scommdlg.cpp

十分好用的串口通讯代码（Active控件）

// SCommDlg.cpp : implementation file
/*****************************************************************
串口测试程序
张玉欣
2005.6
******************************************************************/

#include "stdafx.h"
#include "SComm.h"
#include "SCommDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CSCommDlg dialog

CSCommDlg::CSCommDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSCommDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSCommDlg)
	m_strTXData = _T("");
	m_strRXData = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSCommDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSCommDlg)
	DDX_Control(pDX, IDC_MSCOMM, m_ctrlComm);
	DDX_Text(pDX, IDC_EDIT_TXDATA, m_strTXData);
	DDX_Text(pDX, IDC_EDIT_RXDATA, m_strRXData);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSCommDlg, CDialog)
	//{{AFX_MSG_MAP(CSCommDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_MANUALSEND, OnManualSend)
	ON_BN_CLICKED(IDC_BUTTON_CLEARRX, OnClearRecvBox)
	ON_BN_CLICKED(IDC_BUTTON_CLEARTX, OnClearSendBox)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSCommDlg message handlers

BOOL CSCommDlg::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
	//Zhang 2005.6.17
	if(m_ctrlComm.GetPortOpen())
		m_ctrlComm.SetPortOpen(FALSE);

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

	m_ctrlComm.SetSettings("9600,n,8,1"); //波特率9600，无校验，8个数据位，1个停止位
	m_ctrlComm.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_ctrlComm.SetInputLen(0);  //设置当前接收区数据长度为0
	m_ctrlComm.GetInput();//先预读缓冲区以清除残留数据
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

BEGIN_EVENTSINK_MAP(CSCommDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CSCommDlg)
	ON_EVENT(CSCommDlg, IDC_MSCOMM, 1 /* OnComm */, OnComm, VTS_NONE)
	//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

void CSCommDlg::OnComm() 
{
	VARIANT variant_inp;//Zhang
	COleSafeArray safearray_inp;
	LONG len,k;
	BYTE rxdata[2048]; //设置BYTE数组 An 8-bit integer that is not signed.
	CString strTemp;
	if(m_ctrlComm.GetCommEvent()==2)     //事件值为2表示接收缓冲区内有字符
	{
		variant_inp=m_ctrlComm.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
		for(k=0;k<len;k++)             //将数组转换为Cstring型变量
		{
			BYTE bt=*(char*)(rxdata+k);      //字符型
			strTemp.Format("%c",bt);         //将字符送入临时变量strTemp存放
			m_strRXData+=strTemp;    //加入接收编辑框对应字符串    
		}
	}
	UpdateData(FALSE);           //更新编辑框内容
	
}

void CSCommDlg::OnManualSend() 
{
	UpdateData(TRUE); //读取编辑框内容Zhang
	m_ctrlComm.SetOutput(COleVariant(m_strTXData));//发送数据
	GetDlgItem(IDC_EDIT_TXDATA)->SetFocus();	
}
//Zhang
void CSCommDlg::OnClearRecvBox() 
{
	m_strRXData="";	
	GetDlgItem(IDC_EDIT_TXDATA)->SetFocus();	
	UpdateData(FALSE); 
}

void CSCommDlg::OnClearSendBox() 
{
	m_strTXData="";
	GetDlgItem(IDC_EDIT_TXDATA)->SetFocus();	
	UpdateData(FALSE); 
}