dlgpwmsin.cpp

周立功WinCE光盘资料

// DLGPWMSIN.cpp : implementation file
//

#include "stdafx.h"
#include "Magic2410.h"
#include "DLGPWMSIN.h"
#include "pwm.h"

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

#define  FREQ_VALUE       101			 /* 定义 PWM 频率值*/
/////////////////////////////////////////////////////////////////////////////
// DLGPWMSIN dialog


DLGPWMSIN::DLGPWMSIN(CWnd* pParent /*=NULL*/)
	: CDialog(DLGPWMSIN::IDD, pParent)
{
	//{{AFX_DATA_INIT(DLGPWMSIN)
	m_strPWMduty = _T("");
	m_strPWMfreq = _T("");
	//}}AFX_DATA_INIT
	
}


void DLGPWMSIN::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(DLGPWMSIN)
//	DDX_Control(pDX, IDC_SLIDER, m_SliderDAC);
	DDX_Control(pDX, IDC_SLIDER_PWM2, m_Slider);
	DDX_Text(pDX, IDC_PWM_DUTY, m_strPWMduty);
	DDX_Text(pDX, IDC_PWM_FREQ2, m_strPWMfreq);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(DLGPWMSIN, CDialog)
	//{{AFX_MSG_MAP(DLGPWMSIN)
	ON_WM_DESTROY()
	ON_NOTIFY(NM_CUSTOMDRAW, IDC_SLIDER_PWM2, OnCustomdrawSliderPwm2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// DLGPWMSIN message handlers



void DLGPWMSIN::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	//	DWORD ExitCode;
	//	GetExitCodeThread(gWaveThread,&ExitCode);
	//	ExitThread(ExitCode);
	DWORD buff[3] = {0, FREQ_VALUE, 0}; 
	::DeviceIoControl(hPWMFile, IOCTL_PWM_START, buff, 3, 
							NULL, 0, NULL, NULL);
		if (hPWMFile != NULL)
	{
		// 关闭 PWM 驱动
		CloseHandle(hPWMFile);
		hPWMFile = NULL;
	}	
}

void DLGPWMSIN::OnCustomdrawSliderPwm2(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here
	BOOL ret;
	BYTE prescale[2] = {0, 97};		
	BYTE divider[2] = {0, 2};

	UpdateData(TRUE);
	if (((m_Slider.GetPos() - m_slider_pos) == 0) ||
		(hPWMFile == NULL))
		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;
}

BOOL DLGPWMSIN::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	// TODO: Add extra initialization here
	//	DWORD IDThread;
	
	// 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("Cannot Open PWM1!"));
		return FALSE;
	}
	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_strPWMfreq = "0";								/* 频率与占空比都为0 */
	m_strPWMduty = "0%";
	m_slider_pos = 0;
	
	DWORD buff[3] = {0, FREQ_VALUE, 0}; 
	::DeviceIoControl(hPWMFile, IOCTL_PWM_START, buff, 3, 
							NULL, 0, NULL, NULL);

	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}