Index: firmware/App/Services/DDInterface.h
===================================================================
diff -u -rda59fa4a98dbc11c37677e92a66aa940d251678f -r222b05e39082f727dcfa2d144fa6e040501882f0
--- firmware/App/Services/DDInterface.h	(.../DDInterface.h)	(revision da59fa4a98dbc11c37677e92a66aa940d251678f)
+++ firmware/App/Services/DDInterface.h	(.../DDInterface.h)	(revision 222b05e39082f727dcfa2d144fa6e040501882f0)
@@ -14,23 +14,23 @@
 * @date    (original)  01-Aug-2024
 *
 ***************************************************************************/
-
-#ifndef __DD_INTERFACE_H__
-#define __DD_INTERFACE_H__
-
+
+#ifndef __DD_INTERFACE_H__
+#define __DD_INTERFACE_H__
+
 #include "TDCommon.h"
 #include "TDDefs.h"
-#include "DDDefs.h"
-
-/**
- *  @defgroup DDInterface DDInterface
- *  @brief DD interface & monitor unit.  Interfaces with and monitors the
- *  DD (dialysate delivery) sub-system.
- *
- *  @addtogroup DDInterface
- *  @{
- */
-
+#include "DDDefs.h"
+
+/**
+ *  @defgroup DDInterface DDInterface
+ *  @brief DD interface & monitor unit.  Interfaces with and monitors the
+ *  DD (dialysate delivery) sub-system.
+ *
+ *  @addtogroup DDInterface
+ *  @{
+ */
+
 // ********** public definitions **********
 
 /// DD command response data record structure.
@@ -41,32 +41,45 @@
     U32 rejectCode;                                                          ///< Reason code for rejecting the command
 } DD_CMD_RESPONSE_T;
 
-// ********** public function prototypes **********
-
+/// DD ultrafiltration broadcast data (matches DD UF_DATA_T layout).
+typedef struct
+{
+    U32 ufExecState;                                                        ///< Ultrafiltration execution state
+    F32 ufRate;                                                             ///< Ultrafiltration rate from TD
+    F32 compUFrate;                                                         ///< Compensated UF rate
+    U32 isUFRequested;                                                      ///< Ultrafiltration run or pause request
+    F32 ufVolumeDeliveredMl;                                                ///< UF volume delivered in mL
+} DD_UF_DATA_T;
+
+// ********** public function prototypes **********
+
 void initDDInterface( void );
 void resetDDInterface( void );
 
 void execDDInterfaceMonitor( void );
 
 DD_OP_MODE_T getDDOpMode( void );
-U32  getDDSubMode( void );
+U32  getDDSubMode( void );
 F32  getDialysatePressure( void );
 BOOL getDialysateGoodToDeliverStatus( void );
+F32  getDDUFVolumeDeliveredLiters( void );
 
 BOOL setDDOpMode( MESSAGE_T *message );
 BOOL setDialysateData( MESSAGE_T *message );
+BOOL setUFData( MESSAGE_T *message );
 BOOL setDialysatePressure( MESSAGE_T *message );
 
 void cmdStartPreGenerateDialysate( F32 qd, F32 dialTemp, F32 acidConvFactor, F32 bicarbConvFactor, U32 sodium, U32 bicarbonate );
-void cmdStartGenerateDialysate( F32 qd, F32 quf, F32 dialTemp, BOOL bypass, F32 acidConvFactor, F32 bicarbConvFactor, U32 sodium, U32 bicarbonate );
+void cmdStartGenerateDialysate( F32 qd, F32 quf, F32 dialTemp, U32 genDialysateState, F32 acidConvFactor, F32 bicarbConvFactor, U32 sodium, U32 bicarbonate );
 void cmdChangeQd( F32 qd );
 void cmdChangeQuf( F32 quf );
+void cmdSetGenDialysateState( U32 genDialysateState );
 void cmdBypassDialyzer( BOOL bypass );
-void cmdStopGenerateDialysate( void );
+void cmdStopGenerateDialysate( void );
 
 void handleDDCommandResponse( DD_CMD_RESPONSE_T *ddCmdRespPtr );
 BOOL getDDCommandResponse( U32 commandID, DD_CMD_RESPONSE_T *cmdRespPtr );
 
-/**@}*/
-
-#endif
+/**@}*/
+
+#endif