Fix reset.

Author: microbit-matt-hillsdon

src/board/index.ts

@@ -82,6 +82,10 @@ export class Board {
    * Defined during start().
    */
   private modulePromise: Promise<ModuleWrapper> | undefined;
+  /**
+   * Flag to trigger a reset after start finishes.
+   */
+  private resetWhenDone: boolean = false;
 
   constructor(
     private notifications: Notifications,
@@ -349,11 +353,17 @@ export class Board {
     if (panicCode !== undefined) {
       this.displayPanic(panicCode);
     } else {
-      this.displayStoppedState();
+      if (this.resetWhenDone) {
+        this.resetWhenDone = false;
+        setTimeout(() => this.start(), 0);
+      } else {
+        this.displayStoppedState();
+      }
     }
   }
 
-  async stop(): Promise<void> {
+  async stop(reset: boolean = false): Promise<void> {
+    this.resetWhenDone = reset;
     if (this.panicTimeout) {
       clearTimeout(this.panicTimeout);
       this.panicTimeout = null;
@@ -370,8 +380,7 @@ export class Board {
   }
 
   async reset(): Promise<void> {
-    await this.stop();
-    this.start();
+    this.stop(true);
   }
 
   async flash(filesystem: Record<string, Uint8Array>): Promise<void> {