Index: firmware/App/Modes/OperationModes.h
===================================================================
diff -u -r48ca7fd644c67920acc29a80b7af379d0a134d1a -r6d4aa77e6b85aa7621a234660f631e725fb1d441
--- firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision 48ca7fd644c67920acc29a80b7af379d0a134d1a)
+++ firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision 6d4aa77e6b85aa7621a234660f631e725fb1d441)
@@ -1,17 +1,17 @@
 /**************************************************************************
 *
-* Copyright (c) 2024-2024 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2024-2026 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    OperationModes.h
 *
-* @author  (last)      Vinayakam Mani
-* @date    (last)      05-Aug-2024
+* @author  (last)      Raghu Kallala
+* @date    (last)      06-Apr-2026
 *
 * @author  (original)  Vinayakam Mani
-* @date    (original)  05-Aug-2024
+* @date    (original)  07-Aug-2024
 *
 ***************************************************************************/
 
@@ -21,6 +21,7 @@
 #include "DDCommon.h"
 #include "DDDefs.h"
 #include "TDDefs.h"
+
 /**
  *  @defgroup DDOperationModes DDOperationModes
  *  @brief Operation Modes unit. Manages the top level operation modes of the DD via a state machine.
@@ -36,8 +37,8 @@
 /// Operation modes data structure
 typedef struct
 {
-    U32 currentMode;                        ///< Current Mode.
-    U32 currentSubMode;                     ///< Current Submode.
+    U32 opMode;                             ///< Operation Mode.
+    U32 subMode;                            ///< Submode.
 } OP_MODES_DATA_T;
 
 /// TD mode and TD submode
@@ -50,7 +51,7 @@
 // ********** public function prototypes **********
 
 void initOperationModes( void );                        // initialize this unit
-void execOperationModes( void );                        // execute the operation modes state machine (scheduled periodic call)
+void execDDOperationModes( void );                        // execute the operation modes state machine (scheduled periodic call)
 void requestNewOperationMode( DD_OP_MODE_T newMode );   // request a transition to a new operation mode
 DD_OP_MODE_T getCurrentOperationMode( void );           // get the current operation mode
 DD_OP_MODE_T getPreviousOperationMode( void );          // get the previous operation mode
@@ -62,6 +63,7 @@
 
 BOOL testSetOperationMode( MESSAGE_T *message );                    // Force transition to a given mode (if allowed)
 BOOL testDDOpModePublishIntervalOverride( MESSAGE_T *message );     // DD Opmode publish interval override
+BOOL testSetOperationSubMode( MESSAGE_T *message );                 // Set transition to operation sub mode (if valid)
 
 /**@}*/