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	   AVR (原ourAVR.com) 技术论坛 -&gt; <a href="javascript:history.go(-1)" class="tt4">返回: 分类清单</a> -&gt; 有人用过cs5522(或5532)吗?
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		  <span class="f06"><font color="#ffffff">贴子主题:有人用过cs5522(或5532)吗?</font></span>
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		   <span class="f06"><font color="#ffffff">回复数:</font><font color="#ffffff">20</font>
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		 <span class="f06"><font color="#444444">相关链接:</font>
		 <font color="#444444">本贴没有相关链接</font></span>
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					【楼主位】 <font color="#000000">rainboyfdy  </font><br>
					
					积分:<font color="#000000">62</font><br>
					派别:<font color="#000000"></font><br>
					等级:<font color="#000000">------</font><br>
					来自:<font color="#000000"></font><br>
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			       <font color="#000000">我想做个最大量程为5V的ADC,有资料吗?我对着DATASHEET看,没看懂,也没个具体的示例。。。。。。编出来的代码好象不行。。。。

<br>各位指点一下。我把代码附上

<br>/*---------------------------------------------------------------*/

<br>void&nbsp;Write_CS5522(uchar&nbsp;byte)&nbsp;/*往CS&nbsp;5522里写入1个字节,高位在前*/

<br>{

<br>&nbsp;&nbsp;SetBit(CS5522_DDR,CS5522_SCLK);//时钟和数据线设置为输出模式

<br>&nbsp;&nbsp;SetBit(CS5522_DDR,CS5522_SDI);

<br>&nbsp;&nbsp;

<br>&nbsp;&nbsp;uchar&nbsp;i;&nbsp;

<br>&nbsp;&nbsp;ClrBit(CS5522_PORT,CS5522_SCLK);&nbsp;//CLOCK为0

<br>&nbsp;&nbsp;for(i=0;i&lt;8;i++)

<br>&nbsp;&nbsp;{

<br>&nbsp;&nbsp;if(byte&amp;0x80)

<br>&nbsp;&nbsp;&nbsp;&nbsp;SetBit(CS5522_PORT,CS5522_SDI);

<br>&nbsp;&nbsp;else&nbsp;ClrBit(CS5522_PORT,CS5522_SDI);

<br>&nbsp;&nbsp;

<br>&nbsp;&nbsp;SetBit(CS5522_PORT,CS5522_SCLK);

<br>&nbsp;&nbsp;ClrBit(CS5522_PORT,CS5522_SCLK);

<br>&nbsp;&nbsp;

<br>&nbsp;&nbsp;byte=byte&lt;&lt;1;

<br>&nbsp;&nbsp;}

<br>

<br>}

<br>/*---------------------------------------------------------------*/

<br>

<br>*---------------------------------------------------------------*/

<br>uchar&nbsp;Read_5522()&nbsp;/*从CS&nbsp;5522里读出1个字节*/

<br>{

<br>&nbsp;&nbsp;SetBit(CS5522_DDR,CS5522_SCLK);//时钟设置为输出模式

<br>&nbsp;&nbsp;ClrBit(CS5522_DDR,CS5522_SDO);&nbsp;//和数据线设置为输入模式,以接收数据

<br>&nbsp;&nbsp;

<br>&nbsp;&nbsp;uchar&nbsp;AD8bit,i;

<br>&nbsp;&nbsp;AD8bit=0;

<br>&nbsp;&nbsp;for(i=0;i&lt;8;i++)

<br>&nbsp;&nbsp;{

<br>&nbsp;&nbsp;&nbsp;if(&nbsp;GetPinValue(CS5522_PORT,CS5522_SDO)/*如果SDO为1*/&nbsp;)AD8bit=(AD8bit|0x01);&nbsp;

<br>&nbsp;&nbsp;&nbsp;AD8bit=(AD8bit&lt;&lt;1);

<br>&nbsp;&nbsp;&nbsp;ClrBit(CS5522_PORT,CS5522_SCLK);

<br>&nbsp;&nbsp;&nbsp;SetBit(CS5522_PORT,CS5522_SCLK);

<br>&nbsp;&nbsp;}

<br>&nbsp;&nbsp;return&nbsp;(AD8bit)&nbsp;;

<br>}

<br>/*---------------------------------------------------------------*/

<br></font>
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		         <img src="bbs_content.jsp_files/pixel.gif" height="1" width="7">2005-09-22,15:44:46
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