Index: firmware/App/Drivers/GLXferPump.h
===================================================================
diff -u -rf267032333f872d729d33614f48373eeb6c422d2 -rfbb77dff1aeac3b26529790ad6af0e63f5a1f578
--- firmware/App/Drivers/GLXferPump.h	(.../GLXferPump.h)	(revision f267032333f872d729d33614f48373eeb6c422d2)
+++ firmware/App/Drivers/GLXferPump.h	(.../GLXferPump.h)	(revision fbb77dff1aeac3b26529790ad6af0e63f5a1f578)
@@ -33,14 +33,18 @@
 
 // ********** public definitions **********
 
-#define AIR_PUMP_MOTOR_OFF            0.0f            ///< Power level setting (PWM) for H12 air pump to turn pump off.
+#define AIR_PUMP_MOTOR_OFF            0.0F            ///< Power level setting (PWM) for H12 air pump to turn pump off.
+#define AIR_PUMP_DUTY_CYCLE_MIN       0.0F            ///< Air pump minimum duty cycle in percentage
+#define AIR_PUMP_DUTY_CYCLE_MAX       100.0F          ///< Air pump maximum duty cycle in percentage
+#define AIR_PUMP_MAX_PWM              250             ///< Air pump maximum PWM, FPGA ignores 251-255
 
 // ********** public function prototypes **********
 
 void initGasLiqXferPumpDriver( void );
 U16 getAirPumpMotorRPM( void );
 void setAirPumpMotorPower( F32 power );
 F32 getAirPumpMotorPower( void );
+U16 getAirPumpMotorRPM( void );
 
 BOOL testSetAirPump( MESSAGE_T *message );