Adds support for 4 channel boxes and overview in Readme

db/counterbox_4ch.db

@@ -0,0 +1,46 @@
+# Counterbox EPICS Database
+# Macros
+# P - Prefix
+# NAME - just a name, e.g. EL737
+# PROTO - Stream device protocol file
+# ASYN_PORT - Low level Asyn IP Port to EL737
+
+################################################################################
+# Status Variables
+
+record(longin, "$(P):$(NAME):MONITOR-CHANNEL")
+{
+ field(DESC, "PRESET-COUNT Monitors this channel")
+ field(VAL, 1)
+ field(DISP, 1)
+}
+
+record(longin, "$(P):$(NAME):MONITOR-CHANNEL_RBV")
+{
+ field(DESC, "PRESET-COUNT Monitors this channel")
+ field(VAL, 1)
+ field(DISP, 1)
+}
+
+################################################################################
+# Count Commands
+
+record(longout,"$(P):$(NAME):THRESHOLD-MONITOR")
+{
+ field(DESC, "Channel monitored for minimum rate")
+ field(VAL, "1") # Monitor
+ field(DRVL, "1") # Smallest Threshold Channel
+ field(DRVL, "4") # Largest Threshold Channel
+}
+
+################################################################################
+# Read all monitors values
+
+record(ai, "$(P):$(NAME):READALL")
+{
+ field(DESC, "Reads monitors and elapsed time")
+ field(INP, "@$(PROTO) readAll4($(P):$(NAME):) $(ASYN_PORT)")
+ field(SCAN, ".2 second")
+ field(DTYP, "stream")
+ field(FLNK, "$(P):$(NAME):UNSET-COUNTING")
+}