Index: DDDefs.h
===================================================================
diff -u -r713db476bacaa86bd5cc37dc6d99dc26bda05c8e -r511aa7bc7e282a9b25586176219ed016f24fa48f
--- DDDefs.h	(.../DDDefs.h)	(revision 713db476bacaa86bd5cc37dc6d99dc26bda05c8e)
+++ DDDefs.h	(.../DDDefs.h)	(revision 511aa7bc7e282a9b25586176219ed016f24fa48f)
@@ -36,6 +36,7 @@
     DD_MODE_GEND,                       ///< Generate Dialysate mode
     DD_MODE_POSG,                       ///< Post Dialysate Generation mode
     DD_MODE_HEAT,                       ///< Heat Disinfect mode
+    DD_MODE_FLUS,                       ///< Flush mode
     DD_MODE_HCOL,                       ///< Heat Disinfect cooling mode
     DD_MODE_ROPS,                       ///< RO permeate sample mode
     DD_MODE_UPDT,                       ///< Update mode
@@ -293,11 +294,30 @@
 /// Enumeration of available DD commands.
 enum DD_Command
 {
-    DD_CMD_NONE = 0,                                ///< Not a command
-    NUM_OF_DD_COMMANDS                              ///< Number of DD commands
+    DD_CMD_NONE = 0,                               ///< Not a command
+    DD_CMD_START_DISINFECT_SKIP,                   ///< Command to skip disinfection
+    DD_CMD_START_DISINFECT_FLUSH,                  ///< Command to request DD to start flush
+    DD_CMD_START_DISINFECT_HEAT,                   ///< Command to request DD to start heat disinfection
+    DD_CMD_START_DISINFECT_HEAT_CITRIC,            ///< Command to request DD to start heat disinfection with citric
+    DD_CMD_START_DISINFECT_SUBSTITUTION_PORT,      ///< Command to request DD to start substitution port disinfection
+    DD_CMD_GOTO_POST_GENERATE,                     ///< Command to request DD to transition to Post-Generate mode
+    DD_CMD_GOTO_STANDBY,                           ///< Command to request DD to transition to Standby mode
+    NUM_OF_DD_COMMANDS                             ///< Number of DD commands
 };
-typedef enum DD_Command DD_COMMAND_T;               ///< Type for DD commands enumeration
+typedef enum DD_Command DD_COMMAND_T;              ///< Type for DD commands enumeration
 
+/// Enumeration of available disinfection selections.
+enum Disinfect_Selection
+{
+    DISINFECT_SEL_SKIP = 0,                        ///< Selection to skip disinfection
+    DISINFECT_SEL_FLUSH,                           ///< Selection for flush
+    DISINFECT_SEL_HEAT,                            ///< Selection for heat disinfection
+    DISINFECT_SEL_HEAT_CITRIC,                     ///< Selection for heat disinfection with citric
+    DISINFECT_SEL_SUBSTITUTION_PORT,               ///< Selection for substitution port disinfection
+    NUM_OF_DISINFECT_SELECTIONS                    ///< Number of disinfection selections
+};
+typedef enum Disinfect_Selection DISINFECT_SELECTION_T; ///< Type for disinfection selection enumeration
+
 /// Enumeration of general commands to DD sub-system.
 enum DD_General_Commands
 {
Index: MsgDefs.h
===================================================================
diff -u -r88fc3de16df381af2aea7981fc542703843f4e06 -r511aa7bc7e282a9b25586176219ed016f24fa48f
--- MsgDefs.h	(.../MsgDefs.h)	(revision 88fc3de16df381af2aea7981fc542703843f4e06)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 511aa7bc7e282a9b25586176219ed016f24fa48f)
@@ -266,6 +266,7 @@
     MSG_ID_DD_NVM_SET_CAL_BLOOD_LEAK_SENSOR_RESPONSE = 0x128,                        ///< DD NVM Set Blood Leak Sensor Calibration Record Response.
     MSG_ID_TD_DD_REQUEST_SERVICE_RECORD_FROM_TD = 0x129,                             ///< TD request for DD service record information.
     MSG_ID_TD_DD_USAGE_INFO_REQUEST = 0x12A,                                         ///< TD request for DD usage information.
+    MSG_ID_TD_DD_COMMAND_REQUEST = 0x12B,                                            ///< TD command request to DD.
 
     // service/test CAN messages
     MSG_ID_FIRST_TD_TESTER_MESSAGE = 0x8000,                                        ///< First TD test message ID