Index: Utilities.c
===================================================================
diff -u -rd772cd89f7bf0aab12f68ada0f8d557ddf6f4ddd -r527e5b84c94f89391b3c9023066f5a1bda270afc
--- Utilities.c	(.../Utilities.c)	(revision d772cd89f7bf0aab12f68ada0f8d557ddf6f4ddd)
+++ Utilities.c	(.../Utilities.c)	(revision 527e5b84c94f89391b3c9023066f5a1bda270afc)
@@ -222,6 +222,84 @@
     }
 
     return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The getCriticalData function gets the value for a given critical data \n
+ * record.  The integrity of the critical data is checked first.  If the \n
+ * critical data record fails the integrity check, a fault is triggered.
+ * @details
+ * Inputs : none
+ * Outputs : given critical data record's value is retrieved.
+ * @param data : Ptr to a critical data record
+ * @return The data from a critical data record
+ *************************************************************************/
+CRITICAL_DATAS_T getCriticalData( CRITICAL_DATA_T *data )
+{
+    CRITICAL_DATAS_T result;
+    CRITICAL_DATA_T  d;
+
+    _disable_IRQ();
+    d = *data;
+    _enable_IRQ();
+
+    result = d.data;
+    // verify data integrity
+    if ( ( ~d.data.uInt != d.comp ) &&
+         ( TRUE == d.set ) &&
+         ( data->typ < NUM_OF_CRITICAL_DATA_TYPES ) )
+    {
+        result.uInt = 0;
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_CRITICAL_DATA_ERROR, (U32)&data[0], 0 )
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The setCriticalData function sets the value for a given critical data \n
+ * record.
+ * @details
+ * Inputs : none
+ * Outputs : given critical data record's value is set to given value
+ * @param data : Ptr to a critical data record
+ * @param value : a value to set
+ * @return none
+ *************************************************************************/
+void setCriticalData( CRITICAL_DATA_T *data, CRITICAL_DATAS_T value )
+{
+    if ( data->typ < NUM_OF_CRITICAL_DATA_TYPES )
+    {
+        _disable_IRQ();
+        data->data = value;
+        data->comp = ~data->data.uInt;
+        data->set = TRUE;
+        _enable_IRQ();
+    }
+    else
+    {
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_CRITICAL_DATA_ERROR, (U32)&data[0], 1 )
+    }
+}
+
+/*********************************************************************//**
+ * @brief
+ * The resetCriticalData function resets a critical data record.
+ * @details
+ * Inputs : none
+ * Outputs : Given critical data record is reset
+ * @param data : Ptr to a critical data record
+ * @return none
+ *************************************************************************/
+void resetCriticalData( CRITICAL_DATA_T *data )
+{
+    _disable_IRQ();
+    data->set = FALSE;
+    data->data.uInt = 0;
+    data->comp = ~data->data.uInt;
+    _enable_IRQ();
 }
 
 /**@}*/
Index: Utilities.h
===================================================================
diff -u -rba25a0ba6b7f7cf1abe752543746c05a16740964 -r527e5b84c94f89391b3c9023066f5a1bda270afc
--- Utilities.h	(.../Utilities.h)	(revision ba25a0ba6b7f7cf1abe752543746c05a16740964)
+++ Utilities.h	(.../Utilities.h)	(revision 527e5b84c94f89391b3c9023066f5a1bda270afc)
@@ -28,6 +28,7 @@
 
 // ********** public definitions **********
 
+//                  ******* Time Windowed Count Definitions *********
 #define MAX_TIME_WINDOWED_COUNT         5           ///< Maximum # of counts that a time windowed count can count to.
 
 /// Enumeration of time-windowed counts.
@@ -48,13 +49,41 @@
 #endif
     NUM_OF_TIME_WINDOWED_COUNTS                             ///< Number of pressure sensors.
 } TIME_WINDOWED_COUNT_T;
-
+
+//                  ******* Critical Data Definitions *********
+/// Critical data types list.
+typedef enum Critical_Data_Types
+{
+    CRITICAL_DATA_TYPE_U32 = 0,                                     ///< Critical data is unsigned 32-bit integer type
+    CRITICAL_DATA_TYPE_F32,                                         ///< Critical data is 32-bit floating point type
+    NUM_OF_CRITICAL_DATA_TYPES                                      ///< Total number of critical data types.
+} CRITICAL_DATA_TYPES_T;
+
+/// Record structure for alarm data of any supported type.
+typedef union
+{
+    U32    uInt;       ///< critical data of unsigned integer type.
+    F32    flt;        ///< critical data of floating point type.
+} CRITICAL_DATAS_T;
+
+/// critical integer data structure.
+typedef struct
+{
+    CRITICAL_DATA_TYPES_T typ;  ///< Type of data
+    CRITICAL_DATAS_T data;      ///< Data value
+    U32 comp;                   ///< One's compliment of value
+    BOOL set;                   ///< Flag indicates data has been set
+} CRITICAL_DATA_T;
+
 // ********** public function prototypes **********
 
 U16 crc16( const U08 *address, U32 len );
 U08 crc8( const U08 *address, U32 len );
 void initTimeWindowedCount( TIME_WINDOWED_COUNT_T cnt, U32 maxCnt, U32 winMs );
-BOOL incTimeWindowedCount( TIME_WINDOWED_COUNT_T cnt );
+BOOL incTimeWindowedCount( TIME_WINDOWED_COUNT_T cnt );
+CRITICAL_DATAS_T getCriticalData( CRITICAL_DATA_T *data );
+void setCriticalData( CRITICAL_DATA_T *data, CRITICAL_DATAS_T value );
+void resetCriticalData( CRITICAL_DATA_T *data );
 
 /**@}*/