dcmotordlg.cpp

周立功WinCE光盘资料

// DCMotorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DCMotor.h"
#include "DCMotorDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDCMotorDlg dialog

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

void CDCMotorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDCMotorDlg)
	DDX_Control(pDX, IDC_SLIDER_PWM, m_Slider);
	DDX_Text(pDX, IDC_PWM_FREQ, m_strPWMfreq);
	DDX_Text(pDX, IDC_PWM_DUTY, m_strPWMduty);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDCMotorDlg, CDialog)
	//{{AFX_MSG_MAP(CDCMotorDlg)
	ON_BN_CLICKED(IDC_OPEN_PWM, OnOpenPwm)
	ON_BN_CLICKED(IDC_CLOSE_PWM, OnClosePwm)
	ON_NOTIFY(NM_CUSTOMDRAW, IDC_SLIDER_PWM, OnCustomdrawSliderPwm)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDCMotorDlg message handlers

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

		实    验    代    码

****************************************************/
#include "pwm.h"						 /* 包含 PWM 命令代码头文件 */
#include "gpio.h"

HANDLE hPWMFile = INVALID_HANDLE_VALUE;	 /* PWM 驱动程序设备句柄 */
HANDLE hGPIOFile = INVALID_HANDLE_VALUE; /* GPIO 驱动程序设备句柄 */

#define  FREQ_VALUE       255			 /* 定义 PWM 频率值*/

BOOL CDCMotorDlg::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
	m_Slider.SetRange(0, FREQ_VALUE - 1, TRUE);		/* 滑块控件滑动范围 */
	m_Slider.SetPos(0);								/* 滑块处于0点 */
	m_Slider.EnableWindow(FALSE);					/* 滑块禁止操作 */
	m_strPWMfreq = "0";								/* 频率与占空比都为0 */
	m_strPWMduty = "0%";
	
	UpdateData(FALSE);

	return TRUE;  // return TRUE  unless you set the focus to a control
}


// "打开驱动" 按键单击事件代码
void CDCMotorDlg::OnOpenPwm()
{
	BOOL ret;
	BYTE pinnum = 9;

	// 打开 PWM 驱动
	hPWMFile = CreateFile(TEXT("PWM1:"), GENERIC_READ | GENERIC_WRITE, 0, 
					   NULL, OPEN_EXISTING, 0, 0);
	if (hPWMFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(_T("打开 PWM 驱动失败!"));
		return;
	}

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

	// 设置 GPH9 为输出口
	ret = ::DeviceIoControl(hGPIOFile, IOCTL_GPH_SET_PIN_OUT, &pinnum, 1, 
							NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		OnClosePwm();
		MessageBox(_T("设置 GPH9 为输出失败!"));
		return;
	}

	// 置 GPH9 为低电平
	ret = ::DeviceIoControl(hGPIOFile, IOCTL_GPH_CLR_PIN, &pinnum, 1, 
							NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		OnClosePwm();
		MessageBox(_T("设置 GPH9 为输出低电平失败!"));
		return;
	}

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

	m_Slider.EnableWindow(TRUE);									/* 滑块使能操作 */
	MessageBox(_T("打开 PWM 和 GPIO 驱动成功!"));
}


// "关闭驱动" 按键单击事件代码
void CDCMotorDlg::OnClosePwm() 
{
	if (hPWMFile != INVALID_HANDLE_VALUE)
	{
		// 关闭 PWM 驱动
		CloseHandle(hPWMFile);
		hPWMFile = INVALID_HANDLE_VALUE;
	}	

	if (hGPIOFile != INVALID_HANDLE_VALUE)
	{
		// 关闭 GPIO驱动
		CloseHandle(hGPIOFile);
		hGPIOFile = INVALID_HANDLE_VALUE;
	}

	CButton *pOpenButton = (CButton*)GetDlgItem(IDC_OPEN_PWM);		/* 取得控件指针 */
	CButton *pCloseButton = (CButton*)GetDlgItem(IDC_CLOSE_PWM);  
	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 CDCMotorDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	OnClosePwm();
}


// 移动滑块控件事件代码
int m_slider_pos = 0;

void CDCMotorDlg::OnCustomdrawSliderPwm(NMHDR* pNMHDR, LRESULT* pResult) 
{
	BOOL ret;
	BYTE prescale[2] = {0, 97};		
	BYTE divider[2] = {0, 2};

	UpdateData(TRUE);
	if (((m_Slider.GetPos() - m_slider_pos) == 0) ||
		(hPWMFile == INVALID_HANDLE_VALUE) ||
		(hGPIOFile == INVALID_HANDLE_VALUE))
		return;										/* 滑块或驱动未打开, 不驱动电机 */

	m_slider_pos = m_Slider.GetPos();				/* 获取滑块当前位置 */

	// 设置PWM0定时器预分频值
	ret = ::DeviceIoControl(hPWMFile, IOCTL_PWM_SET_PRESCALER, prescale, 2, 
							NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		MessageBox(_T("设置 PWM0 定时器预分频值失败!"));
		return;
	}

	// 设置PWM0定时器分频值
	ret = ::DeviceIoControl(hPWMFile, IOCTL_PWM_SET_DIVIDER, divider, 2, 
							NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		MessageBox(_T("设置 PWM0 定时器分频值失败!"));
		return;
	}

	// 启动 PWM0 输出信号
	DWORD buff[3] = {0, FREQ_VALUE, m_slider_pos}; 
	ret = ::DeviceIoControl(hPWMFile, IOCTL_PWM_START, buff, 3, 
							NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		MessageBox(_T("启动 PWM0 信号输出失败!"));
		return;
	}

	// 获取 PWM0 输出频率
	DWORD timer = 0, curfreq, actlen;
	ret = ::DeviceIoControl(hPWMFile, IOCTL_PWM_GET_FREQUENCY, &timer, 1, 
							&curfreq, 1, &actlen, NULL);
	if (ret != TRUE) 
	{
		MessageBox(_T("获取 PWM0 信号输出频率失败!"));
		return;
	}	
	
	m_strPWMfreq.Format(_T("%d"), curfreq);			/* 显示 PWM0 频率 */

	float duty = (float)m_slider_pos / ((float)FREQ_VALUE) * 100;
	m_strPWMduty.Format(_T("%f"), duty); 
	m_strPWMduty += "%";							/* 显示 PWM0 点空比 */

	UpdateData(FALSE);								/* 更新显示 */

	*pResult = 0;
}