TP Project Debug Tool 动态画点程序部分

于 2012-08-29 10:34:59 发布
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分类专栏： 测试 VC++ CDC VC++ 使用心得 文章标签： buffer processing null timer c
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/phenixyf/article/details/7919016
版权 
<span style="font-size:12px;">//------------------------------------------------
int i = 1;
int j = 1;
//------------------------------------------------

void CTabPage2::OnStartDraw() 
{
	// TODO: Add your control notification handler code here

	KillTimer(2);

//---------------------------------------------------
//设置Timer1
//---------------------------------------------------
	SetTimer(1, 1000, NULL);

}

void CTabPage2::OnDrawLine() 
{
	// TODO: Add your control notification handler code here

	KillTimer(1);

	SetTimer(2, 2000, NULL);
}


void CTabPage2::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default

switch (nIDEvent)
{

case 1:		//Timer1的实际操作——画圆
	{	

	SI_STATUS status = SI_SUCCESS;

	// Confirm an error hasn't already occurred
	if ( (m_bReadError == TRUE) || (m_bWriteError == TRUE) )
	{
		// Call base timer
		CDialog::OnTimer(nIDEvent);

		// Further processing not possible
		return;		
	}

//-----------------------------------------------------
//发送指令给MCU
//-----------------------------------------------------
	m_IObuffer.USB_Buffer[0] = i;
	m_IObuffer.USB_Buffer[1] = i;		//change led status
	m_IObuffer.USB_Buffer[3] = 1;		//send I2C read command
		
//USB data transmission

	DWORD dwBytesSucceed = 0;
	DWORD dwBytesWriteRequest = (sizeof(USB_iobuf)-4);
	DWORD dwBytesReadRequest = (sizeof(USB_iobuf)-4);

// Init. before write
	dwBytesSucceed = 0;

// Perform USB Data Transfer
// Write transfer packet
	status = SI_Write(m_hUSBDevice, &m_IObuffer, dwBytesWriteRequest, &dwBytesSucceed);

	if (dwBytesSucceed != dwBytesWriteRequest || status != SI_SUCCESS)
	{
		m_bWriteError = TRUE;	// Note: Set error flag immediately so that multiple 
								// message boxes do not queue up.
		CString sError;
		sError.Format("Error writing to USB.\nWrote %d of %d bytes.\n\nApplication is aborting.\nReset hardware and try again.", dwBytesSucceed, dwBytesWriteRequest);
		if (AfxMessageBox(sError,MB_OK|MB_ICONEXCLAMATION))
		{
			OnCancel();
			return;
		}
	}

//--------------------------------------------
//Read I2C Data from USB
//--------------------------------------------

// Init. before read
	dwBytesSucceed = 0;

	memset(&m_IObuffer, 0, sizeof(USB_iobuf));

// Read transfer packet
	status = SI_Read(m_hUSBDevice, &m_IObuffer, dwBytesReadRequest, &dwBytesSucceed);

	if (((dwBytesSucceed != dwBytesReadRequest) && (m_bReadError == FALSE)) || status != SI_SUCCESS)
	{
		m_bReadError = TRUE;	// Note: Set error flag immediately so that multiple 
								// message boxes do not queue up.

		CString sError;
		sError.Format("Error reading from USB.\nRead %d of %d bytes.\n\nApplication is aborting.\nReset hardware and try again.", dwBytesSucceed, dwBytesReadRequest);
		if (AfxMessageBox(sError,MB_OK|MB_ICONEXCLAMATION))
		{
			OnCancel();
			return;
		}
	}


//****************************************************************
//绘图操作，以下绘图均在后台完成，图像不会在屏幕上显示
//****************************************************************

//----------------------------------------------------------------
//设置后台环境
//----------------------------------------------------------------
	
	CDC *pDC;		//创建目标DC指针
	pDC=GetDlgItem(IDC_Bmp)->GetDC();	//将目标DC指向实际位图控件IDC_Bmp

	CBitmap bmp;	//创建后台位图
	bmp.CreateCompatibleBitmap(pDC,900,380);	//根据实际位图控件为后台位图分配内存空间

	CDC bDC;  //创建后台DC
	bDC.CreateCompatibleDC(pDC);	//根据实际DC为后台DC分配内存空间
	
	bDC.SelectObject(&bmp);		//将后台DC与后台位图联系起来，即后台DC选好后台位图

//-------------------------------------------------------------------
//建立剪裁区
	CRgn rgn;
	rgn.CreateRectRgn(0,0,900,380);  //创建一个矩形裁剪区，对象为rgn
	bDC.SelectClipRgn(&rgn);		//选择该裁剪区，绘图在此裁剪区中完成，超出部分不显示

//--------------------------------------------------------------------------------------------
//画背景
	CBrush   brush(RGB(128,128,128));     
	CBrush     *old   =   bDC.SelectObject(&brush);    
	CRect   rect; 
	rect.SetRect(0,0,900,380);
	bDC.Rectangle(rect);
	bDC.SelectObject(old);

//--------------------------------------------------------------------------------------------
//Draw Circle use brush
	CBrush   brush1(RGB(255,0,0));    //red 
	old   =   bDC.SelectObject(&brush1);    
	CRect   cRect;    
	cRect.SetRect(m_IObuffer.USB_Buffer[0],m_IObuffer.USB_Buffer[0],m_IObuffer.USB_Buffer[0],m_IObuffer.USB_Buffer[0]);  //圆心是USBbuffer第一个字节数据 
	cRect.InflateRect(50,50);        //半径是50 
	bDC.Ellipse(cRect);    
	bDC.SelectObject(old);
	
	CBrush   brush2(RGB(255,255,0));    //yellow 
	old   =   bDC.SelectObject(&brush2);      
	cRect.SetRect(m_IObuffer.USB_Buffer[1],m_IObuffer.USB_Buffer[1],m_IObuffer.USB_Buffer[1],m_IObuffer.USB_Buffer[1]);  //圆心是USBbuffer第二个字节数据  
	cRect.InflateRect(30,30);        //半径是30 
	bDC.Ellipse(cRect);    
	bDC.SelectObject(old); 

//***********************************************************************************************
//将后台画好的图像在显示器的目标控件中实际显示出来，以下操作完成真正在显示器上显示的操作
//***********************************************************************************************

	pDC->BitBlt(0,0,900, 380, &bDC, 0, 0, SRCCOPY);

//-----------------------------------------------------
//change led status

	i = ~i;

	break;
	}

case 2:			//Timer2的实际操作——画线
	{

	SI_STATUS status = SI_SUCCESS;

	// Confirm an error hasn't already occurred
	if ( (m_bReadError == TRUE) || (m_bWriteError == TRUE) )
	{
		// Call base timer
		CDialog::OnTimer(nIDEvent);

		// Further processing not possible
		return;		
	}

//-----------------------------------------------------
//发送指令给MCU
//-----------------------------------------------------
	m_IObuffer.USB_Buffer[0] = j;
	m_IObuffer.USB_Buffer[1] = j;		//change led status
	m_IObuffer.USB_Buffer[3] = 1;		//send I2C read command
		
//USB data transmission

	DWORD dwBytesSucceed = 0;
	DWORD dwBytesWriteRequest = (sizeof(USB_iobuf)-4);
	DWORD dwBytesReadRequest = (sizeof(USB_iobuf)-4);

// Init. before write
	dwBytesSucceed = 0;

// Perform USB Data Transfer
// Write transfer packet
	status = SI_Write(m_hUSBDevice, &m_IObuffer, dwBytesWriteRequest, &dwBytesSucceed);

	if (dwBytesSucceed != dwBytesWriteRequest || status != SI_SUCCESS)
	{
		m_bWriteError = TRUE;	// Note: Set error flag immediately so that multiple 
								// message boxes do not queue up.
		CString sError;
		sError.Format("Error writing to USB.\nWrote %d of %d bytes.\n\nApplication is aborting.\nReset hardware and try again.", dwBytesSucceed, dwBytesWriteRequest);
		if (AfxMessageBox(sError,MB_OK|MB_ICONEXCLAMATION))
		{
			OnCancel();
			return;
		}
	}

//--------------------------------------------
//Read I2C Data from USB
//--------------------------------------------

// Init. before read
	dwBytesSucceed = 0;

	memset(&m_IObuffer, 0, sizeof(USB_iobuf));

// Read transfer packet
	status = SI_Read(m_hUSBDevice, &m_IObuffer, dwBytesReadRequest, &dwBytesSucceed);

	if (((dwBytesSucceed != dwBytesReadRequest) && (m_bReadError == FALSE)) || status != SI_SUCCESS)
	{
		m_bReadError = TRUE;	// Note: Set error flag immediately so that multiple 
								// message boxes do not queue up.

		CString sError;
		sError.Format("Error reading from USB.\nRead %d of %d bytes.\n\nApplication is aborting.\nReset hardware and try again.", dwBytesSucceed, dwBytesReadRequest);
		if (AfxMessageBox(sError,MB_OK|MB_ICONEXCLAMATION))
		{
			OnCancel();
			return;
		}
	}


//****************************************************************
//绘图操作，以下绘图均在后台完成，图像不会在屏幕上显示
//****************************************************************

//----------------------------------------------------------------
//设置后台环境
//----------------------------------------------------------------
	
	CDC *pDC;		//创建目标DC指针
	pDC=GetDlgItem(IDC_Bmp)->GetDC();	//将目标DC指向实际位图控件IDC_Bmp

	CBitmap bmp;	//创建后台位图
	bmp.CreateCompatibleBitmap(pDC,900,380);	//根据实际位图控件为后台位图分配内存空间

	CDC bDC;  //创建后台DC
	bDC.CreateCompatibleDC(pDC);	//根据实际DC为后台DC分配内存空间
	
	bDC.SelectObject(&bmp);		//将后台DC与后台位图联系起来，即后台DC选好后台位图

//-------------------------------------------------------------------
//建立剪裁区
	CRgn rgn;
	rgn.CreateRectRgn(0,0,900,380);  //创建一个矩形裁剪区，对象为rgn
	bDC.SelectClipRgn(&rgn);		//选择该裁剪区，绘图在此裁剪区中完成，超出部分不显示

//--------------------------------------------------------------------------------------------
//画背景
	CBrush   brush(RGB(128,128,128));     
	CBrush     *old   =   bDC.SelectObject(&brush);    
	CRect   rect; 
	rect.SetRect(0,0,900,380);
	bDC.Rectangle(rect);
	bDC.SelectObject(old);

//--------------------------------------------------------------------------------------------
//draw line
//Setting the pen
	CPen Pen;
	Pen.CreatePen(PS_SOLID, 10, RGB(0, 0, 255));
	CPen* Penold=bDC.SelectObject(&Pen);

	bDC.MoveTo(m_IObuffer.USB_Buffer[1],m_IObuffer.USB_Buffer[1]);
	bDC.LineTo(m_IObuffer.USB_Buffer[2],m_IObuffer.USB_Buffer[2]);
	
	bDC.MoveTo(m_IObuffer.USB_Buffer[2],m_IObuffer.USB_Buffer[2]);
	bDC.LineTo(850,380);

//***********************************************************************************************
//将后台画好的图像在显示器的目标控件中实际显示出来，以下操作完成真正在显示器上显示的操作
//***********************************************************************************************

	pDC->BitBlt(0,0,900, 380, &bDC, 0, 0, SRCCOPY);	
	
//change led status
	j = ~ j;
	
	break;
	}

	default: break;

}
	
//	CDialog::OnTimer(nIDEvent);
}

void CTabPage2::OnStopDraw() 
{
	// TODO: Add your control notification handler code here
	
	KillTimer(1);
	KillTimer(2);
	Invalidate(TRUE);		//清屏操作
}</span>
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