Merge pull request #21 from KurtE/gigabyte_keyboard

Fix/workaround for Gigabyte keyboard

keyboard.cpp

 	datapipe = new_Pipe(dev, 3, endpoint, 1, 8, interval);
 	datapipe->callback_function = callback;
 	queue_Data_Transfer(datapipe, report, 8, this);
-	mk_setup(setup, 0x21, 10, 0, 0, 0); // 10=SET_IDLE
+
+	mk_setup(setup, 0x21, 11, 0, 0, 0); // 11=SET_PROTOCOL  BOOT
 	queue_Control_Transfer(dev, &setup, NULL, this);
 	return true;
 }
 
 void KeyboardController::control(const Transfer_t *transfer)
 {
+	println("control callback (keyboard)");
+	print_hexbytes(transfer->buffer, transfer->length);
+	// To decode hex dump to human readable HID report summary:
+	//   http://eleccelerator.com/usbdescreqparser/
+	uint32_t mesg = transfer->setup.word1;
+	println("  mesg = ", mesg, HEX);
+	if (mesg == 0x001021 && transfer->length == 0) { // SET_PROTOCOL
+		mk_setup(setup, 0x21, 10, 0, 0, 0); // 10=SET_IDLE
+		queue_Control_Transfer(device, &setup, NULL, this);
+	}
 }
 
 void KeyboardController::callback(const Transfer_t *transfer)