key1exampledlg.cpp

WIN CE 在 LPC2200 中的 中断流驱动程序的验证

// Key1ExampleDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Key1Example.h"
#include "Key1ExampleDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CKey1ExampleDlg dialog

CKey1ExampleDlg::CKey1ExampleDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CKey1ExampleDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CKey1ExampleDlg)
		// 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 CKey1ExampleDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CKey1ExampleDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CKey1ExampleDlg, CDialog)
	//{{AFX_MSG_MAP(CKey1ExampleDlg)
	ON_BN_CLICKED(IDC_OPEN_KEY1, OnOpenKey1)
	ON_BN_CLICKED(IDC_CLOSE_KEY1, OnCloseKey1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CKey1ExampleDlg message handlers

BOOL CKey1ExampleDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 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
	
	CenterWindow(GetDesktopWindow());	// center to the hpc screen

	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}


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

		实    验    代    码

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


HANDLE hFile = INVALID_HANDLE_VALUE;					/* 驱动程序设备句柄 */
DWORD Key1Count = 0;

// 读 KEY1 状态线程
DWORD CKey1ExampleDlg::ReadKey1Thread(LPVOID lparam) 
{
	BYTE status;
	DWORD actlen;
	CString strCount;
	CKey1ExampleDlg *pDlg = (CKey1ExampleDlg*)lparam;	/* 取得对话框指针 */
	CStatic *pCountStatic = (CStatic*)pDlg->GetDlgItem(IDC_KEY1_COUNTER);
														/* 取得显示计数值的文本框指针 */

	while(TRUE)
	{
		if (hFile == INVALID_HANDLE_VALUE)
			break;									   /* 驱动未打开, 退出线程 */

		if (ReadFile(hFile, &status, 1, &actlen, NULL) == TRUE)
		{
			if (status == 1)
			{										    /* KEY1 按键按下 */
				Key1Count++;							/* 计数器计数 */
				strCount.Format(_T("%d"), Key1Count);
				pCountStatic->SetWindowText(strCount);	/* 显示 */
			}	
			else
				break;									
		}
		else
			break;										/* ReadFile()执行错误 */
	}

	return 1;
}


// "打开驱动" 按键单击事件代码
void CKey1ExampleDlg::OnOpenKey1() 
{
	DWORD IDThread;
	HANDLE hReadKey1Thread;								/* 读 KEY1 线程句柄 */

	// 打开 KEY1 驱动
	hFile = CreateFile(TEXT("KEY1:"), GENERIC_READ | GENERIC_WRITE, 0, 
					   NULL, OPEN_EXISTING, 0, 0);
	if (hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(_T("打开 KEY1 驱动失败!"));
		return;
	}
	
	// 创建读 KEY1 状态线程
	hReadKey1Thread = CreateThread(0, 0, ReadKey1Thread, this, 0, &IDThread);
	if (hReadKey1Thread == NULL) 
	{
		CloseHandle(hFile);
		hFile = INVALID_HANDLE_VALUE;
		return;
	}
	CloseHandle(hReadKey1Thread);

	// 使能 "关闭驱动" 按键, 禁止 "打开驱动" 按键
	CButton *pOpenButton = (CButton*)GetDlgItem(IDC_OPEN_KEY1);   /* 取得控件指针 */
	CButton *pCloseButton = (CButton*)GetDlgItem(IDC_CLOSE_KEY1); /* 取得控件指针 */
	pOpenButton->EnableWindow(FALSE);
	pCloseButton->EnableWindow(TRUE);

	MessageBox(_T("打开 KEY1 驱动成功!"));
}


// "关闭驱动" 按键单击事件代码
void CKey1ExampleDlg::OnCloseKey1() 
{
	CButton *pOpenButton = (CButton*)GetDlgItem(IDC_OPEN_KEY1);   /* 取得控件指针 */
	CButton *pCloseButton = (CButton*)GetDlgItem(IDC_CLOSE_KEY1); /* 取得控件指针 */

	if (hFile != INVALID_HANDLE_VALUE)
	{
		CloseHandle(hFile);										  /* 关闭驱动 */
		hFile = INVALID_HANDLE_VALUE;		
		pOpenButton->EnableWindow(TRUE);						  /* 使能"打开驱动"按键 */
		pCloseButton->EnableWindow(FALSE);						  /* 禁止"关闭驱动"按键 */
	}				
}