Index: firmware/App/Controllers/Pressures.c
===================================================================
diff -u -r68fc03b5a22f14190146fc9069f022c109682b63 -r16dfbeeca1bcf1d2115c2f7549999fdaae0700e9
--- firmware/App/Controllers/Pressures.c	(.../Pressures.c)	(revision 68fc03b5a22f14190146fc9069f022c109682b63)
+++ firmware/App/Controllers/Pressures.c	(.../Pressures.c)	(revision 16dfbeeca1bcf1d2115c2f7549999fdaae0700e9)
@@ -17,6 +17,7 @@
 #include "Pressures.h"
 #include "AlarmMgmt.h"
 #include "FPGA.h"
+#include "InternalADC.h"
 #include "OperationModes.h"
 #include "SystemCommMessages.h"
 #include "TaskPriority.h"
@@ -30,8 +31,11 @@
 // ********** private definitions **********
 
 /// Default publication interval for pressure and occlusion data.
-#define PRESSURES_DATA_PUB_INTERVAL        ( MS_PER_SECOND / TASK_PRIORITY_INTERVAL )  ///< interval (ms/task time) at which the pressures data is published on the CAN bus.
+#define PRESSURES_DATA_PUB_INTERVAL         ( MS_PER_SECOND / TASK_PRIORITY_INTERVAL )  ///< interval (ms/task time) at which the pressures data is published on the CAN bus.
 
+#define PUMP_PRESSURE_ZERO                  0x309        ///< ADC counts equivalent to 0 PSI for pump in/out pressure sensors.
+#define PUMP_PRESSURE_PSI_PER_COUNT         0.06343      ///< PSI per ADC count conversion factor for pump in/out pressure sensors.
+
 /// Defined states for the pressures monitor state machine.
 typedef enum PresOccl_States
 {
@@ -60,6 +64,7 @@
 static PRESSURE_SELF_TEST_STATE_T pressuresSelfTestState = PRESSURE_SELF_TEST_STATE_START;  ///< current pressure self test state.
 static U32 pressuresSelfTestTimerCount = 0;                                     ///< timer counter for pressure self test.
 
+
 // ********** private function prototypes **********
 
 static PRESSURE_STATE_T handlePressuresInitState( void );
@@ -143,16 +148,16 @@
 {
     PRESSURE_STATE_T result = PRESSURE_CONTINUOUS_READ_STATE;
 
-    U16 roIn = getFPGAROPumpInletPressure();
-    U16 roOut = getFPGAROPumpOutletPressure();
-    U16 drainIn = getFPGADrainPumpInletPressure();
-    U16 drainOut = getFPGADrainPumpOutletPressure();
+    S32 roIn = (S32)getIntADCReading( INT_ADC_RO_PUMP_INLET_PRESSURE );
+    S32 roOut = (S32)getIntADCReading( INT_ADC_RO_PUMP_OUTLET_PRESSURE );
+    S32 drainIn = (S32)getIntADCReading( INT_ADC_DRAIN_PUMP_OUTLET_PRESSURE );
+    S32 drainOut = (S32)getIntADCReading( INT_ADC_DRAIN_PUMP_INLET_PRESSURE );
 
-    // TODO - convert ADC counts to mmHg for each sensor
-    pressures[ PRESSURE_SENSOR_RO_PUMP_INLET ].data = (F32)roIn;
-    pressures[ PRESSURE_SENSOR_RO_PUMP_OUTLET ].data = (F32)roOut;
-    pressures[ PRESSURE_SENSOR_DRAIN_PUMP_INLET ].data = (F32)drainIn;
-    pressures[ PRESSURE_SENSOR_DRAIN_PUMP_OUTLET ].data = (F32)drainOut;
+    // convert ADC counts to PSI for each sensor
+    pressures[ PRESSURE_SENSOR_RO_PUMP_INLET ].data = (F32)( roIn - PUMP_PRESSURE_ZERO ) * PUMP_PRESSURE_PSI_PER_COUNT;
+    pressures[ PRESSURE_SENSOR_RO_PUMP_OUTLET ].data = (F32)( roOut - PUMP_PRESSURE_ZERO ) * PUMP_PRESSURE_PSI_PER_COUNT;
+    pressures[ PRESSURE_SENSOR_DRAIN_PUMP_INLET ].data = (F32)( drainIn - PUMP_PRESSURE_ZERO ) * PUMP_PRESSURE_PSI_PER_COUNT;
+    pressures[ PRESSURE_SENSOR_DRAIN_PUMP_OUTLET ].data = (F32)( drainOut - PUMP_PRESSURE_ZERO ) * PUMP_PRESSURE_PSI_PER_COUNT;
 
     // TODO - any filtering required???
 
@@ -246,7 +251,7 @@
         F32 drainIn = getMeasuredDGPressure( PRESSURE_SENSOR_DRAIN_PUMP_INLET );
         F32 drainOut = getMeasuredDGPressure( PRESSURE_SENSOR_DRAIN_PUMP_OUTLET );
 
-        broadcastPressuresData( roIn, roOut, drainIn, drainOut );
+        broadcastPressureSensorsData( roIn, roOut, drainIn, drainOut );
         pressuresDataPublicationTimerCounter = 0;
     }
 }