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<H1 id=w_tt>深入浅出VC++串口编程之基于控件</H1>来源：天极开发&nbsp;作者：宋宝华&nbsp;出处：巧巧读书&nbsp;<SPAN 
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<UL>·<A title=深入浅出VC++串口编程之短信应用开发 
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  target=_blank>深入浅出VC++串口编程之短信应用开发</A><BR>·<A title=深入浅出VC++串口编程之第三方类 
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  target=_blank>深入浅出VC++串口编程之DOS的串口编程</A><BR>·<A title=深入浅出SQL之左连接、右连接和全连接 
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<DIV class=left_6_1 
id=w_hzh></DIV><BR>　　2.例程<BR><BR>　　程序的功能和界面（如下图）都与本文连载三中《基于WIN32 
API的串口编程》相同，不同的只是连载三的串口<A href="http://www.qqread.com/z/telecom/hot/index.html" 
target=_blank>通信</A>以API实现，而本节的串口通信则以MSComm控件实现。<BR><BR>
<TABLE width="90%" align=center border=0>
  <TBODY>
  <TR>
    <TD>
      <DIV align=center><IMG alt=深入浅出VC++串口编程之基于控件（图三） 
      src="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_3.jpg" 
  border=0></DIV></TD></TR></TBODY></TABLE><BR>　　使用第1节的方法将控件添加入工程并添加mscomm.h和mscomm.cpp文件后，为了使用控件，我们将控件拖入对话框内任意一个位置（运行时"电话"图标会隐藏），其操作如下图：<BR><BR>
<TABLE width="90%" align=center border=0>
  <TBODY>
  <TR>
    <TD>
      <DIV align=center><A href="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_4.jpg" 
      target=_blank><IMG alt=深入浅出VC++串口编程之基于控件（图四） 
      src="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_4.jpg" 
  border=0></A></DIV></TD></TR></TBODY></TABLE><BR>　　有趣而极富人性化的是我们可以直接右键单击这个"电话"，来设置串口的属性，如下图：<BR><BR>
<TABLE width="90%" align=center border=0>
  <TBODY>
  <TR>
    <TD>
      <DIV align=center><A href="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_5.jpg" 
      target=_blank><IMG alt=深入浅出VC++串口编程之基于控件（图五） 
      src="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_5.jpg" 
  border=0></A></DIV></TD></TR></TBODY></TABLE><BR>　　接着，我们需要为控件添加一个对应的成员变量m_mscom，其对应的变量类型为CMSComm，如下图：<BR><BR>
<TABLE width="90%" align=center border=0>
  <TBODY>
  <TR>
    <TD>
      <DIV align=center><A href="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_6.jpg" 
      target=_blank><IMG alt=深入浅出VC++串口编程之基于控件（图六） 
      src="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_6.jpg" border=0></A><IMG 
      alt=深入浅出VC++串口编程之基于控件（图七） 
      src="深入浅出VC++串口编程之基于控件_QQread_com_files/vz61_7.jpg" 
  border=0></DIV></TD></TR></TBODY></TABLE><BR>　　这样就建立了m_mscom和IDC_MSCOMM1控件的相互映射：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>void CSerialPortActivexDlg::DoDataExchange(CDataExchange* 
      pDX)<BR>{<BR>　CDialog::DoDataExchange(pDX);<BR>　//{{AFX_DATA_MAP(CSerialPortActivexDlg)<BR>　　DDX_Text(pDX, 
      IDC_RECV_EDIT, m_recv);<BR>　　DDX_Text(pDX, IDC_SEND_EDIT, 
      m_send);<BR>　　DDX_Control(pDX, IDC_MSCOMM1, 
      m_mscom);<BR>　//}}AFX_DATA_MAP<BR>}</TD></TR></TBODY></TABLE><BR>　　同时，在对话框的头文件也会由"MFC类向导"自动定义CSerialPortActivexDlg类的CMSComm型成员变量m_mscom：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>CMSComm 
m_mscom;</TD></TR></TBODY></TABLE><BR>　　在对话框初始化时（即在CSerialPortActivexDlg::OnInitDialog函数中）打开串口1：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>BOOL 
      CSerialPortActivexDlg::OnInitDialog()<BR>{<BR>　CDialog::OnInitDialog();<BR><BR>　// 
      Add "About..." menu item to system menu.<BR><BR>　// IDM_ABOUTBOX must be 
      in the system command range.<BR>　ASSERT((IDM_ABOUTBOX &amp; 0xFFF0) == 
      IDM_ABOUTBOX);<BR>　ASSERT(IDM_ABOUTBOX &lt; 0xF000);<BR><BR>　CMenu* 
      pSysMenu = GetSystemMenu(FALSE);<BR>　if (pSysMenu != 
      NULL)<BR>　{<BR>　　CString 
      strAboutMenu;<BR>　　strAboutMenu.LoadString(IDS_ABOUTBOX);<BR>　　if 
      (!strAboutMenu.IsEmpty())<BR>　　{<BR>　　　pSysMenu-&gt;AppendMenu(MF_SEPARATOR);<BR>　　　pSysMenu-&gt;AppendMenu(MF_STRING, 
      IDM_ABOUTBOX, <BR>　　　strAboutMenu);<BR>　　}<BR>　}<BR><BR>　// Set the icon 
      for this dialog. The framework does this automatically<BR>　// when the 
      application's main window is not a dialog<BR>　SetIcon(m_hIcon, TRUE); // 
      Set big icon<BR>　SetIcon(m_hIcon, FALSE); // Set small icon<BR><BR>　// 
      TODO: Add extra initialization here<BR>　m_mscom.SetCommPort(1); 
      //串口1<BR>　m_mscom.SetInBufferSize(1024); //设置输入缓冲区的大小，Bytes 
      <BR>　m_mscom.SetOutBufferSize(512); //设置输入缓冲区的大小，Bytes 
      <BR>　if(!m_mscom.GetPortOpen()) 
      //打开串口<BR>　{<BR>　　m_mscom.SetPortOpen(true); 
      <BR>　}<BR>　m_mscom.SetInputMode(1); //设置输入方式为二进制方式 
      <BR>　m_mscom.SetSettings("9600,n,8,1"); //设置波特率等参数 
      <BR>　m_mscom.SetRThreshold(1); //为1表示有一个字符即引发事件 
      <BR>　m_mscom.SetInputLen(0);<BR><BR>　return TRUE; // return TRUE unless 
      you set the focus to a 
control<BR>}</TD></TR></TBODY></TABLE><BR>　　最核心的发送串口数据函数（"发送"按钮单击事件）如下：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>void CSerialPortActivexDlg::OnSendButton() <BR>{<BR>　// TODO: Add your 
      control notification handler code 
      here<BR>　UpdateData(true);<BR><BR>　CByteArray sendArr; <BR>　<A 
      href="http://www.qqread.com/keys/word/index.html" target=_blank>WORD</A> 
      wLength;<BR><BR>　wLength = 
      m_send.GetLength();<BR>　sendArr.SetSize(wLength);<BR>　for(int i =0; 
      i&lt;wLength; i++)<BR>　{<BR>　　sendArr.SetAt(i, 
      m_send.GetAt(i));<BR>　}<BR>　m_mscom.SetOutput(COleVariant(sendArr));<BR>}</TD></TR></TBODY></TABLE><IMG 
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