Index: firmware/App/Services/FpgaDD.c
===================================================================
diff -u -r521cd469ec8e35476a27475170848d0f62aa0ec8 -ra9983d3e6b07e7c927fab3d16e80b715594fe221
--- firmware/App/Services/FpgaDD.c	(.../FpgaDD.c)	(revision 521cd469ec8e35476a27475170848d0f62aa0ec8)
+++ firmware/App/Services/FpgaDD.c	(.../FpgaDD.c)	(revision a9983d3e6b07e7c927fab3d16e80b715594fe221)
@@ -65,6 +65,11 @@
 #define FPGA_D43_WR_ENABLE_BIT          0x40                    ///< Conductivity Sensor D43 write enable bit mask.
 #define FPGA_D43_RD_ENABLE_BIT          0x80                    ///< Conductivity Sensor D43 read enable bit mask.
 
+#define FPGA_D74_RESET_BIT              0x01                    ///< Conductivity Sensor D74 reset bit mask.
+#define FPGA_D74_INIT_ENABLE_BIT        0x02                    ///< Conductivity Sensor D74 Initialization enable bit mask.
+#define FPGA_D74_WR_ENABLE_BIT          0x04                    ///< Conductivity Sensor D74 write enable bit mask.
+#define FPGA_D74_RD_ENABLE_BIT          0x08                    ///< Conductivity Sensor D74 read enable bit mask.
+
 // Assuming all valves are ON/OFF based control ( No PWM control used)
 #define FPGA_ENABLE_VALVES_PWM          0x0000                  ///< FPGA enable valves PWM.
 #define FPGA_ENABLE_BC_VALVES_PWM       0x00                    ///< FPGA enable Balancing chamber valves PWM.
@@ -233,6 +238,12 @@
     U08 fpgaFloater2Status;                 ///< Reg 427. Floater 2 level sensor status
     U16 fpgaD11PumpStepCountStatus;         ///< Reg 428. Acid concentrate pump revolution down count status
     U16 fpgaD10PumpStepCountStatus;         ///< Reg 430. Bicarb concentrate pump revolution down count status
+
+    U32 fpgaD74CondDataOut;                 ///< Reg 432. Data read from Conductivity Sensor D74 register
+    U16 fpgaD74CondCond;                    ///< Reg 436. D74 conductivity
+    U16 fpgaD74CondTemp;                    ///< Reg 438. D74 Temperature
+    U08 fpgaD74CondReadCnt;                 ///< Reg 440. D74 successful read count
+    U08 fpgaD74CondErrorCnt;                ///< Reg 441. D74 error read count
 } DD_FPGA_SENSORS_T;
 
 typedef struct
@@ -327,6 +338,11 @@
     U08 fpgaGPIOControl;                    ///< Reg 147. FPGA GPIO control interface
     U16 fpgaACRelayPWMLow;                  ///< Reg 148. Length of time in 10us resoultion that PWM output stays low.
     U16 fpgaACRelayPWMPeriod;               ///< Reg 150. PWM period for AC relay/heater.
+
+    U08 fpgaConSensD74Control;              ///< Reg 152. Conductivity/Temperature Sensors D74 Control registers
+    U16 fpgaConSensD74_Addrs;               ///< Reg 153. D74 Initialization Address register
+    U32 fpgaConSensD74_Data_In;             ///< Reg 155. D74 Initialization data register
+
 } FPGA_ACTUATORS_T;
 #pragma pack(pop)
 
@@ -1167,6 +1183,125 @@
 
 /*********************************************************************//**
  * @brief
+ * The setFPGAD74CondReset function resets the FPGA Conductivity
+ * Sensor D74.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @return none
+ *************************************************************************/
+void setFPGAD74CondReset( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control |= FPGA_D74_RESET_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The clearFPGAD74CondReset function clears the reset of FPGA Conductivity
+ * Sensor D74.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @return none
+ *************************************************************************/
+void clearFPGAD74CondReset( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control &= ~FPGA_D74_RESET_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The setFPGAD74CondInitEnable function enables the FPGA Conductivity
+ * Sensor D74 initialzation procedure.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @return none
+ *************************************************************************/
+void setFPGAD74CondInitEnable( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control |= FPGA_D74_INIT_ENABLE_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The clearFPGAD74CondInitEnable function clears the init process of FPGA Conductivity
+ * Sensor D74.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @return none
+ *************************************************************************/
+void clearFPGAD74CondInitEnable( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control &= ~FPGA_D74_INIT_ENABLE_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The setFPGAD74CondWriteEnable function enables the FPGA Conductivity
+ * Sensor D74 write transaction.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @warning: The address (setFPGACD74Address) and data (setFPGACD74Data) register
+ * must be populated before invoking this write enable function to initiate
+ * write transaction with the sensor.
+ * @return none
+ *************************************************************************/
+void setFPGAD74CondWriteEnable( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control |= FPGA_D74_WR_ENABLE_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The clearFPGAD74CondWriteEnable function clears the write enable of FPGA Conductivity
+ * Sensor D74.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @return none
+ *************************************************************************/
+void clearFPGAD74CondWriteEnable( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control &= ~FPGA_D74_WR_ENABLE_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The setFPGAD74CondReadEnable function enables the FPGA Conductivity
+ * Sensor D74 read transaction.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @warning: The address (setFPGACD74Address) register must be populated
+ * before invoking this read enable function to initiate read transaction
+ * with the sensor.
+ * @return none
+ *************************************************************************/
+void setFPGAD74CondReadEnable( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control |= FPGA_D74_RD_ENABLE_BIT;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The clearFPGAD74CondReadEnable function clears the read enable of FPGA Conductivity
+ * Sensor D74.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param none
+ * @return none
+ *************************************************************************/
+void clearFPGAD74CondReadEnable( void )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control &= ~FPGA_D74_RD_ENABLE_BIT;
+}
+
+
+/*********************************************************************//**
+ * @brief
  * The setFpgaCD12Control function sets the FPGA Conductivity
  * Sensor control register for CD1&2.
  *      bit 7: Enables D27 read transaction (1), address needed
@@ -1211,6 +1346,25 @@
 
 /*********************************************************************//**
  * @brief
+ * The setFpgaCD5Control function sets the FPGA Conductivity
+ * Sensor control register for CD5.
+ *      bit 4- 7: Reserved.
+ *      bit 3: Enables D74 read transaction (1), address needed
+ *      bit 2: Enables D74 write transaction (1), address and data needs to be set
+ *      bit 1: Enable D74 Init procedure (1)
+ *      bit 0: reset D74 Conduct sensor (1)
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74Control
+ * @param control Conductivity sensor control set
+ * @return none
+ *************************************************************************/
+void setFPGACD5Control( U08 control )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74Control = control;
+}
+
+/*********************************************************************//**
+ * @brief
  * The setFPGACD12Address function sets the conductivity sensor
  * CD12 address register to perform read and write operations.
  * @details \b Inputs: none
@@ -1239,6 +1393,20 @@
 
 /*********************************************************************//**
  * @brief
+ * The setFPGACD5Address function sets the conductivity sensor
+ * D74 address register to perform read and write operations.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74_Addrs
+ * @param address The conductivity sensor CD74 address
+ * @return none
+ *************************************************************************/
+void setFPGACD5Address( U16 address )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74_Addrs = address;
+}
+
+/*********************************************************************//**
+ * @brief
  * The setFPGACD12Data function sets the conductivity sensor
  * CD12 data outputfor write operations.
  * @details \b Inputs: none
@@ -1267,6 +1435,20 @@
 
 /*********************************************************************//**
  * @brief
+ * The setFPGACD5Data function sets the conductivity sensor
+ * CD5 data outputfor write operations.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.fpgaConSensD74_Data_In
+ * @param data The conductivity sensor CD74 Data
+ * @return none
+ *************************************************************************/
+void setFPGACD5Data( U32 data )
+{
+    fpgaActuatorSetPoints.fpgaConSensD74_Data_In = data;
+}
+
+/*********************************************************************//**
+ * @brief
  * The setFPGAD5HeaterPWMControl function sets the primary heater
  * PWM input.
  * @details \b Inputs: none
@@ -2345,6 +2527,66 @@
 
 /*********************************************************************//**
  * @brief
+ * The getFPGAD74CondReadCount function gets D74 conductivity sensor read count.
+ * @details \b Inputs: fpgaSensorReadings.fpgaD74CondReadCnt
+ * @details \b Outputs: none
+ * @return Latest D74 conductivity sensor read count
+ *************************************************************************/
+U08 getFPGAD74CondReadCount( void )
+{
+    return fpgaSensorReadings.fpgaD74CondReadCnt;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The getFPGAD74CondErrorCount function gets D74 conductivity sensor error count.
+ * @details \b Inputs: fpgaSensorReadings.fpgaD74CondErrorCnt
+ * @details \b Outputs: none
+ * @return Latest D74 conductivity sensor read error count
+ *************************************************************************/
+U08 getFPGAD74CondErrorCount( void )
+{
+    return fpgaSensorReadings.fpgaD74CondErrorCnt;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The getFPGAD74Cond function gets D74 conductivity sensor value.
+ * @details \b Inputs: fpgaSensorReadings.fpgaD74Cond
+ * @details \b Outputs: none
+ * @return Latest D74 conductivity sensor value
+ *************************************************************************/
+U16 getFPGAD74Cond( void )
+{
+    return fpgaSensorReadings.fpgaD74CondCond;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The getFPGAD74CondTemp function gets D74 conductivity sensor temperature value.
+ * @details \b Inputs: fpgaSensorReadings.fpgaD74CondTemp
+ * @details \b Outputs: none
+ * @return Latest D74 conductivity sensor temperature value
+ *************************************************************************/
+U16 getFPGAD74CondTemp( void )
+{
+    return fpgaSensorReadings.fpgaD74CondTemp;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The getFPGAD74CondData function gets D74 conductivity sensor register value.
+ * @details \b Inputs: fpgaSensorReadings.fpgaD74CondDataOut
+ * @details \b Outputs: none
+ * @return Latest D74 conductivity sensor register data value
+ *************************************************************************/
+U32 getFPGAD74CondData( void )
+{
+    return fpgaSensorReadings.fpgaD74CondDataOut;
+}
+
+/*********************************************************************//**
+ * @brief
  * The getFPGAD63LevelSensor function gets the latest FPGA D63 level sensor
  * reading.
  * @details \b Inputs: fpgaSensorReadings.fpgaD63LevelSensor