modemdlg.cpp

WINDOWS mscomm modem 编程

// ModemDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Modem.h"
#include "ModemDlg.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)
	//}}AFX_MSG_MAP
	
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CModemDlg dialog

CModemDlg::CModemDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CModemDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CModemDlg)
	m_strPhoneNum = _T("85773661");	
	m_strSend = _T("");
	m_bPortOpened = FALSE;  // 初始时串口未打开   
    m_bOnLine=FALSE;        // 初始MODEM未在线，离线状态
	m_bNewLine = FALSE;     // 显示时不自动换行
	m_bOnLine = FALSE;
	m_bSetTimer=FALSE;
	m_pThread = NULL;
    nStrLen = 0;  
	m_nBaud = 9600;
	m_nDataBits = 8;
	m_nParity = 0;
	m_nStopBits = 1;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_strPort[0] = _T("COM1");
	m_strPort[1] = _T("COM2");
}

void CModemDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CModemDlg)
	DDX_Control(pDX, IDC_EDIT_RECEIVE, m_editReceive);
	DDX_Control(pDX, IDC_EDIT_PHONENUM, m_editPhoneNum);
	DDX_Control(pDX, IDCANCEL, m_btnCancel);
	DDX_Control(pDX, IDC_EDIT_SEND, m_editSend);
	DDX_Control(pDX, IDC_BUTTON_SEND, m_btnSend);
	DDX_Control(pDX, IDC_BUTTON_OPENPORT, m_btnOpenPort);
	DDX_Control(pDX, IDC_BUTTON_DIAL, m_btnDial);
	DDX_Control(pDX, IDC_BUTTON_CLOSEPORT, m_btnClosePort);
	DDX_Control(pDX, IDC_COMBO_STOPBITS, m_combStopBits);
	DDX_Control(pDX, IDC_COMBO_PORT, m_combPort);
	DDX_Control(pDX, IDC_COMBO_PARITY, m_combParity);
	DDX_Control(pDX, IDC_COMBO_DATABITS, m_combDataBits);
	DDX_Control(pDX, IDC_COMBO_BAUD, m_combBaud);
	DDX_Text(pDX, IDC_EDIT_PHONENUM, m_strPhoneNum);
	DDX_Text(pDX, IDC_EDIT_SEND, m_strSend);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CModemDlg, CDialog)
	//{{AFX_MSG_MAP(CModemDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_OPENPORT, OnBtnOpenPort)
	ON_BN_CLICKED(IDC_BUTTON_CLOSEPORT, OnBtnClosePort)
	ON_BN_CLICKED(IDC_BUTTON_DIAL, OnBtnDial)
	ON_BN_CLICKED(IDC_BUTTON_SEND, OnBtnSend)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
	ON_MESSAGE(WM_COMMNOTIFY, OnCommNotify)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CModemDlg message handlers

BOOL CModemDlg::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
	m_btnClosePort.EnableWindow(FALSE);
	m_btnDial.EnableWindow(FALSE);
	m_btnSend.EnableWindow(FALSE);

    ghWnd=this->GetSafeHwnd();

	m_editReceive.SetReadOnly(TRUE);

	m_combPort.InsertString(0,_T("COM1"));
	m_combPort.InsertString(1,_T("COM2"));
    m_combPort.SetCurSel(1);

	m_combParity.InsertString(0,_T("NONE"));
	m_combParity.InsertString(1,_T("EVEN"));
	m_combParity.InsertString(2,_T("ODD"));
	m_combParity.SetCurSel(0);

	m_combDataBits.InsertString(0,_T("5"));
	m_combDataBits.InsertString(1,_T("6"));
	m_combDataBits.InsertString(2,_T("7"));
	m_combDataBits.InsertString(3,_T("8"));
	m_combDataBits.SetCurSel(3);	

	m_combBaud.InsertString(0,_T("300"));
	m_combBaud.InsertString(1,_T("600"));
	m_combBaud.InsertString(2,_T("1200"));
	m_combBaud.InsertString(3,_T("2400"));
	m_combBaud.InsertString(4,_T("9600"));
	m_combBaud.InsertString(5,_T("14400"));
	m_combBaud.InsertString(6,_T("19200"));
	m_combBaud.InsertString(7,_T("38400"));
	m_combBaud.InsertString(8,_T("57600"));
	m_combBaud.SetCurSel(4);

	m_combStopBits.InsertString(0,_T("1"));
	m_combStopBits.InsertString(1,_T("1.5"));
	m_combStopBits.InsertString(2,_T("2"));
	m_combStopBits.SetCurSel(0);

	// 为WM_COMMNOTIFY消息创建事件对象，手工重置，初始化为有信号的
	if((m_hPostMsgEvent=CreateEvent(NULL, TRUE, TRUE, NULL))==NULL)
		return FALSE;

	memset(&m_osRead, 0, sizeof(OVERLAPPED));
	memset(&m_osWrite, 0, sizeof(OVERLAPPED));

	// 为异步读创建事件对象，手工重置，初始化为无信号的
	if((m_osRead.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)
		return FALSE;

	// 为异步写创建事件对象，手工重置，初始化为无信号的
	if((m_osWrite.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)
		return FALSE;
    
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CModemDlg::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 CModemDlg::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 CModemDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CModemDlg::OnCancel() 
{
    //程序结束时删除线程、关闭串口的操作
	if(m_bPortOpened)
		OnBtnClosePort();

	// 删除事件句柄
	if(m_hPostMsgEvent)
		CloseHandle(m_hPostMsgEvent);

	if(m_osRead.hEvent)
		CloseHandle(m_osRead.hEvent);

	if(m_osWrite.hEvent)
		CloseHandle(m_osWrite.hEvent);
	
	CDialog::OnCancel();
}

BOOL CModemDlg::OnBtnOpenPort() 
{
	COMMTIMEOUTS TimeOuts;

	if(m_bPortOpened)
		return FALSE;

	// 异步方式打开串口
	m_hCom=CreateFile(m_strPort[m_combPort.GetCurSel()], GENERIC_READ | GENERIC_WRITE, 0, NULL,
		OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, 
		NULL); 

	if(m_hCom==INVALID_HANDLE_VALUE)
		return FALSE;

	SetupComm(m_hCom,MAXBLOCK,MAXBLOCK);
    SetCommMask(m_hCom,EV_RXCHAR);

	// 把间隔超时设为最大，把总超时设为0将导致ReadFile立即返回并完成操作
	TimeOuts.ReadIntervalTimeout=MAXDWORD; 
	TimeOuts.ReadTotalTimeoutMultiplier=0; 
	TimeOuts.ReadTotalTimeoutConstant=0; 

	/* 设置写超时以指定WriteComm成员函数中的GetOverlappedResult函数的等待时间*/
	TimeOuts.WriteTotalTimeoutMultiplier=50;
	TimeOuts.WriteTotalTimeoutConstant=2000;

	SetCommTimeouts(m_hCom, &TimeOuts);

	if(ConfigConnection())
	{

		m_pThread=AfxBeginThread(CommProc, this, THREAD_PRIORITY_NORMAL, 
			0, CREATE_SUSPENDED, NULL); // 创建并挂起线程

		if(m_pThread==NULL)
		{
			CloseHandle(m_hCom);
			return FALSE;
		}
		else
		{
			m_bPortOpened=TRUE;
			m_pThread->ResumeThread(); // 恢复线程运行
			m_btnOpenPort.EnableWindow(FALSE);
			m_btnClosePort.EnableWindow(TRUE);
			m_btnDial.EnableWindow(TRUE);
	        int k=0;
	        CString strTemp="ATS0=1\r";
	        nStrLen=strTemp.GetLength();
	        for(k=0;k<nStrLen;k++)
			{
	            buf[k]=strTemp.GetAt(k);
			}
	        WriteComm(buf,k);
		}
	}
	else
	{
		CloseHandle(m_hCom);
		return FALSE;
	}
	
	return TRUE;	
}

//串口配置函数，成功返回TRUE，失败返回FALSE
BOOL CModemDlg::ConfigConnection()
{
	DCB dcb;

	//得到串口当前配置
	if(!GetCommState(m_hCom, &dcb))
		return FALSE;

    m_nBaud=m_combBaud.GetCurSel();
	m_nDataBits=m_combDataBits.GetCurSel();
	m_nParity=m_combParity.GetCurSel();
	m_nStopBits=m_combStopBits.GetCurSel();

	dcb.fBinary=TRUE;
	switch(m_nBaud)//波特率（数据传输速率）
	{
	   case 0:
            dcb.BaudRate=300;
			break;
	   case 1:
		    dcb.BaudRate=600;
			break;
	   case 2:
            dcb.BaudRate=1200;
			break;
	   case 3:
		    dcb.BaudRate=2400;
			break;
	   case 4:
            dcb.BaudRate=9600;
			break;