adcsampledlg.cpp

周立功WinCE光盘资料

// ADCSampleDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ADCSample.h"
#include "ADCSampleDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CADCSampleDlg dialog

CADCSampleDlg::CADCSampleDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CADCSampleDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CADCSampleDlg)
	m_DispAIN0 = 0;
	m_DispAIN1 = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CADCSampleDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CADCSampleDlg)
	DDX_Text(pDX, IDC_DISP_AIN0, m_DispAIN0);
	DDX_Text(pDX, IDC_DISP_AIN1, m_DispAIN1);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CADCSampleDlg, CDialog)
	//{{AFX_MSG_MAP(CADCSampleDlg)
	ON_WM_TIMER()
	ON_BN_CLICKED(IDC_OPEN_ADC, OnOpenAdc)
	ON_BN_CLICKED(IDC_CLOSE_ADC, OnCloseAdc)
	ON_BN_CLICKED(IDC_SAMPLE, OnSample)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CADCSampleDlg message handlers

BOOL CADCSampleDlg::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

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


#include "adc.h"						 /* 包含 ADC 命令代码头文件 */

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

// "打开驱动" 按键单击事件代码
void CADCSampleDlg::OnOpenAdc()
{
	// 打开 ADC 驱动
	hFile = CreateFile(TEXT("ADC1:"), GENERIC_READ | GENERIC_WRITE, 0, 
							NULL, OPEN_EXISTING, 0, 0);
	if (hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(_T("打开 ADC 驱动失败!"));
		return;
	}
	else
		MessageBox(_T("打开 ADC 驱动成功!!"));

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


// "关闭驱动" 按键单击事件代码
void CADCSampleDlg::OnCloseAdc() 
{
	if (hFile != INVALID_HANDLE_VALUE)
	{
		// 关闭 ADC 驱动
		CloseHandle(hFile);
		hFile = INVALID_HANDLE_VALUE;
	}	

	CButton *Key;
	Key = (CButton *)GetDlgItem(IDC_SAMPLE);
	if ((Key->GetState() & 0x0003) == 1)							/* 按键按下 */
	{
		Key->SetCheck(0);
		Key->SetWindowText(_T("开始采样"));							/* 按键标题复原 */
		KillTimer(1);												/* 取消定时 */
	}	

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


// 对话框关闭退出处理函数
void CADCSampleDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	OnCloseAdc();
}


// "开始采样" 按键单击事件代码
void CADCSampleDlg::OnSample() 
{
	CButton *Key;
	Key = (CButton *)GetDlgItem(IDC_SAMPLE);	
	
	if (hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(_T("ADC 驱动未打开!"));
		Key->SetWindowText(_T("开始采样"));		/* 按键标题保持不变 */
		Key->SetCheck(0);						/* 按键保持为未按下 */
		return;
	}

	UINT state = Key->GetState();
	if ((state & 0x0003) == 1)					/* 按键按下 */
	{
		Key->SetWindowText(_T("停止采样"));		/* 按键标题改变, 提示下次操作 */
		SetTimer(1, 20, NULL);					/* 启动定时器, 进行采样 */
	}
	else										/* 按键弹起 */
	{
		Key->SetWindowText(_T("开始采样"));		/* 按键标题复原 */
		KillTimer(1);							/* 取消定时 */
	}	
}


// 定时器服务程序
void CADCSampleDlg::OnTimer(UINT nIDEvent) 
{
	DWORD actlen;
	BOOL ret;
	BYTE channel = 0;
	float v0,v1;

	// 采样 W1(AIN0) 电压值
	ret = ::DeviceIoControl(hFile, IOCTL_SET_ADC_CHANNEL,
							&channel, 1, NULL, 0, NULL, NULL);	/* 设置当前转换通道为0 */
	if (ret != TRUE)
	{
		KillTimer(1);
		MessageBox(_T("设置ADC通道0失败 !"));
		goto END;
	}

	ret = ::ReadFile(hFile, &m_DispAIN0, 1, &actlen, NULL);		/* 读取通道0采样值 */
	if (ret != TRUE)
	{
		KillTimer(1);
		MessageBox(_T("读取ADC通道0失败 !"));
		goto END;
	}	

	// 采样 W2(AIN1) 电压值
	channel = 1;
	ret = ::DeviceIoControl(hFile, IOCTL_SET_ADC_CHANNEL,
							&channel, 1, NULL, 0, NULL, NULL);	/* 设置当前转换通道为1 */
	if (ret != TRUE)
	{
		KillTimer(1);
		MessageBox(_T("设置ADC通道1失败 !"));
		goto END;
	}

	ret = ::ReadFile(hFile, &m_DispAIN1, 1, &actlen, NULL);		/* 读取通道1采样值 */
	if (ret != TRUE)
	{
		KillTimer(1);
		MessageBox(_T("读取ADC通道1失败 !"));
		goto END;
	}	
	
	v0 = (float)(m_DispAIN0) / 1024;	/* 转换为小数值 */
	v1 = (float)(m_DispAIN1) / 1024;

	m_DispAIN0 = (DWORD)(v0 * 3300);	/* 计算出电压值 */
	m_DispAIN1 = (DWORD)(v1 * 3300); 

	UpdateData(FALSE);					/* 更新显示 */

END:
	CDialog::OnTimer(nIDEvent);
}