Index: firmware/App/Modes/FPModes/FPModeStandby.c
===================================================================
diff -u -r830213bc6dcc1a684610caf78c79d55f2cb41e93 -r886964fa2bf6a5bb61b33b8b5547f3d0c585b360
--- firmware/App/Modes/FPModes/FPModeStandby.c	(.../FPModeStandby.c)	(revision 830213bc6dcc1a684610caf78c79d55f2cb41e93)
+++ firmware/App/Modes/FPModes/FPModeStandby.c	(.../FPModeStandby.c)	(revision 886964fa2bf6a5bb61b33b8b5547f3d0c585b360)
@@ -146,4 +146,56 @@
  *************************************************************************/
 
 
+/*********************************************************************//**
+ * @brief
+ * The testValidateStandbyChangeReq function validate whether
+ * requested sub mode change is legal or not.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @param newSubMode the enumerated sub state of the mode.
+ * @return TRUE if request is legal, FALSE if not.
+ *************************************************************************/
+BOOL testValidateStandbyChangeReq( U32 newSubMode )
+{
+    BOOL result = FALSE;
+
+    if ( newSubMode < NUM_OF_FP_STANDBY_MODE_STATES )
+    {
+        switch ( newSubMode )
+        {
+            case FP_STANDBY_MODE_STATE_IDLE:
+            default:
+                result = TRUE;
+                break;
+        }
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The testSignalNewStandbySubMode function requests transition
+ * to a new standby sub mode.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @param newSubMode the enumerated sub state of the mode.
+ * @return none
+ *************************************************************************/
+void testSignalNewStandbySubMode( U32 newSubMode )
+{
+    if ( newSubMode < NUM_OF_FP_STANDBY_MODE_STATES )
+    {
+        standbyState = (FP_STANDBY_MODE_STATE_T)newSubMode;
+        // handle the prerequisite if any
+        switch ( newSubMode )
+        {
+            // Any of these state require no special handling
+            case FP_STANDBY_MODE_STATE_IDLE:
+            default:
+                break;
+        }
+    }
+}
+
 /**@}*/