请问C#读写串口的方法

2009-08-24 01:05:34 623 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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SurfaceControlViewHost使用介绍可以看到，主要用途：是把一个进程的View显示到另外一个进程里面。阅读详情

有源码更好，谢谢大家

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切换为时间正序

jxn00700800907 2012-08-14

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看看一楼的

jlsundawei 2011-11-26

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不错，两段程序都很好。

cloudbody 2011-09-25

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同样需要啊，谢谢啦

小竹林2014 2009-08-25

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谢谢学习了

qqiuzaihui 2009-08-25

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UP, JF.

austo 2009-08-25

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很好，呵呵

michaelnami 2009-08-24

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1楼已经很全了

jhdxhj 2009-08-24

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ding

threenewbee 2009-08-24

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//程序开启，串口初始化

  private void Form1_Load(object sender, System.EventArgs e)

  {

   mycom1.PortNum=iPort;

   mycom1.BaudRate=iRate;

   mycom1.ByteSize=bSize;

   mycom1.Parity=bParity;

   mycom1.StopBits=bStopBits;

   mycom1.ReadTimeout=iTimeout;

   if(this.OpenCom())

    msg.AppendText("串口初始化成功……\r\n");

   else

    msg.AppendText("串口初始化失败！\r\n");

  }

//显示包信息

  public string dis_package(byte[] reb)

  {

   string temp="";

   foreach(byte b in reb)

    temp+=b.ToString("X2")+" ";

   return temp;

  }

//开串口

  public bool OpenCom()

  {

   try

   {

　    if (mycom1.Opened)

　    {

　　    mycom1.Close();

　　    mycom1.Open(); //打开串口

　    }

　    else

　    {

　　    mycom1.Open();//打开串口

　    }

　    return true;

   }

   catch(Exception e) 

   {

　    MessageBox.Show("错误：" + e.Message);

　    return false;

   } 



  }

//发送按钮

  private void button1_Click(object sender, System.EventArgs e)

  {

   if(t_send.Text=="")

   {MessageBox.Show("发送数据为空！");return;}

   byte[] temp1=mysendb();

   int sendnumb=0;

   try

   {

    sendnumb=mycom1.Write(temp1);

     msg.AppendText("\r\n发送数据("+sendnumb+")："+dis_package(temp1));

    recb=mycom1.Read(50);

    //if(recb.Length!=0)

     msg.AppendText("\r\n接收到数据包："+dis_package(recb));

   }

   catch

   {msg.AppendText("\r\n发送失败！");return;}

   

   //OpenCom();

  }

//去掉发送数组中的空格

  public string delspace(string putin)

  {

   string putout="";

   for(int i=0;i<putin.Length;i++)

   {

    if(putin[i]!=' ')

     putout+=putin[i];

   }

   return putout;

  }

//提取数据包

  public byte[] mysendb()

  {

   string temps=delspace(t_send.Text);

   byte[] tempb=new byte[50];

   int j=0;

   for(int i=0;i<temps.Length;i=i+2,j++)

    tempb[j]=Convert.ToByte(temps.Substring(i,2),16);

   byte[] send=new byte[j];

   Array.Copy(tempb,send,j);

   return send;

  }

//清空按钮

  private void button3_Click(object sender, System.EventArgs e)

  {

   t_send.Text=string.Empty;

   msg.Text=string.Empty;

  }



//参数设置

  private void button2_Click(object sender, System.EventArgs e)

  {

    mycom1.PortNum=Convert.ToInt16(t_port.Text); //1,2,3,4

   mycom1.BaudRate=Convert.ToInt16(t_rate.Text); //1200,2400,4800,9600

   mycom1.ByteSize=Convert.ToByte(t_bytesize.Text,10); //8 bits

   mycom1.Parity=Convert.ToByte(t_parity.Text,10); // 0-4=no,odd,even,mark,space

   mycom1.StopBits=Convert.ToByte(t_stopbyte.Text,10); // 0,1,2 = 1, 1.5, 2 

   //iTimeout=3;

   if(this.OpenCom())

    msg.AppendText("串口初始化成功……\r\n");

   else

    msg.AppendText("串口初始化失败！\r\n");

  }

//程序关闭，结束串口

  private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)

  {

   mycom1.Close();

  }



  private void button5_Click(object sender, System.EventArgs e)

  {

   if(mycom1.Opened)

   {

    mycom1.Close();

    button5.Text="开启串口";

    msg.AppendText("\r\n串口被关闭……");

   }

   else

   {

    mycom1.Open();

    button5.Text="关闭串口";

    msg.AppendText("\r\n串口成功开启……");

   }

  }

threenewbee 2009-08-24

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using System;

using System.Runtime.InteropServices;



namespace BusApp

{

 /// <summary>

 /// 

 /// </summary>

 public class mycom

 {

  public mycom()

  {

   // 

   // TODO: 在此处添加构造函数逻辑

   //

  }

  public int PortNum; //1,2,3,4

  public int BaudRate; //1200,2400,4800,9600

  public byte ByteSize; //8 bits

  public byte Parity; // 0-4=no,odd,even,mark,space 

  public byte StopBits; // 0,1,2 = 1, 1.5, 2 

  public int ReadTimeout; //10

  

  //comm port win32 file handle

  private int hComm = -1;

  

  public bool Opened = false;

   

  //win32 api constants

  private const uint GENERIC_READ = 0x80000000;

  private const uint GENERIC_WRITE = 0x40000000;

  private const int OPEN_EXISTING = 3;  

  private const int INVALID_HANDLE_VALUE = -1;

  

  [StructLayout(LayoutKind.Sequential)]

   private struct DCB 

  {

   //taken from c struct in platform sdk 

   public int DCBlength;           // sizeof(DCB) 

   public int BaudRate;            // current baud rate 

   public int fBinary;          // binary mode, no EOF check 

   public int fParity;          // enable parity checking 

   public int fOutxCtsFlow;      // CTS output flow control 

   public int fOutxDsrFlow;      // DSR output flow control 

   public int fDtrControl;       // DTR flow control type 

   public int fDsrSensitivity;   // DSR sensitivity 

   public int fTXContinueOnXoff; // XOFF continues Tx 

   public int fOutX;          // XON/XOFF out flow control 

   public int fInX;           // XON/XOFF in flow control 

   public int fErrorChar;     // enable error replacement 

   public int fNull;          // enable null stripping 

   public int fRtsControl;     // RTS flow control 

   public int fAbortOnError;   // abort on error 

   public int fDummy2;        // reserved 

   public ushort wReserved;          // not currently used 

   public ushort XonLim;             // transmit XON threshold 

   public ushort XoffLim;            // transmit XOFF threshold 

   public byte ByteSize;           // number of bits/byte, 4-8 

   public byte Parity;             // 0-4=no,odd,even,mark,space 

   public byte StopBits;           // 0,1,2 = 1, 1.5, 2 

   public char XonChar;            // Tx and Rx XON character 

   public char XoffChar;           // Tx and Rx XOFF character 

   public char ErrorChar;          // error replacement character 

   public char EofChar;            // end of input character 

   public char EvtChar;            // received event character 

   public ushort wReserved1;         // reserved; do not use 

  }



  [StructLayout(LayoutKind.Sequential)]

   private struct COMMTIMEOUTS 

  {  

   public int ReadIntervalTimeout; 

   public int ReadTotalTimeoutMultiplier; 

   public int ReadTotalTimeoutConstant; 

   public int WriteTotalTimeoutMultiplier; 

   public int WriteTotalTimeoutConstant; 

  }  



  [StructLayout(LayoutKind.Sequential)] 

   private struct OVERLAPPED 

  { 

   public int  Internal; 

   public int  InternalHigh; 

   public int  Offset; 

   public int  OffsetHigh; 

   public int hEvent; 

  }  

  

  [DllImport("kernel32.dll")]

  private static extern int CreateFile(

   string lpFileName,                         // file name

   uint dwDesiredAccess,                      // access mode

   int dwShareMode,                          // share mode

   int lpSecurityAttributes, // SD

   int dwCreationDisposition,                // how to create

   int dwFlagsAndAttributes,                 // file attributes

   int hTemplateFile                        // handle to template file

   );

  [DllImport("kernel32.dll")]

  private static extern bool GetCommState(

   int hFile,  // handle to communications device

   ref DCB lpDCB    // device-control block

   ); 

  [DllImport("kernel32.dll")]

  private static extern bool BuildCommDCB(

   string lpDef,  // device-control string

   ref DCB lpDCB     // device-control block

   );

  [DllImport("kernel32.dll")]

  private static extern bool SetCommState(

   int hFile,  // handle to communications device

   ref DCB lpDCB    // device-control block

   );

  [DllImport("kernel32.dll")]

  private static extern bool GetCommTimeouts(

   int hFile,                  // handle to comm device

   ref COMMTIMEOUTS lpCommTimeouts  // time-out values

   ); 

  [DllImport("kernel32.dll")] 

  private static extern bool SetCommTimeouts(

   int hFile,                  // handle to comm device

   ref COMMTIMEOUTS lpCommTimeouts  // time-out values

   );

  [DllImport("kernel32.dll")]

  private static extern bool ReadFile(

   int hFile,                // handle to file

   byte[] lpBuffer,             // data buffer

   int nNumberOfBytesToRead,  // number of bytes to read

   ref int lpNumberOfBytesRead, // number of bytes read

   ref OVERLAPPED lpOverlapped    // overlapped buffer

   );

  [DllImport("kernel32.dll")] 

  private static extern bool WriteFile(

   int hFile,                    // handle to file

   byte[] lpBuffer,                // data buffer

   int nNumberOfBytesToWrite,     // number of bytes to write

   ref int lpNumberOfBytesWritten,  // number of bytes written

   ref OVERLAPPED lpOverlapped        // overlapped buffer

   );

  [DllImport("kernel32.dll")]

  private static extern bool CloseHandle(

   int hObject   // handle to object

   );

  

  public void Open() 

  {

   

   DCB dcbCommPort = new DCB();

   COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS(); 

   

   

   // OPEN THE COMM PORT.



    

   hComm = CreateFile("COM" + PortNum ,GENERIC_READ | GENERIC_WRITE,0, 0,OPEN_EXISTING,0,0);

  

   // IF THE PORT CANNOT BE OPENED, BAIL OUT.

   if(hComm == INVALID_HANDLE_VALUE) 

   {

    throw(new ApplicationException("Comm Port Can Not Be Opened"));

   }

  

   // SET THE COMM TIMEOUTS.

   

   GetCommTimeouts(hComm,ref ctoCommPort);

   ctoCommPort.ReadTotalTimeoutConstant = ReadTimeout;

   ctoCommPort.ReadTotalTimeoutMultiplier = 0;

   ctoCommPort.WriteTotalTimeoutMultiplier = 0;

   ctoCommPort.WriteTotalTimeoutConstant = 0;  

   SetCommTimeouts(hComm,ref ctoCommPort);

  

   // SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.

   // THERE ARE OTHER WAYS OF DOING SETTING THESE BUT THIS IS THE EASIEST.

   // IF YOU WANT TO LATER ADD CODE FOR OTHER BAUD RATES, REMEMBER

   // THAT THE ARGUMENT FOR BuildCommDCB MUST BE A POINTER TO A STRING.

   // ALSO NOTE THAT BuildCommDCB() DEFAULTS TO NO HANDSHAKING.

  

   dcbCommPort.DCBlength = Marshal.SizeOf(dcbCommPort);

   GetCommState(hComm, ref dcbCommPort);

   dcbCommPort.BaudRate=BaudRate;

   dcbCommPort.Parity=Parity;

   dcbCommPort.ByteSize=ByteSize;

   dcbCommPort.StopBits=StopBits;

   SetCommState(hComm, ref dcbCommPort);

    

   Opened = true;

    

  }

  

  public void Close() 

  {

   if (hComm!=INVALID_HANDLE_VALUE) 

   {

    CloseHandle(hComm);

                Opened=false;

   }

  }

  

  public byte[] Read(int NumBytes) 

  {

   byte[] BufBytes;

   byte[] OutBytes;

   BufBytes = new byte[NumBytes];

   if (hComm!=INVALID_HANDLE_VALUE) 

   {

    OVERLAPPED ovlCommPort = new OVERLAPPED();

    int BytesRead=0;

    ReadFile(hComm,BufBytes,NumBytes,ref BytesRead,ref ovlCommPort);

    OutBytes = new byte[BytesRead];

    Array.Copy(BufBytes,OutBytes,BytesRead);

   } 

   else 

   {

    throw(new ApplicationException("Comm Port Not Open"));

   }

   return OutBytes;

  }

  

  public int Write(byte[] WriteBytes) 

  {

   int BytesWritten = 0;

   if (hComm!=INVALID_HANDLE_VALUE) 

   {

    OVERLAPPED ovlCommPort = new OVERLAPPED();

    WriteFile(hComm,WriteBytes,WriteBytes.Length,ref BytesWritten,ref ovlCommPort);

   }

   else 

   {

    throw(new ApplicationException("Comm Port Not Open"));

   }  

   return BytesWritten;

  }

 }

}

by 小y。

请问C#读写串口的方法

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