?? gpsrecvdlg.cpp
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// GpsRecvDlg.cpp : implementation file
//
#include "stdafx.h"
#include "GpsRecv.h"
#include "GpsRecvDlg.h"
#include "PortSetting.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
UINT lpCommThreadProc(LPVOID lpParam);
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()
/////////////////////////////////////////////////////////////////////////////
// CGpsRecvDlg dialog
CGpsRecvDlg::CGpsRecvDlg(CWnd* pParent /*=NULL*/)
: CDialog(CGpsRecvDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CGpsRecvDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hPort = NULL;
m_pCommThread = NULL;
m_bExitThread = FALSE;
m_nPort = 1;
m_nBaud = 9600;
m_nParity = 0;
m_nStopBits = 0;
m_nDataBits = 8;
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CGpsRecvDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CGpsRecvDlg)
DDX_Control(pDX, IDC_GPS_DATA, m_Edit);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CGpsRecvDlg, CDialog)
//{{AFX_MSG_MAP(CGpsRecvDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_PORT_SETTING, OnPortSetting)
ON_BN_CLICKED(IDC_OPEN_PORT, OnOpenPort)
ON_BN_CLICKED(IDC_CLOSE_PORT, OnClosePort)
ON_MESSAGE(WM_RECVGPSDATA, OnRecvGpsData)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CGpsRecvDlg message handlers
BOOL CGpsRecvDlg::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
return TRUE; // return TRUE unless you set the focus to a control
}
void CGpsRecvDlg::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 CGpsRecvDlg::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 CGpsRecvDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CGpsRecvDlg::OnPortSetting()
{
CPortSetting PortSetting;
PortSetting.m_nPort = m_nPort;
PortSetting.m_nBaud = m_nBaud;
PortSetting.m_nDataBits = m_nDataBits;
PortSetting.m_nStopBits = m_nStopBits;
PortSetting.m_nParity = m_nParity;
if(PortSetting.DoModal() == IDOK)
{
m_nPort = PortSetting.m_nPort;
m_nBaud = PortSetting.m_nBaud;
m_nDataBits = PortSetting.m_nDataBits;
m_nStopBits = PortSetting.m_nStopBits;
m_nParity = PortSetting.m_nParity;
//如果串口處于打開狀態，則先關閉串口，再根據新參數打開串口
if(m_hPort)
{
OnClosePort();
OnOpenPort();
}
}
}
void CGpsRecvDlg::OnOpenPort()
{
if(m_hPort)
{
MessageBox(_T("串口已經打開!"));
return;
}
//打開串口
CString sPort;
sPort.Format(_T("\\\\.\\COM%d"), m_nPort);
m_hPort = CreateFile(sPort, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED, NULL);
if(m_hPort == INVALID_HANDLE_VALUE)
{
MessageBox("打開串口失敗!");
m_hPort = NULL;
return;
}
//設置緩沖區
SetupComm(m_hPort, 1024, 1024);
//配置串口
DCB ComDCB;
ComDCB.DCBlength = sizeof(DCB);
GetCommState(m_hPort, &ComDCB);
//改變缺省配置
ComDCB.BaudRate = m_nBaud;
ComDCB.ByteSize = m_nDataBits;
ComDCB.Parity = m_nParity;
ComDCB.StopBits = m_nStopBits;
SetCommState(m_hPort, &ComDCB);
//設置超時值
COMMTIMEOUTS ot;
memset(&ot, 0, sizeof(ot));
ot.ReadIntervalTimeout = MAXDWORD;
SetCommTimeouts(m_hPort, &ot);
//啟動接收線程
m_bExitThread = FALSE;
m_pCommThread = AfxBeginThread(lpCommThreadProc, this, THREAD_PRIORITY_NORMAL);
if(m_pCommThread)
m_pCommThread->m_bAutoDelete = TRUE;
else
{
MessageBox("啟動接收線程失敗!");
CloseHandle(m_hPort);
m_hPort = NULL;
return;
}
}
void CGpsRecvDlg::OnClosePort()
{
if(m_hPort == NULL)
{
MessageBox(_T("串口已經關閉!"));
return;
}
//設置結束接收線程標志
m_bExitThread = TRUE;
//使串口接收線程中的WaitCommEvent()函數返回
SetCommMask(m_hPort, 0);
//等待接收線程結束
WaitForSingleObject(m_pCommThread->m_hThread, INFINITE);
m_pCommThread = NULL;
//關閉串口
CloseHandle(m_hPort);
m_hPort = NULL;
}
void CGpsRecvDlg::OnOK()
{
if(m_hPort)
{
//設置結束接收線程標志
m_bExitThread = TRUE;
//使串口接收線程中的WaitCommEvent()函數返回
SetCommMask(m_hPort, 0);
//等待接收線程結束
WaitForSingleObject(m_pCommThread->m_hThread, INFINITE);
m_pCommThread = NULL;
//關閉串口
CloseHandle(m_hPort);
}
CDialog::OnOK();
}
UINT lpCommThreadProc(LPVOID lpParam)
{
CGpsRecvDlg *pWnd = (CGpsRecvDlg *)lpParam;
if(!pWnd || !pWnd->m_hPort) return 0;
BYTE RecvBuf[1024];
DWORD dwSpace, dwReadCount = 0, dwReturnCount;
DWORD dwError, dwEvtMask = 0;
COMSTAT cs;
OVERLAPPED overlapped;
memset(&overlapped, 0, sizeof(overlapped));
//創建一個人工復位事件對象
overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
//設置串口事件
SetCommMask(pWnd->m_hPort, EV_RXCHAR);
while(!pWnd->m_bExitThread)
{
//等待串口事件
WaitCommEvent(pWnd->m_hPort, &dwEvtMask, NULL);
if(dwEvtMask & EV_RXCHAR)
{
//獲取串口狀態
ClearCommError(pWnd->m_hPort, &dwError, &cs);
dwReadCount = cs.cbInQue;
if(dwReadCount <= 0) continue;
//獲取GPS數據緩沖區的剩余空間
dwSpace = (DWORD)pWnd->m_GpsBuf.GetDataBufSpace();
if(dwReadCount > dwSpace) dwReadCount = dwSpace;
//異步讀取數據
BOOL bReadStat = ReadFile(pWnd->m_hPort, RecvBuf, dwReadCount,
&dwReturnCount, &overlapped);
if(!bReadStat)
{
if(GetLastError() == ERROR_IO_PENDING)
{
while(!GetOverlappedResult(pWnd->m_hPort, &overlapped,
&dwReturnCount, FALSE))
{
dwError = GetLastError();
if(dwError == ERROR_IO_INCOMPLETE) continue;
}
}
}
//把讀取的數據放入GPS數據緩沖區
pWnd->m_GpsBuf.Write(RecvBuf, dwReturnCount);
//向主窗口發送消息
pWnd->PostMessage(WM_RECVGPSDATA, 0, 0);
}
}
CloseHandle(overlapped.hEvent);
PurgeComm(pWnd->m_hPort, PURGE_TXABORT|PURGE_RXABORT|PURGE_RXCLEAR|PURGE_TXCLEAR);
return 0;
}
void CGpsRecvDlg::OnRecvGpsData(WPARAM wp, LPARAM lp)
{
BYTE buf[1024];
int len;
CString strEditText, strTemp;
//從GPS數據緩沖區中讀取一條完整的數據
if(m_GpsBuf.Read(buf, len) == 1)
{
//將讀取地GPS原始數據顯示在編輯框中
strEditText.Format(_T("%s"), (char *)buf);
AddDataString(strEditText);
//當數據有效時，將解釋后地數據顯示在編輯框中
if(DealGpsData(buf, len) == 1)
{
strEditText.Format(_T("時間:%d-%d-%d %d:%d%d\r\n"), data.time.wYear,
data.time.wMonth, data.time.wDay, data.time.wHour,
data.time.wMinute, data.time.wSecond);
strTemp.Format(_T("經度:%.5f 緯度:%.5f\r\n"), data.longitude, data.latitude);
strEditText += strTemp;
strTemp.Format(_T("速度:%.2f 方位:%.2f\r\n"), data.speed, data.course);
strEditText += strTemp;
AddDataString(strEditText);
}
}
}
//解釋GPS數據
int CGpsRecvDlg::DealGpsData(BYTE *buf, DWORD len)
{
int index;
CString sData;
sData.Format(_T("%s"), buf);
index = sData.Find(_T(','));
if(index == -1) return 0;
sData = sData.Right(sData.GetLength() - index - 1);
//get UTC time
CString sLeft = sData.Left(2);
data.time.wHour = atoi(sLeft);
sData = sData.Right(sData.GetLength() - 2);
sLeft = sData.Left(2);
data.time.wMinute = atoi(sLeft);
sData = sData.Right(sData.GetLength() - 2);
sLeft = sData.Left(2);
data.time.wSecond = atoi(sLeft);
sData = sData.Right(sData.GetLength() - 3);
//get status
sLeft = sData.Left(1);
data.status = sLeft[0];
sData = sData.Right(sData.GetLength() - 2);
//get latitude
index = sData.Find(_T(','));
if(index == -1) return 0;
sLeft = sData.Left(index);
sData = sData.Right(sData.GetLength() - index - 1);
double lat = atof(sLeft);
data.latitude = long(lat/100) + (lat - long(lat/100)*100)/60;
//get latitude hemisphere
sLeft = sData.Left(1);
data.lat_hemi = sLeft[0];;
sData = sData.Right(sData.GetLength() - 2);
//get longitude
index = sData.Find(_T(','));
if(index == -1) return 0;
sLeft = sData.Left(index);
sData = sData.Right(sData.GetLength() - index - 1);
double lon = atof(sLeft);
data.longitude = long(lon/100) + (lon - long(lon/100)*100)/60;
//get longitude hemisphere
sLeft = sData.Left(1);
data.lon_hemi = sLeft[0];;
sData = sData.Right(sData.GetLength() - 2);
//get speed
index = sData.Find(_T(','));
if(index == -1) return 0;
sLeft = sData.Left(index);
sData = sData.Right(sData.GetLength() - index - 1);
data.speed = atof(sLeft);
//get course
index = sData.Find(_T(','));
if(index == -1) return 0;
sLeft = sData.Left(index);
sData = sData.Right(sData.GetLength() - index - 1);
data.course = atof(sLeft);
//get UTC data
sLeft = sData.Left(2);
data.time.wDay = atoi(sLeft);
sData = sData.Right(sData.GetLength() - 2);
sLeft = sData.Left(2);
data.time.wMonth = atoi(sLeft);
sData = sData.Right(sData.GetLength() - 2);
sLeft = sData.Left(2);
data.time.wYear = atoi(sLeft);
sData = sData.Right(sData.GetLength() - 3);
data.time.wDayOfWeek = 0;
data.time.wMilliseconds = 0;
//get magnetic degree
index = sData.Find(_T(','));
if(index == -1) return 0;
sLeft = sData.Left(index);
sData = sData.Right(sData.GetLength() - index - 1);
data.mag_degree = atof(sLeft);
//get direction
sLeft = sData.Left(1);
data.direction = sLeft[0];;
if(data.status != 'A')
{
return 0;
}
return 1;
}
void CGpsRecvDlg::AddDataString(LPCTSTR string)
{
int nTextLen = m_Edit.GetWindowTextLength();
//當編輯框中地字符長度大于2000時，將編輯框清空
if(nTextLen > 2000)
{
m_Edit.SetWindowText(_T(""));
nTextLen = 0;
}
m_Edit.SetSel(nTextLen, nTextLen);
m_Edit.ReplaceSel(string);
}
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