script/tutorial/25_PseudoDevices.js

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+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Using pseudo-device to : 
+//    - Add calculations to scan data.
+//    - Execute logic during scan
+/////////////////////////////////////////////////////////////////////////////////////////////////// 
+      
+var Clock = Java.extend(Readable)
+var clock = new Clock() {	    
+        read: function (value) {
+        	return Date.now()
+        },
+    }
+set_device_alias(clock, "Clock")    
+
+var PseudoSensor = Java.extend(Readable)
+var averager = new PseudoSensor() {	    
+        read: function (value) {
+            arr = wf1.take()  //Gets the CACHED waveform
+            arr = to_array(arr) //Converts to a javascript array
+            return  arr.reduce(function(a, b) { return a + b; }) / arr.length
+        },
+    }    
+set_device_alias(averager, "Averager")        
+
+var PseudoPositioner = Java.extend(Writable)
+var positioner = new PseudoPositioner() {	    
+        write: function (value) {
+        	print ("Step = " + value)
+        },
+    }
+set_device_alias(positioner, "Positioner")            
+
+
+a= lscan([ao1,positioner],[ai2,wf1,averager,clock],[0,0],[40,20],20,0.1)
+
+