Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r340ca3700bbc4235d85d82864597fe17ab4b557a -r91aa11a47f3b3c744cbbfd9e9c1bd240263aa1bd
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 340ca3700bbc4235d85d82864597fe17ab4b557a)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 91aa11a47f3b3c744cbbfd9e9c1bd240263aa1bd)
@@ -31,6 +31,8 @@
 #include "OperationModes.h"
 #include "SystemComm.h"
 #include "SystemCommMessages.h"
+#include "TaskGeneral.h"
+#include "Timers.h"
 #ifdef EMC_TEST_BUILD     // TODO - test code
 #include "FPGA.h"
 #endif
@@ -42,19 +44,30 @@
 
 // ********** private definitions **********
 
+#define DISINFECTS_DATA_PUB_INTERVAL          ( 4 * MS_PER_SECOND / TASK_GENERAL_INTERVAL )    ///< Disinfects data publish interval in counts.
+
 // ********** private data **********
 
-static HD_STANDBY_STATE_T currentStandbyState;                      ///< Current state (sub-mode) of standby mode.
+static HD_STANDBY_STATE_T currentStandbyState;                                                 ///< Current state (sub-mode) of standby mode.
 
-static BOOL treatStartReqReceived = FALSE;                          ///< Flag indicates user has requested initiation of a treatment
+static BOOL treatStartReqReceived = FALSE;                                                     ///< Flag indicates user has requested initiation of a treatment.
+static BOOL flushStartReqReceived = FALSE;                                                     ///< Flag indicates user has requested initiation of flush mode.
+static BOOL heatDisinfectStartReqReceived = FALSE;                                             ///< Flag indicates user has requested initiation of heat disinfect mode.
+static BOOL chemDisinfectStartReqReceived = FALSE;                                             ///< Flag indicates user has requested initiation of chemical disinfect mode.
+static U32 dataPublishCounter = 0;                                                             ///< Disinfects data publish counter.
+static BOOL hasDisinfectCmdBeenSet = FALSE;                                                    ///< Flag indicates that a disinfect command has been set.
+static DG_DISINFECT_STATE_T dgDisinfectState;                                                  ///< DG disinfect state to be boadcast to UI.
 
 // ********** private function prototypes **********
 
-static HD_STANDBY_STATE_T handleStandbyWait4TreatmentState( void );
-static HD_STANDBY_STATE_T handleStandbyDGFlushState( void );
-static HD_STANDBY_STATE_T handleStandbyDGHeatDisinfectState( void );
-static HD_STANDBY_STATE_T handleStandbyDGChemDisinfectState( void );
+static HD_STANDBY_STATE_T handleStandbyModeWaitForTreatmentState( void );
+static HD_STANDBY_STATE_T handleStandbyModeWaitForDisinfectState( void );
+static HD_STANDBY_STATE_T handleStandbyModeDGFlushInProgressState( void );
+static HD_STANDBY_STATE_T handleStandbyModeDGHeatDisinfectInProgressState( void );
+static HD_STANDBY_STATE_T handleStandbyModeDGChemDisininfectInProgressState( void );
 
+static void publishDisinfectData( void );
+
 /*********************************************************************//**
  * @brief
  * The initStandbyMode function initializes the Standby Mode module.
@@ -64,8 +77,12 @@
  *************************************************************************/
 void initStandbyMode( void )
 {
-    currentStandbyState = STANDBY_START_STATE;
-    treatStartReqReceived = FALSE;
+    currentStandbyState    = STANDBY_START_STATE;
+    treatStartReqReceived  = FALSE;
+    flushStartReqReceived  = FALSE;
+    dataPublishCounter     = 0;
+    hasDisinfectCmdBeenSet = FALSE;
+    dgDisinfectState       = DG_DISINFECT_NOT_RUNNING_STATE;
 }
 
 /*********************************************************************//**
@@ -123,20 +140,27 @@
             break;
 
         case STANDBY_WAIT_FOR_TREATMENT_STATE:
-            currentStandbyState = handleStandbyWait4TreatmentState();
+            currentStandbyState = handleStandbyModeWaitForTreatmentState();
             break;
 
+        case STANDBY_WAIT_FOR_DISINFECT_STATE:
+            currentStandbyState = handleStandbyModeWaitForDisinfectState();
+            break;
+
         case STANDBY_DG_FLUSH_IN_PROGRESS_STATE:
+            currentStandbyState = handleStandbyModeDGFlushInProgressState();
             break;
 
         case STANDBY_DG_HEAT_DISINFECT_IN_PROGRESS_STATE:
+            currentStandbyState = handleStandbyModeDGHeatDisinfectInProgressState();
             break;
 
         case STANDBY_DG_CHEM_DISINFECT_IN_PROGRESS_STATE:
+            currentStandbyState = handleStandbyModeDGChemDisininfectInProgressState();
             break;
 
         default:
-            // TODO - s/w fault
+            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_HD_SOFTWARE_FAULT, SW_FAULT_ID_HD_STANDBY_INVALID_STATE, currentStandbyState );
             currentStandbyState = STANDBY_START_STATE;
             break;
     }
@@ -358,4 +382,326 @@
     // Alarm actions not handled in Standby mode
 }
 
+/*********************************************************************//**
+ * @brief
+ * The signalUserInitiateFlushMode function handles user initiation of flush
+ * mode.
+ * @details Inputs: currentStandbyState
+ * @details Outputs: flushStartReqReceived
+ * @return TRUE if signal accepted, FALSE if not
+ *************************************************************************/
+BOOL signalUserInitiateFlushMode( void )
+{
+    BOOL result = FALSE;
+    REQUEST_REJECT_REASON_CODE_T rejReason = REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE;
+
+    if ( ( MODE_STAN == getCurrentOperationMode() ) && ( STANDBY_WAIT_FOR_DISINFECT_STATE == currentStandbyState ) )
+    {
+        if ( TRUE == isDGCommunicating() )
+        {
+            flushStartReqReceived = TRUE;
+            result = TRUE;
+            rejReason = REQUEST_REJECT_REASON_NONE;
+        }
+        else
+        {
+            rejReason = REQUEST_REJECT_REASON_DG_COMM_LOST;
+        }
+    }
+
+    sendDisinfectConfirmResponse( result, rejReason );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The signalUserInitiateFlushMode function handles user initiation of heat
+ * disinfect mode.
+ * @details Inputs: currentStandbyState
+ * @details Outputs: heatDisinfectStartReqReceived
+ * @return TRUE if signal accepted, FALSE if not
+ *************************************************************************/
+BOOL signalUserInitiateHeatDisinfectMode( void )
+{
+    BOOL result = FALSE;
+    REQUEST_REJECT_REASON_CODE_T rejReason = REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE;
+
+    if ( ( MODE_STAN == getCurrentOperationMode() ) && ( STANDBY_WAIT_FOR_DISINFECT_STATE == currentStandbyState ) )
+    {
+        if ( TRUE == isDGCommunicating() )
+        {
+            heatDisinfectStartReqReceived = TRUE;
+            result = TRUE;
+            rejReason = REQUEST_REJECT_REASON_NONE;
+        }
+        else
+        {
+            rejReason = REQUEST_REJECT_REASON_DG_COMM_LOST;
+        }
+    }
+
+    sendDisinfectConfirmResponse( result, rejReason );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The signalUserInitiateChemicalDisinfectMode function handles user
+ * initiation of chemical disinfect mode.
+ * @details Inputs: currentStandbyState
+ * @details Outputs: chemDisinfectStartReqReceived
+ * @return TRUE if signal accepted, FALSE if not
+ *************************************************************************/
+BOOL signalUserInitiateChemicalDisinfectMode( void )
+{
+    BOOL result = FALSE;
+    REQUEST_REJECT_REASON_CODE_T rejReason = REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE;
+
+    if ( ( MODE_STAN == getCurrentOperationMode() ) && ( STANDBY_WAIT_FOR_DISINFECT_STATE == currentStandbyState ) )
+    {
+        if ( TRUE == isDGCommunicating() )
+        {
+            chemDisinfectStartReqReceived = TRUE;
+            result = TRUE;
+            rejReason = REQUEST_REJECT_REASON_NONE;
+        }
+        else
+        {
+            rejReason = REQUEST_REJECT_REASON_DG_COMM_LOST;
+        }
+    }
+
+    sendDisinfectConfirmResponse( result, rejReason );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The signalInitiateStandbyDisinfectSubmode function handles user
+ * initiation of setting the disinfects submode.
+ * @details Inputs: currentStandbyState
+ * @details Outputs: currentStandbyState
+ * @return TRUE if signal accepted, FALSE if not
+ *************************************************************************/
+BOOL signalInitiateStandbyDisinfectSubmode( void )
+{
+    BOOL result = FALSE;
+    REQUEST_REJECT_REASON_CODE_T rejReason = REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE;
+
+    if ( ( MODE_STAN == getCurrentOperationMode() ) && ( STANDBY_WAIT_FOR_TREATMENT_STATE == currentStandbyState ) )
+    {
+        if ( TRUE == isDGCommunicating() )
+        {
+            currentStandbyState = STANDBY_WAIT_FOR_DISINFECT_STATE;
+            result = TRUE;
+            rejReason = REQUEST_REJECT_REASON_NONE;
+        }
+        else
+        {
+            rejReason = REQUEST_REJECT_REASON_DG_COMM_LOST;
+        }
+    }
+
+    sendDisinfectConfirmResponse( result, rejReason );
+
+    return result;
+}
+
+// ********** private functions **********
+
+/*********************************************************************//**
+ * @brief
+ * The handleStandbyModeWaitForTreatmentState function handles wait for
+ * treatment state.
+ * @details Inputs: treatStartReqReceived
+ * @details Outputs: treatStartReqReceived
+ * @return next state of the standby mode state machine
+ *************************************************************************/
+static HD_STANDBY_STATE_T handleStandbyModeWaitForTreatmentState( void )
+{
+    HD_STANDBY_STATE_T state = STANDBY_WAIT_FOR_TREATMENT_STATE;
+
+    if ( TRUE == treatStartReqReceived )
+    {
+        // Initialize treatment modes before starting a new treatment
+        initTreatParamsMode();
+        initPreTreatmentMode();
+        initTreatmentMode();
+        initPostTreatmentMode();
+        // Start treatment workflow with treatment parameters mode
+        requestNewOperationMode( MODE_TPAR );
+        treatStartReqReceived = FALSE;
+    }
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleStandbyModeWaitForDisinfectState function handles wait for
+ * disinfect state.
+ * @details Inputs: flushStartReqReceived, heatDisinfectStartReqReceived,
+ * chemDisinfectStartReqReceived, hasDisinfectCmdBeenSet
+ * @details Outputs: flushStartReqReceived, heatDisinfectStartReqReceived,
+ * chemDisinfectStartReqReceived, hasDisinfectCmdBeenSet, dgDisinfectState,
+ * currentStandbyState
+ * @return next state of the standby mode state machine
+ *************************************************************************/
+static HD_STANDBY_STATE_T handleStandbyModeWaitForDisinfectState( void )
+{
+    HD_STANDBY_STATE_T state = STANDBY_WAIT_FOR_DISINFECT_STATE;
+
+    if ( TRUE == flushStartReqReceived )
+    {
+        if ( FALSE == hasDisinfectCmdBeenSet )
+        {
+            cmdStartDGFlush();
+            hasDisinfectCmdBeenSet = TRUE;
+        }
+        else if ( DG_MODE_FLUS == getDGOpMode() )
+        {
+            hasDisinfectCmdBeenSet = FALSE;
+            dgDisinfectState = DG_DISINFECT_FLUSH_STATE;
+            currentStandbyState = STANDBY_DG_FLUSH_IN_PROGRESS_STATE;
+        }
+    }
+    else if ( TRUE == heatDisinfectStartReqReceived )
+    {
+        if ( FALSE == hasDisinfectCmdBeenSet )
+        {
+            cmdStartDGHeatDisinfect();
+            hasDisinfectCmdBeenSet = TRUE;
+        }
+        else if ( DG_MODE_HEAT == getDGOpMode() )
+        {
+            hasDisinfectCmdBeenSet = FALSE;
+            dgDisinfectState = DG_DISINFECT_HEAT_STATE;
+            currentStandbyState = STANDBY_DG_HEAT_DISINFECT_IN_PROGRESS_STATE;
+        }
+    }
+    else if ( TRUE == chemDisinfectStartReqReceived )
+    {
+        if ( FALSE == hasDisinfectCmdBeenSet )
+        {
+            cmdStartDGChemicalDisinfect();
+            hasDisinfectCmdBeenSet = TRUE;
+        }
+        else if ( DG_MODE_CHEM == getDGOpMode() )
+        {
+            hasDisinfectCmdBeenSet = FALSE;
+            dgDisinfectState = DG_DISINFECT_CHEM_STATE;
+            currentStandbyState = STANDBY_DG_CHEM_DISINFECT_IN_PROGRESS_STATE;
+        }
+    }
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleStandbyModeDGFlushInProgressState function handles DG flush
+ * in progress state.
+ * @details Inputs: none
+ * @details Outputs: dgDisinfectState, currentStandbyState
+ * @return next state of the standby mode state machine
+ *************************************************************************/
+static HD_STANDBY_STATE_T handleStandbyModeDGFlushInProgressState( void )
+{
+    HD_STANDBY_STATE_T state = STANDBY_DG_FLUSH_IN_PROGRESS_STATE;
+
+    if ( getDGOpMode() != DG_MODE_FLUS )
+    {
+        dgDisinfectState = DG_DISINFECT_NOT_RUNNING_STATE;
+        currentStandbyState = STANDBY_WAIT_FOR_TREATMENT_STATE;
+    }
+    publishDisinfectData();
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleStandbyModeDGHeatDisinfectInProgressState function handles DG
+ * heat disinfect in progress state.
+ * @details Inputs: none
+ * @details Outputs: dgDisinfectState, currentStandbyState
+ * @return next state of the standby mode state machine
+ *************************************************************************/
+static HD_STANDBY_STATE_T handleStandbyModeDGHeatDisinfectInProgressState( void )
+{
+    HD_STANDBY_STATE_T state = STANDBY_DG_HEAT_DISINFECT_IN_PROGRESS_STATE;
+
+    if ( getDGOpMode() != DG_MODE_HEAT )
+    {
+        dgDisinfectState = DG_DISINFECT_NOT_RUNNING_STATE;
+        currentStandbyState = STANDBY_WAIT_FOR_TREATMENT_STATE;
+    }
+    publishDisinfectData();
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleStandbyModeDGChemDisininfectInProgressState function handles
+ * DG chemical disinfect in progress state.
+ * @details Inputs: none
+ * @details Outputs: dgDisinfectState, currentStandbyState
+ * @return next state of the standby mode state machine
+ *************************************************************************/
+static HD_STANDBY_STATE_T handleStandbyModeDGChemDisininfectInProgressState( void )
+{
+    HD_STANDBY_STATE_T state = STANDBY_DG_CHEM_DISINFECT_IN_PROGRESS_STATE;
+
+    if ( getDGOpMode() != DG_MODE_CHEM )
+    {
+        dgDisinfectState = DG_DISINFECT_NOT_RUNNING_STATE;
+        currentStandbyState = STANDBY_WAIT_FOR_TREATMENT_STATE;
+    }
+    publishDisinfectData();
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The publishDisinfectData function publishes disinfects data at
+ * the set interval.
+ * @details Inputs: dataPublishCounter
+ * @details Outputs: dataPublishCounter
+ * @return: none
+ *************************************************************************/
+static void publishDisinfectData( void )
+{
+    if ( ++dataPublishCounter > DISINFECTS_DATA_PUB_INTERVAL )
+    {
+        DG_DISINFECT_UI_STATES_T state = getDGDisinfectsStates();
+        DISINFECTS_DATA_T data;
+
+        switch( currentStandbyState )
+        {
+            case STANDBY_DG_FLUSH_IN_PROGRESS_STATE:
+                data.disinfectDGState = state.flushUIState;
+                break;
+
+            case STANDBY_DG_HEAT_DISINFECT_IN_PROGRESS_STATE:
+                data.disinfectDGState = state.heatDisinfectUIState;
+                break;
+
+            case STANDBY_DG_CHEM_DISINFECT_IN_PROGRESS_STATE:
+                data.disinfectDGState = state.chemDisinfectUIState;
+                break;
+        }
+
+        data.disinfectSubModeHDState = (U32)dgDisinfectState;
+
+        broadcastDisinfectsData( &data );
+
+        dataPublishCounter = 0;
+    }
+}
+
 /**@}*/