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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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      <P align=center><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">MSB<O:P> 
      </O:P></SPAN></P></TD>
    <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: medium none; WIDTH: 213.1pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top colSpan=4>
      <P align=center><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">LSB<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 53.25pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
    vAlign=top width=28>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">TM<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.25pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=65>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">R1<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.25pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=65>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">R0<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.25pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=65>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">1<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.25pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=49>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">1<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.25pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=46>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">1<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.3pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=65>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">1<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 53.3pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    vAlign=top width=65>
      <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></TBODY></TABLE>
<P><SPAN lang=EN-US 
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt"><O:P></O:P></SPAN><SPAN 
lang=EN-US 
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt"><O:P></O:P></SPAN><SPAN 
style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">低五位一直都是<SPAN lang=EN-US>1 
，TM是测试模式位，用于设置DS18B20在工作模式还是在测试模式。在DS18B20出厂时该位被设置为0，用户不要去改动。R1和R0用来设置分辨率，如下表所示：（DS18B20出厂时被设置为12位）三、用户对于DS18B20的访问分为3个步骤：<O:P> 
</O:P></SPAN></SPAN></P>
<TABLE 
style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; WIDTH: 377.6pt; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-padding-alt: 0pt 5.4pt 0pt 5.4pt; mso-border-alt: solid windowtext .5pt" 
cellSpacing=0 cellPadding=0 width=503 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: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">R1<O:P> 
      </O:P></SPAN></P></TD>
    <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: medium none; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">R0<O:P> 
      </O:P></SPAN></P></TD>
    <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: medium none; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">分辨率<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD>
    <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: medium none; WIDTH: 122pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt" 
    width=163>
      <P><SPAN 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">温度最大转换时间<SPAN 
      lang=EN-US><O:P> </O:P></SPAN></SPAN></P></TD></TR>
  <TR>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">0<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">0<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">9位<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 122pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    width=163>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">93.75ms<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">0<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">1<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    width=114>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">10位<O:P> 
      </O:P></SPAN></P></TD>
    <TD 
    style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0pt; BORDER-LEFT: medium none; WIDTH: 122pt; PADDING-TOP: 0pt; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" 
    width=163>
      <P><SPAN lang=EN-US 
      style="FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt">187.5ms<O:P> 
      </O:P></SPAN></P></TD></TR>
  <TR>
    <TD
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