■ ADT7410 디지털 온도 센서를 사용하는 방법을 보여준다.
▶ 부품 내역
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──────────────────── 구분 모델 수량 비고 ───────── ──── ── ── SENSOR/TEMPERATURE ADT7410 1 ──────────────────── |
[회로 구성도]
▶ MainPage.xaml
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<Page x:Class="TestApplication.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:TestApplication" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <TextBlock x:Name="textBlock" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="48" TextWrapping="Wrap" Text="TextBlock" /> </Grid> </Page> |
▶ MainPage.xaml.cs
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using System; using System.Diagnostics; using System.Threading; using Windows.Devices.Enumeration; using Windows.Devices.I2c; using Windows.Foundation; using Windows.UI.Xaml.Controls; namespace TestApplication { /// <summary> /// 메인 페이지 /// </summary> public sealed partial class MainPage : Page { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// I2C 장치 /// </summary> private I2cDevice i2cDevice; /// <summary> /// 타이머 /// </summary> private Timer timer; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainPage() /// <summary> /// 생성자 /// </summary> public MainPage() { InitializeComponent(); InitializeADT7410(); Unloaded += Page_Unloaded; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 페이지 언로드시 처리하기 - Page_Unloaded(sender, e) /// <summary> /// 페이지 언로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Page_Unloaded(object sender, object e) { if(this.i2cDevice != null) { this.i2cDevice.Dispose(); } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 온도 계산하기 - CalculateTemperature(highValue, lowValue) /// <summary> /// 온도 계산하기 /// </summary> /// <param name="highValue">상위 값</param> /// <param name="lowValue">하위 값</param> /// <returns>온도</returns> private static double CalculateTemperature(int highValue, int lowValue) { int value = (highValue << 5) + (lowValue >> 3); if(value > 4096) // 온도가 영하인 경우 { value = -1 * (8192 - value); } double temperature = value * 0.0625; return temperature; } #endregion #region 타이머 콜백 처리하기 - TimerCallback(state) /// <summary> /// 타이머 콜백 처리하기 /// </summary> /// <param name="state">상태</param> private void TimerCallback(object state) { string temperatureString; byte[] byteArray = new byte[2]; try { this.i2cDevice.Read(byteArray); } catch(Exception exception) { Debug.WriteLine("예외 : " + exception.Message); } int highValue = ((int)byteArray[0]); int lowValue = ((int)byteArray[1]); double temperature = CalculateTemperature(highValue, lowValue); Debug.WriteLine(temperature); temperatureString = String.Format("온도 : {0:F4} ℃", temperature); IAsyncAction task = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => { this.textBlock.Text = temperatureString; }); } #endregion #region ADT7410 초기화하기 - InitializeADT7410() /// <summary> /// ADT7410 초기화하기 /// </summary> private async void InitializeADT7410() { try { string advancedQuerySyntax = I2cDevice.GetDeviceSelector(); DeviceInformationCollection deviceInformationCollection = await DeviceInformation.FindAllAsync(advancedQuerySyntax); I2cConnectionSettings i2cConnectionSettings = new I2cConnectionSettings(0x48); i2cConnectionSettings.BusSpeed = I2cBusSpeed.FastMode; this.i2cDevice = await I2cDevice.FromIdAsync(deviceInformationCollection[0].Id, i2cConnectionSettings); } catch(Exception exception) { Debug.WriteLine("예외 : " + exception.Message); } this.timer = new Timer(TimerCallback, null, 0, 1000); } #endregion } } |
