Index: firmware/App/Modes/ModeSolo.c
===================================================================
diff -u -rfbf04988794f0eaa8a7a596a349bae1dfff0e079 -ra504d6899e709d7432af9c055db1bd1fe340d032
--- firmware/App/Modes/ModeSolo.c	(.../ModeSolo.c)	(revision fbf04988794f0eaa8a7a596a349bae1dfff0e079)
+++ firmware/App/Modes/ModeSolo.c	(.../ModeSolo.c)	(revision a504d6899e709d7432af9c055db1bd1fe340d032)
@@ -1,4 +1,4 @@
-/**************************************************************************
+/**********************************************************************//**
  *
  *  Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
  *
@@ -18,46 +18,82 @@
 #include "ModeSolo.h"
 #include "CPLD.h"
 
+/**
+ *  @addtogroup DGSoloStandbyMode
+ *  @{
+ */
+
+// ********** private definitions **********
+
 // ********** private data **********
 
+static DG_SOLO_STANDBY_STATE_T soloState = DG_SOLO_STANDBY_STATE_START;       ///< Currently active solo standby state.
+
 // ********** private function prototypes **********
 
-/*************************************************************************
+/*********************************************************************//**
  * @brief
  * The initSoloMode function initializes the Standby-Solo Mode module.
  * @details
  * Inputs : none
  * Outputs : Standby-Solo Mode module initialized.
- * @param none
  * @return none
  *************************************************************************/
 void initSoloMode( void )
 {
+    soloState = DG_SOLO_STANDBY_STATE_START;
 }
 
-/*************************************************************************
+/*********************************************************************//**
  * @brief
  * The transitionToSoloMode function prepares for transition to standby-solo mode.
  * @details
  * Inputs : none
  * Outputs :
- * @param none
  * @return none
  *************************************************************************/
 void transitionToSoloMode( void )
 {
+    initSoloMode();
 }
 
-/*************************************************************************
+/*********************************************************************//**
  * @brief
  * The execSoloMode function executes the Standby-Solo Mode state machine.
  * @details
  * Inputs : none
  * Outputs :
- * @param none
- * @return none
+ * @return current state.
  *************************************************************************/
-void execSoloMode( void )
+U32 execSoloMode( void )
 {
+    // execute current solo standby state
+    switch ( soloState )
+    {
+        case DG_SOLO_STANDBY_STATE_START:
+            break;
 
+        default:
+            // TODO - s/w fault
+            soloState = DG_SOLO_STANDBY_STATE_START;
+            break;
+    }
+
+    return soloState;
 }
+
+/*********************************************************************//**
+ * @brief
+ * The getCurrentSoloState function returns the current state of the \n
+ * standby-solo mode.
+ * @details
+ * Inputs : soloState
+ * Outputs : none
+ * @return the current state of standby-solo mode.
+ *************************************************************************/
+DG_SOLO_STANDBY_STATE_T getCurrentSoloState( void )
+{
+    return soloState;
+}
+
+/**@}*/