C#串口通信编程类(修改版).doc

C#串口通信编程类(修改版) 这是从网上down下来的一个串口通信类，发现close函数忘记了设置Opened属性为false还有后面string转byte和byte转string的函数有错误，索性删掉了修改后的串口通信类如下：下一篇将把我的测试程序主程序部分全部代码贴出来可以坚强勇敢的用来实现串口通信。using System;using System.Runtime.InteropServices;namespace BusApp/ / / public class mycompublic mycom()/ / TODO: 在此处添加构造函数逻辑/public int PortNum; /1,2,3,4public int BaudRate; /1200,2400,4800,9600public byte ByteSize; /8 bitspublic 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 handleprivate int hComm = -1; public bool Opened = false; /win32 api constantsprivate 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 nameuint dwDesiredAccess, / access modeint dwShareMode, / share modeint lpSecurityAttributes, / SDint dwCreationDisposition, / how to createint dwFlagsAndAttributes, / file attributesint hTemplateFile / handle to template file);DllImport(kernel32.dll)private static extern bool GetCommState(int hFile, / handle to communications deviceref DCB lpDCB / device-control block); DllImport(kernel32.dll)private static extern bool BuildCommDCB(string lpDef, / device-control stringref DCB lpDCB / device-control block);DllImport(kernel32.dll)private static extern bool SetCommState(int hFile, / handle to communications deviceref DCB lpDCB / device-control block);DllImport(kernel32.dll)private static extern bool GetCommTimeouts(int hFile, / handle to comm deviceref COMMTIMEOUTS lpCommTimeouts / time-out values); DllImport(kernel32.dll) private static extern bool SetCommTimeouts(int hFile, / handle to comm deviceref COMMTIMEOUTS lpCommTimeouts / time-out values);DllImport(kernel32.dll)private static extern bool ReadFile(int hFile, / handle to filebyte lpBuffer, / data bufferint nNumberOfBytesToRead, / number of bytes to readref int lpNumberOfBytesRead, / number of bytes readref OVERLAPPED lpOverlapped / overlapped buffer);DllImport(kernel32.dll) private static extern bool WriteFile(int hFile, / handle to filebyte lpBuffer, / data bufferint nNumberOfBytesToWrite, / number of bytes to writeref int lpNumberOfBytesWritten, / number of bytes writtenref 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 Ou