Index: firmware/App/Drivers/PeristalticPump.c
===================================================================
diff -u -r395522dffef1348e176564925656012f529c1910 -rfbe7e9a870c7ad78d3bd26f0f5cbb0277c733ac3
--- firmware/App/Drivers/PeristalticPump.c	(.../PeristalticPump.c)	(revision 395522dffef1348e176564925656012f529c1910)
+++ firmware/App/Drivers/PeristalticPump.c	(.../PeristalticPump.c)	(revision fbe7e9a870c7ad78d3bd26f0f5cbb0277c733ac3)
@@ -19,6 +19,7 @@
 #include "FpgaTD.h"
 #include "Messaging.h"
 #include "PeristalticPump.h"
+#include "Utilities.h"
 
 /**
  *  @addtogroup PeristalticPump
@@ -51,6 +52,8 @@
 static F32 pumpMeasRotSpeedRPM;                                                 ///< Latest measured pump rotor speed (in RPM).
 static BOOL pumpHomeInProgress;                                                 ///< Flag indicates a pump home operation is in progress.
 static BOOL pumpHomeLowSignalSeen;                                              ///< Flag indicates a pump home operation has seen a "not home" signal.
+static U16 rotorRevsPrev;                                                       ///< Previous FPGA rotor revs counter value.
+static U32 rotorRevsAccum;                                                      ///< Accumulated rotor revolutions count.
 
 // ********** private function prototypes **********
 
@@ -70,6 +73,9 @@
     pumpMeasSpeedRPM      = 0.0F;
     pumpMeasRotSpeedRPM   = 0.0F;
 
+    rotorRevsPrev  = getH4RotorRevsCounter();
+    rotorRevsAccum = 0;
+
     setH4Direction( MOTOR_DIR_FORWARD );
     setH4SetSpeed( 0 );
     setH4Enabled( TRUE );
@@ -87,8 +93,10 @@
  *************************************************************************/
 void readPeristalticPumps( void )
 {
-    U16 period = getH4Period();
-    S16 rotPer = getH4RotorCount();
+    U16 delta;
+    U16 period       = getH4Period();
+    S16 rotPer       = getH4RotorCount();
+    U16 rotorRevsNow = getH4RotorRevsCounter();
 
     // update measured pump motor speed
     if ( period != H4_ZERO_SPEED_PERIOD )
@@ -130,10 +138,28 @@
     {
         pumpHomeLowSignalSeen = TRUE;
     }
+
+    // update accumulated rotor revolutions count (extend 16-bit FPGA counter to 32-bit)
+    delta = u16DiffWithWrap( rotorRevsPrev, rotorRevsNow );
+    rotorRevsAccum += (U32)delta;
+    rotorRevsPrev = rotorRevsNow;
 }
 
 /*********************************************************************//**
  * @brief
+ * The getPeristalticPumpRotorRevs function returns the accumulated
+ * rotor revolutions count for the blood pump.
+ * @details \b Inputs: rotorRevsAccum
+ * @details \b Outputs: none
+ * @return Accumulated rotor revolutions count.
+ *************************************************************************/
+U32 getPeristalticPumpRotorRevs( void )
+{
+    return rotorRevsAccum;
+}
+
+/*********************************************************************//**
+ * @brief
  * The cmdPeristalticPumpHome function initiates a pump home operation.
  * @details \b Inputs: none
  * @details \b Outputs: pumpHomeInProgress, FPGA