testdlg.cpp

可以直接操作PC机的IO口

// testDlg.cpp : implementation file
//

#include "stdafx.h"
#include "test.h"
#include "testDlg.h"
#include <stdio.h>
#include <windows.h>
#include <conio.h>
#include <math.h>
#include "DirectIOLib.h"

typedef struct {short int pitch;short int duration;} NOTE;
NOTE notes[] = {{14, 500}, {16, 500}, {12, 500}, {0, 500}, {7, 1000}};
void setfreq(int hz);
void playnote(NOTE note);
/////////////////////////////////////////////////////////////////////////////
// CTestDlg dialog

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

BEGIN_MESSAGE_MAP(CTestDlg, CDialog)
	//{{AFX_MSG_MAP(CTestDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestDlg message handlers

BOOL CTestDlg::OnInitDialog()
{CDialog::OnInitDialog();
 SetIcon(m_hIcon, TRUE);			// Set big icon
 SetIcon(m_hIcon, FALSE);		// Set small icon
 if (openDirectIO(NULL)==-1) 
  AfxMessageBox("Failed to Open Direct IO !");
 return TRUE;

}

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

void CTestDlg::OnButton1() 
{int i;
 for(i=0; i < sizeof(notes)/sizeof(int); ++i)
		playnote(notes[i]);

}


//====================================================
void setfreq(int hz)
{hz = 1193180 / hz; _outp(0x43, 0xb6);
 _outp(0x42, hz);   _outp(0x42, hz >> 8);
}

void playnote(NOTE note)
{_outp(0x61, _inp(0x61) | 0x03);	
 setfreq((int)(400 * pow(2, note.pitch / 12.0)));
 Sleep(note.duration);
 _outp(0x61, _inp(0x61) & ~0x03);	
}