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ZT: CLR TR0 ;K2°´ÏºóÔÝÍ£¼ÆÊý£¬²¢¹ØÖÐ¶Ï CLR ET0 CLR EA

JB P3.1,$ ;K2Ôٴΰ´Ï¼ÌÐø¼ÆÊý ACALL DELAY30MS JNB P3.1,$

JX: SETB ET0 ;µÚ¶þ´Î°´ÏÂÔÝÍ£¼üºó¼ÌÐøµ¹¼ÆÊ±£¨¼ÌÐøÆô¶¯£© SETB EA SETB TR0

XS: MOV A,R1 ;ÏÔʾ×Ó³ÌÐò MOV B,#10 DIV AB

MOVC A, @A+DPTR

MOV P0,A ; ÏÔʾÃëʮλ MOV A,B MOVC A, @A+DPTR

MOV P2,A ;ÏÔʾÃë¸öλ

CJNE R0,#100,STOP ;1Sʱ¼äµ½·ñ£¬Î´µ½Ö±½ÓתÊýÂë¹ÜÏÔʾ MOV R0,#00H ;1Sʱ¼äµ½£¬R0ÖØ¸³³õÖµ

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DELAY30MS: MOV R6,#150 ;ÑÓʱ³ÌÐò×Ó³ÌÐò AAA: MOV R7,#100 DJNZ R7,$ DJNZ R6,AAA RET

T0_ISR: CLR TR0 ;ÖжϳÌÐò×Ó³ÌÐò MOV TH0,#0D8H MOV TL0,#0EFH INC R0 SETB TR0 RETI

SND: CLR P1.0 ;±¨¾¯³ÌÐò×Ó³ÌÐò£¨ºìÉ«·¢¹â¶þ¼«¹ÜÁÁһϾÍÃ𣩠MOV R7,#0FFH DL: MOV R6,#0FFH DL1: DJNZ R6,DL1 DJNZ R7,DL SETB P1.0 RET

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