Index: Utilities.h
===================================================================
diff -u -r5846ff450c26de04b388c2636964a9116ccb6e9d -r7e186bb97310fb59f525e5399ec7a74711bea571
--- Utilities.h	(.../Utilities.h)	(revision 5846ff450c26de04b388c2636964a9116ccb6e9d)
+++ Utilities.h	(.../Utilities.h)	(revision 7e186bb97310fb59f525e5399ec7a74711bea571)
@@ -62,6 +62,13 @@
     NUM_OF_CRITICAL_DATA_TYPES                              ///< Total number of critical data types
 } CRITICAL_DATA_TYPES_T;
 
+/// Semaphore items
+typedef enum Semaphores
+{
+    SEMAPHORE_RTC = 0,                                      ///< Semaphore RTC
+    NUM_OF_SEMAPHORES,                                      ///< Number of semaphores
+} SEMAPHORE_T;
+
 /// Record structure for alarm data of any supported type.
 typedef union
 {
@@ -87,7 +94,7 @@
 U32 crc32( U32 const initialValue, const U08 *address, U32 len );
 U16 crc16( const U08 *address, U32 len );
 U08 crc8( const U08 *address, U32 len );
-U08 crc4( U08* buffer );
+U08 crc4( U16* buffer, U32 byteCount );
 U32 u32DiffWithWrap( U32 start, U32 end );
 S32 u32BiDiffWithWrap( U32 start, U32 end );
 U16 u16DiffWithWrap( U16 start, U16 end );
@@ -99,7 +106,11 @@
 BOOL isCriticalDataInRange( CRITICAL_DATA_T *data );
 void resetCriticalData( CRITICAL_DATA_T *data );
 U32 hexStrToDec( U08 const * const valuePtr, U08 size );
-BOOL isCriticalDataSet( CRITICAL_DATA_T *data );                                    ///< Determines if critcal data has been set.
+BOOL isCriticalDataSet( CRITICAL_DATA_T *data );                                    ///< Determines if critical data has been set.
+
+void initSemaphores( void );
+BOOL getSemaphore( SEMAPHORE_T s );
+void releaseSemaphore( SEMAPHORE_T s );
 
 /**@}*/