Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -r6f02ff4686ec9dfc60247e9ed3fc9c5cc7771543 -r5a29e093e8a11f971c312cab5f6e7fedae2953db
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 6f02ff4686ec9dfc60247e9ed3fc9c5cc7771543)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 5a29e093e8a11f971c312cab5f6e7fedae2953db)
@@ -15,9 +15,14 @@
 *
 ***************************************************************************/
 
+#include "BloodFlow.h"
 #include "Buttons.h"
+#include "Messaging.h"
 #include "ModePreTreat.h"
 #include "OperationModes.h"
+#include "PeristalticPump.h"
+#include "TaskGeneral.h"
+#include "TDDefs.h"
 #include "Timers.h"
 #include "TxParams.h"
 
@@ -28,13 +33,27 @@
 
 // ********** private definitions **********
 
+///< Auto-Load timeout interval (ms/task time)
+#define AUTO_LOAD_TIMEOUT_INTERVAL          ( ( 10 * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL )
+
+//< Blood pump flow rate (mL/min) for Auto-Load operation
+#define AUTO_LOAD_BLOOD_FLOW_RATE_ML_MIN    100U
+
 // ********** private data **********
 
+static BOOL confirmTubesetPlaced;                                           ///< Flag indicating user has confirmed tubeset is placed
+static U32 autoLoadTimerCounter;                                            ///< Auto-Load operation timer counter
+static BOOL autoLoadHomePosCleared;                                         ///< Flag indicating blood pump rotor has left home position during auto-load
+
 static TD_PRE_TREATMENT_MODE_STATE_T currentPreTreatmentState;              ///< Current Pre-Treatment sub-state
+static PRE_TX_INSTALL_STATE_T currentPreTxInstallState;                     ///< Current Pre-Treatment Install sub-state
 
 // ********** private function prototypes **********
 
 static TD_PRE_TREATMENT_MODE_STATE_T handleRxState( void );                 ///< Handle Confirm Rx state during Pre-Treatment
+static TD_PRE_TREATMENT_MODE_STATE_T handleInstallState( void );            ///< Handle Install state during Pre-Treatment
+static PRE_TX_INSTALL_STATE_T handleAwaitTubesetConfirmationState( void );  ///< Handle Await Tubset Install Confirmation sub-state
+static PRE_TX_INSTALL_STATE_T handleAutoLoadState( void );                  ///< Handle Auto-Load sub-state
 
 /*********************************************************************//**
 * @brief
@@ -48,7 +67,11 @@
 {
     // Start a fresh Treatment Parameters session for this run.
     resetTreatmentParameters();
-    currentPreTreatmentState = TD_PRE_TREATMENT_CONFIRM_RX_STATE;
+    currentPreTreatmentState = TD_PRE_TREATMENT_TUBING_SET_INSTALL_STATE;
+    currentPreTxInstallState = PRE_TX_INSTALL_STATE_AWAIT_TUBING_SET_CONFIRMATION;
+    confirmTubesetPlaced = FALSE;
+    autoLoadTimerCounter = 0;
+    autoLoadHomePosCleared = FALSE;
 }
 
 /*********************************************************************//**
@@ -100,8 +123,8 @@
             // currentPreTreatmentState = handleSelfTestNoCartState();
             break;
 
-        case TD_PRE_TREATMENT_CART_INSTALL_STATE:
-            // currentPreTreatmentState = handleInstallState();
+        case TD_PRE_TREATMENT_TUBING_SET_INSTALL_STATE:
+            currentPreTreatmentState = handleInstallState();
             break;
 
         case TD_PRE_TREATMENT_SELF_TEST_DRY_STATE:
@@ -158,4 +181,132 @@
     return state;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handleInstallState function executes the Pre-Treatment Install
+ * state machine.
+ * @details Inputs: currentPreTxInstallState
+ * @details Outputs: Advances the Pre-Treatment Install sub-state and
+ * next Pre-Treatment top-level state when install is complete.
+ * @return current Pre-Treatment sub-state.
+ *************************************************************************/
+static TD_PRE_TREATMENT_MODE_STATE_T handleInstallState( void )
+{
+    TD_PRE_TREATMENT_MODE_STATE_T state = TD_PRE_TREATMENT_TUBING_SET_INSTALL_STATE;
+
+    switch(currentPreTxInstallState)
+    {
+        case PRE_TX_INSTALL_STATE_AWAIT_TUBING_SET_CONFIRMATION:
+            currentPreTxInstallState = handleAwaitTubesetConfirmationState();
+            break;
+
+        case PRE_TX_INSTALL_STATE_AUTO_LOAD:
+            currentPreTxInstallState = handleAutoLoadState();
+
+            if ( NUM_OF_PRE_TX_INSTALL_SUB_STATES == currentPreTxInstallState )
+            {
+                state = TD_PRE_TREATMENT_SELF_TEST_DRY_STATE;
+            }
+            break;
+
+        default:
+            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_SOFTWARE_FAULT, SW_FAULT_ID_MODE_PRE_TREATMENT_INVALID_STATE, (U32)currentPreTxInstallState );
+            break;
+    }
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleAwaitTubesetConfirmationState function handles the Await
+ * tubeset confirmation state of Pre-Treatement mode install state
+ * machine. Should wait for the user to confirm the tubeset is placed.
+ * @details Inputs: confirmTubsetPlaced
+ * @details Outputs: confirmTubsetPlaced, autoLoadHomePosCleared
+ * returns next Pre-Treatment install sub-state
+ *************************************************************************/
+static PRE_TX_INSTALL_STATE_T handleAwaitTubesetConfirmationState( void )
+{
+    PRE_TX_INSTALL_STATE_T subState = PRE_TX_INSTALL_STATE_AWAIT_TUBING_SET_CONFIRMATION;
+
+    if ( TRUE == confirmTubesetPlaced )
+    {
+        confirmTubesetPlaced = FALSE;
+        autoLoadHomePosCleared = FALSE;
+        subState = PRE_TX_INSTALL_STATE_AUTO_LOAD;
+    }
+
+    return subState;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleAutoLoadState function handles the Auto-Load state of
+ * Pre-Treatement mode install state.
+ * @details Inputs: autoLoadHomePosCleared, autoLoadTimerCounter
+ * @details Outputs: autoLoadHomePosCleared, autoLoadTimerCounter
+ * returns next Pre-Treatment install sub-state
+ *************************************************************************/
+static PRE_TX_INSTALL_STATE_T handleAutoLoadState( void )
+{
+    PRE_TX_INSTALL_STATE_T subState = PRE_TX_INSTALL_STATE_AUTO_LOAD;
+
+    // Set H4 to 100 mL/min forward
+    setBloodPumpTargetFlowRate( AUTO_LOAD_BLOOD_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+
+    // Timeout check
+    if ( ++autoLoadTimerCounter >= AUTO_LOAD_TIMEOUT_INTERVAL )
+    {
+        signalBloodPumpHardStop();
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_AUTO_LOAD_EJECT_BP_TIMEOUT, autoLoadHomePosCleared, isPeristalticPumpHome() );
+        requestNewOperationMode( MODE_FAUL );
+    }
+    else
+    {
+        if ( FALSE == autoLoadHomePosCleared )
+        {
+            if ( FALSE == isPeristalticPumpHome() )
+            {
+                autoLoadHomePosCleared = TRUE;
+            }
+        }
+        else if ( TRUE == isPeristalticPumpHome() )
+        {
+            signalBloodPumpHardStop();
+            subState = NUM_OF_PRE_TX_INSTALL_SUB_STATES;
+        }
+    }
+
+    return subState;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The signalUserConfirmTubesetInstallation function sets the user
+ * confirmation flag signaling user has confirmed tubset installation
+ * @details Inputs: none
+ * @details Outputs: confirmTubesetPlaced
+ * @param message confirmation message from UI which includes the user
+ * confirmation of tubset installation.
+ * @return TRUE if confirmation/rejection accepted, FALSE if not
+ *************************************************************************/
+BOOL signalUserConfirmTubesetInstallation( MESSAGE_T *message )
+{
+    BOOL confirmed = FALSE;
+    BOOL result = FALSE;
+
+    if ( sizeof( BOOL ) == message->hdr.payloadLen )
+    {
+        memcpy( &confirmed, message->payload, sizeof( BOOL ) );
+        if( TRUE == confirmed )
+        {
+            confirmTubesetPlaced = TRUE;
+            result = TRUE;
+        }
+    }
+
+    return result;
+}
+
 /**@}*/