Index: Utilities.h
===================================================================
diff -u -r5846ff450c26de04b388c2636964a9116ccb6e9d -rdeccca7f64383d627e700a8bb929742eb33d947a
--- Utilities.h	(.../Utilities.h)	(revision 5846ff450c26de04b388c2636964a9116ccb6e9d)
+++ Utilities.h	(.../Utilities.h)	(revision deccca7f64383d627e700a8bb929742eb33d947a)
@@ -7,8 +7,8 @@
 *
 * @file    Utilities.h
 *
-* @author  (last)      Michael Garthwaite
-* @date    (last)      22-Feb-2022
+* @author  (last)      Dara Navaei
+* @date    (last)      09-Aug-2022
 *
 * @author  (original)  Sean
 * @date    (original)  17-Feb-2020
@@ -39,7 +39,8 @@
     TIME_WINDOWED_COUNT_CAN_OFF,                            ///< CAN off
     TIME_WINDOWED_COUNT_CAN_PARITY,                         ///< CAN parity error
     TIME_WINDOWED_COUNT_FPGA_UART_FRAME_ERROR,              ///< FPGA UART frame error
-    TIME_WINDOWED_COUNT_FPGA_UART_OVERRUN,                  ///< FPGA UART overrun error
+    TIME_WINDOWED_COUNT_FPGA_UART_OVERRUN,                  ///< FPGA UART overrun error
+    TIME_WINDOWED_COUNT_FPGA_CLOCK_SPEED_ERROR,             ///< FPGA clock speed error
 #ifdef _HD_
     TIME_WINDOWED_COUNT_BP_COMMUTATION_ERROR,               ///< Blood pump commutation error
     TIME_WINDOWED_COUNT_DIP_COMMUTATION_ERROR,              ///< Dialysate inlet pump commutation error
@@ -62,6 +63,13 @@
     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 +95,7 @@
 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 +107,12 @@
 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 );
+BOOL isSemaphoreReleased( SEMAPHORE_T s );
 
 /**@}*/