MIDI support in simulator (#1332)

* gluing to support MIDI devices in the simulator

* sim support for midi

* simplify interface

* ensure helper function does not show up in TS

* bump pxt

libs/core/control.cpp

@@ -302,4 +302,13 @@ namespace control {
     int deviceSerialNumber() {
         return microbit_serial_number();
     }
+
+    /**
+    * Informs simulator/runtime of a MIDI message
+    * Internal function to support the simulator.
+    */
+    //% part=midioutput block
+    void __midiSend(Buffer buffer) {
+        // this is a stub to support the simulator
+    }
 }

libs/core/shims.d.ts

@@ -431,6 +431,13 @@ declare namespace control {
     //% blockId="control_device_serial_number" block="device serial number" weight=9
     //% advanced=true shim=control::deviceSerialNumber
     function deviceSerialNumber(): int32;
+
+    /**
+     * Informs simulator/runtime of a MIDI message
+     * Internal function to support the simulator.
+     */
+    //% part=midioutput block shim=control::__midiSend
+    function __midiSend(buffer: Buffer): void;
 }
 
 

package.json

@@ -42,6 +42,6 @@
   },
   "dependencies": {
     "pxt-common-packages": "0.23.57",
-    "pxt-core": "4.1.12"
+    "pxt-core": "4.1.13"
   }
 }

sim/state/midi.ts

@@ -0,0 +1,7 @@
+namespace pxsim.control {
+    export function __midiSend(data: RefBuffer) {
+        const b = board();
+        pxsim.AudioContextManager.sendMidiMessageAsync(data)
+            .done();
+    }
+}