Add missing control stuff

libs/microbit/control.cpp

@@ -157,7 +157,6 @@ namespace control {
     //% weight=20 blockGap=8 blockId="control_on_event" block="on event|from %src=control_event_source|with value %value=control_event_value" 
     //% blockExternalInputs=1 blockStatement=1
     void onEvent(int src, int value, Action handler) { 
-        // not exposed yet
-        // bitvm::registerWithDal(src, value, handler);
+        registerWithDal(src, value, handler);
     }
 }

sim/libmbit.ts

@@ -221,6 +221,15 @@ namespace ks.rt.control {
     export function reset() {
         U.userError("reset not implemented in simulator yet")
     }
+
+    export function onEvent(id: number, evid: number, handler: RefAction) {
+        kindscript.registerWithDal(id, evid, handler)
+    }
+
+    export function raiseEvent(id: number, evid: number, mode: number) {
+        // TODO mode?
+        board().bus.queue(id, evid)
+    }
 }
 
 namespace ks.rt.kindscript {