在同一個COM端口上使用兩個串行端口 - WPF C＃

Question

我有一個地磅應用程序，在這裏我使用串行端口來獲取地磅的重量。

我需要採取權重兩次。一輛空載貨車，然後裝載卡車。我只是想知道我是否可以使用兩個串行端口，一個用於稱重空載貨車，另一個用於稱重已裝載的貨車？像

spWeighIn = new SerialPort("COM1", 2400, Parity.None, 8, StopBits.One); 
spWeighOut = new SerialPort("COM1", 2400, Parity.None, 8, StopBits.One); 

，並利用它們同時

感謝

這是我的代碼：

SerialPort spWeigh; 
    string strResponseWeigh; 

    private delegate void SetTextDeleg(string text); 

    public MainWindow() 
    { 
     InitializeComponent(); 
     this.Loaded += new RoutedEventHandler(MainWindow_Loaded); 
    } 

    void MainWindow_Loaded(object sender, RoutedEventArgs e) 
    { 
     spWeigh = new SerialPort("COM1", 2400, Parity.None, 8, StopBits.One); 
     spWeigh.RtsEnable = false; 
     spWeigh.DtrEnable = false; 
     spWeigh.Handshake = Handshake.None; 
     spWeigh.ReadTimeout = 10000; 
    } 

    private void button1_Click(object sender, RoutedEventArgs e) 
    { 
     if (!spWeigh.IsOpen) 
      spWeigh.Open(); 
     spWeigh.DataReceived += new SerialDataReceivedEventHandler(spWeigh_DataInReceived); 
     spWeigh.Write("W"); 
    } 

    void spWeigh_DataInReceived(object sender, SerialDataReceivedEventArgs e) 
    { 
     strResponseWeigh = spWeigh.ReadLine();   
     string wt = strResponseWeigh.Substring(5, 7); 
     this.TxtFrstWt.Dispatcher.BeginInvoke(new SetTextDeleg(sin_DataReceived), new object[] { wt }); 
    } 

    private void sin_DataReceived(string data) 
    { 
     TxtFrstWt.Text = data.Trim(); 
     TxtDateIn.Text = DateTime.Now.ToString("dd/MM/yyyy");   
    } 

    private void button2_Click(object sender, RoutedEventArgs e) 
    { 
     if (!spWeigh.IsOpen) 
      spWeigh.Open(); 
     spWeigh.DataReceived += new SerialDataReceivedEventHandler(spWeigh_DataOutReceived); 
     spWeigh.Write("W"); 
    } 

    void spWeigh_DataOutReceived(object sender, SerialDataReceivedEventArgs e) 
    { 
     strResponseWeigh = spWeigh.ReadLine();    
     string wt = strResponseWeigh.Substring(5, 7);    
     this.TxtFrstWt.Dispatcher.BeginInvoke(new SetTextDeleg(sout_DataReceived), new object[] { wt }); 
    } 
    private void sout_DataReceived(string data) 
    { 
     TxtScndryWt.Text = data.Trim(); 
     TxtDateOut.Text = DateTime.Now.ToString("dd/MM/yyyy"); 
    } 
} 

Answer 1

讓我看看我是否明白這一點。

你是說你有一個設備連接到串口，你需要從那裏讀取兩次信息，對吧？

你的代碼在處理時有點費神。我想重做它多一點這樣的：

SerialPort spWeigh; 
string strResponseWeigh; 

private delegate void SetTextDeleg(string text); 

public MainWindow() 
{ 
    InitializeComponent(); 
    this.Loaded += new RoutedEventHandler(MainWindow_Loaded); 
} 

void MainWindow_Loaded(object sender, RoutedEventArgs e) 
{ 
    spWeigh = new SerialPort("COM1", 2400, Parity.None, 8, StopBits.One); 
    spWeigh.RtsEnable = false; 
    spWeigh.DtrEnable = false; 
    spWeigh.Handshake = Handshake.None; 
    spWeigh.ReadTimeout = 10000; 
    spWeigh.DataReceived += spWeigh_DataInReceived; 
    spWeigh.Open(); 
} 

private void button1_Click(object sender, RoutedEventArgs e) 
{ 
    spWeigh.Write("W"); 
} 

void spWeigh_DataInReceived(object sender, SerialDataReceivedEventArgs e) 
{ 
    strResponseWeigh = spWeigh.ReadLine(); 
    string wt = strResponseWeigh.Substring(5, 7); 
    this.TxtFrstWt.Dispatcher.BeginInvoke(new SetTextDeleg(sin_DataReceived), new object[] { wt }); 
} 

private void sin_DataReceived(string data) 
{ 
    TxtFrstWt.Text = data.Trim(); 
    TxtDateIn.Text = DateTime.Now.ToString("dd/MM/yyyy"); 
} 

你看，你不需要每次都附加事件處理程序單擊該按鈕，這就是爲什麼行

spWeigh.DataReceived += spWeigh_DataInReceived; 

出現到MainWindow_Loaded事件處理程序。

嘗試多次打開一個串行連接可能會導致一些問題，這也會導致加載的事件處理程序。

如果我理解正確的過程中，每一個設備接收到的W通過串行接口時，它溢出了在秤的重量通過串口相同，對不對？

這樣您所需要做的就是當您單擊按鈕時發送'W'，並且結果應該出現在數據接收的事件處理程序中。

Answer 2

我不認爲去上班。爲什麼你甚至需要兩個連接到串行端口呢？

以任何方式從端口讀取重量並保存結果。 然後用加載的重複這一步。 計算差異，你就完成了。

爲什麼要使用SerialPort的兩個實例？這不像你必須將結果保存在這些對象中。