serialportdlg.cpp

在Visual c++下的串口通信程序

// SerialPortDlg.cpp : implementation file
//

#include "stdafx.h"
#include "SerialPort.h"
#include "SerialPortDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CSerialPortDlg dialog

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

void CSerialPortDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSerialPortDlg)
	DDX_Control(pDX, IDC_CLOSE_COM, m_ButClose);
	DDX_Control(pDX, IDC_OPEN_COM, m_ButOpen);
	DDX_Control(pDX, IDC_PARITY, m_ComboParity);
	DDX_Control(pDX, IDC_STOP, m_ComboStop);
	DDX_Control(pDX, IDC_DATA, m_ComboData);
	DDX_Control(pDX, IDC_PORT, m_ComboPort);
	DDX_Control(pDX, IDC_BAUD, m_ComboBaud);
	DDX_Text(pDX, IDC_REC_DISP, m_strRecDisp);
	DDX_Text(pDX, IDC_SEND_EDIT, m_strSendEdit);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSerialPortDlg, CDialog)
	//{{AFX_MSG_MAP(CSerialPortDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_OPEN_COM, OnOpenCom)
	ON_BN_CLICKED(IDC_CLOSE_COM, OnCloseCom)
	ON_BN_CLICKED(IDC_SEND, OnSend)
	ON_BN_CLICKED(IDC_CLEAR_SEND, OnClearSend)
	ON_BN_CLICKED(IDC_CLEAR_REC, OnClearRec)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSerialPortDlg message handlers

BOOL CSerialPortDlg::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_ComboBaud.SetCurSel(0);			/* 默认波特率为: 115200 */
	m_ComboData.SetCurSel(1);			/* 默认数据位为: 8位 */
	m_ComboParity.SetCurSel(0);			/* 默认校验为: 无 */
	m_ComboPort.SetCurSel(0);			/* 默认端口为: COM1 */
	m_ComboStop.SetCurSel(0);			/* 默认停止位为: 1位 */

	m_ButClose.EnableWindow(FALSE);		/* "关闭端口"按键无效 */
	m_hComm = INVALID_HANDLE_VALUE;		/* 串口操作句柄无效 */
	m_ExitThreadEvent = NULL;			/* 串口接收线程退出事件无效 */
	m_strRecDisp = _T("");				/* 接收显示字符为空 */

	UpdateData(FALSE);
	return TRUE; 
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CSerialPortDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
		if (m_ExitThreadEvent != NULL)
	{
		SetEvent(m_ExitThreadEvent);				/* 通知串口接收线程退出 */
		Sleep(1000);
		CloseHandle(m_ExitThreadEvent);				/* 关闭接收线程退出事件句柄 */
		m_ExitThreadEvent = NULL;
	}

	ClosePort();									/* 关闭串口 */
}
/****************************************************************

		实    验   代   码

*****************************************************************/

/*******************************************************************************************
函数名称: CSerialPortDlg::OpenPort
描    述: 打开串口
输入参数: LPCTSTR Port: 串口名,如"COM0:","COM1:"
		  int BaudRate: 波特率
		  int DataBits: 数据位, 取值为7或8
		  int StopBits: 停止位
		  int Parity  : 奇偶校验位
输出参数: 无
返    回: FALSE: 失败;    TRUE: 成功
********************************************************************************************/
BOOL CSerialPortDlg::OpenPort(LPCTSTR Port, int BaudRate, int DataBits, int StopBits, int Parity)
{
	COMMTIMEOUTS CommTimeOuts;

	// 打开串口
	m_hComm = CreateFile(Port, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
	if(m_hComm == INVALID_HANDLE_VALUE)
	{
		MessageBox(_T("无法打开端口或端口已打开!请检查是否已被占用."));
		return FALSE;
	}

	GetCommState(m_hComm, &dcb);						/* 读取串口的DCB */
	dcb.BaudRate = BaudRate;			
	dcb.ByteSize = DataBits;
	dcb.Parity = Parity;
	dcb.StopBits = StopBits;	
	dcb.fParity = FALSE;								/* 禁止奇偶校验 */
	dcb.fBinary = TRUE;
	dcb.fDtrControl = 0;								/* 禁止流量控制 */
	dcb.fRtsControl = 0;
	dcb.fOutX = 0;
	dcb.fInX = 0;
	dcb.fTXContinueOnXoff = 0;