ecgdatadlg.cpp

这是我自己写的关于串口通讯的小程序,适于两台PC机之间通过(交叉串口线)串口通讯.可以(自动或手动)发送数据、接收数据、保存数据。是调试串口和初步学习串口编程的好例子。其中还用到了典型的串口类

// ECGDataDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ECGData.h"
#include "ECGDataDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CECGDataDlg dialog

CECGDataDlg::CECGDataDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CECGDataDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CECGDataDlg)
	m_strPath = _T("C:\\ECGData");
	m_strPort = _T("");
	m_strReceive = _T("");	
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	bReceive = FALSE;
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CECGDataDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CECGDataDlg)
	DDX_Control(pDX, IDC_RECEIVEDATA, m_ctrlReceive);
	DDX_Control(pDX, IDC_EDIT_RECEIVE, m_Edit);
	DDX_Control(pDX, IDC_COMBO_PORT, m_combPort);
	DDX_Control(pDX, IDC_COMBO_STOPBITS, m_combStopBits);
	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_CBString(pDX, IDC_COMBO_PORT, m_strPort);
	DDX_Text(pDX, IDC_EDIT_RECEIVE, m_strReceive);
	DDX_Control(pDX, IDC_COMMCTRL, m_Com);
	DDX_Text(pDX, IDC_EDIT_PATH, m_strPath);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CECGDataDlg, CDialog)
	//{{AFX_MSG_MAP(CECGDataDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_OPENPORT, OnOpenport)
	ON_BN_CLICKED(IDC_RECEIVEDATA, OnReceivedata)
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
	ON_BN_CLICKED(IDC_CHANGEDIR, OnChangedir)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CECGDataDlg message handlers

BOOL CECGDataDlg::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_combPort.InsertString(0,_T("COM1"));
	m_combPort.InsertString(1,_T("COM2"));
    m_combPort.SetCurSel(0);

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

	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("2"));
	m_combStopBits.SetCurSel(0);
	hCom=NULL;
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

//主要是修改参数设置，以符合函数要求
void CECGDataDlg::OnOpenport() 
{
	if(m_Com.GetPortOpen())
		m_Com.SetPortOpen(FALSE);

	m_Com.SetCommPort(1);       //选择com1
	if( !m_Com.GetPortOpen())
		m_Com.SetPortOpen(TRUE);//打开串口
	else
		AfxMessageBox("cannot open serial port");

	m_Com.SetSettings("9600,n,8,1");//波特率9600，无校验，8个数据位，1个停止位
	m_Com.SetRThreshold(1); 
	//参数1表示每当串口接收缓冲区中有多于或等于1个字符时将引发一个接收数据的OnComm事件
	m_Com.SetInputMode(1);
	m_Com.SetInputLen(0);//设置当前接收区数据长度为0
	m_Com.GetInput();//先预读缓冲区以清除残留数据	
}

void CECGDataDlg::OnReceivedata() 
{
    // TODO: Add your control notification handler code here
	m_Com.GetInput();//先预读缓冲区以清除残留数据
	bReceive = !bReceive;
	if(bReceive)
		m_ctrlReceive.SetWindowText(_T("停止接收"));
	else
		m_ctrlReceive.SetWindowText(_T("开始接收"));
}

/*
//The follow code realize reading data from buffer when press the button
{
	// TODO: Add your control notification handler code here
	
	CString strRead;
	CString strTem;

	OVERLAPPED osRead;
	DWORD nToRead, nHaveRead;
	DWORD dwErrorFlags, dwRead;
	
	COMSTAT ComStat;
	if(hCom == NULL)
	{
		AfxMessageBox("读取数据失败，确认串口已经打开！");
		return;
    }	
	//ZeroMemory(&osRead, sizeof(osRead));
	memset(&osRead, 0, sizeof(osRead));
	osRead.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

	if(osRead.hEvent == NULL)
	{
		AfxMessageBox("创建事件对象失败！");
		return ;
	}

	ZeroMemory(&ComStat, sizeof(ComStat));
	if(!ClearCommError(hCom, &dwErrorFlags, &ComStat))
	{
		PurgeComm(hCom, PURGE_RXABORT | PURGE_RXCLEAR);
		return;
	}

	nToRead = ComStat.cbInQue;
	
	char sBuffer[1024];
	memset(&sBuffer, 0, 1024);
    
	dwRead = ReadFile(hCom, &sBuffer, nToRead, &nHaveRead, &osRead);
    
	if(nHaveRead <= 0)
	{
		AfxMessageBox("输入缓存空，读到的字节数为0！");
		return;
	}
	else if(dwRead)
	{
		GetOverlappedResult(hCom, &osRead,&nHaveRead,TRUE);
		strTem.Format("%d", nHaveRead);
		strRead = sBuffer;
		m_strReceive = strRead + "\r\n" +"读到的字节数为：" + strTem;

		UpdateData(FALSE);
	
	}
    
	CloseHandle(osRead.hEvent);
}
*/

void CECGDataDlg::OnClear() 
{
	// TODO: Add your control notification handler code here
	m_Edit.Clear();
	m_Edit.RedrawWindow();	
}

BEGIN_EVENTSINK_MAP(CECGDataDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CECGDataDlg)
	ON_EVENT(CECGDataDlg, IDC_COMMCTRL, 1 /* OnComm */, OnOnCommCommctrl, VTS_NONE)
	//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

void CECGDataDlg::OnOnCommCommctrl() 
{
	// TODO: Add your control notification handler code here
	VARIANT variant_inp;
	COleSafeArray safearray_inp;
	LONG len,k;
	BYTE rxdata[2048]; //设置BYTE数组 An 8-bit integerthat is not signed.
	CString strtemp;
	if(bReceive)
	{
		if(m_Com.GetCommEvent()==2)  //事件值为2表示接收缓冲区内有字符
		{
			variant_inp = m_Com.GetInput();    //读缓冲区
			safearray_inp = variant_inp;       //VARIANT型变量转换为ColeSafeArray型变量
			len=safearray_inp.GetOneDimSize(); //得到有效数据长度
			for(k=0;k<len;k++)
				safearray_inp.GetElement(&k,rxdata+k);//转换为BYTE型数组
			m_Edit.AppendData(rxdata,len);
			m_strReceive += "\r\n";
		}
	}
	UpdateData(FALSE); //更新编辑框内容
}

void CECGDataDlg::OnChangedir() 
{
	// TODO: Add your control notification handler code here
	CFileDialog dlg(TRUE, "", "", 
					OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT, 
					"Exe Files (*.exe)|*.exe|All Files (*.*)|*.*||", this);
    
	dlg.m_ofn.lpstrTitle = "选择保存数据文件";
	 
	if(dlg.DoModal() == IDOK)
	{
	    m_strPath = dlg.GetPathName();
		UpdateData(FALSE);
	}	
}