comdlg.cpp

本程序是通过串口

// comDlg.cpp : implementation file
//

#include "stdafx.h"
#include "com.h"
#include "comDlg.h"

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



UINT CommProc(LPVOID pParam);		//全局线程

/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CComDlg dialog

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

void CComDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CComDlg)
	DDX_Control(pDX, IDC_EDIT2, m_receive);
	DDX_Control(pDX, IDC_COMBO2, m_bord);
	DDX_Control(pDX, IDC_COMBO1, m_port);
	DDX_Text(pDX, IDC_EDIT1, m_send);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CComDlg, CDialog)
	//{{AFX_MSG_MAP(CComDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON3, OnConnect)
	ON_BN_CLICKED(IDC_BUTTON1, OnSend)
	ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
	ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
	ON_BN_CLICKED(IDC_BUTTON7, OnButton7)
	ON_BN_CLICKED(IDC_LEFT, OnLeft)
	ON_BN_CLICKED(IDC_RIGHT, OnRight)
	ON_BN_CLICKED(IDC_MIDDLE, OnMiddle)
	ON_BN_CLICKED(IDC_FORWORD, OnForword)
	ON_BN_CLICKED(IDC_BACKOFF, OnBackoff)
	ON_BN_CLICKED(IDC_STOP, OnStop)
	//}}AFX_MSG_MAP
	ON_MESSAGE(WM_COMMNOTIFY, OnCommNotify)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CComDlg message handlers

BOOL CComDlg::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_port.AddString("COM1");
	m_port.AddString("COM2");
	m_port.AddString("COM3");
	m_port.AddString("COM4");
	m_port.SetCurSel(0);

	m_bord.AddString("9600");
	m_bord.AddString("19200");
	m_bord.AddString("38400");
	m_bord.SetCurSel(0);
	//事件
	memset(&m_osRead, 0, sizeof(OVERLAPPED));
	memset(&m_osWrite, 0, sizeof(OVERLAPPED));

	if((m_hPostMsgEvent=CreateEvent(NULL, TRUE, TRUE, NULL))==NULL)
		MessageBox("为WM_COMMNOTIFY消息创建事件对象失败");
	// 为重叠读创建事件对象，手工重置，初始化为无信号的
	if((m_osRead.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)
		MessageBox("为重叠读创建事件对象失败");
	// 
	if((m_osWrite.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL))==NULL)
		MessageBox("为重叠写创建事件对象失败");

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

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


/////////////////////////////////////////////////////////
//					用户代码部分
//
////////////////////////////////////////////////////////
//串口号列表
const CString ComName[4]={"COM1","COM2","COM3","COM4"};

//确认连接
void CComDlg::OnConnect() 
{
	CString sPort;
	COMMTIMEOUTS TimeOuts;					//串口设置超时结构体
	sPort=ComName[m_port.GetCurSel()];		//获得所选串口号
	
	//打开一个串口设备
	h_com=CreateFile(sPort, GENERIC_READ | GENERIC_WRITE, 0, NULL,
		OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
		NULL); // 重叠方式// 
	
	if(h_com==INVALID_HANDLE_VALUE)
	{
		MessageBox("不能打开这个串口");
		return;
	}

	SetupComm(h_com,4096,4096);			//1.设置输入输出缓冲
	SetCommMask(h_com, EV_RXCHAR);		//2.设置事件



	//3.超时设置
	// 把间隔超时设为最大，把总超时设为0将导致ReadFile立即返回并完成操作
	TimeOuts.ReadIntervalTimeout=MAXDWORD; 
	TimeOuts.ReadTotalTimeoutMultiplier=0; 
	TimeOuts.ReadTotalTimeoutConstant=0;

	/* 设置写超时以指定WriteComm成员函数中的GetOverlappedResult函数的等待时间*/
	TimeOuts.WriteTotalTimeoutMultiplier=50;
	TimeOuts.WriteTotalTimeoutConstant=2000;

	SetCommTimeouts(h_com, &TimeOuts);

	//4.配置串口
	if(!ConfigConnect())
	{
		MessageBox("配置串口的时候失败");
		return;
	}
//	m_bConnected=TRUE;			//连接标志

	//5.打开接收数据线程
	//AfxBeginThread(CommProc,this);
	m_pThread=AfxBeginThread(CommProc, this, THREAD_PRIORITY_NORMAL, 
			0, CREATE_SUSPENDED, NULL); // 创建并挂起线程
	if(m_pThread==NULL)
	{
		CloseHandle(h_com);
	}
	else
	{
		m_bConnected=TRUE;
		m_pThread->ResumeThread(); // 恢复线程运行
	}
}

//发送函数
void CComDlg::OnSend() 
{
	// TODO: Add your control notification handler code here
	COMSTAT ComStat;
	ULONG nLength=0;
	UpdateData(true);
	ULONG szLength = m_send.GetLength();
	
	char *sz = new char[szLength];
	if(sz==NULL)
		return;
	memcpy(sz,m_send.GetBuffer(szLength),szLength);
	DWORD dwErrorFlags;

	ClearCommError(h_com,&dwErrorFlags,&ComStat);
	BOOL fState=WriteFile(h_com,sz,szLength,&nLength,&m_osWrite);
	if(!fState)
	{
		ULONG my_error=GetLastError();
		if(my_error==ERROR_IO_PENDING)
		{
			GetOverlappedResult(h_com,&m_osWrite,&nLength,TRUE);
		}
		else
			nLength=0;
	}
	delete[] sz;
	sz=NULL;
	
}




const ULONG TheBord[3]={9600,19200,38400}; 
//配置串口
BOOL CComDlg::ConfigConnect()
{
	DCB dcb;

	if(!GetCommState(h_com, &dcb))
		return FALSE;

	dcb.fBinary=TRUE;
	dcb.BaudRate = TheBord[m_bord.GetCurSel()];		// 数据传输速率
	dcb.ByteSize = 8;								// 每字节位数
	dcb.fParity = TRUE;								//校验
	dcb.Parity=NOPARITY;							//为无校验
	dcb.StopBits=ONESTOPBIT;						//1停止位
		
	// 硬件流控制设置
	dcb.fOutxCtsFlow = FALSE;
	dcb.fRtsControl = TRUE;

	// XON/XOFF流控制设置
	dcb.fInX=dcb.fOutX = TRUE;
	dcb.XonChar = 0x11;
	dcb.XoffChar = 0x13;
	dcb.XonLim = 50;
	dcb.XoffLim = 50;

	return SetCommState(h_com, &dcb);
}


//工作者线程
//用于判断串口是否接收到数据,如果有数据,就发信息给WM_COMMNOTIFY
// 工作者线程，负责监视串行口
//
UINT CommProc(LPVOID pParam)
{
	OVERLAPPED os;
	DWORD dwMask, dwTrans;
	COMSTAT ComStat;
	DWORD dwErrorFlags;
	CComDlg *pX1=(CComDlg*)pParam;

	memset(&os, 0, sizeof(OVERLAPPED));
	os.hEvent=CreateEvent(NULL, TRUE, FALSE, NULL);

	if(os.hEvent==NULL)
	{
		AfxMessageBox("Can't create event object!");
		return (UINT)-1;
	}

	while(pX1->m_bConnected)
	{
		ClearCommError(pX1->h_com,&dwErrorFlags,&ComStat);

		if(ComStat.cbInQue)
		{
			// 无限等待WM_COMMNOTIFY消息被处理完
			WaitForSingleObject(pX1->m_hPostMsgEvent, INFINITE);
			//重置事件
			ResetEvent(pX1->m_hPostMsgEvent);

			// 通知!!!
			PostMessage(pX1->GetSafeHwnd(),WM_COMMNOTIFY, EV_RXCHAR, 0);
						//pX1->m_hTermWnd
			continue;
		}

		dwMask=0;

		if(!WaitCommEvent(pX1->h_com, &dwMask, &os)) // 重叠操作
		{

			if(GetLastError()==ERROR_IO_PENDING)
			// 无限等待重叠操作结果
				GetOverlappedResult(pX1->h_com, &os, &dwTrans, TRUE);
			else
			{
				CloseHandle(os.hEvent);
				return (UINT)-1;
			}
		}
	}

	CloseHandle(os.hEvent);