串口操作源码.doc

/* YFCOM.cpp /* YFSoft 2005 - 2006(C) /* /* 200644 /* /* /* /* V1.0 /* #include stdafx.h #include yfcom.h / HANDLE m_COM_Handle; / OVERLAPPED m_OverlappedRead, m_OverlappedWrite; /* / OpenCom / long lngPort, / char *cfgMessage, 9600,e,8,1 / long lngInSize, / long lngOutSize / long / / / / / 200644 / / / /* long OpenCom(long lngPort,char *cfgMessage,long lngInSize,long lngOutSize) try char szMsg255; DCB dcb; / if (lngPort9) sprintf( szMsg, .COM%d, lngPort ); else sprintf( szMsg, COM%d, lngPort ); / m_COM_Handle = CreateFile(szMsg, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED , NULL ); if( m_COM_Handle = NULL ) return( 2 ); / memset(&(m_OverlappedRead), 0, sizeof (OVERLAPPED); memset(&(m_OverlappedWrite), 0, sizeof (OVERLAPPED); /dcb dcb.DCBlength = sizeof( DCB ); / GetCommState(m_COM_Handle , &dcb ); /, 9600,n,8,1 sprintf(szMsg,COM%d:%s, lngPort,cfgMessage); BuildCommDCB(szMsg,&dcb); /- dcb.fBinary=TRUE; / dcb.fOutxCtsFlow=FALSE; /CTS dcb.fOutxDsrFlow=FALSE; /DSR dcb.fDtrControl=DTR_CONTROL_DISABLE; /DTR dcb.fDsrSensitivity=FALSE; /DTR dcb.fTXContinueOnXoff=TRUE; / dcb.fOutX=FALSE; / dcb.fInX =FALSE; / dcb.fErrorChar=FALSE; / dcb.fNull=FALSE; /NULL dcb.fRtsControl=RTS_CONTROL_ENABLE; /RTS dcb.fAbortOnError=FALSE; / dcb.fDummy2=0; / dcb.wReserved=0; /0 dcb.XonLim=0; /XOFF dcb.XoffLim=0; /XOFF 2006-5-2 19:47 ikkoku01 6 2 dcb.XonChar=0; /XON dcb.XoffChar=0; /XOFF dcb.ErrorChar=0; / dcb.EofChar=0; / dcb.EvtChar=0; / dcb.wReserved1=0; / /dcb.BaudRate =9600; / /dcb.Parity=0; / /dcb.ByteSize=8; / /dcb.StopBits=0; / /- if(dcb.Parity=0 ) / 0-4=None,Odd,Even,Mark,Space dcb.fParity=FALSE; / else dcb.fParity=TRUE; / sprintf(szMsg,COM%d:%d,%d,%d,%d (InSize:%ld,OutSize:%ld), lngPort,dcb.BaudRate,dcb.Parity,dcb.ByteSize,dcb.StopBits,lngInSize,lngOutSize); / COMMTIMEOUTS CommTimeOuts; / CommTimeOuts.ReadIntervalTimeout =0; /ms readfile CommTimeOuts.ReadTotalTimeoutMultiplier =0; /() CommTimeOuts.ReadTotalTimeoutConstant = 2500; /ms CommTimeOuts.WriteTotalTimeoutMultiplier =0; /() CommTimeOuts.WriteTotalTimeoutConstant = 2500; / SetCommTimeouts( m_COM_Handle, &CommTimeOuts ); / m_OverlappedRead.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); m_OverlappedWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if( !SetCommState( m_COM_Handle, &dcb ) | / !SetupComm( m_COM_Handle, lngInSize, lngOutSize ) | / m_OverlappedRead.hEvent=NULL | m_OverlappedWrite.hEvent=NULL) DWORD dwError = GetLastError(); / if( m_OverlappedRead.hEvent != NULL ) CloseHandle( m_OverlappedRead.hEvent ); if( m_OverlappedWrite.hEvent != NULL ) CloseHandle( m_OverlappedWrite.hEvent ); CloseHandle( m_COM_Handle ); m_COM_Handle=NULL; return dwError; return( 0 ); catch(.) return -1; /* / CloseCom / / long / / / / / 200644 / / / /* long CloseCom() try if(m_COM_Handle = NULL ) return( 1 ); SetCommMask(m_COM_Handle ,NULL); SetEvent(m_OverlappedRead.hEvent); SetEvent(m_OverlappedWrite.hEvent); 2006-5-2 19:47 ikkoku01 6 3 if( m_OverlappedRead.hEvent != NULL ) CloseHandle( m_OverlappedRead.hEvent ); if( m_OverlappedWrite.hEvent != NULL ) CloseHandle( m_OverlappedWrite.hEvent ); if (CloseHandle( m_COM_Handle )=FALSE)return (2); m_COM_Handle = NULL; catch(.) return (3); return( 0 ); /* / SendData / BYTE *bytBuffer, / long lngSize / long / / / / / 200644 / / / /* long SendData(BYTE *bytBuffer, long lngSize ) try if( m_COM_Handle = NULL ) return( -1 ); DWORD dwBytesWritten=lngSize; BOOL bWriteStat; COMSTAT ComStat; DWORD dwErrorFlags; ClearCommError(m_COM_Handle,&dwErrorFlags,&ComStat); bWriteStat=WriteFile(m_COM_Handle, bytBuffer, lngSize, &dwBytesWritten, &(m_OverlappedWrite); if(!bWriteStat) if(GetLastError()=ERROR_IO_PENDING) GetOverlappedResult(m_COM_Handle,&(m_OverlappedWrite),&dwBytesWritten,TRUE); / else dwBytesWritten=0; return (long)dwBytesWritten; catch(.) return -1; /* / AcceptData / BYTE *bytBuffer, / long lngSize / long / / / / / 200644 / / / /* long AcceptData(BYTE *bytBuffer, long lngSize ) try if( m_COM_Handle = NULL ) return( -1 ); DWORD lngBytesRead=lngSize; BOOL fReadStat; DWORD dwRes=0; / fReadStat=ReadFile(m_COM_Handle,bytBuffer,lngSize,&lngBytesRead,&(m_OverlappedRead); /Sleep(1); if( !fReadStat ) if( GetLastError() = ERROR_IO_PENDING ) / I/O dwRes=WaitForSingleObject(m_OverlappedRead.hEvent,1000); / switch(dwRes) case WAIT_OBJECT_0: / if(GetOverlappedResult(m_COM_Handle,&(m_OverlappedRead),&lngBytesRead,FALSE)=0) / return -2; break; case WAIT_TIMEOUT: / return -1; break; default: /WaitForSingleObject break; return lngBytesRead; catch(.) return -1; /* / ClearAcceptBuffer / / long / / / / / 200644 / / / /* long ClearAcceptBuffer() try if(m_COM_Handle = NULL ) return( -1 ); PurgeComm(m_COM_Handle,PURGE_RXABORT | PURGE_RXCLEA