testcommdlg.cpp

基于串口的一个小程序,可以用来接收和发送短信消息

// testcommDlg.cpp : implementation file
//

#include "stdafx.h"
#include "testcomm.h"
#include "testcommDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

 HANDLE hCom;                           //全局变量，串口句柄    
 HANDLE hCommThread;                    //全局变量，串口线程

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()

/////////////////////////////////////////////////////////////////////////////
// CTestcommDlg dialog

CTestcommDlg::CTestcommDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTestcommDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTestcommDlg)
	m_send = _T("");
	m_ReceiveData = _T("");
	m_port = -1;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTestcommDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTestcommDlg)
	DDX_Control(pDX, IDC_SPEED_SELECT, m_speed);
	DDX_Control(pDX, IDC_COM_SELECT, m_com);
	DDX_Text(pDX, IDC_SEND_EDIT, m_send);
	DDX_Text(pDX, IDC_RECV_EDIT, m_ReceiveData);
	DDX_CBIndex(pDX, IDC_COM_SELECT, m_port);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestcommDlg, CDialog)
	//{{AFX_MSG_MAP(CTestcommDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_SEND_BUTTON, OnOk)
	ON_BN_CLICKED(IDC_CLEAR_BUTTON, OnClearButton)
	//}}AFX_MSG_MAP
ON_THREAD_MESSAGE(COM_RECVDATA,OnRecvData)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestcommDlg message handlers

BOOL CTestcommDlg::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

	//启动串口监视线程
	DWORD threadID;
	hCommThread=::CreateThread((LPSECURITY_ATTRIBUTES)NULL,0,(LPTHREAD_START_ROUTINE)ThreadProcess,
		AfxGetMainWnd()->m_hWnd,0,&threadID);
	if(hCommThread==NULL)
	{
		::AfxMessageBox("创建监视线程失败");
		::PostQuitMessage(0);
	}
	
	// TODO: Add extra initialization here
	m_com.SetCurSel(0);
	m_speed.SetCurSel(2);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CTestcommDlg::OnOk() 
{
	// TODO: Add your control notification handler code here

	HANDLE hCom;

	//选择串口
	CString str;
	switch(m_port)
	{
	case 0:
		str="COM1";
		break;
	case 1:
		str="COM2";
		break;
	case 2:
		str="COM3";
		break;
	case 3:
		str="COM4";
		break;
	}

	//打开并设置串口
	hCom=CreateFile(str,GENERIC_READ|GENERIC_WRITE,
		0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,
		NULL);
	DCB dcb;
	int i,temp;
	i=m_speed.GetCurSel();
	switch(i)
	{
	case 0:
		temp=2400;
		break;
	case 1:
		temp=4800;
		break;
	case 2:
		temp=9600;
		break;
	case 3:
		temp=19200;
		break;
	}
	GetCommState(hCom,&dcb);
	dcb.BaudRate=temp;
	dcb.fParity=false;
	dcb.ByteSize=8;
	SetCommState(hCom,&dcb);
	SetupComm(hCom,1024,1024);
	PurgeComm(hCom,PURGE_TXCLEAR);

	//发送
	UpdateData(true);
	DWORD wCount=0;
	WriteFile(hCom,m_send,m_send.GetLength(),&wCount,NULL);

//	Sleep(100);

	//关闭串口
//	CloseHandle(hCom);
}

void CTestcommDlg::OnRecvData(WPARAM wParam,LPARAM lParam) 
{
	// TODO: Add your control notification handler code here
	CString recvStr((char *)wParam);
	m_ReceiveData+=recvStr;
	SetCommMask(hCom,EV_TXEMPTY);
	UpdateData(false);
	CloseHandle(hCom);
}

//创建一个线程监控串口接收的数据
DWORD WINAPI ThreadProcess(HWND hWnd)
{
	char str[101];
	DWORD wCount;
	while(1)
	{
		ReadFile(hCom,str,100,&wCount,NULL);
		if(wCount>0)
		{
			str[wCount]='\0';
			//发消息给对话框主窗口，以进行接收内容的显示
			::PostMessage(hWnd,COM_RECVDATA,(unsigned int)str,wCount);
		}
	}
}


void CTestcommDlg::OnClearButton() 
{
	// TODO: Add your control notification handler code here
	m_send="";
	m_ReceiveData="";
	UpdateData(false);
}