Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -re963db266989fd82b8b6023bb1a139afcb45c091 -rc9e1a93ccd8cfbdc9737c8ffc9e6a3dbe9ba7c44
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision e963db266989fd82b8b6023bb1a139afcb45c091)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision c9e1a93ccd8cfbdc9737c8ffc9e6a3dbe9ba7c44)
@@ -39,8 +39,8 @@
 
 #define VENOUS_PRESSURE_OFFSET              ( 1638 )                                        ///< Offset for 14-bit venous pressure sensor reading.
 #define VENOUS_PRESSURE_SCALE               ( 14745 - VENOUS_PRESSURE_OFFSET )              ///< Scale for venous pressure sensor.
-#define VENOUS_PRESSURE_MIN                 ( 30.0 )                                        ///< Minimum of scale for venous pressure sensor reading (in TBD u/m).
-#define VENOUS_PRESSURE_MAX                 ( 90.0 )                                        ///< Maximum of scale for venous pressure sensor reading (in TBD u/m).
+#define VENOUS_PRESSURE_MIN                 ( -30.0 )                                       ///< Minimum of scale for venous pressure sensor reading (in PSI).
+#define VENOUS_PRESSURE_MAX                 ( 30.0 )                                        ///< Maximum of scale for venous pressure sensor reading (in PSI).
 
 #define PSI_TO_MMHG                         ( 51.7149 )                                     ///< Conversion factor for converting PSI to mmHg.
 
@@ -196,23 +196,28 @@
 {
     PRESSURE_STATE_T result = PRESSURE_CONTINUOUS_READ_STATE;
 
-    S32 artPres = getFPGAArterialPressure();
-    U16 venPres = getFPGAVenousPressure();
+    U32 fpgaArtPres = getFPGAArterialPressure();
+    S32 artPres = (S32)( fpgaArtPres & MASK_OFF_U32_MSB ) - 0x800000;   // subtract 2^23 from low 24 bits to get signed reading
+    U08 artPresAlarm = (U08)( fpgaArtPres >> 24 );                      // high byte is alarm code for arterial pressure
+    U16 fpgaVenPres = getFPGAVenousPressure();
+    U16 venPres = fpgaVenPres & 0x3FFF;                                 // 14-bit data
+    U08 venPresStatus = (U08)( fpgaVenPres >> 14 );                     // high 2 bits is status code for venous pressure
+    F32 venPresPSI = ( (F32)(venPres - VENOUS_PRESSURE_OFFSET) * (VENOUS_PRESSURE_MAX - VENOUS_PRESSURE_MIN) / (F32)VENOUS_PRESSURE_SCALE ) - VENOUS_PRESSURE_MIN;
     U16 bldOccl = getFPGABloodPumpOcclusion();
     U16 dliOccl = getFPGADialInPumpOcclusion();
     U16 dloOccl = getFPGADialOutPumpOcclusion();
-    F32 venPresPSI;
-
-    // TODO - convert ADC counts to mmHg for each sensor
-    arterialPressure.data = ARTERIAL_PRESSURE_V_PER_BIT * ( (F32)(artPres) / ( ARTERIAL_PRESSURE_SENSITIVITY * ARTERIAL_PRESSURE_V_BIAS ) );
-    venPresPSI = ( (F32)(venPres - VENOUS_PRESSURE_OFFSET) * (VENOUS_PRESSURE_MAX - VENOUS_PRESSURE_MIN) / (F32)VENOUS_PRESSURE_SCALE ) - VENOUS_PRESSURE_MIN;
+
+    // TODO - any filtering required???
+
+    // convert arterial pressure to mmHg
+    arterialPressure.data = ARTERIAL_PRESSURE_V_PER_BIT * ( (F32)(artPres) / ( ARTERIAL_PRESSURE_SENSITIVITY * ARTERIAL_PRESSURE_V_BIAS ) );
+    // convert venous pressure from PSI to mmHg
     venousPressure.data = venPresPSI * PSI_TO_MMHG;
+    // occlusion sensor values have no unit - take as is
     bloodPumpOcclusion.data = (F32)bldOccl;
     dialInPumpOcclusion.data = (F32)dliOccl;
     dialOutPumpOcclusion.data = (F32)dloOccl;
 
-    // TODO - any filtering required???
-
     // check for occlusions
     checkOcclusions();