Index: firmware/App/Controllers/BloodFlow.h
===================================================================
diff -u -rf3a26c402a2ec88f5ee7dbb8eb7127ab5b4692aa -r794a0f21a465227d432a91d7b7fd7d513cfe3ecb
--- firmware/App/Controllers/BloodFlow.h	(.../BloodFlow.h)	(revision f3a26c402a2ec88f5ee7dbb8eb7127ab5b4692aa)
+++ firmware/App/Controllers/BloodFlow.h	(.../BloodFlow.h)	(revision 794a0f21a465227d432a91d7b7fd7d513cfe3ecb)
@@ -35,6 +35,7 @@
 #define MAX_SET_BLOOD_FLOW_RATE             500             ///< Maximum prescribed blood flow rate (in mL/min).
 #define MIN_SET_BLOOD_FLOW_RATE             100             ///< Minimum prescribed blood flow rate (in mL/min).
 
+#pragma pack(push, 1)
 /// Payload record structure for a blood pump data message.
 typedef struct
 {
@@ -48,6 +49,7 @@
     U32 h4PresFlow;                                         ///< Prescribed blood flow in mL/min.
     U32 h4RotorHallState;                                   ///< Rotor hall state (1=home, 0=not home).
 } BLOOD_PUMP_STATUS_PAYLOAD_T;
+#pragma pack(pop)
 
 // ********** public function prototypes **********
 
@@ -58,7 +60,6 @@
 BOOL setBloodPumpTargetFlowRate( U32 flowRate, MOTOR_DIR_T dir, PUMP_CONTROL_MODE_T mode );
 BOOL setBloodPumpTargetRPM( U32 rpm, MOTOR_DIR_T dir );
 void signalBloodPumpHardStop( void );
-void signalBloodPumpRotorHallSensor( void );
 BOOL homeBloodPump( void );
 BOOL isBloodPumpRunning( void );
 BOOL isBloodPumpRampComplete( void );