int CSeries::SerOpen(int PortNo, char * param)
{
DCB dcb;
BOOL fRetVal ;
BYTE i,bSet;
DWORD dwError;
COMMTIMEOUTS to;
char baudr[128] = {0};
TCHAR DevName[10];
wsprintf(DevName,"\\\\.\\COM%01d",(int)PortNo);
SerClose();
if ((m_CommPort=CreateFile(DevName , GENERIC_READ | GENERIC_WRITE , 0 ,
NULL , OPEN_EXISTING , NULL , NULL )) == INVALID_HANDLE_VALUE)
{
return -1;
}
// set up DCB
memset(&dcb, 0, sizeof(dcb));
dcb.DCBlength = sizeof(dcb) ;
strcpy(baudr, (char *)param);
if(!BuildCommDCBA(baudr, &dcb))
{
SerClose();
return -1;
}
if(!SetCommState(m_CommPort, &dcb))
{
SerClose();
return(-1);
}
to.ReadIntervalTimeout = MAXDWORD;
to.ReadTotalTimeoutMultiplier = 0;
to.ReadTotalTimeoutConstant = 0;
to.WriteTotalTimeoutMultiplier = 0;
to.WriteTotalTimeoutConstant = 0;
if(!SetCommTimeouts(m_CommPort, &to) )
{
SerClose();
return(-1);
}
return 0;
}
static int COMM_CLOSE(SIO_INFO *s)
{
if (s!=NULL) {
if( s->fd!=BAD_FD ) {
SerReceiveFlush( s->fd, 0 );
SerSetReceiveBuffer( s->fd, NULL, 0 );
SerClose( s->fd );
}
s->fd=BAD_FD;
return(1);
} else {
return(-1);
}
}
static int COMM_OPEN(SIO_INFO *s, char *dev)
{
Err e;
UInt fd;
if( strcmp( dev, "1" ) ) return( BAD_FD );
e = SysLibFind("Serial Library", &fd );
if( e ) return( BAD_FD );
e = SerOpen( fd, 0, 9600 );
if( e==serErrAlreadyOpen ) {
SerClose( fd );
return( BAD_FD );
} else if( e==serErrBadParam ) {
return( BAD_FD );
}
return(fd);
}
int CSeries::SerOpen(int PortNo, long BaudRate, int Parity, int ByteSize)
{
CString MsgStr;
DCB dcb;
BOOL fRetVal ;
BYTE i,bSet;
DWORD dwError;
COMMTIMEOUTS to;
TCHAR DevName[10];
wsprintf(DevName,"\\\\.\\COM%01d",(int)PortNo);
SerClose();
if ((m_CommPort=CreateFile(DevName , GENERIC_READ | GENERIC_WRITE , 0 ,
NULL , OPEN_EXISTING , NULL , NULL )) == INVALID_HANDLE_VALUE)
{
return -1;
}
for(i=0; i<5; i++)
{
/*设置缓冲区大小*/
fRetVal = SetupComm(m_CommPort, MAX_BUFFER_IN ,MAX_BUFFER_OUT);
if (fRetVal)
{
break;
}
Sleep(100);
}
// purge any information in the buffer
PurgeComm(m_CommPort, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR );
// set up for overlapped I/O
GetCommTimeouts(m_CommPort, &to);
to.ReadIntervalTimeout = 0xFFFFFFFF;
to.ReadTotalTimeoutMultiplier =0;
to.ReadTotalTimeoutConstant =0;
to.WriteTotalTimeoutMultiplier =10;//10ms
to.WriteTotalTimeoutConstant =5000;//5000ms
SetCommTimeouts(m_CommPort, &to) ;
// set up DCB
dcb.DCBlength = sizeof(DCB) ;
for(i=0; i<5; i++)
{
fRetVal =GetCommState(m_CommPort, &dcb);
if (fRetVal)
{
break;
}
Sleep(100);
}
if (fRetVal == 0)
{
dwError = GetLastError();
CloseHandle(m_CommPort);
m_CommPort = INVALID_HANDLE_VALUE;
return -2;
}
dcb.BaudRate=BaudRate;
dcb.ByteSize=ByteSize;
dcb.Parity = Parity;
dcb.StopBits =ONESTOPBIT;//2009-10-29
// setup hardware flow control
#if 2
bSet = false;
dcb.fOutxDsrFlow = bSet ;
if (bSet)
dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
else
dcb.fDtrControl = DTR_CONTROL_ENABLE;
dcb.fOutxCtsFlow = bSet ;
if (bSet)
dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
else
dcb.fRtsControl = RTS_CONTROL_ENABLE;
// setup software flow control
bSet = false;
dcb.fInX = dcb.fOutX = bSet ;
dcb.XonLim = 100 ;
dcb.XoffLim = 100 ;
dcb.XonChar = XON;
dcb.XoffChar = XOFF;
dcb.fBinary = TRUE;
if (dcb.Parity == 0)
dcb.fParity = FALSE;
else
dcb.fParity = TRUE;
#else
/**/
dcb.fOutxCtsFlow = FALSE; // No CTS output flow control
dcb.fOutxDsrFlow = FALSE; // No DSR output flow control
dcb.fDtrControl = DTR_CONTROL_DISABLE;
// DTR flow control type
dcb.fDsrSensitivity = FALSE; // DSR sensitivity
dcb.fTXContinueOnXoff = TRUE; // XOFF continues Tx
dcb.fOutX = FALSE; // No XON/XOFF out flow control
dcb.fInX = FALSE; // No XON/XOFF in flow control
dcb.fErrorChar = FALSE; // Disable error replacement
dcb.fNull = FALSE; // Disable null stripping
dcb.fRtsControl = RTS_CONTROL_DISABLE;
// RTS flow control
dcb.fAbortOnError = FALSE; // 当串口发生错误，并不终止串口读写
#endif
// set up DCB
dcb.DCBlength = sizeof( DCB );
for(i=0; i<5; i++)
{
//Sleep(80);
fRetVal = SetCommState(m_CommPort, &dcb);
if (fRetVal) break;
Sleep(100);
}
if (fRetVal == 0)
{
dwError = GetLastError();
// an error occurred, try to recover
MsgStr.Format("<CE-%u>,Please Check ComPort", dwError);
MessageBox(NULL, MsgStr, "SetCommState", MB_OK);
CloseHandle(m_CommPort);
m_CommPort = INVALID_HANDLE_VALUE;
return -3;
}
GetCommState(m_CommPort, &dcb ) ;
// EscapeCommFunction(m_CommPort, SETDTR ) ;
PurgeComm(m_CommPort , PURGE_TXABORT | PURGE_RXABORT |
PURGE_TXCLEAR | PURGE_RXCLEAR ) ;
return 0;
}
