求C#应用程序控制串口设备的例子~

给你一个串口类
using System;
using System.Runtime.InteropServices;namespace JustinIO {
class CommPort { public int PortNum;
public int BaudRate;
public byte ByteSize;
public byte Parity; // 0-4=no,odd,even,,space
public byte StopBits; // 0,1,2 = 1, 1.5, 2
public int ReadTimeout;

//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)]
public struct DCB {
//taken from c struct in platform sdk
public int DCBlength;           // sizeof(DCB)
public int BaudRate;            // current baud rate
/* these are the c struct bit fields, bit twiddle flag to set
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 uint flags;
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,,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
);
[DllImport("kernel32.dll")]
private static extern uint GetLastError();
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.
  GetCommState(hComm, ref dcbCommPort);
  dcbCommPort.BaudRate=BaudRate;
  dcbCommPort.flags=0;
  //dcb.fBinary=1;
  dcbCommPort.flags|=1;
  if (Parity>0)
  {
  //dcb.fParity=1
      dcbCommPort.flags|=2;
  }
  dcbCommPort.Parity=Parity;
  dcbCommPort.ByteSize=ByteSize;
  dcbCommPort.StopBits=StopBits;
  if (!SetCommState(hComm, ref dcbCommPort))
  {
//uint ErrorNum=GetLastError();
     throw(new ApplicationException("Comm Port Can Not Be Opened"));
  }
  //unre to see if setting took correctly
  //DCB dcbCommPort2 = new DCB();
  //GetCommState(hComm, ref dcbCommPort2);
  Opened = true;

}

public void Close() {
if (hComm!=INVALID_HANDLE_VALUE) {
CloseHandle(hComm);
}
}

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 void Write(byte[] WriteBytes) {
if (hComm!=INVALID_HANDLE_VALUE) {
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesWritten = 0;
WriteFile(hComm,WriteBytes,WriteBytes.Length,ref BytesWritten,ref ovlCommPort);
}
else {
throw(new ApplicationException("Comm Port Not Open"));
}
}
} class HexCon {
//converter hex string to byte and byte to hex string
public static string ByteToString(byte[] InBytes) {
string StringOut="";
foreach (byte InByte in InBytes) {
StringOut=StringOut + String.Format("{0:X2} ",InByte);
}
return StringOut;
}
public static byte[] StringToByte(string InString) {
string[] ByteStrings;
ByteStrings = InString.Split(" ".ToCharArray());
byte[] ByteOut;
ByteOut = new byte[ByteStrings.Length-1];
for (int i = 0;i==ByteStrings.Length-1;i++) {
ByteOut[i] = Convert.ToByte(("0x" + ByteStrings[i]));
}
return ByteOut;
}
}
}

调试易

求C#应用程序控制串口设备的例子~

解决方案 »