C＃讀Arduino

Question

我試圖做一個應用程序，讀取從Arduino傳出的信號，但我不能讓它在C＃Windows Forms，只在控制檯中工作。我的C＃Windows窗體代碼錯了嗎？我在調試時沒有遇到任何錯誤，但這並不意味着我沒有忘記一些東西。

這裏是我的代碼：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 
using System.IO.Ports; 
using System.Threading; 

namespace CommunicateWithArduino 
{ 
    public partial class Form1 : Form 
    { 
     public static System.IO.Ports.SerialPort port; 

     delegate void SetTextCallback(string text); 

     private BackgroundWorker hardWorker; 

     private Thread readThread = null; 


     public Form1() 
     { 
      InitializeComponent(); 

      hardWorker = new BackgroundWorker(); 
      sendBtn.Enabled = false; 
     } 

     private void btnConnect_Click(object sender, EventArgs e) 
     { 
      System.ComponentModel.IContainer components = 
       new System.ComponentModel.Container(); 
      port = new System.IO.Ports.SerialPort(components); 
      port.PortName = comPort.SelectedItem.ToString(); 
      port.BaudRate = Int32.Parse(baudRate.SelectedItem.ToString()); 
      port.DtrEnable = true; 
      port.ReadTimeout = 5000; 
      port.WriteTimeout = 500; 
      port.Open(); 

      readThread = new Thread(new ThreadStart(this.Read)); 
      readThread.Start(); 
      this.hardWorker.RunWorkerAsync(); 

      btnConnect.Text = "<Connected>"; 

      btnConnect.Enabled = false; 
      comPort.Enabled = false; 
      sendBtn.Enabled = true; 
     } 

     private void Form1_Load(object sender, EventArgs e) 
     { 
      foreach (string s in SerialPort.GetPortNames()) 
      { 
       comPort.Items.Add(s); 
      } 
      if (comPort.Items.Count > 0) 
       comPort.SelectedIndex = comPort.Items.Count-1; 
      else 
       comPort.SelectedIndex = 0; 

      baudRate.Items.Add("2400"); 
      baudRate.Items.Add("4800"); 
      baudRate.Items.Add("9600"); 
      baudRate.Items.Add("14400"); 
      baudRate.Items.Add("19200"); 
      baudRate.Items.Add("28800"); 
      baudRate.Items.Add("38400"); 
      baudRate.Items.Add("57600"); 
      baudRate.Items.Add("115200"); 

      baudRate.SelectedIndex = 2; 
     } 

     private void sendBtn_Click(object sender, EventArgs e) 
     { 
      if (port.IsOpen) 
      { 
       port.Write(sendText.Text); 
      } 
     } 

     private void SetText(string text) 
     { 

      if (this.receiveText.InvokeRequired) 
      { 
       SetTextCallback d = new SetTextCallback(SetText); 
       this.Invoke(d, new object[] { text }); 
      } 
      else 
      { 
       this.receiveText.Text += "Text: "; 
       this.receiveText.Text += text; 
       this.receiveText.Text += Environment.NewLine; 
      } 
     } 

     public void Read() 
     { 
      while (port.IsOpen) 
      { 
       try 
       { 
        if (port.BytesToRead > 0) 
        { 
         string message = port.ReadLine(); 
         this.SetText(message); 
        } 
       } 
       catch (TimeoutException) { } 
      } 
     } 

     private void Form1_FormClosed(object sender, FormClosedEventArgs e) 
     { 
      try 
      { 
       if(!(readThread == null)) 
        readThread.Abort(); 
      } 
      catch (NullReferenceException) 
      { 
      } 

      try 
      { 
       port.Close(); 
      } 
      catch (NullReferenceException) 
      { 
      } 
     } 
    } 
} 

Answer 1

默認情況下，ReadLine方法將阻塞，直到接收到一條線。你的Arduino程序是否發送一行？運行程序時你關閉了Arduino串口監視器程序嗎？

我會更改爲port.ReadChar，直到您確認您正在接收字符。