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📁 （原创）用周立功LPC2129模拟PS2接口键盘
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<H2 
onclick="changeDiv('b_contant');switchElement('b_contant_t','className')"><SPAN 
class=open id=b_contant_t></SPAN>（原创）用周立功LPC2129模拟PS2接口键盘<SPAN id=BlogArticleID 
style="DISPLAY: none">5006</SPAN><SPAN id=UserID 
style="DISPLAY: none">73782</SPAN> </H2></DIV>
<DIV class=entrybody id=b_contant>
<DIV class=entrydate2><SPAN>2008-6-3 21:31:14 &nbsp;&nbsp; <A class=d 
onclick="checkUser('（原创）用周立功LPC2129模拟PS2接口键盘','http://blog.mcuol.com/Favorites.aspx?title=&amp;url=http://blog.mcuol.com/User/mrzhangzf/Article/5006_1.htm');" 
href="javascript:;">收藏</A> &nbsp;|&nbsp; <A class=d 
href="javascript:doPrint();">打印</A> &nbsp;|&nbsp;<A 
href="http://blog.mcuol.com/User/mrzhangzf/article/5006_1.htm#vote">投票<LABEL 
id=VoteCount></LABEL></A> &nbsp;|&nbsp; <A 
href="http://blog.mcuol.com/User/mrzhangzf/article/5006_1.htm#review">评论<LABEL 
id=CommentCount></LABEL></A> &nbsp;|&nbsp; 阅读<LABEL id=ReadCount></LABEL> 
&nbsp;◇字体：［<A class=d href="javascript:doZoom(16)" target=_self>大</A>&nbsp;<A 
class=d href="javascript:doZoom(14)" target=_self>中</A>&nbsp;<A class=d 
href="javascript:doZoom(12)" target=_self>小</A>］</SPAN></DIV>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l3 level1 lfo1"><FONT 
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>一.</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">项目介绍</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P>
<P class=MsoNormal 
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><FONT 
size=2><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">用周立功的</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>ARM7</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">教学实验板</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>LPC2129</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">实现模拟</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>PS2</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">接口的键盘</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>.</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">要求连续发送</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>20</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">个以字符串时不出现漏码</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>.</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">现市面上的大部分键盘当发送一长串字符时经常出现漏码。所以本项目要求实现并改进键盘</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>.</FONT></SPAN></FONT></P>
<P class=MsoNormal 
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN 
lang=EN-US><o:p><FONT face=Calibri size=2>&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l3 level1 lfo1"><FONT 
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>二.</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">项目所涉及到的知识</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l2 level1 lfo2"><FONT 
size=2><SPAN lang=EN-US 
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>(1)</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN lang=EN-US><FONT face=Calibri>ARM7</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">的基础编程</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>:</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">定时器控制</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>,GPIO</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">控制</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>,</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">中断控制</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>(</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">重点</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>);</FONT></SPAN></FONT></P>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l2 level1 lfo2"><FONT 
size=2><SPAN lang=EN-US 
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>(2)</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN lang=EN-US><FONT face=Calibri>PS2</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">协议</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>;</FONT></SPAN></FONT></P>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><SPAN 
lang=EN-US><SPAN style="mso-spacerun: yes"><FONT face=Calibri 
size=2>&nbsp;&nbsp; </FONT></SPAN></SPAN></P>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l3 level1 lfo1"><FONT 
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>三.</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN lang=EN-US><FONT face=Calibri>PS2</FONT></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">协议介绍及应用</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P>
<P class=MsoListParagraph 
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l1 level1 lfo3"><FONT 
size=2><SPAN lang=EN-US 
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>1.</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">协议特点</SPAN><SPAN 
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P>
<P class=MsoNormal 
style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo4"><FONT 
size=2><SPAN lang=EN-US 
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>(1)</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机总是在总线上有优先权</SPAN><FONT 
face=Calibri> </FONT><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">它可以在任何时候抑制来自于键盘的通讯，只要把时钟拉低即可；</SPAN></FONT></P>
<P class=MsoNormal 
style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo4"><FONT 
size=2><SPAN lang=EN-US 
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>(2)</FONT><SPAN 
style="FONT: 7pt ''''Times New Roman''''">&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN></SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">键盘发送到主机的数据在时钟的下降沿被读取，主机发送到键盘的数据在时钟上升沿被读取；</SPAN></FONT></P>
<P class=MsoNormal 
style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo4"><FONT 
size=2><SPAN lang=EN-US 
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN 
style="mso-list: Ignore"><FONT face=Calibri>(3)</FONT><SPAN
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