Index: firmware/App/DDCommon.h
===================================================================
diff -u -re80046f4a55f5401c8959ab1c0a632f81e354757 -r8dd5ee9130303e0823f5063fab0d2997c93acc90
--- firmware/App/DDCommon.h	(.../DDCommon.h)	(revision e80046f4a55f5401c8959ab1c0a632f81e354757)
+++ firmware/App/DDCommon.h	(.../DDCommon.h)	(revision 8dd5ee9130303e0823f5063fab0d2997c93acc90)
@@ -54,6 +54,12 @@
 //Uncomment below once characterization/study completed
 //#define ENABLE_ALARM_2
 
+//Uncomment below for spent chamber filling
+#define __SPENT_CHAMBER_FILL__    1
+
+//Uncomment below for bicarb chamber filling
+//#define __BICARB_CHAMBER_FILL__   1
+
 //Uncomment below if balancing chamber pressure alarm is required
 //#define __BC_PRESSURE_ALARM__     1