单片机练习 - i2c总线协议 - 让生活web个够 - 博客园.htm

AT24c01及DS18B20应用程序,与大家一起分享

border=0><IMG height=335 alt="" 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/AT24C02A.jpg" width=323 
border=0><BR><BR>单片机利用P2.0模拟SDA, P2.1模拟SCL.<BR><BR>程序代码:<BR>
<DIV 
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id=Code_Closed_Image_023706 
onclick="this.style.display='none'; Code_Closed_Text_023706.style.display='none'; Code_Open_Image_023706.style.display='inline'; Code_Open_Text_023706.style.display='inline';" 
height=16 src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ContractedBlock.gif" 
width=11 align=top><IMG id=Code_Open_Image_023706 style="DISPLAY: none" 
onclick="this.style.display='none'; Code_Open_Text_023706.style.display='none'; Code_Closed_Image_023706.style.display='inline'; Code_Closed_Text_023706.style.display='inline';" 
height=16 src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ExpandedBlockStart.gif" 
width=11 align=top><SPAN id=Code_Closed_Text_023706 
style="BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 1px solid; BACKGROUND-COLOR: #ffffff">I2C总线协议</SPAN><SPAN 
id=Code_Open_Text_023706 style="DISPLAY: none"><BR><!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;1</SPAN><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top><SPAN 
style="COLOR: #008000">//</SPAN><SPAN 
style="COLOR: #008000">用软件方法模拟I2C总线协议来读写AT24C02&nbsp;EEPROM<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;2</SPAN><SPAN style="COLOR: #008000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #008000">//</SPAN><SPAN 
style="COLOR: #008000">每次上电后,&nbsp;继续按照上次的计数结果计数,&nbsp;每半秒计数一次</SPAN><SPAN 
style="COLOR: #008000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;3</SPAN><SPAN style="COLOR: #008000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #000000">#include&nbsp;</SPAN><SPAN 
style="COLOR: #000000">&lt;</SPAN><SPAN 
style="COLOR: #000000">reg52.H</SPAN><SPAN 
style="COLOR: #000000">&gt;</SPAN><SPAN style="COLOR: #000000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;4</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" 
align=top>#include&nbsp;</SPAN><SPAN style="COLOR: #000000">&lt;</SPAN><SPAN 
style="COLOR: #000000">intrins.H</SPAN><SPAN 
style="COLOR: #000000">&gt;</SPAN><SPAN style="COLOR: #000000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;5</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;6</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #0000ff">#define</SPAN><SPAN 
style="COLOR: #000000">&nbsp;uchar&nbsp;unsigned&nbsp;char</SPAN><SPAN 
style="COLOR: #000000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;7</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" 
align=top>sbit&nbsp;SDA&nbsp;</SPAN><SPAN style="COLOR: #000000">=</SPAN><SPAN 
style="COLOR: #000000">&nbsp;P2</SPAN><SPAN style="COLOR: #000000">^</SPAN><SPAN 
style="COLOR: #000000">0</SPAN><SPAN style="COLOR: #000000">;<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;8</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" 
align=top>sbit&nbsp;SCL&nbsp;</SPAN><SPAN style="COLOR: #000000">=</SPAN><SPAN 
style="COLOR: #000000">&nbsp;P2</SPAN><SPAN style="COLOR: #000000">^</SPAN><SPAN 
style="COLOR: #000000">1</SPAN><SPAN style="COLOR: #000000">;<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;&nbsp;9</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;10</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #008000">//</SPAN><SPAN 
style="COLOR: #008000">仿真延时5.43us</SPAN><SPAN 
style="COLOR: #008000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;11</SPAN><SPAN style="COLOR: #008000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #0000ff">void</SPAN><SPAN 
style="COLOR: #000000">&nbsp;delay5us()<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;12</SPAN><SPAN style="COLOR: #000000"><IMG 
id=Codehighlighter1_199_211_Open_Image 
onclick="this.style.display='none'; Codehighlighter1_199_211_Open_Text.style.display='none'; Codehighlighter1_199_211_Closed_Image.style.display='inline'; Codehighlighter1_199_211_Closed_Text.style.display='inline';" 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ExpandedBlockStart.gif" 
align=top><IMG id=Codehighlighter1_199_211_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; Codehighlighter1_199_211_Closed_Text.style.display='none'; Codehighlighter1_199_211_Open_Image.style.display='inline'; Codehighlighter1_199_211_Open_Text.style.display='inline';" 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ContractedBlock.gif" 
align=top></SPAN><SPAN id=Codehighlighter1_199_211_Closed_Text 
style="BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 1px solid; BACKGROUND-COLOR: #ffffff"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/dot.gif"></SPAN><SPAN 
id=Codehighlighter1_199_211_Open_Text><SPAN 
style="COLOR: #000000">{<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;13</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;_nop_();<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;14</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ExpandedBlockEnd.gif" 
align=top>}</SPAN></SPAN><SPAN style="COLOR: #000000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;15</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;16</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #008000">//</SPAN><SPAN 
style="COLOR: #008000">延时10ms,&nbsp;仿真约11ms<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;17</SPAN><SPAN style="COLOR: #008000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #008000">//</SPAN><SPAN 
style="COLOR: #008000">实际测试中,&nbsp;对于写一个字节,&nbsp;只须2ms</SPAN><SPAN 
style="COLOR: #008000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;18</SPAN><SPAN style="COLOR: #008000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #0000ff">void</SPAN><SPAN 
style="COLOR: #000000">&nbsp;delay10Ms()<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;19</SPAN><SPAN style="COLOR: #000000"><IMG 
id=Codehighlighter1_273_328_Open_Image 
onclick="this.style.display='none'; Codehighlighter1_273_328_Open_Text.style.display='none'; Codehighlighter1_273_328_Closed_Image.style.display='inline'; Codehighlighter1_273_328_Closed_Text.style.display='inline';" 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ExpandedBlockStart.gif" 
align=top><IMG id=Codehighlighter1_273_328_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; Codehighlighter1_273_328_Closed_Text.style.display='none'; Codehighlighter1_273_328_Open_Image.style.display='inline'; Codehighlighter1_273_328_Open_Text.style.display='inline';" 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ContractedBlock.gif" 
align=top></SPAN><SPAN id=Codehighlighter1_273_328_Closed_Text 
style="BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 1px solid; BACKGROUND-COLOR: #ffffff"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/dot.gif"></SPAN><SPAN 
id=Codehighlighter1_273_328_Open_Text><SPAN 
style="COLOR: #000000">{<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;20</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;uchar&nbsp;a,b;<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;21</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: #0000ff">for</SPAN><SPAN style="COLOR: #000000">(a</SPAN><SPAN 
style="COLOR: #000000">=</SPAN><SPAN style="COLOR: #000000">50</SPAN><SPAN 
style="COLOR: #000000">;a</SPAN><SPAN style="COLOR: #000000">&gt;</SPAN><SPAN 
style="COLOR: #000000">0</SPAN><SPAN style="COLOR: #000000">;a</SPAN><SPAN 
style="COLOR: #000000">--</SPAN><SPAN style="COLOR: #000000">)<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;22</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: #0000ff">for</SPAN><SPAN style="COLOR: #000000">(b</SPAN><SPAN 
style="COLOR: #000000">=</SPAN><SPAN style="COLOR: #000000">100</SPAN><SPAN 
style="COLOR: #000000">;b</SPAN><SPAN style="COLOR: #000000">&gt;</SPAN><SPAN 
style="COLOR: #000000">0</SPAN><SPAN style="COLOR: #000000">;b</SPAN><SPAN 
style="COLOR: #000000">--</SPAN><SPAN style="COLOR: #000000">);<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;23</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ExpandedBlockEnd.gif" 
align=top>}</SPAN></SPAN><SPAN style="COLOR: #000000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;24</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;25</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #008000">//</SPAN><SPAN style="COLOR: #008000">延时2ms</SPAN><SPAN 
style="COLOR: #008000"><BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;26</SPAN><SPAN style="COLOR: #008000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/None.gif" align=top></SPAN><SPAN 
style="COLOR: #0000ff">void</SPAN><SPAN 
style="COLOR: #000000">&nbsp;delay2Ms()<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;27</SPAN><SPAN style="COLOR: #000000"><IMG 
id=Codehighlighter1_355_410_Open_Image 
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src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ExpandedBlockStart.gif" 
align=top><IMG id=Codehighlighter1_355_410_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; Codehighlighter1_355_410_Closed_Text.style.display='none'; Codehighlighter1_355_410_Open_Image.style.display='inline'; Codehighlighter1_355_410_Open_Text.style.display='inline';" 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/ContractedBlock.gif" 
align=top></SPAN><SPAN id=Codehighlighter1_355_410_Closed_Text 
style="BORDER-RIGHT: #808080 1px solid; BORDER-TOP: #808080 1px solid; DISPLAY: none; BORDER-LEFT: #808080 1px solid; BORDER-BOTTOM: #808080 1px solid; BACKGROUND-COLOR: #ffffff"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/dot.gif"></SPAN><SPAN 
id=Codehighlighter1_355_410_Open_Text><SPAN 
style="COLOR: #000000">{<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;28</SPAN><SPAN style="COLOR: #000000"><IMG 
src="单片机练习 - I2C总线协议 - 让生活Web个够 - 博客园_files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;uchar&nbsp;a,b;<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;29</SPAN><SPAN style="COLOR: #000000"><IMG 
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align=top>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: #0000ff">for</SPAN><SPAN style="COLOR: #000000">(a</SPAN><SPAN 
style="COLOR: #000000">=</SPAN><SPAN style="COLOR: #000000">10</SPAN><SPAN 
style="COLOR: #000000">;a</SPAN><SPAN style="COLOR: #000000">&gt;</SPAN><SPAN 
style="COLOR: #000000">0</SPAN><SPAN style="COLOR: #000000">;a</SPAN><SPAN 
style="COLOR: #000000">--</SPAN><SPAN style="COLOR: #000000">)<BR></SPAN><SPAN 
style="COLOR: #008080">&nbsp;30</SPAN><SPAN style="COLOR: #000000"><IMG 
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align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: #0000ff">for</SPAN><SPAN style="COLOR: #000000">(b</SPAN><SPAN 
style="COLOR: #000000">=</SPAN><SPAN style="COLOR: #000000">100</SPAN><SPAN 
style="COLOR: #000000">;b</SPAN><SPAN style="COLOR: #000000">&gt;</SPAN><SPAN 
style="COLOR: #000000">0</SPAN><SPAN style="COLOR: #000000">;b</SPAN><SPAN 
style="COLOR: #000000">--</SPAN><SPAN style="COLOR: #000000">);<BR></SPAN><SPAN