if (Parity>0)
{
dcbCommPort.flags|=2;
}
dcbCommPort.Parity=Parity;
dcbCommPort.ByteSize=ByteSize;
dcbCommPort.StopBits=StopBits;
dcbCommPort.fOutxCtsFlow = 524800;
if (!SetCommState(hComm, ref dcbCommPort))
{
CloseHandle(hComm);
throw(new ApplicationException("非法操作,不能打开串口!"));
}
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)
{
throw(new ApplicationException("串口未打开!"));
}
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesRead=0;
ReadFile(hComm,BufBytes,NumBytes,ref BytesRead,ref ovlCommPort);
OutBytes = new byte[BytesRead];
Array.Copy(BufBytes,OutBytes,BytesRead);
return OutBytes;
}
public void Write(byte[] WriteBytes)
{
if (hComm == INVALID_HANDLE_VALUE)
{
throw(new ApplicationException("串口未打开!"));
}
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesWritten = 0;
WriteFile(hComm,WriteBytes,WriteBytes.Length,ref BytesWritten,ref ovlCommPort);
}
}
public class HexCon
{
// 把十六进制字符串转换成字节型和把字节型转换成十六进制字符串
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;
}
using System;
using System.Runtime.InteropServices;
namespace CommPort
{
/// <summary>
/// ClassCommPort 的摘要说明。
/// </summary>
public class ClassCommPort
{
public ClassCommPort()
{
}
public string PortNum;
public int BaudRate;
public byte ByteSize;
public byte Parity; // 0-4=no,odd,even,mark,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;// 指定当前波特率 current baud rate
// these are the c struct bit fields, bit twiddle flag to set
public int fBinary;// 指定是否允许二进制模式,在windows95中必须主TRUE binary mode, no EOF check
public int fParity;// 指定是否允许奇偶校验 enable parity checking
public int fOutxCtsFlow;// 指定CTS是否用于检测发送控制,当为TRUE是CTS为OFF,发送将被挂起。 CTS output flow control
public int fOutxDsrFlow;// 指定CTS是否用于检测发送控制 DSR output flow control
public int fDtrControl;// DTR_CONTROL_DISABLE值将DTR置为OFF, DTR_CONTROL_ENABLE值将DTR置为ON, DTR_CONTROL_HANDSHAKE允许DTR"握手" DTR flow control type
public int fDsrSensitivity;// 当该值为TRUE时DSR为OFF时接收的字节被忽略 DSR sensitivity
public int fTXContinueOnXoff;// 指定当接收缓冲区已满,并且驱动程序已经发送出XoffChar字符时发送是否停止。TRUE时,在接收缓冲区接收到缓冲区已满的字节XoffLim且驱动程序已经发送出XoffChar字符中止接收字节之后,发送继续进行。 FALSE时,在接收缓冲区接收到代表缓冲区已空的字节XonChar且驱动程序已经发送出恢复发送的XonChar之后,发送继续进行。XOFF continues Tx
public int fOutX;// TRUE时,接收到XoffChar之后便停止发送接收到XonChar之后将重新开始 XON/XOFF out flow control
public int fInX;// TRUE时,接收缓冲区接收到代表缓冲区满的XoffLim之后,XoffChar发送出去接收缓冲区接收到代表缓冲区空的XonLim之后,XonChar发送出去 XON/XOFF in flow control
public int fErrorChar;// 该值为TRUE且fParity为TRUE时,用ErrorChar 成员指定的字符代替奇偶校验错误的接收字符 enable error replacement
public int fNull;// eTRUE时,接收时去掉空(0值)字节 enable null stripping
public int fRtsControl;// RTS flow control
/*RTS_CONTROL_DISABLE时,RTS置为OFF
RTS_CONTROL_ENABLE时, RTS置为ON
RTS_CONTROL_HANDSHAKE时,
当接收缓冲区小于半满时RTS为ON
当接收缓冲区超过四分之三满时RTS为OFF
RTS_CONTROL_TOGGLE时,
当接收缓冲区仍有剩余字节时RTS为ON ,否则缺省为OFF*/
public int fAbortOnError;// TRUE时,有错误发生时中止读和写操作 abort on error
public int fDummy2;// 未使用 reserved
public uint flags;
public ushort wReserved;// 未使用,必须为0 not currently used
public ushort XonLim;// 指定在XON字符发送这前接收缓冲区中可允许的最小字节数 transmit XON threshold
public ushort XoffLim;// 指定在XOFF字符发送这前接收缓冲区中可允许的最小字节数 transmit XOFF threshold
public byte ByteSize;// 指定端口当前使用的数据位number of bits/byte, 4-8
public byte Parity;// 指定端口当前使用的奇偶校验方法,可能为:EVENPARITY,MARKPARITY,NOPARITY,ODDPARITY 0-4=no,odd,even,mark,space
public byte StopBits;// 指定端口当前使用的停止位数,可能为:ONESTOPBIT,ONE5STOPBITS,TWOSTOPBITS 0,1,2 = 1, 1.5, 2
public char XonChar;// 指定用于发送和接收字符XON的值 Tx and Rx XON character
public char XoffChar;// 指定用于发送和接收字符XOFF值 Tx and Rx XOFF character
public char ErrorChar;// 本字符用来代替接收到的奇偶校验发生错误时的值 error replacement character
public char EofChar;// 当没有使用二进制模式时,本字符可用来指示数据的结束 end of input character
public char EvtChar;// 当接收到此字符时,会产生一个事件 received event character
public ushort wReserved1;// 未使用 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,// 要打开的串口名称
uint dwDesiredAccess,// 指定串口的访问方式,一般设置为可读可写方式
int dwShareMode,// 指定串口的共享模式,串口不能共享,所以设置为0
int lpSecurityAttributes,// 设置串口的安全属性,WIN9X下不支持,应设为NULL
int dwCreationDisposition,// 对于串口通信,创建方式只能为OPEN_EXISTING
int dwFlagsAndAttributes,// 指定串口属性与标志,设置为FILE_FLAG_OVERLAPPED(重叠I/O操作),指定串口以异步方式通信
int hTemplateFile// 对于串口通信必须设置为NULL
);
[DllImport("kernel32.dll")]
private static extern bool GetCommState(
int hFile,//通信设备句柄
ref DCB lpDCB// 设备控制块DCB
);
[DllImport("kernel32.dll")]
private static extern bool BuildCommDCB(
string lpDef,// 设备控制字符串
ref DCB lpDCB// 设备控制块
);
[DllImport("kernel32.dll")]
private static extern bool SetCommState(
int hFile,// 通信设备句柄
ref DCB lpDCB// 设备控制块
);
[DllImport("kernel32.dll")]
private static extern bool GetCommTimeouts(
int hFile,// 通信设备句柄
ref COMMTIMEOUTS lpCommTimeouts// 超时时间
);
[DllImport("kernel32.dll")]
private static extern bool SetCommTimeouts(
int hFile,// 通信设备句柄
ref COMMTIMEOUTS lpCommTimeouts// 超时时间
);
[DllImport("kernel32.dll")]
private static extern bool ReadFile(
int hFile,// 通信设备句柄
byte[] lpBuffer,// 数据缓冲区
int nNumberOfBytesToRead,// 多少字节等待读取
ref int lpNumberOfBytesRead,// 读取多少字节
ref OVERLAPPED lpOverlapped// 溢出缓冲区
);
[DllImport("kernel32.dll")]
private static extern bool WriteFile(
int hFile,// 通信设备句柄
byte[] lpBuffer,// 数据缓冲区
int nNumberOfBytesToWrite,// 多少字节等待写入
ref int lpNumberOfBytesWritten,// 已经写入多少字节
ref OVERLAPPED lpOverlapped// 溢出缓冲区
);
[DllImport("kernel32.dll")]
private static extern bool CloseHandle(
int hObject
);
[DllImport("kernel32.dll")]
private static extern uint GetLastError();