Index: firmware/App/Modes/ModePreGenDialysate.c
===================================================================
diff -u -r0452674a0f7a356ab65d147d8222b6efabfd0bf7 -re9d780d77db564793278dac7dc613354f7b93049
--- firmware/App/Modes/ModePreGenDialysate.c	(.../ModePreGenDialysate.c)	(revision 0452674a0f7a356ab65d147d8222b6efabfd0bf7)
+++ firmware/App/Modes/ModePreGenDialysate.c	(.../ModePreGenDialysate.c)	(revision e9d780d77db564793278dac7dc613354f7b93049)
@@ -46,16 +46,16 @@
 #define PRE_GEN_DIALYSATE_DATA_PUB_INTERVAL                 ( MS_PER_SECOND / TASK_GENERAL_INTERVAL )       ///< Interval (ms/task time) at which the pre-gen dialysate mode data published.
 #define HYD_CHAMBER_PRES_CHECK_TIME_OUT                     ( 30 * MS_PER_SECOND )                          ///< Time out period when hydraulics chamber pressure check initiated
 #define NEG_PRES_PERSISTENCE_TIME_MS                        ( 1 * MS_PER_SECOND )                           ///< Persistence time for Hydraulics chamber negative degassing pressure check.
-#define PRE_GEN_DEFAULT_TIME_OUT                            ( 60 * MS_PER_SECOND )
-#define PRE_GEN_FILL_HYDRO_CHAMBER_TIMEOUT                  ( 60 * MS_PER_SECOND )
-#define PRE_GEN_FILL_HYDRO_CHAMBER_STABILITY_TIMER          ( 10 * MS_PER_SECOND )
-#define PRE_GEN_PRIME_CONCENTRATE_TIMEOUT                   ( 30 * MS_PER_SECOND )
-#define PRE_GEN_PRIME_CONCENTRATE_PUMP_SPEED                100.0F
-#define PRE_GEN_PRIME_CONCENTRATE_VOLUME                    0xFFFF
-#define PRE_GEN_PRIME_BAL_CHAMBER_CONCENTRATE_PUMP_SPEED    60.0F
-#define PRE_GEN_PRIME_D12_RPM                               1600.0F
-#define PRE_GEN_PRIME_D48_RPM                               2000.0F
-#define PRE_GEN_PRIME_DIALYZER_CONCENTRATE_PUMP_SPEED       30.0F
+#define PRE_GEN_DEFAULT_TIME_OUT                            ( 60 * MS_PER_SECOND )                          ///< Pre Generate Default timeout for various states in ms.
+#define PRE_GEN_FILL_HYDRO_CHAMBER_TIMEOUT                  ( 60 * MS_PER_SECOND )                          ///< Pre Generate Hydro Chamber timeout in ms
+#define PRE_GEN_FILL_HYDRO_CHAMBER_STABILITY_TIMER          ( 10 * MS_PER_SECOND )                          ///< Pre Generate Hydro Chamber stability timer
+#define PRE_GEN_PRIME_CONCENTRATE_TIMEOUT                   ( 30 * MS_PER_SECOND )                          ///< Pre Generate concentrate line priming timer.
+#define PRE_GEN_PRIME_CONCENTRATE_PUMP_SPEED                100.0F                                          ///< Concentrate line priming speed.
+#define PRE_GEN_PRIME_CONCENTRATE_VOLUME                    0xFFFF                                          ///< Concentrate line volume. FFFF = no set volume.
+#define PRE_GEN_PRIME_BAL_CHAMBER_CONCENTRATE_PUMP_SPEED    60.0F                                           ///< Concentrate line speed for balancing chamber switching.
+#define PRE_GEN_PRIME_D12_RPM                               1600.0F                                         ///< Pre Generate D12 set RPM.
+#define PRE_GEN_PRIME_D48_RPM                               2000.0F                                         ///< Pre Generate D48 set rpm.
+#define PRE_GEN_PRIME_DIALYZER_CONCENTRATE_PUMP_SPEED       30.0F                                           ///< Pre Generate prime dialyzer concentate pump speed.
 
 // ********** private data **********
 
@@ -67,11 +67,11 @@
 static BOOL pendingStopDDPreGenDialRequest;                                                                 ///< Flag indicating TD has requested DD stop the pre generation dialysate.
 static U32 preGenDialysatePublishTimerCounter;                                                              ///< Pre-Gen Dialysate data broadcast timer counter used to schedule when to transmit data.
 static OVERRIDE_U32_T preGenDialysateModePublishInterval;                                                   ///< Interval (in task intervals) at which to publish pre-gen dialysate mode data to CAN bus.
-static U32 preGenAcidPrimeTimer;
-static U32 preGenBicarbPrimeTimer;
-static U32 preGenfillChamberCTimer;
-static BOOL currentHydroChamberStatus;
-static U32 startPreGenHydroStabilityTimer;
+static U32 preGenAcidPrimeTimer;                                                                            ///< Acid priming timer counter.
+static U32 preGenBicarbPrimeTimer;                                                                          ///< Bicarb priming timer counter.
+static U32 preGenfillChamberCTimer;                                                                         ///< Hydro chamber timer counter.
+static BOOL currentHydroChamberStatus;                                                                      ///< Current hydro chamber status.
+static U32 startPreGenHydroStabilityTimer;                                                                  ///< Hydro Chamber stability timer.
 
 // ********** private function prototypes **********
 
@@ -151,8 +151,6 @@
 {
     DD_PRE_GEN_DIALYSATE_STATE_T prevState = preGenDialysateState;
 
-
-
     if ( TRUE == getTestConfigStatus( TEST_CONFIG_DD_SKIP_PRE_GEN_PRIMING ) )
     {
         preGenDialysateState  = DD_PRE_GEN_DIALYSATE_WAIT_FOR_GEND;
@@ -421,6 +419,14 @@
     return state;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handlePrimeAcidLine function handles priming the acid line
+ *  and transition to next state.
+ * @details \b Inputs: state
+ * @details \b Outputs: none
+ * @return current state of PreGenDialysate mode
+ *************************************************************************/
 static DD_PRE_GEN_DIALYSATE_STATE_T handlePrimeAcidLine( void )
 {
     DD_PRE_GEN_DIALYSATE_STATE_T state  = DD_PRE_GEN_PRIME_ACID_LINE;