Diff: dn_endianness.c

Revision:

0:8ca1e814a851

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dn_endianness.c	Wed May 02 09:26:10 2018 +0000
@@ -0,0 +1,50 @@
+/*
+Copyright (c) 2016, Dust Networks. All rights reserved.
+
+Port of the endianness module to the NUCLEO-L053R8.
+
+\license See attached DN_LICENSE.txt.
+*/
+
+#include "dn_endianness.h"
+
+//=========================== variables =======================================
+
+//=========================== prototypes ======================================
+
+//=========================== public ==========================================
+
+void dn_write_uint16_t(uint8_t* ptr, uint16_t val){
+  // STM32L0 is a little-endian platform
+   ptr[0]     = (val>>8)  & 0xff;
+   ptr[1]     = (val>>0)  & 0xff;
+}
+
+void dn_write_uint32_t(uint8_t* ptr, uint32_t val){ 
+  // STM32L0 is a little-endian platform
+   ptr[0]     = (val>>24) & 0xff;
+   ptr[1]     = (val>>16) & 0xff;
+   ptr[2]     = (val>>8)  & 0xff;
+   ptr[3]     = (val>>0)  & 0xff;
+}
+
+void dn_read_uint16_t(uint16_t* to, uint8_t* from){
+   // STM32L0 is a little-endian platform
+   *to        = 0;
+   *to       |= (from[1]<<0);
+   *to       |= (from[0]<<8);
+}
+
+void dn_read_uint32_t(uint32_t* to, uint8_t* from){
+   // STM32L0 is a little-endian platform
+   *to        = 0;
+   *to       |= ( ((uint32_t)from[3])<<0 );
+   *to       |= ( ((uint32_t)from[2])<<8 );
+   *to       |= ( ((uint32_t)from[1])<<16);
+   *to       |= ( ((uint32_t)from[0])<<24);
+}
+
+//=========================== private =========================================
+
+//=========================== helpers =========================================
+