gpsdlg.cpp

GPS数据获取 并处理 利用串口通讯 串口利用SerialPort

// 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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// 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)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CGPSDlg, CDialog)
	//{{AFX_MSG_MAP(CGPSDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_MESSAGE(WM_COMM_RXCHAR,OnComm)
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGPSDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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

	if(m_SerialPort.InitPort(this,1,4800,'N',8,1,EV_RXFLAG | EV_RXCHAR,1024))
	{
		m_SerialPort.StartMonitoring();
		m_bSerialPortOpened=true;
	}
	else
	{
		AfxMessageBox("没有发现此串口或被占用");
		m_bSerialPortOpened = false;
	}
	flag=0;
	n=0;
	longitude=0;
	longitudemin=0;
	longitudesec=0.0;
	latitude=0;
	latitudemin=0;
	latitudesec=0.0;

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

void CGPSDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// 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;
}
LONG CGPSDlg::OnComm(WPARAM ch,LPARAM port)
{
	if('$'==ch)
	{
		switch(flag)
		{
		case 0://没有任何有效数据
			flag=1;//新的一轮数据，启动标识判断阶段，开始计数
			n=0;
			break;
		case 2://有效数据，且后两位回车丢失
			flag=0;//返回数据无效状态
			str[n]='\0';
			compute(str);//str数据处理
			break;
		default:
			;
		}
	}
	else
	{
		switch(flag)
		{
		case 1://标识接受阶段
			str[n++]=ch;
			if(n>=5)//标识接收完毕
			{
				str[n]='\0';
				if(0==strcmp(str,"GPRMC"))
				{
					flag=3;//正确数据行
					n=0;
				}
				else
				{
					flag=0;
				}
			}
			break;
		case 3://正确数据接收阶段
			str[n++]=ch;
			if(n>=34)//34为有效数据个数
			{
				//数据接收完毕,处理数据,设置标志位,
				flag=0;
				str[n]='\0';
				compute(str);
			}
			break;
		default:
			;
		}
	}
//	MessageBox("zhw");
	return 0;
}

void CGPSDlg::compute(char *str)
{
	char temp[20];
	temp[0]='\0';
	strncat(temp,str+10,2);
	longitude=atoi(temp);
	temp[0]='\0';
	strncat(temp,str+12,2);
	longitudemin=atoi(temp);
	temp[0]='\0';
	strncat(temp,str+14,5);
	longitudesec=atof(temp);
	longitudesec*=60;
	temp[0]='\0';
	strncat(temp,str+22,3);
	latitude=atoi(temp);
	temp[0]='\0';
	strncat(temp,str+25,2);
	latitudemin=atoi(temp);
	temp[0]='\0';
	strncat(temp,str+27,5);
	latitudesec=atof(temp);
	latitudesec*=60;
}

void CGPSDlg::OnOK() 
{
	// TODO: Add extra validation here
//	m_SerialPort.WriteToPort("$PR$GPRMC,114008,V,3731.7661,N,12204.6816,E,0.000,0.0,040409,0.0,E*68\n\r$PR");
}