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文件大小: 249kb
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上传时间: 2011-03-25
详细说明： 串口通信C程序 //Set CommTimeOuts BOOL SetCommTimeOuts ( VOID ) { //SetComm Input & Output Buffer SetupComm ( hSerial ,MAXLEN * 2 ,MAXLEN * 2 ); //Read TimeOut TimeOuts.ReadIntervalTimeout = MAXDWORD; //Set Total Read TimeOut as MAXDWORD (0xFFFFFFFF) TimeOuts.ReadTotalTimeoutConstant = 0; //Read TimeOut Const TimeOuts.ReadTotalTimeoutMultiplier = 0; //Return Riht now //Write TimeOut TimeOuts.WriteTotalTimeoutMultiplier = 50; //TotalTimeOut = TimeAgr*NumOfChars+const time Ti meOuts.WriteTotalTimeoutConstant = 2000; //Set Write TimeOuts return ( FALSE != SetCommTimeouts ( hSerial,&TimeOuts ) ); } //Error MsgBox BOOL ErrMsg ( HWND hWnd,TCHAR *szErr ) { return ( FALSE != MessageBox ( hWnd,szErr,NULL,MB_OK | MB_ICONWARNING ) ); } //Read Comm BOOL ReadCom ( HWND hSet,BYTE InBuff[],INT BytesNum ) { DWORD dwBytesRead = 0; //Record The bytes already read INT iBytesToRead = 0; DWORD dwErrMask = 0; //Clear Memory ZeroMemory ( &ComState ,sizeof(ComState) ); ZeroMemory ( &OvLap ,sizeof(OvLap) ); OvLap.Offset = 0; OvLap.OffsetHigh = 0; OvLap.hEvent = CreateEvent (NULL,TRUE,FALSE,NULL); //Clear All sPort error ClearCommError (hSerial,&dwErrMask,&ComState); //Get The Bytes to read from buff iBytesToRead = min (2000,ComState.cbInQue); if ( 0 == iBytesToRead ) return FALSE; else; if ( FALSE == ReadFile (hSerial,InBuff,iBytesToRead,&dwBytesRead,&OvLap ) ) { if ( GetLastError () == ERROR_IO_PENDING ) { WaitForSingleObject (OvLap.hEvent,2000); PurgeComm (hSerial,PURGE_TXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR ); } else; } else; return (TRUE); } ///Write Comm BOOL WriteCom ( BYTE *szBuff,DWORD dwBytes ) { DWORD dwErrMask = 0 ; DWORD dwBytesWritten = 0; ZeroMemory ( &OvLap ,sizeof(OvLap) ); ZeroMemory ( &ComState,sizeof(ComState) ); OvLap.Offset = 0; OvLap.OffsetHigh = 0; OvLap.hEvent = CreateEvent (NULL,TRUE,FALSE,NULL); //Clear All sPort error ClearCommError (hSerial,&dwErrMask,&ComState); if ( FALSE == WriteFile ( hSerial,szBuff,dwBytes,&dwBytesWritten ,&OvLap ) ) { if ( GetLastError () == ERROR_IO_PENDING ) { WaitForSingleObject (OvLap.hEvent,2000) ; PurgeComm (hSerial,PURGE_TXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR ); } else; } else; return ( dwBytesWritten == dwBytes ); } TCHAR* Caps ( TCHAR *szStr ) { UINT i = 0; for ( i = 0 ; szStr[i] != '\0'; i ++ ) { if ( szStr[i] >= 'A' && szStr[i] <= 'Z' ) szStr[i] += 0x20; } return szStr; } ...展开收缩
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