Index: firmware/App/Modes/ModeFault.c
===================================================================
diff -u -r499e5de29e706d09f79ba22511068990c4044e84 -rbbf1e3736be03a4f041ace57e0f95e23caf472dd
--- firmware/App/Modes/ModeFault.c	(.../ModeFault.c)	(revision 499e5de29e706d09f79ba22511068990c4044e84)
+++ firmware/App/Modes/ModeFault.c	(.../ModeFault.c)	(revision bbf1e3736be03a4f041ace57e0f95e23caf472dd)
@@ -1,4 +1,4 @@
-/**************************************************************************
+/**********************************************************************//**
  *
  *  Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
  *
@@ -17,46 +17,81 @@
 #include "OperationModes.h"
 #include "ModeFault.h"
 
+/**
+ *  @addtogroup DGFaultMode
+ *  @{
+ */
+
+// ********** private definitions **********
+
 // ********** private data **********
 
+static DG_FAULT_STATE_T faultState = DG_FAULT_STATE_START;       ///< Currently active fault state.
+
 // ********** private function prototypes **********
 
-/*************************************************************************
- * @brief initFaultMode
+/*********************************************************************//**
+ * @brief
  * The initFaultMode function initializes the Fault Mode module.
  * @details
  * Inputs : none
  * Outputs : Fault Mode module initialized.
- * @param none
  * @return none
  *************************************************************************/
 void initFaultMode( void )
 {
+    faultState = DG_FAULT_STATE_START;
 }
 
-/*************************************************************************
- * @brief transitionToFaultMode
+/*********************************************************************//**
+ * @brief
  * The transitionToFaultMode function prepares for transition to fault mode.
  * @details
  * Inputs : none
  * Outputs :
- * @param none
  * @return none
  *************************************************************************/
 void transitionToFaultMode( void )
 {
 }
 
-/*************************************************************************
- * @brief execFaultMode
+/*********************************************************************//**
+ * @brief
  * The execFaultMode function executes the Fault Mode state machine.
  * @details
  * Inputs : none
  * Outputs :
- * @param none
- * @return none
+ * @return current state
  *************************************************************************/
-void execFaultMode( void )
+U32 execFaultMode( void )
 {
+    // execute current fault state
+    switch ( faultState )
+    {
+        case DG_FAULT_STATE_START:
+            break;
+
+        default:
+            // TODO - s/w fault
+            faultState = DG_FAULT_STATE_START;
+            break;
+    }
+
+    return faultState;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The getCurrentFaultState function returns the current state of the \n
+ * fault mode.
+ * @details
+ * Inputs : faultState
+ * Outputs : none
+ * @return the current state of fault mode.
+ *************************************************************************/
+DG_FAULT_STATE_T getCurrentFaultState( void )
+{
+    return faultState;
+}
+
+/**@}*/