splloaderdlg.cpp

一个我刚开始学习WINCE驱动程序时

// SPLLoaderDlg.cpp : implementation file
//

#include "stdafx.h"
#include "SPLLoader.h"
#include "SPLLoaderDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CSPLLoaderDlg dialog
HANDLE hFile = INVALID_HANDLE_VALUE;

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

void CSPLLoaderDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSPLLoaderDlg)
	DDX_Text(pDX, IDC_WRITE_EDIT, m_WriteByte);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSPLLoaderDlg, CDialog)
	//{{AFX_MSG_MAP(CSPLLoaderDlg)
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_OPEN_DRIVER, OnOpenDriver)
	ON_BN_CLICKED(IDC_CLOSE_DRIVER, OnCloseDriver)
	ON_BN_CLICKED(IDC_WRITE, OnWrite)
	ON_BN_CLICKED(IDC_READ, OnRead)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSPLLoaderDlg message handlers

BOOL CSPLLoaderDlg::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
}

void CSPLLoaderDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	
}
//"打开驱动"按键单击事件代码
void CSPLLoaderDlg::OnOpenDriver() 
{
  hFile = CreateFile(TEXT("SPL0:"),GENERIC_READ|GENERIC_WRITE,0,
	                 NULL,OPEN_EXISTING,0,0);
  if(hFile == INVALID_HANDLE_VALUE)
	  MessageBox(_T("不能打开 SPL1!"));
  else
	  MessageBox(_T("打开 SPL1 成功!"));
	 
}
//"关闭驱动"按键单击事件代码
void CSPLLoaderDlg::OnCloseDriver() 
{
	if(hFile != INVALID_HANDLE_VALUE)
	{
	  CloseHandle(hFile);
	  hFile = INVALID_HANDLE_VALUE;
	}
}
//"写入"按键单击事件代码
void CSPLLoaderDlg::OnWrite() 
{
	DWORD tmp,actlen;
	if(hFile == INVALID_HANDLE_VALUE)
	{
	  MessageBox(_T("SimpleDriver 驱动未打开!"));
      return;
	}

	UpdateData(TRUE);
	if((m_WriteByte.GetLength()!=2)||(_stscanf(m_WriteByte,_T("%x"),&tmp)!=1))
	{
	  MessageBox(_T("写入字节必须是1个字节的16进制数!"));
	  return;
	}

	BYTE writebyte = (BYTE)tmp;
	BOOL ret=WriteFile(hFile,&writebyte,1,&actlen,NULL);//将字节写入驱动
	if((ret == FALSE)||(actlen != 1))
	   MessageBox(_T("写入数据失败!"));
    else
       MessageBox(_T("写入数据成功!"));
}
//"读出"按键单击事件代码
void CSPLLoaderDlg::OnRead() 
{
	BYTE recbuff;
	DWORD actlen;
	if(hFile == INVALID_HANDLE_VALUE)
	{
	 MessageBox(_T("SimpleDriver 驱动未打开!"));
     return; 
	}
	BOOL ret = ReadFile(hFile,&recbuff,1,&actlen,NULL);
	if((ret == FALSE)||(actlen != 1))
	{
		MessageBox(_T("读出数据失败!"));
		return;
	}
	else
	   MessageBox(_T("读出数据成功!"));
	CString strTmp;
	strTmp.Format(_T("%x"),recbuff);
	CEdit*pDispEdit = (CEdit*)GetDlgItem(IDC_READ_DISP);
	pDispEdit->SetWindowText(strTmp);
}