📄 lpc2100与ads7844应用笔记--bpe－生物生产装备.htm
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<H2 class=diaryTitle>LPC2100与ADS7844应用笔记-
-</H2>
<P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 16pt"><FONT face="Times New Roman">LPC2100</FONT></SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New
?Times mso-hansi-font-family: Roman?; Times>与</SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-SIZE: 16pt"><FONT face="Times New Roman">ADS7844</FONT></SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New
?Times mso-hansi-font-family: Roman?; Times>应用笔记</SPAN></B><B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 16pt">
<P></SPAN></B></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>
<P><FONT face="Times New Roman" size=3></FONT> </P></SPAN>
<P></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><SPAN style="FONT-FAMILY: 华文楷体"><FONT size=3><FONT
face="Times New Roman">孙刚（<CHSDATE year="2005" month="7" day="1"
islunardate="False" isrocdate="False" w:st="on"><SPAN
lang=EN-US>2005/07/01</SPAN></CHSDATE>）<SPAN lang=EN-US>
<P></SPAN></FONT></FONT></SPAN></P>
<H1
style="MARGIN: 0cm 0cm 0pt 21.25pt; TEXT-INDENT: -21.25pt; LINE-HEIGHT: normal; mso-list: l0 level1 lfo1; tab-stops: list 21.25pt"><SPAN
lang=EN-US style="FONT-SIZE: 14pt; mso-fareast-font-family: " Roman?? New
Times><SPAN style="mso-list: Ignore"><FONT face="Times New Roman">1.<SPAN
style="FONT-WEIGHT: normal; FONT-SIZE: 7pt; LINE-HEIGHT: normal; FONT-STYLE: normal; FONT-VARIANT: normal"
Roman?? New Times>
</SPAN></FONT></SPAN></SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New
?Times mso-hansi-font-family: Roman?; Times>问题提出</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 14pt">
<P></SPAN></H1>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman">ADS7844</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times>是</SPAN><SPAN lang=EN-US><FONT
face="Times New Roman">BB</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times>的一款串行接口的</SPAN><SPAN lang=EN-US><FONT
face="Times New Roman">AD</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times>转换器，具有</SPAN><SPAN lang=EN-US><FONT
face="Times New Roman">12</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?;
Times>位的精度，还具有低功耗使能管脚，因此比较适合在手持仪器中使用。。</SPAN></FONT></P>
<H1
style="MARGIN: 0cm 0cm 0pt 21.25pt; TEXT-INDENT: -21.25pt; LINE-HEIGHT: 20pt; mso-list: l0 level1 lfo1; tab-stops: list 21.25pt; mso-line-height-rule: exactly"><FONT
face="Times New Roman"><SPAN lang=EN-US
style="FONT-SIZE: 14pt; mso-fareast-font-family: " Roman?? New Times><SPAN
style="mso-list: Ignore">2.<SPAN
style="FONT-WEIGHT: normal; FONT-SIZE: 7pt; LINE-HEIGHT: normal; FONT-STYLE: normal; FONT-VARIANT: normal"
Roman?? New Times>
</SPAN></SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 14pt">ADS7844</SPAN></FONT><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New
?Times mso-hansi-font-family: Roman?; Times>介绍</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 14pt">
<P></SPAN></H1>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times><FONT
size=3>比较通用的电路接法如下所示。本应用中就是采用了数据手册中最通用的的接</FONT></SPAN><STRONG><SPAN lang=EN-US
style="FONT-SIZE: 14pt; mso-fareast-font-family: " Roman?? New Times><SPAN
style="mso-list: Ignore"><FONT face="Times New Roman">3.<SPAN
style="FONT-WEIGHT: normal; FONT-SIZE: 7pt; LINE-HEIGHT: normal; FONT-STYLE: normal; FONT-VARIANT: normal"
Roman?? New Times>
</SPAN></FONT></SPAN></SPAN><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New
?Times mso-hansi-font-family: Roman?; Times>应用代码</SPAN></STRONG></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"
align=left><STRONG><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New
?Times mso-hansi-font-family: Roman?; Times></SPAN></STRONG><FONT size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times>下面给出已经验证过的程序。编译器是</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">ADS</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times>。</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times
mso-hansi-font-family: Roman?; Times><FONT size=3>首先是头文件</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#ifndef<SPAN
style="mso-tab-count: 2">
</SPAN>_ADC_H_</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define<SPAN
style="mso-tab-count: 2">
</SPAN>_ADC_H_</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#ifndef _ADC_C</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman"><FONT size=3><SPAN style="mso-spacerun: yes">
</SPAN>#define _ADC_E extern</FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#else</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman"><FONT size=3><SPAN style="mso-spacerun: yes">
</SPAN>#define _ADC_E</FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#endif</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US>
<P><FONT face="Times New Roman" size=3></FONT> </P></SPAN>
<P></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#include "config.h"</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US>
<P><FONT face="Times New Roman" size=3></FONT> </P></SPAN>
<P></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define E445_CHANNEL<SPAN
style="mso-spacerun: yes"> </SPAN>0</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define E670_CHANNEL<SPAN
style="mso-spacerun: yes"> </SPAN>1</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define E800_CHANNEL<SPAN
style="mso-spacerun: yes"> </SPAN>2</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define ER445_CHANNEL 3</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define ER670_CHANNEL 4</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define ER800_CHANNEL 5</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-US><FONT face="Times New Roman">#define AD_TIMES<SPAN
style="mso-spacerun: yes"> </SPAN>3<SPAN
style="mso-spacerun: yes">
</SPAN>//AD</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: "
Roman?? New ?Times mso-hansi-font-family: Roman?;
Times>转换求平均的次数</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-US><FONT face="Times New Roman">#define TRANSFER_DELAY 65530<SPAN
style="mso-spacerun: yes">
</SPAN>//ad</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: "
Roman?? New ?Times mso-hansi-font-family: Roman?;
Times>采样间隔的计数次数</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US>
<P><FONT face="Times New Roman" size=3></FONT> </P></SPAN>
<P></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define AD_E<SPAN
style="mso-spacerun: yes"> </SPAN>(1<<5)<SPAN
style="mso-spacerun: yes"> </SPAN>//P0.5</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define AD_CLK (1<<16)
//P1.16</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define AD_CS<SPAN
style="mso-spacerun: yes"> </SPAN>(1<<31) //P0.31</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define AD_DI<SPAN
style="mso-spacerun: yes"> </SPAN>(1<<4)<SPAN
style="mso-spacerun: yes"> </SPAN>//P0.4</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
face="Times New Roman" size=3>#define AD_DO<SPAN
style="mso-spacerun: yes"> </SPAN>(1<<25) //P1.25</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US>
<P><FONT face="Times New Roman" size=3></FONT> </P></SPAN>
<P></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT
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