200分求C#对串口编程的实例，要有中文注释！非常感谢！最近要做一个小程序，从8051单片机读取数据！

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;namespace printuseapi
{
public class writeLpt1
{
#region 申明要引用的和並口要調用的API
//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;
private const uint FILE_FLAG_OVERLAPPED = 0x40000000;   //異步通訊
private const int MAXBLOCK = 4096; private const uint PURGE_TXABORT = 0x0001;  // Kill the pending/current writes to the comm port.
private const uint PURGE_RXABORT = 0x0002;  // Kill the pending/current reads to the comm port.
private const uint PURGE_TXCLEAR = 0x0004;  // Kill the transmit queue if there.
private const uint PURGE_RXCLEAR = 0x0008;  // Kill the typeahead buffer if there.

private const int EV_RXCHAR = 0x0001; //private const uint EV_RXCHAR =

[StructLayout(LayoutKind.Sequential)]
private struct DCB
{
//taken from c struct in platform sdk
public int DCBlength;
public int BaudRate;
public int fBinary;
public int fParity;
public int fOutxCtsFlow;
public int fOutxDsrFlow;
public int fDtrControl;
public int fDsrSensitivity;
public int fTXContinueOnXoff;
public int fOutX;
public int fInX;
public int fErrorChar;
public int fNull;
public int fRtsControl;

public int fAbortOnError;
public int fDummy2;
public ushort wReserved;         public ushort XonLim;
public ushort XoffLim;
public byte ByteSize;
public byte Parity;
public byte StopBits;
public char XonChar;
public char XoffChar;
public char ErrorChar;

public char EofChar;
public char EvtChar;
public ushort wReserved1;
} [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;
}

[StructLayout(LayoutKind.Sequential)]
private struct COMSTAT
{
/*public int fCtsHold;
public int fDsrHold;
public int fRlsdHold;
public int fXoffHold;
public int fXoffSent;
public int fEof;
public int fTxim;
public int fReserved;
public int cbInQue;
public int cbOutQue;*/
// Should have a reverse, i don't know why!!!!!
public int cbOutQue;
public int cbInQue;
public int fReserved;
public int fTxim;
public int fEof;
public int fXoffSent;
public int fXoffHold;
public int fRlsdHold;
public int fDsrHold;
public int fCtsHold;
}
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  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
   );
#else
[DllImport("kernel32")]
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
uint dwFlagsAndAttributes,                 // file attributes
int hTemplateFile                        // handle to template file
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool GetCommState(
   int hFile,  // handle to communications device
   ref DCB lpDCB    // device-control block
   );
#else
//取得並口狀態
[DllImport("kernel32")]
private static extern bool GetCommState(
int hFile,  // handle to communications device
ref DCB lpDCB    // device-control block
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool BuildCommDCB(
   string lpDef,  // device-control string
   ref DCB lpDCB     // device-control block
   );
#else
[DllImport("kernel32")]
private static extern bool BuildCommDCB(
string lpDef,  // device-control string
ref DCB lpDCB     // device-control block
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool SetCommState(
   int hFile,  // handle to communications device
   ref DCB lpDCB    // device-control block
   );
#else
[DllImport("kernel32")]
private static extern bool SetCommState(
int hFile,  // handle to communications device
ref DCB lpDCB    // device-control block
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool GetCommTimeouts(
   int hFile,                  // handle to comm device
   ref COMMTIMEOUTS lpCommTimeouts  // time-out values
   );
#else
[DllImport("kernel32")]
private static extern bool GetCommTimeouts(
int hFile,                  // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts  // time-out values
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool SetCommTimeouts(
   int hFile,                  // handle to comm device
   ref COMMTIMEOUTS lpCommTimeouts  // time-out values
   );
#else
[DllImport("kernel32")]
private static extern bool SetCommTimeouts(
int hFile,                  // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts  // time-out values
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  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
   );
#else
[DllImport("kernel32")]
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
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  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
   );
#else
[DllImport("kernel32")]
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
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool CloseHandle(
   int hObject   // handle to object
   );
#else
[DllImport("kernel32")]
private static extern bool CloseHandle(
int hObject   // handle to object
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool ClearCommError(
   int hFile,     // handle to file
   ref int lpErrors,
   ref COMSTAT lpStat
  );
#else
[DllImport("kernel32")]
private static extern bool ClearCommError(
int hFile,     // handle to file
ref int lpErrors,
ref COMSTAT lpStat
);
#endif

#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool PurgeComm(
   int hFile,     // handle to file
   uint dwFlags
   );
#else
[DllImport("kernel32")]
private static extern bool PurgeComm(
int hFile,     // handle to file
uint dwFlags
);
#endif
#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool SetupComm(
   int hFile,
   int dwInQueue,
   int dwOutQueue
  );
#else
[DllImport("kernel32")]
private static extern bool SetupComm(
int hFile,
int dwInQueue,
int dwOutQueue
);
#endif#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool SetCommMask(
int hFile,
int dwEvtMask //梓隴岈璃腔栚鎢
   );
#else
[DllImport("kernel32")]
private static extern bool SetCommMask(
int hFile,
int dwEvtMask //表明事件的掩碼
);
#endif#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern bool WaitCommEvent(
int hFile,
ref int lpEvtMask,
ref OVERLAPPED lpOverlapped

);
#else
[DllImport("kernel32")]
private static extern bool WaitCommEvent(
int hFile,
int dwEvtMask,
ref OVERLAPPED lpOverlapped
);
#endif#if FULLFRAMEWORK
  [DllImport("kernel32")]
  private static extern int CreateEvent(
int lpSecurityAttributes,
bool bManualReset,
bool bInitialState,
string lpName
);
#else
[DllImport("kernel32")]
private static extern int CreateEvent(

int lpSecurityAttributes,
bool bManualReset,
bool bInitialState,
string lpName
);
#endif
//private static extern int
#endregion // SerialPort成員
private int hComm = INVALID_HANDLE_VALUE;
private bool bOpened = false; //標志並口初始化成功與否的標志 public bool Opened //用屬性返回標志變量
{
get
{
return bOpened;
}
}

调试易

200分求C#对串口编程的实例，要有中文注释！非常感谢！最近要做一个小程序，从8051单片机读取数据！

解决方案 »