testcomxdlg.cpp

这是单机测试串口发送和接收数据的程序,很简单啊!完成基本的串口工作

// testcomxDlg.cpp : implementation file
//

#include "stdafx.h"
#include "testcomx.h"
#include "testcomxDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CTestcomxDlg dialog

CTestcomxDlg::CTestcomxDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTestcomxDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTestcomxDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTestcomxDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTestcomxDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestcomxDlg, CDialog)
	//{{AFX_MSG_MAP(CTestcomxDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestcomxDlg message handlers

BOOL CTestcomxDlg::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
	flag=FALSE;
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CTestcomxDlg::OnOK() 
{
	// TODO: Add extra validation here
	memset(&comstate,0,sizeof(COMSTAT));
	((CComboBox *)GetDlgItem(IDC_COMBO1))->GetWindowText(str1);
	hcom=CreateFile(str1,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,NULL);
	if(hcom==INVALID_HANDLE_VALUE)
	{
		dwerror=GetLastError();
		str.Format("串口异常 %ld",dwerror);
		MessageBox(str);
	}
	if(flag==TRUE)
	{
		MessageBox("串口已开");
	} 
	flag=TRUE;
	SetupComm(hcom,4096,4096);
	GetCommTimeouts(hcom,&timeouts);
	timeouts.ReadIntervalTimeout=MAXWORD;
	timeouts.ReadTotalTimeoutMultiplier=0;
	timeouts.ReadTotalTimeoutConstant=0;
	timeouts.WriteTotalTimeoutMultiplier=0;
	timeouts.WriteTotalTimeoutMultiplier=1000;
	SetCommTimeouts(hcom,&timeouts);
	GetCommState(hcom,&dcb);
	dcb.BaudRate=9600;
	dcb.ByteSize=8;
	dcb.StopBits=ONESTOPBIT;
	dcb.Parity=ODDPARITY;
	SetCommState(hcom,&dcb);
	memset(&m_read,0,sizeof(OVERLAPPED));
	memset(&m_write,0,sizeof(OVERLAPPED));
	SetCommMask(hcom,EV_RXCHAR);
	m_read.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
	if(m_read.hEvent==NULL)
	{
		dwerror=GetLastError();
		str.Format("读串口事件设置错误 %ld",dwerror);
		MessageBox(str);
	}
	m_write.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
	if(m_write.hEvent==NULL)
	{
		dwerror=GetLastError();
		str.Format("写串口事件设置错误 %ld",dwerror);
		MessageBox(str);
	}
	handle=CreateEvent(NULL,TRUE,TRUE,NULL);
	if(handle==NULL)
		return;
	pthread=AfxBeginThread(ThreadFunc,(LPVOID)this,0,0,CREATE_SUSPENDED,NULL);
	if(pthread!=NULL)
	{
		pthread->m_bAutoDelete=FALSE;
		pthread->ResumeThread();
	}
}
DWORD CTestcomxDlg::OnReadCom(byte *but,DWORD length)
{	ClearCommError(hcom,&dwerror,&comstate);
	flag1=ReadFile(hcom,but,length,&length,&m_read);
	if(flag1==FALSE)
	{
		dwerror=GetLastError();
		if(dwerror==ERROR_IO_PENDING)
		GetOverlappedResult(hcom,&m_read,&length,TRUE);
	}
	SetEvent(handle);
	string+=but;
	GetDlgItem(IDC_EDIT2)->SetWindowText(string);
	return length;
}
DWORD CTestcomxDlg::OnWriteCom(byte *butt,DWORD length)
{	ClearCommError(hcom,&dwerror,&comstate);
	flag1=WriteFile(hcom,butt,length,&length,&m_write);
	if(flag1==FALSE)
	{
		dwerror=GetLastError();
		if(dwerror==ERROR_IO_PENDING)
		GetOverlappedResult(hcom,&m_write,&length,TRUE);
	}
	return length;
}
UINT ThreadFunc(LPVOID n)
{
	CTestcomxDlg *pdlg=(CTestcomxDlg *)n;
	COMSTAT comstat;
	memset(&comstat,0,sizeof(COMSTAT));
	DWORD dword;
	DWORD dwmask;
	OVERLAPPED m_os;
	CString strth;
	memset(&m_os,0,sizeof(OVERLAPPED));
	m_os.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
	if(m_os.hEvent==NULL)
		return -1;
	while(pdlg->flag)
	{
		dwmask=0;
		WaitCommEvent(pdlg->hcom,&dwmask,&m_os);
		if(dwmask==EV_RXCHAR)
		{
			ClearCommError(pdlg->hcom,&dword,&comstat);
			dword=comstat.cbInQue;
			if(dword)
			{
				strth.Format("%ld",dword);
				pdlg->OnDisplay(strth);
				WaitForSingleObject(pdlg->handle,INFINITE);//该事件用于控制线程保证 读完缓冲区后再循环
				ResetEvent(pdlg->handle);
				memset(pdlg->buf,0,sizeof(pdlg->buf));
				pdlg->OnReadCom(pdlg->buf,dword);
				continue;
			}
		}
		else
		{
			if(GetLastError()==ERROR_IO_PENDING)
				GetOverlappedResult(pdlg->hcom,&m_os,&dword,TRUE);//等待通信事件结束是个重叠操作若结束线程时没有setcommmask(hcom,0)将一直等待
			
			else
			{
				CloseHandle(m_os.hEvent);
				//if(pdlg->flag==FALSE)
				return -1;
			}
		}
	//	Sleep(1);
	}
	CloseHandle(m_os.hEvent);
	return 0;
}

void CTestcomxDlg::OnChangeEdit1() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here

}

void CTestcomxDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here

	string=_T("");
	memset(buff,0,sizeof(buff));
	GetDlgItem(IDC_EDIT1)->GetWindowText(str);
	memcpy(buff,str,strlen(str));
	OnWriteCom(buff,strlen(str));
	str2.Format("%d",strlen(str));
	GetDlgItem(IDC_STATICD)->SetWindowText(str2);
}

void CTestcomxDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	if(flag==TRUE)
	{
		SetCommMask(hcom,0);
		SetEvent(handle);
		if(handle)
		CloseHandle(handle);
		flag=FALSE;
		WaitForSingleObject(pthread->m_hThread,INFINITE);
		pthread=NULL;
		if(m_read.hEvent!=NULL)
			CloseHandle(m_read.hEvent);
		if(m_write.hEvent!=NULL)
			CloseHandle(m_write.hEvent);
		
		CloseHandle(hcom);
	}
	
	CDialog::OnCancel();
}
void CTestcomxDlg::OnDisplay(CString s)
{
	GetDlgItem(IDC_DISP)->SetWindowText(s);
}