showgpsentrydlg.cpp

对GPS信号进行解析

// ShowGPSEntryDlg.cpp : implementation file
//

#include "stdafx.h"

#include "ShowGPS.h"
#include "ShowGPSEntryDlg.h"

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

TCHAR* tbl_Port[3] = {_T("COM2"), _T("COM3"), _T("COM4")};
BYTE buf[500];
extern CString strCom;
/////////////////////////////////////////////////////////////////////////////
// CShowGPSEntryDlg dialog


CShowGPSEntryDlg::CShowGPSEntryDlg(CWnd* pParent /*=NULL*/)
	: TDialog(CShowGPSEntryDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CShowGPSEntryDlg)
		// NOTE: the ClassWizard will add member initialization here
         
	//}}AFX_DATA_INIT
	m_hStart = m_hStop = NULL;
	strCom = _T("COM4");	
}


void CShowGPSEntryDlg::DoDataExchange(CDataExchange* pDX)
{
	TDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CShowGPSEntryDlg)
	DDX_Control(pDX, IDC_BUTTONEXE, m_btn);
	DDX_Control(pDX, IDC_LISTGPS, m_listBox);
	DDX_Control(pDX, IDC_COMBO, m_Port);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CShowGPSEntryDlg, TDialog)
	//{{AFX_MSG_MAP(CShowGPSEntryDlg)
	ON_BN_CLICKED(IDC_BUTTONEXE, OnButtonexe)
	ON_BN_CLICKED(IDC_BUTTON, OnButton)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CShowGPSEntryDlg message handlers

BOOL CShowGPSEntryDlg::OnInitDialog() 
{
	TDialog::OnInitDialog();
	
	// TODO: Initialize dialog contents.
	for(int i=0;i<3;i++) m_Port.AddString(tbl_Port[i]);
	int sel = m_Port.FindString(0, strCom);
	if(sel == CB_ERR) m_Port.SetCurSel(2);
	else m_Port.SetCurSel(sel);
//	UpdateData(false);
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void CShowGPSEntryDlg::OnButtonexe() 
{
	// TODO: Add your control notification handler code here
	unsigned short ch[10];
	m_btn.GetWindowText(ch,10);
	CString str1(ch);
//	m_btn.GetWindowText((LPTSTR)str1,10);
	if (!str1.Compare(_T("show")))
	{
		m_btn.SetWindowText(_T("stop"));
		//UpdateWindow();
		Report.Debug(_T("ShowGPS 1"));
		m_Port.GetLBText(m_Port.GetCurSel(),strCom);
	    Start(strCom);
	}
	else
	{
		m_btn.SetWindowText(_T("show"));
		Report.Debug(_T("ShowGPS 2"));
	//	UpdateWindow();
		Stop();
	}
	
}

void CShowGPSEntryDlg::OnOK() 
{
	// TODO: Add extra validation here
	m_Port.GetLBText(m_Port.GetCurSel(),strCom);
	TDialog::OnOK();
}

void CShowGPSEntryDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	TDialog::OnCancel();
}

UINT CShowGPSEntryDlg::GPSThread(LPVOID pParam)
{
	Report.Debug(_T("ShowGPS: Thread started"));
	
//	CListBox *pLstBox;
//	pLstBox=(CListBox*)pParam;
	
//	GPSControl* pMSET = (GPSControl*)pParam;
	CShowGPSEntryDlg *mdlg=(CShowGPSEntryDlg*)pParam;
	
	DWORD dwEvtMask, dwError;
	COMSTAT ComStat;
	
	SetCommMask(mdlg->Port.GetHandle(), EV_RXCHAR);		
	
	while(true)
	{
		PowerMgr.SetSpeed(TPowerMgr::pwr_Minute);
		WaitCommEvent(mdlg->Port.GetHandle(), &dwEvtMask, NULL);
		PowerMgr.SetSpeed(TPowerMgr::pwr_Fast);
		if(PowerMgr.WaitForSingleObject(mdlg->m_hStop, 0) == WAIT_OBJECT_0)
		{
			Report.Debug(_T("ShowGPS: Receive stop event"));
			break;
		}
		if((dwEvtMask & EV_RXCHAR))
		{
			ClearCommError(mdlg->Port.GetHandle(), &dwError, &ComStat);
			//			Report.Debug(_T("MSET: Receive active"));
			if(mdlg->Port.NumberBytesInputBuffer())
			{
				
				int nRcvBytes =mdlg->Port.GetStr(buf,499);
				CString s,ss;
				for(int i=0;i<nRcvBytes;i++)
				{  
					s.Format(_T("%c"), buf[i]);						
					ss+=s;
					if(buf[i+1]=='$')
					{
					//	mdlg->m_listBox.AddString(ss);
						if (100==mdlg->m_listBox.GetCount())
						{
					//		mdlg->m_listBox.DeleteString(mdlg->m_listBox.GetTopIndex());              
						}
						mdlg->m_listBox.SetTabStops();
						s="";
					}					
				}				
				Report.Debug(_T("MSet: received bytes: %d"), nRcvBytes);
				Report.Debug(_T("MSet: received str:\n\r%s"), ss);
			}
		
		}
	}
	Report.Debug(_T("ShowGPS: Thread terminated"));
	
	return 0;
}

bool CShowGPSEntryDlg::Start(CString strCom)
{
    Report.Debug(_T("ShowGPS Com Set!"));
	strCom.Format(_T("%s:"), strCom);
	Port.SetCommPort(strCom);
	
	COMMTIMEOUTS CommTimeouts;
	CommTimeouts.ReadIntervalTimeout = 10;
	CommTimeouts.ReadTotalTimeoutMultiplier = 0;
	CommTimeouts.ReadTotalTimeoutConstant = 200;
	CommTimeouts.WriteTotalTimeoutMultiplier = 0;
	CommTimeouts.WriteTotalTimeoutConstant = 0;
	Port.SetTimeouts(CommTimeouts);
	Port.SetConfiguration(CBR_9600, 8, NOPARITY, ONESTOPBIT, false);
	
	if(!Port.OpenComm())
	{
		Report.Debug(_T("ShowGPS: failed to open port when initializing"));
		return false;
	}	
	
	m_hStop = CreateEvent(NULL, true, false, NULL);
	
	CWinThread* pThrd = AfxBeginThread(GPSThread, this);   
	if(pThrd)
	{
		m_hStart = pThrd->m_hThread;
		Report.Debug(_T("ShowGPS thread start at %s"), strCom);
		return true;
	}
	else Report.Debug(_T("ShowGPS thread failed to start"));
	
	return false;
}

bool CShowGPSEntryDlg::Stop()
{
	Report.Debug(_T("ShowGPS 3"));
	if(m_hStart)
	{
		SetEvent(m_hStop);
		PowerMgr.Sleep(500);
		SetCommMask(Port.GetHandle(), NULL);
		DWORD dwRet = PowerMgr.WaitForSingleObject(m_hStart, 20000);
		if(dwRet != WAIT_OBJECT_0)
		{
			Report.Debug(_T("ShowGPS 4"));
			DWORD dwExitCode;
			GetExitCodeThread(m_hStart, &dwExitCode);
			TerminateThread(m_hStart, dwExitCode);
		}
		m_hStart = NULL;
	}
	CloseHandle(m_hStop);
	if(Port.IsOpen())
	{
		Port.CloseComm();
	}
	return true;
}

void CShowGPSEntryDlg::OnButton() 
{
	// TODO: Add your control notification handler code here
	Stop();
}