gpsdlg.cpp

GPS测试及接收通信程序

// GPSDlg.cpp : implementation file
//

#include "stdafx.h"
#include "GPS.h"
#include "GPSDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
extern CGPSApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CGPSDlg dialog

CGPSDlg::CGPSDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CGPSDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CGPSDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CGPSDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CGPSDlg)
	DDX_Control(pDX, IDC_COMBCMD, m_CombCmd);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CGPSDlg, CDialog)
	//{{AFX_MSG_MAP(CGPSDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_CMD, OnCmd)
	ON_BN_CLICKED(IDC_BIN, OnBin)
	ON_MESSAGE(WM_USER,OnMyMessage)
	ON_BN_CLICKED(IDC_NMEA, OnNmea)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGPSDlg message handlers
int OpenComm(); 
UINT ComReceiveTheadProc(LPVOID pParam);

BOOL CGPSDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	 OpenComm();
 	 AfxBeginThread(ComReceiveTheadProc, NULL,THREAD_PRIORITY_LOWEST);

	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CGPSDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CGPSDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


char gBuf[100];
LRESULT CGPSDlg::OnMyMessage(WPARAM wParam,LPARAM lParam)
{
	SetDlgItemText(IDC_GPSINFO,gBuf);
	int i,k;
	char buf[100],str[20],sumhex[3];
	char UTC[20],STA[3],Latitude[40],Longitude[40];
	unsigned char sum;
	CString str1;
	strcpy(buf,gBuf);
	sum=0;
	for(i=1;i<100;i++) {if(buf[i]=='*') break; sum^=buf[i];}
	sumhex[0]=(sum/16)>9 ? (sum/16)-10+0x41:sum/16+0x30;
	sumhex[1]=(sum&15)>9 ? (sum&15)-10+0x41:(sum&15)+0x30;
	sumhex[2]=0;
	str1.Format("%2X",sum);
	SetDlgItemText(IDC_SUM,sumhex);
	for(i=0;i<6;i++) str[i]=buf[i];
	str[6]=0;
	if((strcmp(str,"$GPRMC"))==0)
	{
		k=0;
		for(i=0;i<10;i++){if(buf[k++] == ',') break;}
		for(i=0;i<10;i++){ UTC[i]=buf[k]; if(buf[k++] == ',') break;}
		UTC[i]=0;
		STA[0]=buf[k];
		STA[1]=0;
//		for(i=0;i<10;i++){if(buf[k++] == ',') break;} k++;
		for(i=0;i<10;i++){if(buf[k++] == ',') break;}
		for(i=0;i<20;i++){ Latitude[i]=buf[k]; if(buf[k++] == ',') break;}
		Latitude[i]=0;
		for(i=0;i<10;i++){if(buf[k++] == ',') break;}
		for(i=0;i<20;i++){ Longitude[i]=buf[k]; if(buf[k++] == ',') break;}
		Longitude[i]=0;

		SetDlgItemText(IDC_UTC,UTC);
		SetDlgItemText(IDC_STA,STA);
		SetDlgItemText(IDC_LATITUDE,Latitude);
		SetDlgItemText(IDC_LONGITUDE,Longitude);
	}
	return 0;
}

HANDLE hCom;
DCB		Dcb;

void CGPSDlg::OnCmd() 
{
	DWORD Num;
	char buf[50];
	char cmd0[]="$PRWIILOG,???,V,,,\r\n";
	char cmd[][40]={"$PRWIILOG,RMC,A,T,1,0\r\n",
		"$PRWIILOG,GGA,A,T,2,0\r\n",
		"$PRWIILOG,GSV,A,T,2,0\r\n",
		"$PRWIILOG,GSA,A,T,2,0\r\n",
		"$PRWIILOG,ZCH,A,T,1,0\r\n",
		"$PRWIINIT,A, , , , , , , , , , , , ,\r\n",
		"$PRWIINIT,A, , , , , , , , , , , , ,\r\n"};

	char cr[]="\r\n";
    strcpy(buf,cmd0);
	WriteFile(hCom,buf,strlen(buf),&Num,NULL);

    strcpy(buf,cmd[m_CombCmd.GetCurSel()]);
//    strcpy(buf,"$PRWIILOG,GGA,A,T,1,0");
	WriteFile(hCom,buf,strlen(buf),&Num,NULL);
	if(m_CombCmd.GetCurSel()==6)
	{
		int i;
		for(i=0;i<5;i++)
		{
			strcpy(buf,cmd[i]);
			WriteFile(hCom,buf,strlen(buf),&Num,NULL);
		}
	}
}

UINT ComReceiveTheadProc(LPVOID pParam)
{
	unsigned char buf[100],buf1[2];
	UINT Msg=WM_USER;
	WPARAM wParam=NULL;
	LPARAM lParam=0;
	int i,num;
	bool rev$,LF;
	CString strm;
	DWORD Num1; 
	HWND hWnd=theApp.m_pMainWnd->m_hWnd;
	while(1)
	{
		num=0;
	    rev$=false;
		LF=false;
		while(!rev$)
		{
			Sleep(10);
		    ReadFile(hCom,buf1,1,&Num1,NULL);
			if(Num1==1 && buf1[0]=='$')rev$=true;  
		};
		buf[num++]=buf1[0];  
		while(!LF && num<80 )
		{
		    ReadFile(hCom,buf1,1,&Num1,NULL);
			if(Num1==1)
			{
				buf[num++]=buf1[0];  
				if(buf1[0]==0x0A) LF=true;
			}
		};

		if(LF)
		{
			for(i=0;i<num;i++) gBuf[i]=buf[i];
//			pView->PostMessage(Msg,wParam, lParam );
			PostMessage(hWnd,Msg,wParam, lParam );
		}
	}
//	HWND hWnd=(HWND)theApp.GetMainWnd();
	return 1;
}

int OpenComm() 
{
	hCom=CreateFile(
		"COM1",
		GENERIC_READ | GENERIC_WRITE,
		0,
		NULL,
		OPEN_EXISTING,
		0,
		NULL);
	if(hCom==INVALID_HANDLE_VALUE)
	{   
		char szMsg[40]="Can not open ";
		MessageBox(NULL,"COM1",szMsg,MB_OK );
		return 0;
	}
	GetCommState(hCom,&Dcb);
	Dcb.BaudRate=CBR_9600;
	Dcb.BaudRate=CBR_4800;
	Dcb.ByteSize=8;
	Dcb.Parity=NOPARITY;
	Dcb.StopBits=ONESTOPBIT;

	Dcb.fOutxCtsFlow=FALSE;
	Dcb.fOutxDsrFlow=FALSE; 
	Dcb.fDtrControl=DTR_CONTROL_ENABLE;
//	Dcb.fDtrControl=DTR_CONTROL_DISABLE;

	Dcb.fDsrSensitivity=FALSE; 
	Dcb.fRtsControl=RTS_CONTROL_ENABLE;

	Dcb.fNull=FALSE;
	SetCommState(hCom,&Dcb);

	COMMTIMEOUTS Timeouts;
	GetCommTimeouts(hCom,&Timeouts);
	Timeouts.ReadIntervalTimeout =100;
//	Timeouts.ReadTotalTimeoutMultiplier=2;
	Timeouts.ReadTotalTimeoutMultiplier=20;
	Timeouts.ReadTotalTimeoutConstant=20;
	Timeouts.WriteTotalTimeoutMultiplier=20;
	Timeouts.WriteTotalTimeoutConstant =200;
	SetCommTimeouts(hCom,&Timeouts);
	return 1;
}	




void CGPSDlg::OnBin() 
{
	DWORD Num;
	int i;
	char buf[50];
	char cr[]="\r\n";
    strcpy(buf,"$PRWIIPRO,,RBIN");
	strcat(buf,cr);
	WriteFile(hCom,buf,strlen(buf),&Num,NULL);
}

void CGPSDlg::OnNmea() 
{
	DWORD Num;
	int i;
	char buf[18],cmd[18];
	char cr[]="\r\n";
	union {
		unsigned short Word[5];
		unsigned char  byte[10];
	}Head;
	union{
		unsigned short Word[4];
		unsigned char  byte[8];
	}Data;
	char cmdx[]={0xFF,0x81, 0x33,5, 3,0, 0,7, 0xCB,0x71, 0,0, 0,0, 1,0, 0xFF,0xFF};
	unsigned short x,x1;
	x=0xFF81^0x533^3^0x700;
	x1=0x81FF+0x533+3+0x700;
	x=-x1;
	unsigned short w[4],sum;
	w[0]=0xFF81;
	w[1]=0x533;
	w[2]=3;
	w[3]=0x700;
	sum=0;
	for(i=0;i<4;i++) sum+=w[i];
	Head.Word[0]=0x81FF;
	Head.Word[1]=0x533;//1331;   /* ID proctocal=1331=0x533 */
	Head.Word[2]=3;		 /* count for the data */
	Head.Word[3]=0x700;
	Head.Word[4]=Head.Word[0]+Head.Word[1]+Head.Word[2]+Head.Word[3];
	if(Head.Word[4] != 32768) Head.Word[4]=-Head.Word[4];
	Data.Word[0]=0; 
	Data.Word[1]=0; 
	Data.Word[2]=1; 
	Data.Word[3]=Data.Word[0]+Data.Word[1]+Data.Word[2]; 
	Data.Word[3]=-Data.Word[3];
	for(i=0;i<10;i++) buf[i]=Head.byte[i];
	for(i=0;i<8;i++)  buf[10+i]=Data.byte[i];
	for(i=0;i<9;i++)
	{
		cmd[2*i]=buf[2*i+1];
		cmd[2*i+1]=buf[2*i];
	}
	WriteFile(hCom,cmdx,18,&Num,NULL);
}