comserialdlg.cpp

在MFC下

// COMSerialDlg.cpp : implementation file
//

#include "stdafx.h"
#include "COMSerial.h"
#include "COMSerialDlg.h"
#include "afxmt.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()

/////////////////////////////////////////////////////////////////////////////
// CCOMSerialDlg dialog

CCOMSerialDlg::CCOMSerialDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCOMSerialDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCOMSerialDlg)
	m_nParity = 0;
	m_nCom = 0;
	m_dwBaud = 9600;
	m_nData = 0;
	m_bOverlap = FALSE;
	m_nStop = 0;
	m_nShake = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCOMSerialDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCOMSerialDlg)
	DDX_Radio(pDX, IDC_PARITY_NONE, m_nParity);
	DDX_CBIndex(pDX, IDC_COMBO_COM, m_nCom);
	DDX_Text(pDX, IDC_EDIT_BAUD, m_dwBaud);
	DDX_Text(pDX, IDC_EDIT_DATA, m_nData);
	DDX_Check(pDX, IDC_CHECK_OVERLAP, m_bOverlap);
	DDX_Radio(pDX, IDC_STOP_ONE, m_nStop);
	DDX_Radio(pDX, IDC_SHAKE_NONE, m_nShake);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCOMSerialDlg, CDialog)
	//{{AFX_MSG_MAP(CCOMSerialDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_TRANSFER, OnTransfer)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCOMSerialDlg message handlers

BOOL CCOMSerialDlg::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
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CCOMSerialDlg::OnTransfer() 
{
	COMMCONFIG cfg;
	CommConfigDialog("COM1",NULL,&cfg);
/*
	// TODO: Add your control notification handler code here
	// 获得用户指定的参数
	this->UpdateData();

	// 初始化COM端口
	this->Open(m_bOverlap);

	// 分别采用同步和异步模式
	if (m_bOverlap)
		this->Sync();
	else
		this->Async();
*/
}

void CCOMSerialDlg::Sync()
{
	HANDLE hCom = Open(FALSE);
	if (hCom == NULL)
		return;

	// 获得调制解调器状态
    DWORD dwModemStatus;
	if (!GetCommModemStatus(hCom, &dwModemStatus))
	{
		AfxMessageBox(_T("读取MODEM状态失败!"));
		::CloseHandle(hCom);
		return;
	}

	if (!SetupComm(hCom,9888,9888))
	{
		AfxMessageBox(_T("创建输入/输出缓冲区失败!"));
		::CloseHandle(hCom);
		return;
	}

	// 设定访问的超时值
    COMMTIMEOUTS timeouts;
	timeouts.ReadIntervalTimeout = MAXDWORD;
	timeouts.ReadTotalTimeoutConstant = 0;
	timeouts.ReadTotalTimeoutMultiplier = 0;
	timeouts.WriteTotalTimeoutConstant = 0;
	timeouts.WriteTotalTimeoutMultiplier = 0;

	// 发送一批数据
	CString strSend = "The Data has been Sent!";
	DWORD dwWritten = 0;
	if (!WriteFile(hCom,(LPCTSTR)strSend,strSend.GetLength(),&dwWritten,NULL)) 
	{
		AfxMessageBox(_T("向端口写数据失败!"));
		::CloseHandle(hCom);
		return;
	}

	// 选定“感兴趣”的事件、信号
	if (!SetCommMask(hCom,EV_TXEMPTY))
	{
		AfxMessageBox(_T("选择监听信号失败!"));
		::CloseHandle(hCom);
		return;
	}

	// 停止对串口的写操作
	if (!PurgeComm(hCom,PURGE_TXABORT))
	{
		AfxMessageBox(_T("停止写端口操作时发生错误!"));
		::CloseHandle(hCom);
		return;
	}

	char chRead[18];
	DWORD dwRead = 0;
	if (!ReadFile(hCom,chRead,18,&dwRead,NULL))
	{
		AfxMessageBox(_T("从串口读取数据失败!"));
		::CloseHandle(hCom);
		return;
	}

	// 停止对串口的写操作
	if (!PurgeComm(hCom,PURGE_RXABORT))
	{
		AfxMessageBox(_T("停止读端口操作时发生错误!"));
		::CloseHandle(hCom);
		return;
	}

	// 将缓冲区中的数据发送到串口
	if (!FlushFileBuffers(hCom))
	{
		AfxMessageBox(_T("处理缓冲数据时发生错误!"));
		::CloseHandle(hCom);
		return;
	}
	
	::CloseHandle(hCom);
}

void CCOMSerialDlg::Async()
{
	HANDLE hCom = Open(TRUE);
	if (hCom == NULL)
		return;

    CEvent event(FALSE,TRUE);
    OVERLAPPED overlapped;
    // 初始化OVERLAPPED结构
	memset(&overlapped,sizeof(OVERLAPPED),'\0');
    overlapped.hEvent = event;

	DWORD dwWritten = 0;
	CString strSend = "The Data has been Sent!";
	// 异步发送
	if (!WriteFile(hCom,(LPCTSTR)strSend,strSend.GetLength(),&dwWritten,&overlapped))
	{
		if (GetLastError() != ERROR_IO_PENDING)
		{
			AfxMessageBox(_T("写端口失败!"));
			::CloseHandle(hCom);
			return;
		}

		WaitForSingleObject(event,INFINITE);
		if (!::GetOverlappedResult(hCom,&overlapped,&dwWritten,TRUE))
		{
			AfxMessageBox(_T("等待异步操作结果时发生错误!"));
			::CloseHandle(hCom);
			return;
		}
	}

	char chRead[18];
	DWORD dwRead = 0;
	// 异步读取
	if (!ReadFile(hCom,chRead,18,&dwRead,&overlapped))
	{
		if (GetLastError() != ERROR_IO_PENDING)
		{
			AfxMessageBox(_T("读端口失败!"));
			::CloseHandle(hCom);
			return;
		}

		if (WaitForSingleObject(event,1888) != WAIT_OBJECT_0)
		{
			AfxMessageBox(_T("读端口失败!"));
			::CloseHandle(hCom);
			return;
		}

		if (!::GetOverlappedResult(hCom,&overlapped,&dwRead,TRUE))
		{
			AfxMessageBox(_T("等待异步操作结果时发生错误!"));
			::CloseHandle(hCom);
			return;
		}
	}

	DWORD dwMask = EV_TXEMPTY;
	if (!SetCommMask(hCom,dwMask))
	{
		AfxMessageBox(_T("选择监听信号失败!"));
		::CloseHandle(hCom);
		return;
	}

	// 等待预定事件发生
	if (!WaitCommEvent(hCom,&dwMask,&overlapped))
	{
		if (GetLastError() != ERROR_IO_PENDING)
		{
			AfxMessageBox(_T("等待串口事件时出错!"));
			::CloseHandle(hCom);
			return;
		}
	}

	::CloseHandle(hCom);
}

HANDLE CCOMSerialDlg::Open(BOOL bOverlap)
{
	DWORD dwFlags = bOverlap ? FILE_FLAG_OVERLAPPED : 0;
	CString strCom;
	strCom.Format("\\\\.\\COM%d",m_nCom + 1);

	// 打开指定的串口
	HANDLE hCom = ::CreateFile(strCom,GENERIC_READ | GENERIC_WRITE,0,NULL,
		OPEN_EXISTING,dwFlags,NULL);

	// 获得串口的配置信息
	COMMCONFIG ComCfg;
	DWORD dwSize = sizeof(ComCfg);
	if (!::GetCommConfig(hCom,&ComCfg,&dwSize))
	{
		AfxMessageBox(_T("读取串口配置失败!"));
		::CloseHandle(hCom);
		return NULL;
	}

	// 获得当前的串口配置状态
	DCB dcb;
	if (!GetCommState(hCom,&dcb))
	{
		AfxMessageBox(_T("读取串口状态失败!"));
		::CloseHandle(hCom);
		return NULL;
	}

	// 设置奇偶校验方式
	switch (m_nParity)
	{
	case 0:
		// 不校验
		dcb.Parity = NOPARITY;    
		break;	
	case 1:
		// 奇校验
		dcb.Parity = ODDPARITY;   
		break;
	case 2:
		// 偶校验
		dcb.Parity = EVENPARITY;  
		break;
	case 3:
		// MARK方式
		dcb.Parity = MARKPARITY;  
		break;
	case 4:
		// SPACE方式
		dcb.Parity = SPACEPARITY; 
		break;
	}

	// 设置数据位格式
	dcb.ByteSize = m_nData;

	// 设置波特率
	dcb.BaudRate = m_dwBaud;

	// 设置停止位方式
	switch (m_nStop)
	{
	case 0:
		// 停止位为1位
		dcb.StopBits = ONESTOPBIT;
		break;
	case 1:
		// 停止位为1.5位
		dcb.StopBits = ONE5STOPBITS; 
		break;
	case 2:
		// 停止位为2位
		dcb.StopBits = TWOSTOPBITS;  
		break;
	}

	// 设置灵敏度
	dcb.fDsrSensitivity = FALSE;

	// 设置流控制方式
	switch (m_nShake)
	{
    case 0:
		// 无流量控制
		dcb.fOutxCtsFlow = FALSE;
		dcb.fOutxDsrFlow = FALSE;
		dcb.fOutX = FALSE;
		dcb.fInX = FALSE;
		break;
	case 1:
		// RTS控制，监视CTS信号
		dcb.fOutxCtsFlow = TRUE;
		dcb.fOutxDsrFlow = FALSE;
		dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
		dcb.fOutX = FALSE;
		dcb.fInX = FALSE;
		break;
    case 2:
		// DTR控制，监视CTS信号
		dcb.fOutxCtsFlow = TRUE;
		dcb.fOutxDsrFlow = FALSE;
		dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
		dcb.fOutX = FALSE;
		dcb.fInX = FALSE;
		break;
	case 3:
		// RTS控制，监视DSR信号
		dcb.fOutxCtsFlow = FALSE;
		dcb.fOutxDsrFlow = TRUE;
		dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
		dcb.fOutX = FALSE;
		dcb.fInX = FALSE;
		break;
    case 4:
		// DTR控制，监视DSR信号
		dcb.fOutxCtsFlow = FALSE;
		dcb.fOutxDsrFlow = TRUE;
		dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
		dcb.fOutX = FALSE;
		dcb.fInX = FALSE;
		break;
    case 5:
		// XON/XOFF控制方式
		dcb.fOutxCtsFlow = FALSE;
		dcb.fOutxDsrFlow = FALSE;
		dcb.fOutX = TRUE;
		dcb.fInX = TRUE;
		dcb.XonChar = 0x11;
		dcb.XoffChar = 0x13;
		dcb.XoffLim = 100;
		dcb.XonLim = 100;
		break;
	}

	// 将设定的参数值用于该串口
	if (!SetCommState(hCom, &dcb))
	{
		AfxMessageBox(_T("设置COM端口状态失败!"));
		::CloseHandle(hCom);
		return NULL;
	}

	return hCom;
}