📄 windows ce的串口通信.htm
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<td align="center" height=32 style="font-size: 12pt;color: #FF6600;">Windows CE的串口通信</td>
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<td align="center" height=12 bgcolor=#F7F7F7>作者：未知 来源：supcode.com收集整理 发布时间：2005-6-29 2:24:07 发布人：mmbb</td>
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<td align="center" height=13 bgcolor=#F7F7F7><a
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<div id="NewaspContentLabel" style="display:block;padding:0px 10px;" class="ContentFont"><FONT id=font_word style="FONT-SIZE: 14px; FONT-FAMILY: 宋体, Verdana, Arial, Helvetica, sans-serif"><p>以前看了很多文档,知道<a target=_blank href=http://www.supcode.com/ class=wordstyle>Windows</a> CE的串口如何操作，但是由于从来没有想过要用串口，也没有实际的作过。昨天有人需要用我们的开发板，而他们主要就是要用串口，我就写了一个程序，用来测试串口是否工作。记录下来，作为以后串口通信程序的起点。</p><p> HANDLE hSer;<br/> hSer = CreateFile (TEXT ("COM1:"), GENERIC_READ | GENERIC_WRITE,</p><p> 0, NULL, OPEN_EXISTING, 0, NULL);<br/> if(hSer == INVALID_HANDLE_VALUE)<br/> {<br/> MessageBox(L"CreateFailed",L"Failed");<br/> return;<br/> }<br/><br/> int RC;<br/> DWORD cByte_send,cByte_written;<br/> char ch[20];<br/> cByte_send = sizeof(ch);<br/> sprintf(ch,"test COM1 good!");<br/> RC=WriteFile(hSer,&ch,cByte_send,&cByte_written,NULL);<br/> WCHAR ret[10];<br/> wsprintf(ret,L"%d",cByte_written);<br/> if(RC)<br/> {<br/> MessageBox(L"Send Ok!");<br/> MessageBox(ret);<br/> CloseHandle(hSer);<br/> return;<br/> }</p><p> wsprintf(ret,L"%d",GetLastError());<br/> MessageBox(ret);<br/> CloseHandle(hSer);</p><p>这部分程序实际上跟对WInCE下大部分流驱动程序的操作方法一样，首先用CreateFile打开该设备，然后用Writefile／ReadFile进行读写，最后用CloseHandle来关闭。该程序没有改变串口的配置信息，如果要修改，应该定义各DCB(Dirver control Block)，然后使用GetCommState/SetCommState来进行读取和修改串口信息。实际上这个函数是对串口驱动IoControl的封装，如果你愿意，你也完全可以直接使用Iocontrol来进行^_^</p></font></div>
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