gpiobeepdlg.cpp

GPIOBeep是关于arm9 2440的gpio口操作的相关源码

// GPIOBeepDlg.cpp : implementation file
//

#include "stdafx.h"
#include "GPIOBeep.h"
#include "GPIOBeepDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CGPIOBeepDlg dialog

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

BEGIN_MESSAGE_MAP(CGPIOBeepDlg, CDialog)
	//{{AFX_MSG_MAP(CGPIOBeepDlg)
	ON_BN_CLICKED(IDC_OPEN_PIO1, OnOpenPio1)
	ON_BN_CLICKED(IDC_CLOSE_PIO1, OnClosePio1)
	ON_BN_CLICKED(IDC_BEEP_ON, OnBeepOn)
	ON_BN_CLICKED(IDC_BEEP_OFF, OnBeepOff)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGPIOBeepDlg message handlers

BOOL CGPIOBeepDlg::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

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

// 包含命令码头文件
#include "gpio.h"

// 文件句柄
HANDLE hFile = INVALID_HANDLE_VALUE;

// "打开GPIO驱动" 按键单击事件代码
void CGPIOBeepDlg::OnOpenPio1() 
{
	BOOL ret;
	BYTE pinnum = 10;

	// 打开 GPIO 驱动
	hFile = CreateFile(TEXT("PIO1:"), GENERIC_READ | GENERIC_WRITE, 0, 
					   NULL, OPEN_EXISTING, 0, 0);
	
	if (hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(_T("打开 GPIO 驱动失败!"));
		return; 
	}
	else
		MessageBox(_T("打开 GPIO 驱动成功!"));

	// 设置 GPH10 为输出口
	ret = ::DeviceIoControl(hFile, IOCTL_GPH_SET_PIN_OUT, &pinnum, 1, NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		OnClosePio1();
		MessageBox(_T("设置 GPH10 引脚输出失败!"));
		return;
	}

	CButton *pOpenButton = (CButton*)GetDlgItem(IDC_OPEN_PIO1);		/* 取得控件指针 */
	CButton *pCloseButton = (CButton*)GetDlgItem(IDC_CLOSE_PIO1);  
	pOpenButton->EnableWindow(FALSE);								/* 禁止按键 */
	pCloseButton->EnableWindow(TRUE);								/* 使能按键 */
}


// "关闭GPIO驱动" 按键单击事件代码
void CGPIOBeepDlg::OnClosePio1() 
{
	if (hFile != INVALID_HANDLE_VALUE)
	{
		CloseHandle(hFile);
		hFile = INVALID_HANDLE_VALUE;
	}

	CButton *pOpenButton = (CButton*)GetDlgItem(IDC_OPEN_PIO1);		/* 取得控件指针 */
	CButton *pCloseButton = (CButton*)GetDlgItem(IDC_CLOSE_PIO1);  
	pOpenButton->EnableWindow(TRUE);								/* 使能按键 */
	pCloseButton->EnableWindow(FALSE);								/* 禁止按键 */
}	


// "蜂鸣器蜂鸣" 按键单击事件代码
void CGPIOBeepDlg::OnBeepOn() 
{	
	BOOL ret;
	BYTE pinnum = 10;	

	// 置 GPH10 为低电平, 蜂鸣器蜂鸣
	ret = ::DeviceIoControl(hFile, IOCTL_GPH_CLR_PIN, &pinnum, 1, NULL, 0, NULL, NULL);
	if (ret != TRUE)
		MessageBox(_T("设置 GPH10 低电平失败!"));
}


// "禁止蜂鸣器蜂鸣" 按键单击事件代码
void CGPIOBeepDlg::OnBeepOff() 
{
	BOOL ret;
	BYTE pinnum = 10;	

	// 置 GPH10 为高电平, 禁止蜂鸣器蜂鸣
	ret = ::DeviceIoControl(hFile, IOCTL_GPH_SET_PIN, &pinnum, 1, NULL, 0, NULL, NULL);
	if (ret != TRUE)
		MessageBox(_T("设置 GPH10 高电平失败!"));
}

// 对话框关闭退出处理函数
void CGPIOBeepDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	OnClosePio1();						/* 关闭 GPIO 驱动 */
}