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<h1 align="center"><a name="串口调试助手源程序">串口调试助手源程序</a></h1>
<h1 align="center">及编程详细过程（二）</h1>
<p align="center">作者：<a href="mailto:xiaofengstudio@sina.com">龚建伟</a>
2001.8.25</p>
<p align="center">可以任意转载，但必须注明作者和说明来自<a href="http://roaringwind.best.163.com">http://roaringwind.best.163.com</a>，不得作为商用</p>
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<p align="center">目次：</p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">1.建立项目 </font></b></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">2.在项目中插入MSComm控件</font></b><font color="#C0C0C0"><a href="#2.在项目中插入MSComm控件"> </a></font></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">3.利用ClassWizard定义CMSComm类控制变量</font></b></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">4.在对话框中添加控件 </font></b></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">5.添加串口事件消息处理函数OnComm()</font></b></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">6.打开和设置串口参数</font></b></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b><font color="#C0C0C0">7.发送数据</font></b></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><a href="#8.发送十六进制字符">8.发送十六进制字符</a></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><a href="#9.在接收框中以十六进制显示">9.在接收框中以十六进制显示</a></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><a href="#10.如何设置自动发送">10.如何设置自动发送</a></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><a href="#11.什么是VARIANT数据类型？如何使用VARIANT数据类型？">11.什么是VARIANT数据类型？如何使用VARIANT数据类型？</a></p>
<p align="left" style="margin-top: 5; margin-bottom: 5"> </p>
<p align="left" style="margin-top: 5; margin-bottom: 5"><b>
</b></p>
<p align="left"><font color="#000000"> 这是<a href="scommassistantcode.htm">串口调试助手源程序及编程详细过程</a>（一）的续篇，首先谢谢朋友们的支持与鼓励。</font></p>
<p align="left"><b><font color="#000000">
这是更新后适合本文的源程序（2001.8.25制作），如果还没有下载源程序，又对本文有兴趣，请
</font>
</b><font color="#000000"><a href="../download/scommtest02.zip">立即下载
<img border="0" src="../pic/down.gif" width="16" height="16">
</a>（当然，你看完本文也可以自己做出来，这个程序是接着上一个做的，如果你没下载前面程序，则没必要再下载了，本程序全部包含）。</font></p>
<p align="left"> </p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><a name="8.发送十六进制字符"><b><font color="#000000">8.发送十六进制字符</font></b></a></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><font color="#000000">
在主对话框中加入一个复选接钮，ID为IDC_CHECK_HEXSEND Caption: 十六进制发送，再利用ClassWizard为其添加控制变量：m_ctrlHexSend；</font></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><font color="#000000"> 在ClassView中为SCommTestDlg类添加以下两个PUBLIC成员函数，并输入相应代码;</font></p>
<p align="left" style="margin-top: 3; margin-bottom: 3"><font color="#000000"> </font></p>
<blockquote>
<blockquote>
<p align="left" style="margin-top: 3; margin-bottom: 3"><font color="#000000">//由于这个转换函数的格式限制，在发送框中的十六制字符应该每两个字符之间插入一个空隔<br>
//如：A1 23 45 0B 00 29<br>
//CByteArray是一个动态字节数组，可参看MSDN帮助<br>
int CSCommTestDlg::String2Hex(CString str, CByteArray &senddata)<br>
{<br>
int hexdata,lowhexdata;<br>
int hexdatalen=0;<br>
int len=str.GetLength();<br>
senddata.SetSize(len/2);<br>
for(int i=0;i<len;)<br>
{<br>
char lstr,hstr=str[i];<br>
if(hstr==' ')<br>
{<br>
i++;<br>
continue;<br>
}<br>
i++;<br>
if(i>=len)<br>
break;<br>
lstr=str[i];<br>
hexdata=ConvertHexChar(hstr);<br>
lowhexdata=ConvertHexChar(lstr);<br>
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