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📄 ds18b20

📁 一个针灸治疗仪源代码,包括记时,显示AD采样程序,开发环境keil.使用的芯片PLC89C935
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>DS18B20测量温度</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<META content="MSHTML 6.00.2900.2144" name=GENERATOR>
<META content=FrontPage.Editor.Document name=ProgId></HEAD>
<BODY>
<P><SPAN lang=EN-US 
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">DS18B20采用9或12个位来表示被测量点的温度，通过单一根线和控制器进行信息通讯。温度读取，温度测量和温度设置等所需的能源也都可以数据线上获取而无须另加电源。由于每个DS18B20内部都设有一个独一的序列号，所以多个DS18B20可以共存与同一条线上。<O:P> 
</O:P></SPAN></P>
<P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">表<SPAN 
lang=EN-US>1-1<SPAN style="mso-spacerun: yes">&nbsp; 
</SPAN>DS18B20内部暂存寄存器分布<O:P> </O:P></SPAN></SPAN></P>
<TABLE 
style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-top-alt: solid gray 1.5pt; mso-border-bottom-alt: solid gray 1.5pt; mso-padding-alt: 0pt 5.4pt 0pt 5.4pt" 
cellSpacing=0 cellPadding=0 border=1>
  <TBODY>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: gray 1.5pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: gray 0.75pt solid; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">寄存器内容<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: gray 1.5pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: gray 0.75pt solid; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">字节地址<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt; mso-border-top-alt: solid gray .75pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">温度低字节<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt; mso-border-top-alt: solid gray .75pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">0<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">温度高字节<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">1<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">高温限值<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">2<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">低温限值<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">3<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">设置寄存器<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">4<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">保留<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">5<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">保留<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">6<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">保留<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: medium none; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">7<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR style="HEIGHT: 18pt">
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 104.4pt; PADDING-TOP: 0pt; BORDER-BOTTOM: gray 1.5pt solid; HEIGHT: 18pt" 
    vAlign=top width=139>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">CRC校验<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 63pt; PADDING-TOP: 0pt; BORDER-BOTTOM: gray 1.5pt solid; HEIGHT: 18pt" 
    vAlign=top width=84>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">8<O:P> 
      </O:P></SPAN></P></TD></TR></TBODY></TABLE>
<P><SPAN 
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">设置寄存器的内容用于确定温度值的数字转换分辨率。该字节各位的意义如下：<SPAN 
lang=EN-US><O:P> </O:P></SPAN></SPAN></P>
<TABLE width="70%" border=1>
  <TBODY>
  <TR>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 0.5pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 213pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid" 
    vAlign=top colSpan=4>
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