使用运行在Windows10 IoT核心上的raspberrypi从RTC模块获取日期和时间，并在Windows10 IoT仪表板上显示日期时间

using System;
using Windows.Devices.Rtc;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace RTCApp
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            ReadRTCTime();
        }

        private async void ReadRTCTime()
        {
            var settings = new RtcSettings
            {
                Id = RtcDevice.GetDefault().DeviceId,
                Register = 0x32, // DS3231 地址
                prescaler = 0x20, // 32768 Hz
            };

            var rtcDevice = await RtcDevice.FromIdAsync(settings.Id);
            if (rtcDevice != null)
            {
                var time = await rtcDevice.GetSystemTimeAsync(settings);
                DateTime datetime = new DateTime(
                    1900, 1, 1, 0, 0, 0, DateTimeKind.Utc);
                datetime += TimeSpan.FromTicks(time.UnixTime * TimeSpan.TicksPerSecond);
                DateTime localTime = datetime.ToLocalTime();
                TimeTextBlock.Text = localTime.ToString("yyyy-MM-dd HH:mm:ss");
            }
        }
    }
}