff;
00029 }
00030 
00031 void dn_read_uint16_t(uint16_t* to, uint8_t* from){
00032    // STM32L0 is a little-endian platform
00033    *to        = 0;
00034    *to       |= (from[1]<<0);
00035    *to       |= (from[0]<<8);
00036 }
00037 
00038 void dn_read_uint32_t(uint32_t* to, uint8_t* from){
00039    // STM32L0 is a little-endian platform
00040    *to        = 0;
00041    *to       |= ( ((uint32_t)from[3])<<0 );
00042    *to       |= ( ((uint32_t)from[2])<<8 );
00043    *to       |= ( ((uint32_t)from[1])<<16);
00044    *to       |= ( ((uint32_t)from[0])<<24);
00045 }
00046 
00047 //=========================== private =========================================
00048 
00049 //=========================== helpers =========================================
00050