Index: firmware/App/Controllers/SyringePump.h
===================================================================
diff -u -r46b163d19c65e8c21db7b0247bbb1af0dba1ece5 -rcd5be724d5a3ba7457e761191d82f278654d7f5c
--- firmware/App/Controllers/SyringePump.h	(.../SyringePump.h)	(revision 46b163d19c65e8c21db7b0247bbb1af0dba1ece5)
+++ firmware/App/Controllers/SyringePump.h	(.../SyringePump.h)	(revision cd5be724d5a3ba7457e761191d82f278654d7f5c)
@@ -1,14 +1,14 @@
 /**************************************************************************
 *
-* Copyright (c) 2021-2022 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2021-2024 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    SyringePump.h
 *
 * @author  (last)      Sean Nash
-* @date    (last)      09-Aug-2022
+* @date    (last)      31-Aug-2023
 *
 * @author  (original)  Sean Nash
 * @date    (original)  04-Mar-2021
@@ -32,16 +32,19 @@
 
 // ********** public definitions **********
 
+#define SYRINGE_PUMP_PRIME_VOLUME_ML                  0.353F                                ///< Target syringe prime volume (in mL).
+#define SYRINGE_PUMP_FILL_VOLUME_OFFSET_ML            0.8F                                  ///< Advised fill volume offset due to HW variance.
+
 /// Enumeration of syringe pump operations.
 typedef enum SyringePumpOperations
 {
-    SYRINGE_PUMP_OP_STOP = 0,
-    SYRINGE_PUMP_OP_RETRACT = 1,
-    SYRINGE_PUMP_OP_SEEK = 2,
-    SYRINGE_PUMP_OP_PRIME = 3,
-    SYRINGE_PUMP_OP_BOLUS = 4,
-    SYRINGE_PUMP_OP_CONTINUOUS = 5,
-    NUM_OF_SYRINGE_PUMP_OPS
+    SYRINGE_PUMP_OP_STOP = 0,                       ///< Syringe pump stopped - no operation.
+    SYRINGE_PUMP_OP_RETRACT = 1,                    ///< Syringe pump retract operation.  Retract to home postion.
+    SYRINGE_PUMP_OP_SEEK = 2,                       ///< Syringe pump seek operation.  Seek syringe plunger.
+    SYRINGE_PUMP_OP_PRIME = 3,                      ///< Syringe pump prime operation.  Prime Heparin line.
+    SYRINGE_PUMP_OP_BOLUS = 4,                      ///< Syringe pump bolus operation.  Deliver bolus volume of Heparin.
+    SYRINGE_PUMP_OP_CONTINUOUS = 5,                 ///< Syringe pump continuous dispense operation.  Deliver Heparin at set rate.
+    NUM_OF_SYRINGE_PUMP_OPS = 6                     ///< Number of syringe pump operation.
 } SYRINGE_PUMP_OPERATION_T;
 
 /// Payload record structure for the syringe pump operation request message.
@@ -72,6 +75,7 @@
 typedef struct
 {
     F32 syringePumpVolumeDelivered;     ///< Syringe pump volume delivered.
+    F32 syringePumpVolumeRequired;      ///< Syringe pump volume required for therapy.
 } SYRINGE_PUMP_VOLUME_DATA_T;
 
 // ********** public function prototypes **********
@@ -86,11 +90,13 @@
 void setHeparinStopped( void );
 void setHeparinCompleted( void );
 HEPARIN_STATE_T getHeparinState( void );
+void resetPreLoadStatus( void );
 void stopSyringePump( void );
 BOOL retractSyringePump( void );
+BOOL preloadSyringePlunger( void );
 BOOL seekSyringePlunger( void );
 BOOL primeSyringePump( void );
-BOOL checkForPrimeOcclusion( void );
+BOOL checkForSyringeOcclusion( BOOL stopPump );
 BOOL startHeparinBolus( void );
 BOOL startHeparinContinuous( void );
 BOOL setSyringePumpDACVref( void );
@@ -104,6 +110,7 @@
 BOOL isSyringeVolumeAdequate( void );
 BOOL isSyringePumpPrimed( void );
 BOOL isSyringePumpRunning( void );
+BOOL isSyringePumpPreLoaded( void );
 F32  getSyringePumpVolumeDelivered( void );
 
 BOOL testSetSyringePumpDataPublishIntervalOverride( U32 value );