Window 95串口通讯函数集合

PURGE_R
XCLEAR);
CommTimeOuts.ReadIntervalTimeout=0xFFFFFFFF;
CommTimeOuts.ReadTotalTimeoutMultiplier=0;
CommTimeOuts.ReadTotalTimeoutConstant=1000;
CommTimeOuts.WriteTotalTimeoutMultiplier=0;
CommTimeOuts.WriteTotalTimeoutConstant=1000;
SetCommTimeouts(COMDEV(npGPSInfo),&CommTimeOuts);
}

fRetVal=SetupConnection();

if (fRetVal)
{ CONNECTED(npGPSInfo)=TRUE;
if
(NULL==(hCommWatchThread=CreateThread((LPSECURITY_ATTRIBUTES)NULL,

0,(LPTHREAD_START_ROUTINE)CommWatchProc,
(LPVOID)NULL,0,&dwThreadID)))
{ CONNECTED(npGPSInfo)=FALSE;
CloseHandle(COMDEV(npGPSInfo));
fRetVal=FALSE;
}
else
{ THREADID(npGPSInfo)=dwThreadID;
HTHREAD(npGPSInfo)=hCommWatchThread;
EscapeCommFunction(COMDEV(npGPSInfo),SETDTR);
}
}
else
{ CONNECTED(npGPSInfo)=FALSE;
CloseHandle(COMDEV(npGPSInfo));
}

SetCursor(hOldCursor);
return (fRetVal);
}

BOOL NEAR SetupConnection()
{ BOOL fRetVal;
DCB dcb;


if (!npGPSInfo) return(FALSE);

dcb.DCBlength=sizeof(DCB);

GetCommState(COMDEV(npGPSInfo),&dcb);

dcb.BaudRate=BAUDRATE(npGPSInfo);
dcb.ByteSize=BYTESIZE(npGPSInfo);
dcb.Parity=PARITY(npGPSInfo);
dcb.StopBits=STOPBITS(npGPSInfo);

dcb.fOutxDsrFlow=FALSE;
dcb.fDtrControl=DTR_CONTROL_ENABLE;

dcb.fOutxCtsFlow=FALSE;
dcb.fRtsControl=RTS_CONTROL_ENABLE;
dcb.fInX=dcb.fOutX=FALSE;
dcb.fBinary=TRUE;
dcb.fParity=TRUE;

fRetVal=SetCommState(COMDEV(npGPSInfo),&dcb);
return (fRetVal);
}

BOOL NEAR CloseConnection()
{
if (!npGPSInfo) return(FALSE);

CONNECTED(npGPSInfo)=FALSE;

SetCommMask(COMDEV(npGPSInfo),0);
while(THREADID(npGPSInfo)!=0);

EscapeCommFunction(COMDEV(npGPSInfo),CLRDTR);
PurgeComm(COMDEV(npGPSInfo),PURGE_TXABORT

关键词：Window 95串口通讯函数集合