serialporttestdlg.cpp

一个可以通过串口读取传感器的亮度信息,然后发送数据到主机中,根据这个值可以来设置我们显示屏的亮度

// SerialPortTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "SerialPortTest.h"
#include "SerialPortTestDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
int nRecvCount = 0;
int CSerialPortTestDlg::HexChar2Int(CString sHex)
{
	int base = 1;
	int l = sHex.GetLength();
	if (l==0)
		return -1;
	else
	{
		int result = 0;
		
		for (int i=1; i<=l; i++)
		{
			if ((sHex[l-i]>='0') && (sHex[l-i]<='9'))
				result = (sHex[l-i]-0x30)*base + result;
			else if((sHex[l-i]>='A')&&(sHex[l-i]<='F'))
				result = (sHex[l-i]-'A'+10)*base + result;
			else if((sHex[l-i]>='a')&&(sHex[l-i]<='f'))
				result = (sHex[l-i]-'a'+10)*base + result;
			else 
				return (-1);
			
			base = base * 16;
		}
		
		return result;
	}
}
CString CSerialPortTestDlg::Convert2HexChar(CString sStr)
{
	CString sResult;
	int l = sStr.GetLength();
	for (int i=0; i<l; i++)
	{
		CString sHex;
		sHex.Format("%X",sStr[i]);
		int n = sHex.GetLength();
		if (n < 2)
		{
			sHex.Insert(0,'0');
			n = sHex.GetLength();
		}
		
		sResult.Insert(sResult.GetLength(), sHex[n-2]);
		sResult.Insert(sResult.GetLength(), sHex[n-1]);
		//sResult.Insert(sResult.GetLength()," ");
	}	
	return sResult;
}

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()

/////////////////////////////////////////////////////////////////////////////
// CSerialPortTestDlg dialog

CSerialPortTestDlg::CSerialPortTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSerialPortTestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSerialPortTestDlg)
	m_strEditReceiveMsg = _T("");
	//}}AFX_DATA_INIT
	m_strEditSendMsg = "F589C7FF20FF0000040000000099";
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_bSerialPortOpened=FALSE; //初始状态：串口没有打开
	
}

void CSerialPortTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSerialPortTestDlg)
	DDX_Control(pDX, IDC_COMBO_COMPORT, m_ctrlComboComPort);
	DDX_Text(pDX, IDC_EDIT_RECEIVEMSG, m_strEditReceiveMsg);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSerialPortTestDlg, CDialog)
	//{{AFX_MSG_MAP(CSerialPortTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_MESSAGE(WM_COMM_RXCHAR, OnComm)
	ON_BN_CLICKED(IDC_BUTTON_OPEN, OnButtonOpen)
	ON_BN_CLICKED(IDC_BUTTON_CLOSE, OnButtonClose)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSerialPortTestDlg message handlers

BOOL CSerialPortTestDlg::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_ctrlComboComPort.SetCurSel(0); //初始选择串口1
	//以下两句分别设置“打开串口”、“关闭串口”两个按状态的使能状态
	GetDlgItem(IDC_BUTTON_OPEN)->EnableWindow(!m_bSerialPortOpened);
	GetDlgItem(IDC_BUTTON_CLOSE)->EnableWindow(m_bSerialPortOpened);
	
    //下面设置定时的对COM设备发送请求查询信息
	SetTimer(1,1000,NULL);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CSerialPortTestDlg::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.

void CSerialPortTestDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

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

LONG CSerialPortTestDlg::OnComm(WPARAM ch, LPARAM port)
{
	nRecvCount++;
	m_strEditReceiveMsg += Convert2HexChar(ch);
	UpdateData(FALSE);  //将接收到的字符显示在接收编辑框中
	
	if(nRecvCount % 15 == 14)
	{
	   int i = int(ch);
	   if(i<3)
		   MessageBox("dingwei");
	   m_Gamma.SetBrightness(NULL,i);
    }
	return 0;
}

void CSerialPortTestDlg::OnButtonOpen() 
{
	// TODO: Add your control notification handler code here
	int nPort=m_ctrlComboComPort.GetCurSel()+1; //得到串口号，想想为什么要加1
	if(m_SerialPort.InitPort(this, nPort, 19200))
	{
		m_SerialPort.StartMonitoring();
		m_bSerialPortOpened=TRUE;
	}
	else
	{
		AfxMessageBox("没有发现此串口或被占用");
		m_bSerialPortOpened=FALSE; 
	}
	GetDlgItem(IDC_BUTTON_OPEN)->EnableWindow(!m_bSerialPortOpened);
	GetDlgItem(IDC_BUTTON_CLOSE)->EnableWindow(m_bSerialPortOpened);
}

void CSerialPortTestDlg::OnButtonClose() 
{
	// TODO: Add your control notification handler code here
	m_SerialPort.ClosePort();//关闭串口
    m_bSerialPortOpened=FALSE;
	GetDlgItem(IDC_BUTTON_OPEN)->EnableWindow(!m_bSerialPortOpened);
	GetDlgItem(IDC_BUTTON_CLOSE)->EnableWindow(m_bSerialPortOpened);	
}

/*void CSerialPortTestDlg::OnButtonSend() 
{
	// TODO: Add your control notification handler code here
   if(!m_bSerialPortOpened) 
		 return; //检查串口是否打开
    	
	int nLen = m_strEditSendMsg.GetLength();	
	BYTE* pBuf = NULL;	

	nLen = nLen/2;
	pBuf = new BYTE[nLen];
	for (int i = 0; i < nLen; i++)
	{
		CString temp;
		temp.Insert(0, m_strEditSendMsg[i * 2]);
		temp.Insert(1, m_strEditSendMsg[i * 2 + 1]);
		*(pBuf+i) = HexChar2Int(temp);
	}		
		
	if (pBuf)
	{
		m_SerialPort.Send((char*)pBuf, nLen);
		delete[] pBuf;
		pBuf = NULL;
	}

}*/
char CSerialPortTestDlg::HexChar(char c)
{
	if((c>='0')&&(c<='9'))
		return c-0x30;
	else if((c>='A')&&(c<='F'))
		return c-'A'+10;
	else if((c>='a')&&(c<='f'))
		return c-'a'+10;
	else 
		return 0x10;

}

void CSerialPortTestDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	 if(!m_bSerialPortOpened) 
		 return; //检查串口是否打开
    	
	int nLen = m_strEditSendMsg.GetLength();	
	BYTE* pBuf = NULL;	

	nLen = nLen/2;
	pBuf = new BYTE[nLen];
	for (int i = 0; i < nLen; i++)
	{
		CString temp;
		temp.Insert(0, m_strEditSendMsg[i * 2]);
		temp.Insert(1, m_strEditSendMsg[i * 2 + 1]);
		*(pBuf+i) = HexChar2Int(temp);
	}		
		
	if (pBuf)
	{
		m_SerialPort.Send((char*)pBuf, nLen);
		delete[] pBuf;
		pBuf = NULL;
	}
	CDialog::OnTimer(nIDEvent);
}