using System; using System.Runtime.InteropServices;namespace Test { /// <summary> /// SerialPort 的摘要说明。 /// </summary> public class SerialPort { #region 申明要引用的和串口调用有关的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 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.
[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,,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; } [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("coredll")] 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("coredll.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 ); #endif 接下
#if FULLFRAMEWORK [DllImport("coredll")] private static extern bool GetCommState( int hFile, // handle to communications device ref DCB lpDCB // device-control block ); #else [DllImport("coredll.dll")] private static extern bool GetCommState( int hFile, // handle to communications device ref DCB lpDCB // device-control block ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool BuildCommDCB( string lpDef, // device-control string ref DCB lpDCB // device-control block ); #else [DllImport("coredll.dll")] private static extern bool BuildCommDCB( string lpDef, // device-control string ref DCB lpDCB // device-control block ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool SetCommState( int hFile, // handle to communications device ref DCB lpDCB // device-control block ); #else [DllImport("coredll.dll")] private static extern bool SetCommState( int hFile, // handle to communications device ref DCB lpDCB // device-control block ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool GetCommTimeouts( int hFile, // handle to comm device ref COMMTIMEOUTS lpCommTimeouts // time-out values ); #else [DllImport("coredll.dll")] private static extern bool GetCommTimeouts( int hFile, // handle to comm device ref COMMTIMEOUTS lpCommTimeouts // time-out values ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool SetCommTimeouts( int hFile, // handle to comm device ref COMMTIMEOUTS lpCommTimeouts // time-out values ); #else [DllImport("coredll.dll")] private static extern bool SetCommTimeouts( int hFile, // handle to comm device ref COMMTIMEOUTS lpCommTimeouts // time-out values ); #endif #if FULLFRAMEWORK [DllImport("coredll")] 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("coredll.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 ); #endif #if FULLFRAMEWORK [DllImport("coredll")] 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("coredll.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 ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool CloseHandle( int hObject // handle to object ); #else [DllImport("coredll.dll")] private static extern bool CloseHandle( int hObject // handle to object ); #endif 接下
#if FULLFRAMEWORK [DllImport("coredll")] private static extern bool ClearCommError( int hFile, // handle to file ref int lpErrors, ref COMSTAT lpStat ); #else [DllImport("coredll.dll")] private static extern bool ClearCommError( int hFile, // handle to file ref int lpErrors, ref COMSTAT lpStat ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool PurgeComm( int hFile, // handle to file uint dwFlags ); #else [DllImport("coredll.dll")] private static extern bool PurgeComm( int hFile, // handle to file uint dwFlags ); #endif #if FULLFRAMEWORK [DllImport("coredll")] private static extern bool SetupComm( int hFile, int dwInQueue, int dwOutQueue ); #else [DllImport("coredll.dll")] private static extern bool SetupComm( int hFile, int dwInQueue, int dwOutQueue ); #endif #endregion // SerialPort的成员变量 private int hComm = INVALID_HANDLE_VALUE; private bool bOpened = false; public bool Opened { get { return bOpened; } }
/// <summary> ///串口的初始化函数 ///lpFileName 端口名 ///baudRate 波特率 ///parity 校验位 ///byteSize 数据位 ///stopBits 停止位 /// <summary> public bool OpenPort(string lpFileName,int baudRate,byte parity, byte byteSize, byte stopBits) { // OPEN THE COMM PORT. hComm = CreateFile(lpFileName ,GENERIC_READ | GENERIC_WRITE, 0,0, OPEN_EXISTING, 0, 0); // IF THE PORT CANNOT BE OPENED, BAIL OUT. if(hComm == INVALID_HANDLE_VALUE) { return false; } SetupComm(hComm, MAXBLOCK, MAXBLOCK);
// SET THE COMM TIMEOUTS. COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS(); GetCommTimeouts(hComm,ref ctoCommPort); ctoCommPort.ReadIntervalTimeout = Int32.MaxValue; ctoCommPort.ReadTotalTimeoutConstant = 0; ctoCommPort.ReadTotalTimeoutMultiplier = 0; ctoCommPort.WriteTotalTimeoutMultiplier = 10; ctoCommPort.WriteTotalTimeoutConstant = 1000; 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. DCB dcbCommPort = new DCB(); 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); PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT); PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT);
bOpened = true; return true; } // 关闭串口 public bool ClosePort() { if (hComm == INVALID_HANDLE_VALUE) { return false; }
if (CloseHandle(hComm)) { hComm = INVALID_HANDLE_VALUE; bOpened = false; return true; } else { return false; } } // 往串口写数据 public bool WritePort(byte[] WriteBytes) { if (hComm == INVALID_HANDLE_VALUE) { return false; } COMSTAT ComStat = new COMSTAT(); int dwErrorFlags = 0; ClearCommError(hComm, ref dwErrorFlags, ref ComStat); if (dwErrorFlags != 0) PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT); OVERLAPPED ovlCommPort = new OVERLAPPED(); int BytesWritten = 0; return WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort); }
// 从串口读数据 public bool ReadPort(int NumBytes, ref byte[] commRead) { if (hComm == INVALID_HANDLE_VALUE) { return false; }
COMSTAT ComStat = new COMSTAT(); int dwErrorFlags = 0; ClearCommError(hComm, ref dwErrorFlags, ref ComStat); if (dwErrorFlags != 0) PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
using System.Runtime.InteropServices;namespace Test
{
/// <summary>
/// SerialPort 的摘要说明。
/// </summary>
public class SerialPort
{
#region 申明要引用的和串口调用有关的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 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.
[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,,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;
} [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("coredll")]
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("coredll.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
);
#endif
接下
[DllImport("coredll")]
private static extern bool GetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#else
[DllImport("coredll.dll")]
private static extern bool GetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool BuildCommDCB(
string lpDef, // device-control string
ref DCB lpDCB // device-control block
);
#else
[DllImport("coredll.dll")]
private static extern bool BuildCommDCB(
string lpDef, // device-control string
ref DCB lpDCB // device-control block
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool SetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#else
[DllImport("coredll.dll")]
private static extern bool SetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool GetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#else
[DllImport("coredll.dll")]
private static extern bool GetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool SetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#else
[DllImport("coredll.dll")]
private static extern bool SetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
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("coredll.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
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
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("coredll.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
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool CloseHandle(
int hObject // handle to object
);
#else
[DllImport("coredll.dll")]
private static extern bool CloseHandle(
int hObject // handle to object
);
#endif
接下
[DllImport("coredll")]
private static extern bool ClearCommError(
int hFile, // handle to file
ref int lpErrors,
ref COMSTAT lpStat
);
#else
[DllImport("coredll.dll")]
private static extern bool ClearCommError(
int hFile, // handle to file
ref int lpErrors,
ref COMSTAT lpStat
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool PurgeComm(
int hFile, // handle to file
uint dwFlags
);
#else
[DllImport("coredll.dll")]
private static extern bool PurgeComm(
int hFile, // handle to file
uint dwFlags
);
#endif
#if FULLFRAMEWORK
[DllImport("coredll")]
private static extern bool SetupComm(
int hFile,
int dwInQueue,
int dwOutQueue
);
#else
[DllImport("coredll.dll")]
private static extern bool SetupComm(
int hFile,
int dwInQueue,
int dwOutQueue
);
#endif
#endregion // SerialPort的成员变量
private int hComm = INVALID_HANDLE_VALUE;
private bool bOpened = false; public bool Opened
{
get
{
return bOpened;
}
}
/// <summary>
///串口的初始化函数
///lpFileName 端口名
///baudRate 波特率
///parity 校验位
///byteSize 数据位
///stopBits 停止位
/// <summary>
public bool OpenPort(string lpFileName,int baudRate,byte parity, byte byteSize, byte stopBits)
{
// OPEN THE COMM PORT.
hComm = CreateFile(lpFileName ,GENERIC_READ | GENERIC_WRITE, 0,0, OPEN_EXISTING, 0, 0);
// IF THE PORT CANNOT BE OPENED, BAIL OUT.
if(hComm == INVALID_HANDLE_VALUE)
{
return false;
} SetupComm(hComm, MAXBLOCK, MAXBLOCK);
// SET THE COMM TIMEOUTS.
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();
GetCommTimeouts(hComm,ref ctoCommPort);
ctoCommPort.ReadIntervalTimeout = Int32.MaxValue;
ctoCommPort.ReadTotalTimeoutConstant = 0;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutMultiplier = 10;
ctoCommPort.WriteTotalTimeoutConstant = 1000;
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.
DCB dcbCommPort = new DCB();
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); PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT);
bOpened = true;
return true;
} // 关闭串口
public bool ClosePort()
{
if (hComm == INVALID_HANDLE_VALUE)
{
return false;
}
if (CloseHandle(hComm))
{
hComm = INVALID_HANDLE_VALUE;
bOpened = false;
return true;
}
else
{
return false;
}
} // 往串口写数据
public bool WritePort(byte[] WriteBytes)
{
if (hComm == INVALID_HANDLE_VALUE)
{
return false;
} COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0; ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT); OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesWritten = 0;
return WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort);
}
// 从串口读数据
public bool ReadPort(int NumBytes, ref byte[] commRead)
{
if (hComm == INVALID_HANDLE_VALUE)
{
return false;
}
COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0; ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
if (ComStat.cbInQue > 0)
{
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesRead = 0;
return ReadFile(hComm, commRead, NumBytes, ref BytesRead, ref ovlCommPort);
}
else
{
return false;
}
}
}
}