www.gusucode.com > VC++串口控件实现温度数据的采集并显示，做出曲线 > VC++串口控件实现温度数据的采集并显示，做出曲线/softhy.net/串口温度数据采集并实时显示/src/commDlg.cpp

    // commDlg.cpp : implementation file
// Download by http://www.codefans.net

#include "stdafx.h"
#include "comm.h"
#include "commDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
int LineHight[122];
int LHTemp[120];
CString DTemp;
int LineNum=0;
int NextTime;
int RightLeftNum=0;
int check='n';
int gogo=0;
int speed=9600;
int tab=0;
CString FilePath="c:\\data.txt";

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCommDlg dialog

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

void CCommDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCommDlg)
	DDX_Control(pDX, IDC_STOPRECV, m_stop);
	DDX_Control(pDX, IDC_COMSEEPED, m_speed);
	//DDX_Control(pDX, IDC_HEX, m_hex);
	DDX_Control(pDX, IDC_COMSELECT, m_com);
	DDX_Control(pDX, IDC_MSCOMM1, m_Comm);
	DDX_Text(pDX, IDC_EDIT2, m_ReceiveData);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCommDlg, CDialog)
	//{{AFX_MSG_MAP(CCommDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_CBN_SELENDOK(IDC_COMSELECT, OnComselect)
	ON_CBN_SELENDOK(IDC_COMSEEPED, OnComspeed)
	ON_BN_CLICKED(IDC_STOPRECV, OnStoprecv)
	ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
	ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
	ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
	ON_BN_CLICKED(IDC_BUTTON7, OnButton7)
	ON_BN_CLICKED(IDC_BUTTON8, OnButton8)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCommDlg message handlers

BOOL CCommDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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
	
	// TODO: Add extra initialization here
	m_com.SetCurSel(0);
	m_speed.SetCurSel(2);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCommDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.
// 画图函数
// 算法:运用LineTo函数把120个点连成折线
void CCommDlg::OnPaint() 
{
	int hoc;
	if (NextTime<600 && stop==FALSE) hoc = 600;
	else hoc = NextTime;
	CString TabStr="";
	CPaintDC dc(this);
	dc.GetNearestColor(RGB(255,0,0));
	dc.MoveTo(108,250);
	if (NextTime<=600 && stop==FALSE)
	for (int i=0;i<(NextTime/5);i++)
	{
		dc.LineTo(108+(5*i),250-LineHight[i]);
	}
	else
	for (int i=0;i<121;i++)
	{
		dc.LineTo(108+(5*i),250-LineHight[i]);
	}
	TabStr.Format("%d",hoc/5-120);
	SetDlgItemText(IDC_TAB1,TabStr);
	TabStr.Format("%d",hoc/5-100);
	SetDlgItemText(IDC_TAB2,TabStr);
	TabStr.Format("%d",hoc/5-80);
	SetDlgItemText(IDC_TAB3,TabStr);
	TabStr.Format("%d",hoc/5-60);
	SetDlgItemText(IDC_TAB4,TabStr);
	TabStr.Format("%d",hoc/5-40);
	SetDlgItemText(IDC_TAB5,TabStr);
	TabStr.Format("%d",hoc/5-20);
	SetDlgItemText(IDC_TAB6,TabStr);
	TabStr.Format("%d",hoc/5);
	SetDlgItemText(IDC_TAB7,TabStr);
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CCommDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

BEGIN_EVENTSINK_MAP(CCommDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CCommDlg)
	ON_EVENT(CCommDlg, IDC_MSCOMM1, 1 /* OnComm */, OnComm, VTS_NONE)
	//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

void CCommDlg::OnComm() 
{
	if(stop)return;
	VARIANT m_input1;
	COleSafeArray m_input2;
	long length,i;
	BYTE data[600];
	CString str;
	if(m_Comm.GetCommEvent()==2)//接收缓冲区内有字符
	{
		m_input1=m_Comm.GetInput();//读取缓冲区内的数据
		m_input2=m_input1;//将VARIANT型变量转换为ColeSafeArray型变量
		length=m_input2.GetOneDimSize();//确定数据长度
		for(i=0;i<length;i++)
		m_input2.GetElement(&i,data+i);//将数据转换为BYTE型数组

		for(i=0;i<length;i++)//将数组转换为Cstring型变量
		{
			CFile file;
			CString tempstr;
			BYTE a=* (char *)(data+i);
			BYTE b=* (char *)(data+(++i));
			float c=(float)a+(float)(b%10)/10;
			str.Format("%2.1f ",c);//将a格式化
			if (str.GetLength()<5) str="0"+str;
			str = str.Right(5);
			m_ReceiveData+=str;//将刚采集的数加到编辑框中
			LineHight[121]=a;
			Display();//对数据显示前的处理
			//将数据保存到文件中
			if (m_ReceiveData.GetLength()>=600)//600个字符刚好对应120个数据
			{
				CStdioFile readfile; 
				CString readstr,readstr2;
				if(readfile.Open(FilePath,CFile::modeRead))
				{
					while(readfile.ReadString(readstr))//逐行查询，至到文件尾
					{
						readstr2+=readstr;
					}
					readfile.Close();
				}

				if (file.Open(FilePath,CFile::modeCreate|CFile::modeReadWrite))
				{
					file.Write(readstr2,readstr2.GetLength());//原来的数据
 					file.Write(m_ReceiveData,600);//写入新的120个数据
					file.Close();
					m_ReceiveData="";//清除编辑框内容
					break;
				}
			}
		}
	}
	UpdateData(FALSE);//更新编辑框内容
}

//开串口程序
void CCommDlg::OnButton1() 
{
	if( !m_Comm.GetPortOpen())
	{
		m_Comm.SetPortOpen(TRUE);//打开串口
		SetDlgItemText(IDC_BUTTON1,"关闭串口");
	}
	else
	{
		m_Comm.SetPortOpen(FALSE);
		SetDlgItemText(IDC_BUTTON1,"打开串口");
	}
}

//清除编辑框内容程序
void CCommDlg::OnButton2() 
{
	m_ReceiveData.Empty();//清除接收对话框中的数据
	UpdateData(FALSE);
}

//选择那一个串口程序
void CCommDlg::OnComselect() 
{
	if(m_Comm.GetPortOpen())
	m_Comm.SetPortOpen(FALSE);
	m_Comm.SetCommPort(m_com.GetCurSel()+1);
}

//选择波特率
void CCommDlg::OnComspeed() 
{
	CString temp;
	int i=m_speed.GetCurSel();
	switch(i)
	{
	case 0:
		speed=2400;
		break;
	case 1:
		speed=4800;
		break;
	case 2:
		speed=9600;
		break;
	case 3:
		speed=19200;
		break;
	case 4:
		speed=38400;
		break;
	}
	temp.Format("%d,n,8,1",speed);
	m_Comm.SetSettings(temp);
}

//停止/继续程序
void CCommDlg::OnStoprecv()
{
	if (stop==TRUE)
	{
		NextTime=gogo;
		m_ReceiveData=DTemp;
		for (int i=0;i<120;i++) LineHight[i]=LHTemp[i];
	}
	stop=!stop;
	if (stop==TRUE) SetDlgItemText(IDC_STOPRECV,"继续显示");
	else  SetDlgItemText(IDC_STOPRECV,"停止显示");
}

//对数据显示前的处理:将新数年据加到左边,原来的右移一位
void CCommDlg::Display()
{
	if (NextTime <= 600 && stop==FALSE)
	{
		LineHight[NextTime/5] = LineHight[121];
	}
	else
	{
		for (int i=0;i<120;i++)
		{
			LineHight[i] = LineHight[i+1];
		}
		LineHight[120]=LineHight[121];
	}
	NextTime = NextTime+5;
	this->Invalidate();
	return;
}

//以下四个函数是查看原来数据的程序
void CCommDlg::OnButton5() 
{
	if (stop==FALSE)
	{
		gogo=NextTime;
		DTemp=m_ReceiveData;
		for (int i =0;i<120;i++) LHTemp[i]=LineHight[i];
	}
	stop=TRUE;//关闭接收数据,使显示区和数据区用来为显示原来数据用
	SetDlgItemText(IDC_STOPRECV,"继续显示");
	//先取出文件中的数据,放入一个数组中
	CStdioFile file;
	if(file.Open(FilePath,CFile::modeRead))
	{
		CString str;
		CString instr;
		CString outstr;
		CString sss;
		int i;
		while(file.ReadString(str))//逐行查询，至到文件尾
		{
			instr+=str;
	    }
		if (NextTime>instr.GetLength()-600) NextTime=instr.GetLength()-600;	
		for (i=0;i<120;i++)//取出起点后的120个数据
		{
			sss=instr[NextTime];
			sss+=instr[NextTime+1];
			outstr+=sss+instr[NextTime+2]+instr[NextTime+3]+" ";
			LineHight[i]=atoi(sss);
			NextTime=NextTime+5;
		}
		m_ReceiveData=outstr;
		UpdateData(FALSE);//更新编辑框内容
		this->Invalidate();//更新图相
	}
}

void CCommDlg::OnButton4() 
{
	if (stop==FALSE)
	{
		gogo=NextTime;
		DTemp=m_ReceiveData;
		for (int i =0;i<120;i++) LHTemp[i]=LineHight[i];
	}
	stop=TRUE;
	SetDlgItemText(IDC_STOPRECV,"继续显示");
	NextTime=NextTime-1200;//向后
	if (NextTime<0) NextTime=0;
	CStdioFile file;
	if(file.Open(FilePath,CFile::modeRead))
	{
		CString str;
		CString instr;
		CString outstr;
		CString sss;
		int i;
		while(file.ReadString(str))//逐行查询，至到文件尾
		{
			instr+=str;
	    }
		
		for (i=0;i<120;i++)
		{
			sss=instr[NextTime];
			sss+=instr[NextTime+1];
			outstr+=sss+instr[NextTime+2]+instr[NextTime+3]+" ";
			LineHight[i]=atoi(sss);
			NextTime=NextTime+5;
		}
		m_ReceiveData=outstr;
		UpdateData(FALSE);
		this->Invalidate();
	}
}

void CCommDlg::OnButton6() 
{
	if (stop==FALSE)
	{
		gogo=NextTime;
		DTemp=m_ReceiveData;
		for (int i =0;i<120;i++) LHTemp[i]=LineHight[i];
	}
	stop=TRUE;
	SetDlgItemText(IDC_STOPRECV,"继续显示");
	NextTime=NextTime-605;//向后
	if (NextTime<0) NextTime=0;
	CStdioFile file;
	if(file.Open(FilePath,CFile::modeRead))
	{
		CString str;
		CString instr;
		CString outstr;
		CString sss;
		int i;
		while(file.ReadString(str))//逐行查询，至到文件尾
		{
			instr+=str;
	    }
		
		for (i=0;i<120;i++)
		{
			sss=instr[NextTime];
			sss+=instr[NextTime+1];
			outstr+=sss+instr[NextTime+2]+instr[NextTime+3]+" ";
			LineHight[i]=atoi(sss);
			NextTime=NextTime+5;
		}
		m_ReceiveData=outstr;
		UpdateData(FALSE);
		this->Invalidate();
	}
}

void CCommDlg::OnButton7() 
{
	if (stop==FALSE)
	{
		gogo=NextTime;
		DTemp=m_ReceiveData;
		for (int i =0;i<120;i++) LHTemp[i]=LineHight[i];
	}
	stop=TRUE;//关闭接收数据,使显示区和数据区用来为显示原来数据用
	if (NextTime==0) NextTime=595;
	NextTime=NextTime-595;
	SetDlgItemText(IDC_STOPRECV,"继续显示");
	//先取出文件中的数据,放入一个数组中
	CStdioFile file;
	if(file.Open(FilePath,CFile::modeRead))
	{
		CString str;
		CString instr;
		CString outstr;
		CString sss;
		int i;
		while(file.ReadString(str))//逐行查询，至到文件尾
		{
			instr+=str;
	    }
		if (instr.GetLength()>=600 && NextTime>instr.GetLength()-600) NextTime=instr.GetLength()-600;	
		for (i=0;i<120;i++)//取出起点后的120个数据
		{
			sss=instr[NextTime];
			sss+=instr[NextTime+1];
			outstr+=sss+instr[NextTime+2]+instr[NextTime+3]+" ";
			LineHight[i]=atoi(sss);
			NextTime=NextTime+5;
		}
		m_ReceiveData=outstr;
		UpdateData(FALSE);//更新编辑框内容
		this->Invalidate();//更新图相
	}
}

void CCommDlg::OnButton8() 
{
	if (stop==TRUE)
	{
		m_ReceiveData=DTemp;
		NextTime=gogo;
		if (NextTime<600) NextTime=600;
		for (int i=0;i<120;i++) LineHight[i]=LHTemp[i];
		UpdateData(FALSE);//更新编辑框内容
		this->Invalidate();//更新图相
	}
}