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      class=style6>-&gt;实时时钟芯片DS1302的C51程序列子</SPAN> </DIV>
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          <TD align=middle width="90%" height=22><SPAN 
            class=style6><STRONG>实时时钟芯片DS1302的C51程序列子</STRONG></SPAN></TD></TR>
        <TR>
          <TD bgColor=#ffffff height=22>2005-12-1 15:09:03 <BR>作者：佚名 
            <BR>/*********************************************************************/<BR>/* 
            实时时钟模块 时钟芯片型号：DS1302 
            */<BR>/*/<BR>/*********************************************************************/<BR>sbit 
            T_CLK = P2^7; /*实时时钟时钟线引脚 */<BR>sbit T_IO = P1^4; /*实时时钟数据线引脚 
            */<BR>sbit T_RST = P1^5; /*实时时钟复位线引脚 
            */<BR>/******************************************************************** 
            <BR>*<BR>* 名称: v_RTInputByte<BR>* 说明: <BR>* 功能: 
            往DS1302写入1Byte数据<BR>* 调用:<BR>* 输入: ucDa 写入的数据 <BR>* 返回值: 
            无<BR>***********************************************************************/<BR>void 
            v_RTInputByte(uchar ucDa) <BR>{ <BR>uchar i;<BR>ACC = 
            ucDa;<BR>for(i=8; i&gt;0; i--)<BR>{<BR>T_IO = ACC0; /*相当于汇编中的 RRC 
            */<BR>T_CLK = 1;<BR>T_CLK = 0;<BR>ACC = ACC &gt;&gt; 1; <BR>} 
            <BR>}<BR>/******************************************************************** 
            <BR>*<BR>* 名称: uchar uc_RTOutputByte<BR>* 说明: <BR>* 功能: 
            从DS1302读取1Byte数据<BR>* 调用: <BR>* 输入: <BR>* 返回值: 
            ACC<BR>***********************************************************************/<BR>uchar
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