在同一个COM端口上使用两个串行端口 - WPF C＃

Question

我有一个地磅应用程序，在这里我使用串行端口来获取地磅的重量。

我需要采取权重两次。一辆空载货车，然后装载卡车。我只是想知道我是否可以使用两个串行端口，一个用于称重空载货车，另一个用于称重已装载的货车？像

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

，并利用它们同时

感谢

这是我的代码：

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

让我看看我是否明白这一点。

你是说你有一个设备连接到串口，你需要从那里读取两次信息，对吧？

你的代码在处理时有点费神。我想重做它多一点这样的：

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处理程序单击该按钮，这就是为什么行

spWeigh.DataReceived += spWeigh_DataInReceived; 

出现到MainWindow_Loaded事件处理程序。

尝试多次打开一个串行连接可能会导致一些问题，这也会导致加载的事件处理程序。

如果我理解正确的过程中，每一个设备接收到的W通过串行接口时，它溢出了在秤的重量通过串口相同，对不对？

这样您所需要做的就是当您单击按钮时发送'W'，并且结果应该出现在数据接收的事件处理程序中。

Answer 2

我不认为去上班。为什么你甚至需要两个连接到串行端口呢？

以任何方式从端口读取重量并保存结果。 然后用加载的重复这一步。 计算差异，你就完成了。

为什么要使用SerialPort的两个实例？这不像你必须将结果保存在这些对象中。