script/tutorial/22_ScanCallbacks.js

@@ -0,0 +1,23 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Demonstrate use of scan callbacks to trigger a detector at falling edge.
+/////////////////////////////////////////////////////////////////////////////////////////////////// 
+
+
+function BeforeReadout(position){
+    ao1.write(1)
+    ao1.write(0)
+    //Example with an epics direct channel access
+    //caput("CHANNEL_NAME", 1)
+    //caput("CHANNEL_NAME", 0)    
+    print ("In position: " + position[0] + ", " + position[1])      
+}
+    
+
+
+
+function AfterReadout(record, scan){
+    print ("Aquired frame: " + record.index)
+}
+
+a= lscan([m1,m2], [ai1, ai2], [0,0], [4,8], steps=20, latency = 0.01, relative = undefined, 
+         passes = undefined, zigzag = undefined,before_read=BeforeReadout, after_read=AfterReadout)