The Running Bug

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Devices.Gpio;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

//“空白页”项模板在 http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409 上有介绍

namespace SmartBug
{
    /// <summary>
    /// 可用于自身或导航至 Frame 内部的空白页。
    /// </summary>
    public sealed partial class MainPage : Page
    {
        private const int INFRARED_PIN = 4;
        private const int BUG_PIN = 5;
       
        private GpioPin pin_infrared;
        private GpioPin pin_bug;

        private GpioPinValue pinValue_infrared;
        private GpioPinValue pinValue_bug;

        private DispatcherTimer timer;
       
          public MainPage()
        {
            InitializeComponent();
            InitGPIO();
            
            while (true)
            {
                 pinValue_infrared = pin_infrared.Read();
                  if (pinValue_infrared == GpioPinValue.High)
                  {
                    pinValue_bug = GpioPinValue.High;
                    pin_bug.Write(pinValue_bug);
                   Task.Delay(20).Wait();

                    pinValue_bug = GpioPinValue.Low;
                    pin_bug.Write(pinValue_bug);

                }
                  else
                  {
                   
                    pinValue_bug = GpioPinValue.Low;
                    pin_bug.Write(pinValue_bug);
                }
            }
        }
       

        private void InitGPIO()
        {
            var gpio = GpioController.GetDefault();

            // Show an error if there is no GPIO controller
            if (gpio == null)
            {
                pin_infrared = null;
                pin_bug = null;
                return;
            }

            pin_infrared = gpio.OpenPin(INFRARED_PIN);
            pin_infrared.SetDriveMode(GpioPinDriveMode.Input);

            pin_bug = gpio.OpenPin(BUG_PIN);
            pinValue_bug = GpioPinValue.High;
            pin_bug.Write(pinValue_bug);
            pin_bug.SetDriveMode(GpioPinDriveMode.Output);

        }
    }
}