Index: firmware/App/Drivers/SafetyShutdown.c
===================================================================
diff -u -r6ce9326aeabf018e9c531163359f7283f9d60ae9 -r090cfb22a7c0b4738299c3fb411ca77aaba8d968
--- firmware/App/Drivers/SafetyShutdown.c	(.../SafetyShutdown.c)	(revision 6ce9326aeabf018e9c531163359f7283f9d60ae9)
+++ firmware/App/Drivers/SafetyShutdown.c	(.../SafetyShutdown.c)	(revision 090cfb22a7c0b4738299c3fb411ca77aaba8d968)
@@ -21,6 +21,7 @@
 #include "Messaging.h"
 #include "SafetyShutdown.h"
 #include "Timers.h"
+#include "PAL.h"
 
 /**
  *  @addtogroup SafetyShutdown
@@ -29,10 +30,6 @@
 
 // ********** private definitions **********
 
-#define SAFETY_SPI1_PORT_MASK       0x00000010                                      ///< Safety shutdown GPIO port mask (CS[4] - re-purposed as output GPIO).
-#define SET_SAFETY_SHUTDOWN()       {mibspiREG1->PC3 |= SAFETY_SPI1_PORT_MASK;}     ///< Set safety shutdown GPIO macro.
-#define CLR_SAFETY_SHUTDOWN()       {mibspiREG1->PC3 &= ~SAFETY_SPI1_PORT_MASK;}    ///< Clear safety shutdown GPIO macro.
-
 #define SAFETY_SHUTDOWN_POST_TIMEOUT_MS     500                                     ///< Safety shutdown POST test timeout (in ms).
 #define SAFETY_SHUTDOWN_RECOVERY_TIME_MS    500                                     ///< After safety shutdown POST test, wait this long (in ms) to recover before moving on.
 
@@ -60,9 +57,11 @@
 
 /*********************************************************************//**
  * @brief
- * The initSafetyShutdown function initializes the safety shutdown module.
- * @details Inputs: none
- * @details Outputs: safetyShutdownActivated, safetyShutdownOverrideResetState,
+ * The initSafetyShutdown function initializes the safety shutdown module.
+ * The safety shutdown module is to cut down the 24v DC supply to majority of actuators
+ * when system detects critical faulty conditions.
+ * @details \b Inputs: none
+ * @details \b Outputs: safetyShutdownActivated, safetyShutdownOverrideResetState,
  * safetyShutdownSelfTestState, safetyShutdownSelfTestStatus,
  * safetyShutdownSelfTestTimerCount
  * @return none
@@ -74,28 +73,28 @@
     safetyShutdownSelfTestState      = SAFETY_SHUTDOWN_SELF_TEST_STATE_START;
     safetyShutdownSelfTestStatus     = SELF_TEST_STATUS_IN_PROGRESS;
     safetyShutdownSelfTestTimerCount = 0;
-    CLR_SAFETY_SHUTDOWN();
+    clear_saftety_shutdown();
 }
 
 /*********************************************************************//**
  * @brief
  * The activateSafetyShutdown function activates the safety shutdown signal.
- * @details Inputs: none
- * @details Outputs: Safety shutdown signal output set to active state.
+ * @details \b Inputs: none
+ * @details \b Outputs: Safety shutdown signal output set to active state.
  * @return none
  *************************************************************************/
 void activateSafetyShutdown( void )
 {
-    SET_SAFETY_SHUTDOWN();
+    set_safety_shutdown();
     safetyShutdownActivated = TRUE;
 }
 
 /*********************************************************************//**
  * @brief
  * The isSafetyShutdownActivated function returns whether the safety shutdown
  * signal has been activated.
- * @details Inputs: none
- * @details Outputs: none
+ * @details \b Inputs: none
+ * @details \b Outputs: none
  * @return safetyShutdownActivated
  *************************************************************************/
 BOOL isSafetyShutdownActivated( void )
@@ -107,9 +106,12 @@
  * @brief
  * The execSafetyShutdownTest function executes the safety shutdown test.
  * This function should be called periodically until a pass or fail
- * result is returned.
- * @details Inputs: safetyShutdownSelfTestState
- * @details Outputs: safetyShutdownSelfTestState
+ * result is returned. This function primarily checks when safety shutdown
+ * activated/ deactivated, the corresponding voltage is seen or not.
+ * @details \b Inputs: safetyShutdownSelfTestState
+ * @details \b Outputs: safetyShutdownSelfTestState
+ * @details \b Alarms: ALARM_ID_DD_SAFETY_SHUTDOWN_POST_TEST_FAILED,
+ * SW_FAULT_ID_SAFETY_SHUTDOWN_INVALID_SELF_TEST_STATE
  * @return in progress, passed, or failed
  *************************************************************************/
 SELF_TEST_STATUS_T execSafetyShutdownTest( void )
@@ -133,11 +135,11 @@
 //                // Verify 24V is down when w.d. expired
 //                if ( ( v24 > MAX_24V_LEVEL_ON_SAFETY_SHUTDOWN ) || ( isolatedV24 > MAX_ISOLATED_24V_LEVEL_ON_SS_EXPIRED ) )
 //                {
-//                    SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_SAFETY_SHUTDOWN_POST_TEST_FAILED, 1.0, v24 );
+//                    SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DD_SAFETY_SHUTDOWN_POST_TEST_FAILED, 1.0, v24 );
 //                    safetyShutdownSelfTestStatus = SELF_TEST_STATUS_FAILED;
 //                }
                 safetyShutdownSelfTestTimerCount = getMSTimerCount();
-                CLR_SAFETY_SHUTDOWN();
+                clear_saftety_shutdown();
                 safetyShutdownActivated = FALSE;
                 safetyShutdownSelfTestState = SAFETY_SHUTDOWN_SELF_TEST_STATE_RECOVER;
             }
@@ -153,7 +155,7 @@
 //                if ( ( v24 < MIN_24V_LEVEL_ON_SAFETY_RECOVER ) || ( isolatedV24 < MAX_ISOLATED_24V_LEVEL_ON_SS_EXPIRED ) )
 //                {
 //                    // TODO - If issue persisted talk with systems why 24V does not recover fully.
-//                    SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_SAFETY_SHUTDOWN_POST_TEST_FAILED, 2.0, v24 );
+//                    SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DD_SAFETY_SHUTDOWN_POST_TEST_FAILED, 2.0, v24 );
 //                    safetyShutdownSelfTestStatus = SELF_TEST_STATUS_FAILED;
 //                }
 //                else
@@ -173,7 +175,7 @@
 
         default:
             result = SELF_TEST_STATUS_FAILED;
-            //SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_SAFETY_SHUTDOWN_INVALID_SELF_TEST_STATE, safetyShutdownSelfTestState )
+            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DD_SOFTWARE_FAULT, SW_FAULT_ID_SAFETY_SHUTDOWN_INVALID_SELF_TEST_STATE, safetyShutdownSelfTestState )
             break;
     }
 
@@ -183,8 +185,8 @@
 /*********************************************************************//**
  * @brief
  * The resetSafetyShutdownPOSTState function resets the safety shutdown POST state.
- * @details Inputs: none
- * @details Outputs: safetyShutdownSelfTestState
+ * @details \b Inputs: none
+ * @details \b Outputs: safetyShutdownSelfTestState
  * @return none
  *************************************************************************/
 void resetSafetyShutdownPOSTState( void )
@@ -195,8 +197,8 @@
 /*********************************************************************//**
  * @brief
  * The testSetSafetyShutdownOverride function overrides the HD safety shutdown.
- * @details Inputs: none
- * @details Outputs: HD safety shutdown overridden
+ * @details \b Inputs: none
+ * @details \b Outputs: HD safety shutdown overridden
  * @param value TRUE to activate safety shutdown, FALSE to de-activate it
  * @return TRUE if override successful, FALSE if not
  *************************************************************************/
@@ -216,7 +218,7 @@
         else
         {
             safetyShutdownActivated = FALSE;
-            CLR_SAFETY_SHUTDOWN();
+            clear_saftety_shutdown();
         }
         result = TRUE;
     }
@@ -228,8 +230,8 @@
  * @brief
  * The testResetSafetyShutdownOverride function resets the override of the
  * HD safety shutdown.
- * @details Inputs: none
- * @details Outputs: shutdown override reset
+ * @details \b Inputs: none
+ * @details \b Outputs: shutdown override reset
  * @return TRUE if override reset successful, FALSE if not
  *************************************************************************/
 BOOL testResetSafetyShutdownOverride( void )
@@ -245,7 +247,7 @@
         else
         {
             safetyShutdownActivated = FALSE;
-            CLR_SAFETY_SHUTDOWN();
+            clear_saftety_shutdown();
         }
         result = TRUE;
     }