stepmotordlg.cpp

步进电机控制实验

// StepMotorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "StepMotor.h"
#include "StepMotorDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CStepMotorDlg dialog

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

BEGIN_MESSAGE_MAP(CStepMotorDlg, CDialog)
	//{{AFX_MSG_MAP(CStepMotorDlg)
	ON_BN_CLICKED(IDC_OPEN_PIO1, OnOpenPio1)
	ON_BN_CLICKED(IDC_CLOSE_PIO1, OnClosePio1)
	ON_BN_CLICKED(IDC_StepRun, OnStepRun)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CStepMotorDlg message handlers

BOOL CStepMotorDlg::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"

// 定义步进电机各相使用的 GPIO 编号
#define   MOTOA  5
#define   MOTOB  6
#define   MOTOC  7
#define   MOTOD  0

// 文件句柄
HANDLE hFile = INVALID_HANDLE_VALUE;

// "打开GPIO驱动" 按键单击事件代码
void CStepMotorDlg::OnOpenPio1() 
{
	BOOL ret;

	// A,B,C,D 各相对就 GPIO 掩码
	DWORD pinmask = (1 << MOTOA) + (1 << MOTOB) + (1 << MOTOC) + (1 << MOTOD); 

	// 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 GPC0, GPC5, GPC6, GPC7 为输出口
	ret = ::DeviceIoControl(hFile, IOCTL_GPC_SET_MULTI_PIN_OUT, &pinmask, 1, NULL, 0, NULL, NULL);
	if (ret != TRUE)
	{
		OnClosePio1();
		MessageBox(_T("设置 GPIO 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 CStepMotorDlg::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 */
}


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


/********************************************************************
函数名称: SetPinStatus()
功能描述: 设置 GPIO 引脚为高电平或低电平
输入参数: DWORD pinnum : 引脚编号, 取值为: MOTOA ~ MOTOD
		  BYTE status  : 引脚状态, 1 -- 输出高电平, 0 -- 输出低电平
返 回 值: TRUE: 操作成功    FALSE: 操作失败  
*********************************************************************/
BOOL SetPinStatus(DWORD pinnum, BYTE status)
{
	BOOL ret;

	if (status != 0)
		ret = ::DeviceIoControl(hFile, IOCTL_GPC_SET_PIN, &pinnum, 1, NULL, 0, NULL, NULL);
	else
		ret = ::DeviceIoControl(hFile, IOCTL_GPC_CLR_PIN, &pinnum, 1, NULL, 0, NULL, NULL);

	return ret;
}


/********************************************************************
函数名称: MotoMode2()
功能描述: 步进电机双四拍程序
		  控制时序为: AB-BC-CD-DA-AB
输入参数: DWORD dly: 每一步的延时控制, 值越大,延时越久
返 回 值: 无
*********************************************************************/
void MotoMode2(DWORD dly)
{
	// AB 相有效
	SetPinStatus(MOTOA, 1);
	SetPinStatus(MOTOB, 1);
	Sleep(dly);
	SetPinStatus(MOTOA, 0);
	SetPinStatus(MOTOB, 0);

	// BC 相有效
	SetPinStatus(MOTOB, 1);
	SetPinStatus(MOTOC, 1);
	Sleep(dly);
	SetPinStatus(MOTOB, 0);
	SetPinStatus(MOTOC, 0);

	// CD 相有效
	SetPinStatus(MOTOC, 1);
	SetPinStatus(MOTOD, 1);
	Sleep(dly);
	SetPinStatus(MOTOC, 0);
	SetPinStatus(MOTOD, 0);

	// DA 相有效
	SetPinStatus(MOTOD, 1);
	SetPinStatus(MOTOA, 1);
	Sleep(dly);
	SetPinStatus(MOTOD, 0);
	SetPinStatus(MOTOA, 0);
}

// "步进电机转动" 按键单击事件代码 
void CStepMotorDlg::OnStepRun() 
{
	DWORD i;
	if (hFile == INVALID_HANDLE_VALUE)
		return;
	
	// 步进电机运转四圈(电机步距为18度)
	for (i = 0; i < 20; i++)
	{
		MotoMode2(20); 
	}
}