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if(!m_comm.GetPortOpen())
m_comm.SetPortOpen(TURE); /*´ò¿ª´®¿Ú
m_comm.SetSettings("4800,n,8,1"); /*´®¿Ú²ÎÊýÉèÖÃ
m_comm.SetInputMode(0); /*ÉèÖÃTEXT»º³åÇøÊäÈ뷽ʽ
m_comm.SetRthresHold(1); /*ÿ½ÓÊÕÒ»¸ö×Ö·ûÔò¼¤·¢OnComm()ʼþ
½ÓÊÕÊý¾Ý
m_comm.SetInputLen(1); /*ÿ´Î¶ÁÈ¡Ò»¸ö×Ö·û
VARINAT V1=m_comm.GetInput(); /*¶ÁÈë×Ö·û
m_V1=V1.bstrval;
·¢ËÍ×Ö·û
m_comm.SetOutput(COlevariant("Hello");/*·¢ËÍ"Hello"
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È· ¶¨ ͨ Ѷ ¿Ú µØ Ö·£ºint PORT=0x2F8;
½Ó ÊÕ ×Ö ·û ×Ó ³Ì Ðò£º
char near readbyte(void)
{
int time_limit;
char sta;
time_limit=5000;
while ((sta=inp(PORT+5) & 0x01) !=1)
{ time_limit--;
if (time_limit==0) {
/*printf("s=%4xm ",sta);*/return 0;}
}
return inp(PORT);
printf("%s",inp(PORT));
}
·¢ ËÍ ×Ö ·û ×Ó ³Ì Ðò£º
void sendbyte(unsigned char sdata)
{
long int time_limit;
time_limit=50000;
while ((inp(PORT+5) & 0xf0) != 0x60)
{ time_limit--;
if (time_limit==0) break;
}
outp(PORT,sdata);
}
´® ¿Ú ³õ ʼ »¯ ×Ó ³Ì Ðò£º
void init_com(PORT)
{
char i;
outp(PORT+3,0x80);
outp(PORT ,0x0C); /* baud rate 9600 */
outp(PORT+1,0);
/*8bit 1stop no even */
outp(PORT+3 ,0x3a);
outp(PORT+3 ,0x03);
i=inp(PORT+5) & 0xfe;
outp(PORT+5,i);
}
×Ö ·û ´® ·¢ ËÍ ×Ó ³Ì Ðò£º
void sendstrn(char *mess)
{
for (; *mess; mess++)
sendbyte(*mess);
sendbyte(0X0D);
/*sendbyte(0X0A); */
}
¼ò µ¥ µÄ Ö÷ ³Ì Ðò£º
init_com(ox2f8);
sendstrn(PORT,"FUNC");
j=0;
line=0;
do {
for(i=0;i<25;i++) ttemp[i]="\0" ; if(readbyte(PORT)="='M')" { i="0;" do { ttemp[i]="readbyte(PORT);" i++; }
while((ttemp[i-2]!="13)&&(ttemp[i-1]!=10));" line++; dcqd.TextOut(450,line*20+180,ttemp);} j++;}
while((j< 1000)&&(line< 5)); Wed, 16 Sep 1998 "acejet" < cejet@public1.ptt.js.cn>
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win16 win32 ×÷ÓÃ
OpenComm CreateFile £¨´ò¿ªÍ¨ÐÅ¿Ú£©£»
BuildCommDCB BuildCommDCB £¨Ìî³äDCBÊý¾Ý½á¹¹£©£»
SetCommState SetCommStae £¨ÉèÖÃͨÐÅ¿Ú״̬£©£»
FlushComm PurgeComm £¨Çå³ýͨÐŽÓÊÕ»ò·¢ËÍ»º³åÇø£©£»
GetCommError ClearCommError
£¨»Ö¸´»òÈ¡µÃͨÐÅ¿ÚµÄ״̬£©£»
ReadComm ReadFile £¨´ÓͨÐŽÓÊÕ»º³åÇø¶Á×Ö·û£©£»
WriteComm WriteFile £¨ÏòͨÐÅ·¢ËÍ»º³åÇøд×Ö·û£©£»
CloseComm CloseHandle £¨¹Ø±ÕͨÐÅ¿Ú£©£»
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---- 2:WINDOWS ¶¨ ʱ Æ÷
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---- WINDOWS µÄWM_ TIMER Ïû Ï¢ ÓëBIOS µÄ08H¡¢1CH ²» ͬ£¬ ´« ͳ µÄPC פ Áô ³Ì Ðò µØ ½Ó ÊÕ µ½08H ÖÐ ¶Ï ºÍ1CH ÖÐ ¶Ï£¬
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---- 3:WINDOWS ÖÐ Àû Óà ¶¨ ʱ Æ÷ ¿Ø ÖÆ ´® ¿Ú ͨ ÐÅ
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---- 4.WINDOWS ͨ Њʵ Àý
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±à³Ì»·¾³£ºBORLANDC C++5.0,WINDOWS `95
//======================================
// FUNCTION: short InitCom()
// PURPOSE: init com1
// RETURN VALUE:
// 1-------No error
// 0-------init Error
//======================================
short InitCom()
{
if(com_select==1)
{
IDCommDevice=CreateFile("COM1",
GENERIC_READ|GENERIC_WRITE,
0,NULL,OPEN_EXISTING,0,NULL);
if(IDCommDevice==INVALID_HANDLE_VALUE)
{
MessageBox(hWnd,"OPenComm error","info",MB_OK);
CloseHandle(IDCommDevice);
return 0;
}
BuildCommDCB("COM1:9600,N,8,1",&dCB);
}else
{
IDCommDevice=CreateFile("COM2",
GENERIC_READ|GENERIC_WRITE,
0,NULL,OPEN_EXISTING,0,NULL);
if(IDCommDevice==INVALID_HANDLE_VALUE)
{
MessageBox(hWnd,"OPenComm error","info",MB_OK);
CloseHandle(IDCommDevice);
return 0;
}
BuildCommDCB("COM2:9600,N,8,1",&dCB);
}
if (SetCommState(IDCommDevice,&dCB)<0) { MessageBox(hWnd,"Read SET CommState error","info",MB_OK);
CloseHandle(IDCommDevice); return 0; } if(!PurgeComm(IDCommDevice,PURGE_RXCLEAR))
{ MessageBox(hWnd,"IN buffer flush error","info",MB_OK); CloseHandle(IDCommDevice); return 0; }
if(!PurgeComm(IDCommDevice,PURGE_TXCLEAR)) { MessageBox(hWnd,"OUT buffer flush error","info",MB_OK);
CloseHandle(IDCommDevice); return 0; } return 1; } . . . .
/****************************************** Function:JKTWndProc(HWND hDlg,UINT message, WPARAM wParam,LPARAM lParam)
Purpose: ´¦Àí½»»»»úµÄÐÅÏ¢ Message: WM_INITDIALOG---¶Ô»°¿ò³õ»¯ WM_COMMAND------ËùÓжԴ°¿ÚµÄ²Ù×÷
**********************************************/
#pragma argsused LRESULT CALLBACK JKTWndProc(HWND hDlg, UINT message, UINT wParam, LONG lParam) {
LPDWORD num; short sign; char *temp_char; short x; BOOL lresult; int t_com; hdlg="hDlg;" switch (message)
{ case WM_TIMER: switch(LOWORD(wParam)) { case TIMER_REC: ClearCommError(IDCommDevice, &lpErrors,&ComStat);
if(ComStat.cbInQue!="0)" PostMessage(hDlg,WM_COMMAND ,IDP_DEALDATA,0L); break; } return 0;
case WM_COMMAND: switch(LOWORD(wParam)) { case IDP_DEALDATA: //´¦Àí½»»»»ú·¢µÄÐÅÏ¢
for(t_com="0;t_com<" ComStat.cbInQue;t_com++)
{ num="0;" l result="ReadFile(IDCommDevice£¬" temp_char,1,&n um,&lpOverlapped); temp_char++; }
return 0; case IDBEGIN: //¿ªÊ¼¹¤×÷ sign="InitCom(hDlg);" if(sign="=0)"
{ MessageBox(hDlg,"´®¿ÚÉèÖÃʧ°Ü!","Information",MB_OK); return 0; }
i SetTimer(hDlg,TIMER_REC,20,NULL); return 0; } break; } return (0); } . . . . .
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#include "StdAfx.h"
#define GWL_PGPSINFO 0
#define GPSEXTRABYTES sizeof( LONG )
#define MAXPORTS 4
#define CN_SEND WM_USER+100
#define RXQUEUE 4096
#define TXQUEUE 4096
// cursor states
#define CS_HIDE 0x00
#define CS_SHOW 0x01
// Flow control flags
#define FC_DTRDSR 0x01
#define FC_RTSCTS 0x02
#define FC_XONXOFF 0x04
// ascii definitions
#define ASCII_BEL 0x07
#define ASCII_BS 0x08
#define ASCII_LF 0x0A
#define ASCII_CR 0x0D
#define ASCII_XON 0x11
#define ASCII_XOFF 0x13
// data structures
typedef struct tagGPSINFO
{
HANDLE idComDev;
BYTE bPort;
BOOL fConnected;
BYTE bByteSize,bParity,bStopBits;
DWORD dwBaudRate;
HANDLE hPostEvent,hWatchThread,hWatchEvent;
HWND hTermWnd;
DWORD dwThreadID;
OVERLAPPED osWrite,osRead;
} GPSINFO, *PGPSINFO ;
#define COMDEV( x ) (x -> idComDev)
#define PORT( x ) (x -> bPort)
#define CONNECTED( x ) (x -> fConnected)
#define BYTESIZE( x ) (x -> bByteSize)
#define PARITY( x ) (x -> bParity)
#define STOPBITS( x ) (x -> bStopBits)
#define BAUDRATE( x ) (x -> dwBaudRate)
#define POSTEVENT( x ) (x -> hPostEvent)
#define HTHREAD( x ) (x -> hWatchThread)
#define THREADID( x ) (x -> dwThreadID)
#define WRITE_OS( x ) (x -> osWrite)
#define READ_OS( x ) (x -> osRead)
// function prototypes (private)
LRESULT NEAR CreateGPSInfo(HWND,BYTE nPort=1);
BOOL NEAR DestroyGPSInfo();
int NEAR ReadCommBlock(LPSTR,int);
BOOL NEAR WriteCommBlock(LPSTR,DWORD);
BOOL NEAR OpenConnection();
BOOL NEAR SetupConnection();
BOOL NEAR CloseConnection();
// function prototypes (public)
DWORD FAR PASCAL CommWatchProc(LPSTR);
¾ßÌåʵÏÖÇë¿´ÏÂÎÄ(ΪÁËÕâÎÄÕ£¬ÎÒ¶¼¶ÎÏß2´ÎÁË)
CPPʵÏÖ²¿·Ö£º
#include "StdAfx.h"
#include "Com.h"
HWND hGPSWnd=NULL;
PGPSINFO npGPSInfo=NULL;
LRESULT NEAR CreateGPSInfo(HWND hWnd,BYTE nPort)
{
if (NULL==(npGPSInfo=(PGPSINFO)LocalAlloc(LPTR,sizeof(GPSINFO))))
return ((LRESULT)-1) ;
hGPSWnd=hWnd;
COMDEV(npGPSInfo)=0;
CONNECTED(npGPSInfo)=FALSE;
PORT(npGPSInfo)=nPort;
BAUDRATE(npGPSInfo)=CBR_9600;
BYTESIZE(npGPSInfo)=8;
PARITY(npGPSInfo)=NOPARITY;
STOPBITS(npGPSInfo)=ONESTOPBIT;
WRITE_OS(npGPSInfo).Offset=0;
WRITE_OS(npGPSInfo).OffsetHigh=0;
READ_OS(npGPSInfo).Offset=0;
READ_OS(npGPSInfo).OffsetHigh=0;
// create I/O event used for overlapped reads / writes
READ_OS(npGPSInfo).hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
if (READ_OS(npGPSInfo).hEvent==NULL)
{ LocalFree( npGPSInfo ) ;
return ( -1 ) ;
}
WRITE_OS(npGPSInfo).hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
if (NULL==WRITE_OS(npGPSInfo).hEvent)
{ CloseHandle(READ_OS(npGPSInfo).hEvent);
LocalFree(npGPSInfo) ;
return (-1) ;
}
return ( (LRESULT) TRUE ) ;
}
BOOL NEAR DestroyGPSInfo()
{
if (!npGPSInfo) return (FALSE);
if (CONNECTED(npGPSInfo)) CloseConnection();
CloseHandle(READ_OS(npGPSInfo).hEvent);
CloseHandle(WRITE_OS(npGPSInfo).hEvent);
CloseHandle(POSTEVENT(npGPSInfo));
LocalFree(npGPSInfo);
return (TRUE);
}
BOOL NEAR OpenConnection()
{
char szPort[15];
BOOL fRetVal;
HCURSOR hOldCursor,hWaitCursor;
HANDLE hCommWatchThread;
DWORD dwThreadID;
COMMTIMEOUTS CommTimeOuts;
if (!npGPSInfo) return (FALSE);
hWaitCursor=LoadCursor(NULL,IDC_WAIT) ;
hOldCursor=SetCursor(hWaitCursor) ;
wsprintf(szPort,"COM%d",PORT(npGPSInfo));
if
((COMDEV(npGPSInfo)=CreateFile(szPort,GENERIC_READ|GENERIC_WRITE,
0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,
NULL))==(HANDLE)-1)
return ( FALSE ) ;
else
{ SetCommMask(COMDEV(npGPSInfo),EV_RXCHAR);
SetupComm(COMDEV(npGPSInfo),4096,4096);
PurgeComm(COMDEV(npGPSInfo),PURGE_TXABORT|PURGE_RXABORT|PURGE_TXCLEAR|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|PURGE_RXABORT|
PURGE_TXCLEAR|PURGE_RXCLEAR);
CloseHandle(COMDEV(npGPSInfo));
return (TRUE);
}
int NEAR ReadCommBlock(LPSTR lpszBlock,int nMaxLength)
{
BOOL fReadStat ;
COMSTAT ComStat ;
DWORD dwErrorFlags;
DWORD dwLength;
DWORD dwError;
if (!npGPSInfo) return(FALSE);
ClearCommError(COMDEV(npGPSInfo),&dwErrorFlags,&ComStat);
dwLength=min((DWORD)nMaxLength,ComStat.cbInQue);
if (dwLength>0)
{ fReadStat=ReadFile(COMDEV(npGPSInfo),lpszBlock,
dwLength,&dwLength,&READ_OS(npGPSInfo));
if (!fReadStat)
{ if (GetLastError()==ERROR_IO_PENDING)
{ OutputDebugString("\n\rIO Pending");
while(!GetOverlappedResult(COMDEV(npGPSInfo),&READ_OS(npGPSInfo),&dwLength,TR
UE))
{ dwError=GetLastError();
if(dwError == ERROR_IO_INCOMPLETE)
continue;
}
}
else
{ dwLength=0;
ClearCommError(COMDEV(npGPSInfo),&dwErrorFlags,&ComStat);
}
}
}
return ( dwLength ) ;
}
BOOL NEAR WriteCommBlock(LPSTR lpByte,DWORD dwBytesToWrite)
{ BOOL fWriteStat;
DWORD dwBytesWritten;
DWORD dwErrorFlags;
DWORD dwError;
COMSTAT ComStat;
if (!npGPSInfo) return(FALSE);
fWriteStat=WriteFile(COMDEV(npGPSInfo),lpByte,dwBytesToWrite,
&dwBytesWritten,&WRITE_OS(npGPSInfo));
if (!fWriteStat)
{ if(GetLastError()==ERROR_IO_PENDING)
{ while(!GetOverlappedResult(COMDEV(npGPSInfo),
&WRITE_OS(npGPSInfo),&dwBytesWritten,TRUE))
{ dwError=GetLastError();
if(dwError == ERROR_IO_INCOMPLETE)
continue;
else
{
ClearCommError(COMDEV(npGPSInfo),&dwErrorFlags,&ComStat);
break;
}
}
}
else
{
ClearCommError(COMDEV(npGPSInfo),&dwErrorFlags,&ComStat);
return ( FALSE );
}
}
return ( TRUE ) ;
}
DWORD FAR PASCAL CommWatchProc(LPSTR)
{ DWORD dwEvtMask;
OVERLAPPED os;
int nLength;
BYTE abIn[1024];
memset(&os,0,sizeof(OVERLAPPED));
// create I/O event used for overlapped read
os.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
if (os.hEvent==NULL)
{ MessageBox(NULL,"Failed to create event for thread!","GPS
Error!",MB_ICONEXCLAMATION|MB_OK);
return ( FALSE ) ;
}
if (!SetCommMask(COMDEV(npGPSInfo),EV_RXCHAR)) return (FALSE);
while (CONNECTED( npGPSInfo))
{ dwEvtMask=0 ;
WaitCommEvent(COMDEV(npGPSInfo),&dwEvtMask,NULL);
if ((dwEvtMask&EV_RXCHAR)==EV_RXCHAR)
{ do
{ if
(nLength=ReadCommBlock((LPSTR)abIn,1024))
{
//WriteCommBlock((LPSTR)abIn,nLength );
*(abIn+nLength)=0;
::SendMessage(hGPSWnd,CN_SEND,nLength,(LONG)(LPSTR)abIn);
}
}
while ((nLength>0)&&(CONNECTED( npGPSInfo)));
}
}
CloseHandle(os.hEvent);
THREADID(npGPSInfo)=0;
HTHREAD(npGPSInfo)=NULL;
return(TRUE);
}
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CreateGPSInfo(±»Í¨ÖªµÄ´°¿Ú¾ä±ú£¬´®¿Ú¶Ë¿ÚºÅ1»ò2);
OpenConnection();//½¨Á¢Áª½áËü»áµ÷ÓÃSetupConnection
DestroyGPSInfo();//½â³ýÁª½áËü»áµ÷ÓÃCloseConnection
¿ÉÒÔÓÃReadCommBlock/WriteCommBlockÀ´¶Á/д´®¿Ú
CommWatchProcÊǼàÊÓ´®¿ÚµÄỊ̈߳¬ÓÉOpenConnection½¨Á¢
µ±´®¿ÚÓÐÊý¾ÝÀ´µÄʱºî£¬Ëü»á֪ͨ'±»Í¨ÖªµÄ´°¿Ú¾ä±ú'µÄ´°¿ÚÊý¾Ý´«µ½µÄÏûÏ¢(×Ô¶¨ÒåµÄ)
SendMessage(hGPSWnd,CN_SEND,nLength,(LONG)(LPSTR)abIn);
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