📄 第四章 keil c51高级编程.htm
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lang=EN-US>8051硬件堆栈指针</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 45pt; TEXT-INDENT: -21pt; TEXT-ALIGN: left; tab-stops: list 45.0pt left 63.0pt; mso-list: l36 level1 lfo10"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: Wingdings">l<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">向<SPAN
lang=EN-US>main( )函数交权</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoBodyTextFirstIndent>开发人员可修改以下数据从而对系统初始化</P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-spacerun: yes"> </SPAN>常数名</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-spacerun: yes"> </SPAN>意义</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">IDATALEN<SPAN
style="mso-tab-count: 1">
</SPAN>待清内部RAM长度</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">XDATA START<SPAN
style="mso-tab-count: 1">
</SPAN>指定待清外部RAM起始地址</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">XDATALEN<SPAN
style="mso-tab-count: 1">
</SPAN>待清外部RAM长度</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">IBPSTACK<SPAN
style="mso-tab-count: 1">
</SPAN>是否小模式重入堆栈指针需初始化标志，1为需要。缺省为0<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">IBPSTACKTOP<SPAN
style="mso-tab-count: 1">
</SPAN>指定小模式重入堆栈顶部地址</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">XBPSTACK<SPAN
style="mso-tab-count: 1">
</SPAN>是否大模式重入堆栈指针需初始化标志，缺省为0<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">XBPSTACKTOP<SPAN
style="mso-tab-count: 1">
</SPAN>指定大模式重入堆栈顶部地址</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">PBPSTACK<SPAN
style="mso-tab-count: 1">
</SPAN>是否Compact重入堆栈指针，需初始化标志，缺省为0<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">PBPSTACKTOP<SPAN
style="mso-tab-count: 1">
</SPAN>指定Compact模式重入堆栈顶部地址</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">PPAGEENABLE<SPAN
style="mso-tab-count: 1">
</SPAN>P2初始化允许开关</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">PPAGE<SPAN
style="mso-tab-count: 2">
</SPAN>指定P2值</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">PDATASTART<SPAN
style="mso-tab-count: 1">
</SPAN>待清外部RAM页首址</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">PDATALEN<SPAN
style="mso-tab-count: 1">
</SPAN>待清外部RAM页长度</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoBodyTextFirstIndent>提示：如果要初始化<SPAN
lang=EN-US>P2作为紧凑模式高端地址，必须：PPAGEENAGLE＝1，PPAGE为P2值，例如指定某页1000H－10FFH，则PPAGE＝10H，而且连接时必须如下：</SPAN></P>
<P class=MsoBodyTextFirstIndent><SPAN lang=EN-US>L51<input
modules> PDATA(1080H)，其中1080H是1000H－10FFH中的任一个值。</SPAN></P>
<P class=MsoBodyTextFirstIndent>以下是<SPAN
lang=EN-US>STARTUP.A51代码片断，红色是经常可能需要修改的地方：</SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;------------------------------------------------------------------------------<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<SPAN
style="mso-spacerun: yes"> </SPAN>This file is part of
the C51 Compiler package<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<SPAN
style="mso-spacerun: yes"> </SPAN>Copyright KEIL
ELEKTRONIK GmbH 1990<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;------------------------------------------------------------------------------<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<SPAN
style="mso-spacerun: yes"> </SPAN>STARTUP.A51:<SPAN
style="mso-spacerun: yes"> </SPAN>This code is executed
after processor reset.<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<SPAN
style="mso-spacerun: yes"> </SPAN>To translate this file
use A51 with the following invocation:<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 63.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">;<SPAN
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