📄 s3c2410上移植的全过程详解.htm
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<h1><a id="Header1_HeaderTitle" href="http://blog.csdn.net/west_609/">west_609的专栏</a></h1><h2>嵌入式 2410 44B0</h2>
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<dt> 林崇<span>ID：west_609</span></dt><dd class="middle"> <img src="http://profile.csdn.net/west_609/picture/1.jpg" alt="" /></dd><dd class="middle"> <a href="http://profile.csdn.net/8/E4/edit.html"></a></dd><dd> 共<em>6099</em>次访问，排名<em>14857(-1)</em>好友<em>7</em>人，关注者<em>7</em>人<br/>I love linux,I love embeded linux, I love ARM</dd><dd> </dd><dt>west_609的文章</dt><dd>原创 14 篇</dd><dd>翻译 0 篇</dd><dd>转载 6 篇</dd><dd>评论 11 篇</dd>
<dt>最近评论</dt><dd>west_609：<a href="http://blog.csdn.net/west_609/archive/2008/05/24/2477733.aspx#851475" Title="点击查看《回复:在ARM9(S3C2440)上实现ZigBee协议--基于CC2420芯片》">回roc: zigbee与802.15.4相兼容的协议,具体它的帧格式可以参照CC2420的datasheet.至于怎么样嵌入到linux系统中的,其实就是你怎么去调用Linux的Api去操作CC2420,其实这个芯片已经提供了对ZigBee协议的硬件支持,所以我认为准确地说是如何根据datasheet操作CC2420.个人的意见,欢迎讨论</a></dd><dd>west_609：<a href="http://blog.csdn.net/west_609/archive/2008/05/24/2477733.aspx#851473" Title="点击查看《回复:在ARM9(S3C2440)上实现ZigBee协议--基于CC2420芯片》">回zenco:linux内核自带的这个文件是SPI的驱动,而我的CC2420与ARM9的接口是一个12针的接口,不仅仅有SPI,还有一些控制线,状态线.因此在设备驱动开发时就要考虑这些,如果在现有的代码上修改我觉得太麻烦了,所以就自己写了一个,它一定既要实现对SPI的驱动,还应该包括一些中断的处理,只有这样才可以与CC2420进行通信.另外我的CC2420是可以正常的通信的.</a></dd><dd>roc：<a href="http://blog.csdn.net/west_609/archive/2008/05/24/2477733.aspx#851168" Title="点击查看《回复:在ARM9(S3C2440)上实现ZigBee协议--基于CC2420芯片》">你好，请问zigbee协议栈怎样嵌入到linux系统中呢？</a></dd><dd>zenco：<a href="http://blog.csdn.net/west_609/archive/2008/05/24/2477733.aspx#850011" Title="点击查看《回复:在ARM9(S3C2440)上实现ZigBee协议--基于CC2420芯片》">你好，请问你的cc2420能正常进行通信了吗？2.6.22内核中有了spi_s3c24xx.c了，不直接使用原始设备驱动，而是使用包装后的抽象设备驱动，不知能否直接在此基础上添加对cc2420的驱动……你能否把你的驱动代码和cc2420的手册发份给我吗？我的邮箱是zenco2@gamil.com,最近搞毕业设计，这方面整不出头绪来，非常感谢。</a></dd><dd>ldder：<a href="http://blog.csdn.net/west_609/archive/2007/10/17/1828437.aspx#830994" Title="点击查看《回复:linux-2.6.14下madplay在S3C2410上移植的全过程详解》">很好！</a></dd>
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<h1><img src="/images/turnship.gif" border="0" width="15" height="14" alt="转载" /> <a href="http://blog.csdn.net/west_609/archive/2007/10/18/1830969.aspx">C/C++的几个经典</a><cite class="fav_csdnstylebykimi"><a href="JavaScript:d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(saveit=window.open('http://wz.csdn.net/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'saveit','scrollbars=no,width=590,height=300,left=75,top=20,status=no,resizable=yes'));saveit.focus();" class="fav_csdnstylebykimi" title="收藏到我的网摘中，并分享给我的朋友">收藏</a></cite></h1>
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<span id="Post.ascx_ViewPost_PreviousAndNextEntriesUp"><h3><a href="http://blog.csdn.net/west_609/archive/2007/10/25/1842827.aspx">新一篇: Spin_lock简介</a> | <a href="http://blog.csdn.net/west_609/archive/2007/10/17/1828437.aspx">旧一篇: linux-2.6.14下madplay在S3C2410上移植的全过程详解</a></h3></span>
<script>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</script><p> </p>
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<p><span>请写出</span> <span>BOOL flag </span><span>与“零值”比较的</span><span> if </span><span>语句。（</span><span>3</span><span>分）</span></p>
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<p><strong><span>标准答案：</span></strong></p>
<p><strong><span><span> </span>if ( flag )</span></strong></p>
<p><strong><span><span> </span>if ( !flag )</span></strong></p>
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<p><span>如下写法均属不良风格，不得分。</span></p>
<p><span><span> </span>if (flag == TRUE)<span> </span></span></p>
<p><span><span> </span>if (flag == 1 )<span> </span><span> </span></span></p>
<p><span><span> </span>if (flag == FALSE) </span></p>
<p><span><span> </span><span> </span>if (flag == 0) <span> </span></span></p>
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<p><span>请写出</span> <span>float x </span><span>与“零值”比较的</span><span> if </span><span>语句。（</span><span>4</span><span>分）</span></p>
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<p><strong><span>标准答案示例：</span></strong></p>
<p><strong><span>const float EPSINON = 0.00001;</span></strong></p>
<p><strong><span>if ((x >= - EPSINON) && (x <= EPSINON)</span></strong></p>
<p><span>不可将浮点变量用“<span>==</span>”或“！<span>=</span>”与数字比较，应该设法转化成“<span>>=</span>”或“<span><=</span>”此类形式。</span></p>
<p><span><span> </span></span></p>
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<p> </p>
<p><span>如下是错误的写法，不得分。</span></p>
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