Index: PersistentAlarm.c
===================================================================
diff -u -r7f049fb55e8f7fd41cf2dbd19a0e43d4e684af78 -r7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea
--- PersistentAlarm.c	(.../PersistentAlarm.c)	(revision 7f049fb55e8f7fd41cf2dbd19a0e43d4e684af78)
+++ PersistentAlarm.c	(.../PersistentAlarm.c)	(revision 7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea)
@@ -59,7 +59,7 @@
  * @return none
  *************************************************************************/
 void initPersistentAlarm( PERSISTENT_ALARM_T alarmIndex, ALARM_ID_T alarm, BOOL isClearable,
-                          F32 persistentClearPeriod, F32 persistentTriggerPeriod )
+                          U32 persistentClearPeriod, U32 persistentTriggerPeriod )
 {
     if ( alarmIndex < NUM_OF_PERSISTENT_ALARM )
     {
Index: PersistentAlarm.h
===================================================================
diff -u -r9af7bb552347c6dd5a328e465214c11cffd746d2 -r7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea
--- PersistentAlarm.h	(.../PersistentAlarm.h)	(revision 9af7bb552347c6dd5a328e465214c11cffd746d2)
+++ PersistentAlarm.h	(.../PersistentAlarm.h)	(revision 7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea)
@@ -34,6 +34,8 @@
 typedef enum PersistentAlarm
 {
 #ifdef _HD_
+    PERSISTENT_ALARM_BLOOD_FLOW_SIGNAL_STRENGTH,                    ///< Blood flow signal strength too low
+    PERSISTENT_ALARM_DIALYSATE_FLOW_SIGNAL_STRENGTH,                ///< Dialysate flow signal strength too low
 #endif
 #ifdef _DG_
     PERSISTENT_ALARM_INLET_WATER_HIGH_TEMPERATURE,                  ///< Inlet water high temperature persistent alarm
@@ -56,7 +58,7 @@
 
 // Persistent period resolution is in ms
 void initPersistentAlarm( PERSISTENT_ALARM_T alarmIndex, ALARM_ID_T alarm, BOOL isClearable,
-                          F32 persistentClearPeriod, F32 persistentTriggerPeriod );
+                          U32 persistentClearPeriod, U32 persistentTriggerPeriod );
 void checkPersistentAlarm( PERSISTENT_ALARM_T const alarmIndex, BOOL const isOutOfRange, F32 const data );
 
 /**@}*/
Index: Utilities.c
===================================================================
diff -u -r4b3e011f99900660c9c9f23d3ea50a07cb61e64b -r7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea
--- Utilities.c	(.../Utilities.c)	(revision 4b3e011f99900660c9c9f23d3ea50a07cb61e64b)
+++ Utilities.c	(.../Utilities.c)	(revision 7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea)
@@ -104,7 +104,7 @@
  * @brief
  * The crc16 function calculates a 16-bit CRC for a given range of bytes
  * in memory. Poly = 0x1021. Not reflected. Initial value = 0xFFFF.
- * @details Inputs: none
+ * @details Inputs: crc16_table[]
  * @details Outputs: none
  * @param address pointer to start address of memory range to calculate CRC for
  * @param len number of bytes in the memory range to calculate CRC for
@@ -127,7 +127,7 @@
  * @brief
  * The crc8 function calculates a 8-bit CRC for a given range of bytes
  * in memory.
- * @details Inputs: none
+ * @details Inputs: crc8_table[]
  * @details Outputs: none
  * @param address pointer to start address of memory range to calculate CRC for
  * @param len number of bytes in the memory range to calculate CRC for
@@ -144,6 +144,36 @@
     }
 
     return crc;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The u32DiffWithWrap function calculates the difference between two given
+ * unsigned 32-bit numbers.  If the second (ending) number is less than the
+ * first (starting) number, then the difference is calculated with a wrap past
+ * 32-bit full scale to zero.
+ * @details Inputs: none
+ * @details Outputs: none
+ * @param start first number to compute difference for
+ * @param end second number to compute difference for
+ * @return the difference between the two given numbers
+ *************************************************************************/
+U32 u32DiffWithWrap( U32 start, U32 end )
+{
+    U32 result;
+
+    // no wrap
+    if ( end >= start )
+    {
+        result = end - start;
+    }
+    // wrapped
+    else
+    {
+        result = ( 0xFFFFFFFF - start ) + end + 1;
+    }
+
+    return result;
 }
 
 /*********************************************************************//**
Index: Utilities.h
===================================================================
diff -u -r7971a36491e30a84139068d7e00b416cf1ea3ee1 -r7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea
--- Utilities.h	(.../Utilities.h)	(revision 7971a36491e30a84139068d7e00b416cf1ea3ee1)
+++ Utilities.h	(.../Utilities.h)	(revision 7c49409b1bfeee8fd788fe1cd2a6dbf2abda7fea)
@@ -90,7 +90,8 @@
 CRITICAL_DATAS_T getCriticalData( CRITICAL_DATA_T *data );
 BOOL setCriticalData( CRITICAL_DATA_T *data, CRITICAL_DATAS_T value );
 BOOL isCriticalDataInRange( CRITICAL_DATA_T *data );
-void resetCriticalData( CRITICAL_DATA_T *data );
+void resetCriticalData( CRITICAL_DATA_T *data );
+U32 hexStrToDec( U08 const * const valuePtr, U08 size );
 
 /**@}*/