Index: Utilities.c
===================================================================
diff -u -r7ff7e715f7a15da5f4055b33e186d58cf96fe909 -r85db35aef9a57d1efc02bb3b42fc802b65aa3646
--- Utilities.c	(.../Utilities.c)	(revision 7ff7e715f7a15da5f4055b33e186d58cf96fe909)
+++ Utilities.c	(.../Utilities.c)	(revision 85db35aef9a57d1efc02bb3b42fc802b65aa3646)
@@ -8,7 +8,7 @@
 * @file Utilities.c
 *
 * @author (last) Sean Nash
-* @date (last) 04-Sep-2020
+* @date (last) 24-Sep-2020
 *
 * @author (original) Sean
 * @date (original) 17-Feb-2020
@@ -100,9 +100,8 @@
  * @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
- * Outputs: 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
  * @return CRC as a U16
@@ -124,9 +123,8 @@
  * @brief
  * The crc8 function calculates a 8-bit CRC for a given range of bytes
  * in memory.
- * @details
- * Inputs: none
- * Outputs: 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
  * @return CRC as a U08
@@ -142,14 +140,43 @@
     }
 
     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;
 }
 
 /*********************************************************************//**
  * @brief
  * The initTimeWindowedCount function initializes a given time windowed count.
- * @details
- * Inputs: timeWindowedCountsMaxCount, timeWindowedCountsInitialized
- * Outputs: timeWindowedCountsMaxCount, timeWindowedCountsInitialized, alarm if
+ * @details Inputs: timeWindowedCountsMaxCount, timeWindowedCountsInitialized
+ * @details Outputs: timeWindowedCountsMaxCount, timeWindowedCountsInitialized, alarm if
  * software fault occurred
  * @param cnt ID of the time windowed count to initialize
  * @param maxCnt maximum number of instances in the time window for this count
@@ -202,9 +229,8 @@
  * function for a given time windowed count.
  * *Note - thread protection not provided - assumed function will be called
  * by one task for a given time windowed count.
- * @details
- * Inputs: timeWindowedCounts, timeWindowedCountIndexes, timeWindowedCountCounts
- * Outputs: timeWindowedCounts, timeWindowedCountIndexes, timeWindowedCountCounts,
+ * @details Inputs: timeWindowedCounts, timeWindowedCountIndexes, timeWindowedCountCounts
+ * @details Outputs: timeWindowedCounts, timeWindowedCountIndexes, timeWindowedCountCounts,
  * alarm if a software fault occurred
  * @param cnt ID of the time windowed count to add an instance to
  * @return TRUE if this instances brings the count to the maximum within
@@ -247,9 +273,8 @@
  * The getCriticalData function gets the value for a given critical data
  * record.  The integrity of the critical data is checked first.  If the
  * critical data record fails the integrity check, a fault is triggered.
- * @details
- * Inputs: none
- * Outputs: alarm if HD critical error occurred
+ * @details Inputs: none
+ * @details Outputs: alarm if HD critical error occurred
  * @param data Ptr to a critical data record
  * @return The data from a critical data record
  *************************************************************************/
@@ -284,9 +309,8 @@
  * @brief
  * The isCriticalDataInRange function determines whether a critical data
  * value is within the range set for that critical data.
- * @details
- * Inputs: none
- * Outputs: none
+ * @details Inputs: none
+ * @details Outputs: none
  * @param data Ptr to a critical data record
  * @return TRUE if given data is in range, FALSE if not
  *************************************************************************/
@@ -323,9 +347,8 @@
  * @brief
  * The setCriticalData function sets the value for a given critical data
  * record.
- * @details
- * Inputs: none
- * Outputs: alarm if HD critical error occurred
+ * @details Inputs: none
+ * @details Outputs: alarm if HD critical error occurred
  * @param data Ptr to a critical data record
  * @param value a value to set
  * @return TRUE if set was successful, FALSE if not (out of range)
@@ -365,9 +388,8 @@
 /*********************************************************************//**
  * @brief
  * The resetCriticalData function resets a critical data record.
- * @details
- * Inputs: none
- * Outputs: Given critical data record is reset to unset w/ default value.
+ * @details Inputs: none
+ * @details Outputs: Given critical data record is reset to unset w/ default value.
  * @param data Ptr to a critical data record
  * @return none
  *************************************************************************/