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📄 小喇叭的救护车声.htm

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      align=left>;小喇叭的救护车声。<BR><BR>;***************************************************************************<BR>;* 
      (程序转载请著明出处 ,未声明可适应本站腾龙/isp开发套件/倚天版开发套件&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      *<BR>;*&nbsp; E-mail:sxj1974@163.com (51c51 test web)&nbsp; 
      51单片机学习网,自学单片机的网站&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      *<BR>;* Create by :石学军 <A 
      href="http://www.51c51.com/">http://www.51c51.com/</A>&nbsp;&nbsp; 
      www.8951.com 
      更多例程请登陆网站&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
      *<BR>;*************************************************************************** 
      <BR><BR>org 0000h<BR>ajmp main<BR>org 0030h<BR>main:<BR><BR>MOV 
      R2,#08H<BR>DLV1: MOV R3,#0FAH<BR>DLV2: CPL P3.3<BR>LCALL DELAY1 
      ;延时<BR>DJNZ R3,DLV2<BR>DJNZ R2,DLV1<BR>MOV R2,#10H ;改变循环初值<BR><BR>DLV3: 
      MOV R3,#0FAH<BR>DLV4: CPL P3.3<BR>LCALL DELAY2<BR>DJNZ R3,DLV4<BR>DJNZ 
      R2,DLV3<BR>ajmp main<BR>delay1:<BR>mov r7,#00h<BR><BR>LLA: DJNZ 
      R7,LLA<BR>ret<BR><BR>delay2:<BR>mov r7,#128<BR><BR>LLB: DJNZ 
      R7,LLB<BR>ret<BR><BR>end 
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