Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r72bc0d5f33dbb07afc8a7cd9015e4861c6c371a1 -r4aa103de34d50b66f86368da36412afcd45db49e
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 72bc0d5f33dbb07afc8a7cd9015e4861c6c371a1)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 4aa103de34d50b66f86368da36412afcd45db49e)
@@ -7,8 +7,8 @@
 *
 * @file    Messaging.c
 *
-* @author  (last)      Jashwant Gantyada
-* @date    (last)      22-Mar-2026
+* @author  (last)      Raghu Kallala
+* @date    (last)      06-Apr-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -108,8 +108,6 @@
     { MSG_ID_DD_OP_MODE_DATA,                                           &setDDOpMode },
     { MSG_ID_DD_PRESSURES_DATA,                                         &setDialysatePressure },
     { MSG_ID_UI_TREATMENT_PARAMS_TO_VALIDATE,                           &validateAndSetTreatmentParameters },
-    { MSG_ID_UI_ULTRAFILTRATION_VOLUME_TO_VALIDATE,                     &validateAndSetUFVolume },
-    { MSG_ID_UI_TREATMENT_PARAMS_CONFIRMED,                             &signalUserConfirmationOfTreatmentParameters },
     { MSG_ID_UI_INITIATE_TREATMENT_WORKFLOW,                            &signalUserInitiateTreatment },
     { MSG_ID_UI_UF_PAUSE_RESUME_REQUEST,                                &signalPauseResumeUF },
     { MSG_ID_TESTER_LOGIN_REQUEST,                                      &handleTesterLogInRequest },
@@ -185,6 +183,7 @@
     { MSG_ID_TD_BLOOD_PRIME_VOLUME_OVERRIDE,                            &testBloodPrimeVolumeOverride },
     { MSG_ID_TD_BLOOD_PRIME_PUBLISH_INTERVAL_OVERRIDE_REQUEST,          &testBloodPrimePublishIntervalOverride },
     { MSG_ID_TD_ENABLE_VENOUS_BUBBLE_ALARM,                             &testEnableVenousBubbleAlarm },
+    { MSG_ID_FFU_SIGNAL_TD_UPDATE_AVAILABLE,                            &handleUpdateAvailable },
 };
 
 #define NUM_OF_FUNCTION_HANDLERS (sizeof(MSG_FUNCTION_HANDLER_LOOKUP) / sizeof(MSG_HANDLER_LOOKUP_T))
@@ -598,6 +597,18 @@
 
 /*********************************************************************//**
  * @brief
+ * The resetMicroControllerUnit function resets the MCU.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @return none
+ *************************************************************************/
+void resetMicroControllerUnit( void )
+{
+    setSystemREG1_SYSECR( (0x2) << 14 );  // Reset processor
+}
+
+/*********************************************************************//**
+ * @brief
  * The sendTestAckResponseMsg function constructs a simple response message
  * for a handled test message and queues it for transmit on the TD=>PC CAN
  * channel.
@@ -666,6 +677,32 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleUpdateAvailable function handles a request from the
+ * Firmware FPGA Updater (FFU) to reset the TD firmware processor.
+ * @note If reset is successful, this function will not return.
+ * @details \b Inputs: none
+ * @details \b Outputs: TD processor soft reset if request is valid
+ * @param message Pointer to the reset request message
+ * @return FALSE if reset command rejected
+ *************************************************************************/
+BOOL handleUpdateAvailable( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
+
+    // Verify payload length
+    if ( 0 == message->hdr.payloadLen )
+    {   // S/w reset of processor
+        result = TRUE;                        // Reset will prevent this from getting transmitted though
+        requestNewOperationMode( MODE_UPDT );
+    }
+
+    sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_TD_2_UI, result );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
  * The testTDSoftwareResetRequest function handles a request to reset the
  * TD firmware processor.
  * @note If reset is successful, this function will not return.
@@ -682,7 +719,7 @@
     if ( 0 == message->hdr.payloadLen )
     {   // S/w reset of processor
         result = TRUE;                        // Reset will prevent this from getting transmitted though
-        setSystemREG1_SYSECR( (0x2) << 14 );  // Reset processor
+        resetMicroControllerUnit();
     }
 
     sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );