Index: firmware/App/Services/FpgaRO.c
===================================================================
diff -u -ra1907314deab28c20945cd41d2d167924daf2c08 -r08fd3b3564f6852dec6d2038d37f66b8692fdf44
--- firmware/App/Services/FpgaRO.c	(.../FpgaRO.c)	(revision a1907314deab28c20945cd41d2d167924daf2c08)
+++ firmware/App/Services/FpgaRO.c	(.../FpgaRO.c)	(revision 08fd3b3564f6852dec6d2038d37f66b8692fdf44)
@@ -38,6 +38,9 @@
 #define MAX_FPGA_COMM_FAILURES              3                                   ///< FPGA maximum comm failures per MAX_FPGA_COMM_FAILURES_WINDOW_MS
 #define MIN_POWER_ON_TIME_FOR_COMM_FAILS    ( 1 * MS_PER_SECOND )               ///< Allow FPGA comm errors for first second after power-up
 
+#define HEATER_ENABLED                      0x01                                ///< Heater enable bit.
+#define HEATER_DISABLED                     0x00                                ///< Heater disabled.
+
 #define FPGA_CONDUCTIVITY_RESET_BIT             0x01                            ///< Conductivity Sensor reset bit mask.
 #define FPGA_CONDUCTIVITY_INIT_ENABLE_BIT       0x02                            ///< Conductivity Sensor initialization enable bit mask.
 #define FPGA_CONDUCTIVITY_WR_ENABLE_BIT         0x04                            ///< Conductivity Sensor write enable bit mask.
@@ -403,27 +406,29 @@
 
 /*********************************************************************//**
  * @brief
- * The setROPumpPWMPct function sets the RO pump PWM duty cycle.
+ * The setROPumpPWM function sets the RO pump PWM duty cycle.
  * The higher the PWM duty cycle (0..500), the faster the pump will go.
+ * @note PWM values < 5% or > 95% will cause pump to stop so effective
+ * range is actually 25..475.
  * @details \b Inputs: none
  * @details \b Outputs: fpgaActuatorSetPoints.roPumpPWMDutyCyclePct
  * @param pwm PWM duty cycle magnitude
  * @return none
  *************************************************************************/
-void setROPumpPWMPct( U16 pwm )
+void setROPumpPWM( U16 pwm )
 {
    fpgaActuatorSetPoints.roPumpPWMDutyCyclePct = pwm;
 }
 
 /*********************************************************************//**
  * @brief
- * The getROPumpPWMPct function gets a read back from FPGA of RO pump PWM
+ * The getROPumpPWM function gets a read back from FPGA of RO pump PWM
  * duty cycle.
  * @details \b Inputs: fpgaSensorReadings.roPumpPWMReadback
  * @details \b Outputs: none
  * @return measured speed (RPM) of the RO pump
  *************************************************************************/
-U16 getROPumpPWMPct( void )
+U16 getROPumpPWM( void )
 {
     return fpgaSensorReadings.roPumpPWMReadback;
 }
@@ -443,6 +448,42 @@
 
 /*********************************************************************//**
  * @brief
+ * The setFPGAHeaterEnabled function sets the heater enable on or off.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.heaterControl
+ * @param enable Flag indicating whether to enable or disable the heater.
+ * @return none
+ *************************************************************************/
+void setFPGAHeaterEnabled( BOOL enable )
+{
+    if ( TRUE == enable )
+    {
+        fpgaActuatorSetPoints.heaterControl = HEATER_ENABLED;
+    }
+    else
+    {
+        fpgaActuatorSetPoints.heaterControl = HEATER_DISABLED;
+    }
+}
+
+/*********************************************************************//**
+ * @brief
+ * The setFPGAHeaterPWM function sets the heater PWM duty cycle.
+ * The higher the PWM duty cycle (0..500), the faster the pump will go.
+ * @note PWM values < 5% or > 95% will cause heater to go off so effective
+ * range is actually 25..475.
+ * @details \b Inputs: none
+ * @details \b Outputs: fpgaActuatorSetPoints.heaterPWMDutyCyclePct
+ * @param pwm PWM duty cycle magnitude
+ * @return none
+ *************************************************************************/
+void setFPGAHeaterPWM( U16 pwm )
+{
+    fpgaActuatorSetPoints.heaterPWMDutyCyclePct = pwm;
+}
+
+/*********************************************************************//**
+ * @brief
  * The getFPGAPRiRawPressure function gets the PRi pressure reading.
  * @details \b Inputs: fpgaSensorReadings.pressurePri
  * @details \b Outputs: none