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<?xml version="1.0" encoding="gb2312"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"/><title>一套嵌入式系统的题做做看! (转载)       turbolinux </title></head><body><center><h1>BBS 水木清华站∶精华区</h1></center><a name="top"></a>发信人:&nbsp;flowerwind&nbsp;(windflower),&nbsp;信区:&nbsp;Embedded&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />标&nbsp;&nbsp;题:&nbsp;一套嵌入式系统的题做做看!&nbsp;(转载)&nbsp;<br />发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Wed&nbsp;Nov&nbsp;&nbsp;7&nbsp;23:28:56&nbsp;2001)&nbsp;<br />&nbsp;<br />【&nbsp;以下文字转载自&nbsp;DCST&nbsp;讨论区&nbsp;】&nbsp;<br />发信人:&nbsp;flowerwind&nbsp;(windflower),&nbsp;信区:&nbsp;DCST&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />标&nbsp;&nbsp;题:&nbsp;一套嵌入式系统的题做做看!&nbsp;(转载)&nbsp;<br />发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Wed&nbsp;Nov&nbsp;&nbsp;7&nbsp;23:25:18&nbsp;2001)&nbsp;<br />&nbsp;<br />发信人:&nbsp;flowerwind&nbsp;(windflower),&nbsp;信区:&nbsp;CSArch&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />标&nbsp;&nbsp;题:&nbsp;一套嵌入式系统的题做做看!&nbsp;<br />发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Wed&nbsp;Nov&nbsp;&nbsp;7&nbsp;23:22:57&nbsp;2001)&nbsp;<br />&nbsp;<br />6.&nbsp;(a)&nbsp;What&nbsp;does&nbsp;the&nbsp;keyword&nbsp;&quot;volatile&quot;&nbsp;mean&nbsp;in&nbsp;C&nbsp;programming?&nbsp;<br />(b)&nbsp;Why&nbsp;is&nbsp;this&nbsp;keyword&nbsp;relevant&nbsp;in&nbsp;embedded&nbsp;or&nbsp;real-time&nbsp;computer&nbsp;systems?&nbsp;<br />7.&nbsp;&nbsp;(a)&nbsp;Assume&nbsp;that&nbsp;you&nbsp;have&nbsp;to&nbsp;design&nbsp;a&nbsp;communications&nbsp;interrupt&nbsp;service&nbsp;ro&nbsp;<br />utine&nbsp;that&nbsp;queues&nbsp;received&nbsp;messages&nbsp;in&nbsp;a&nbsp;circular&nbsp;buffer&nbsp;and&nbsp;notifies&nbsp;the&nbsp;ma&nbsp;<br />in&nbsp;executive&nbsp;that&nbsp;data&nbsp;has&nbsp;been&nbsp;received.&nbsp;&nbsp;An&nbsp;independent&nbsp;task&nbsp;in&nbsp;the&nbsp;system&nbsp;<br />&nbsp;will&nbsp;retrieve&nbsp;the&nbsp;messages&nbsp;and&nbsp;process&nbsp;them.&nbsp;&nbsp;Draw&nbsp;a&nbsp;diagram&nbsp;of&nbsp;the&nbsp;softwar&nbsp;<br />e&nbsp;components&nbsp;involved.&nbsp;<br />(b)&nbsp;What&nbsp;variables&nbsp;and&nbsp;storage&nbsp;would&nbsp;you&nbsp;define?&nbsp;<br />(c)&nbsp;What&nbsp;concerns&nbsp;must&nbsp;be&nbsp;addressed&nbsp;in&nbsp;this&nbsp;ISR&nbsp;if&nbsp;there&nbsp;are&nbsp;multiple&nbsp;tasks&nbsp;&nbsp;<br />in&nbsp;the&nbsp;operating&nbsp;system?&nbsp;<br />&nbsp;<br />--&nbsp;<br />&nbsp;<br />※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;smth.org·[FROM:&nbsp;166.111.156.224]&nbsp;<br /><a href="00000002.htm">上一篇</a><a href="javascript:history.go(-1)">返回上一页</a><a href="index.htm">回到目录</a><a href="#top">回到页首</a><a href="00000004.htm">下一篇</a></h1></center><center><h1>BBS 水木清华站∶精华区</h1></center></body></html>
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