?? 小喇叭的救護車聲.htm
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align=left>;小喇叭的救護車聲。<BR><BR>;***************************************************************************<BR>;*
(程序轉載請著明出處 ，未聲明可適應本站騰龍/isp開發(fā)套件/倚天版開發(fā)套件
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*<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
;延時<BR>DJNZ R3,DLV2<BR>DJNZ R2,DLV1<BR>MOV R2,#10H ;改變循環(huán)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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