如何利用单片机的定时溢出中断实现准确延时。使单片机的P1端口连接到一个数码管,使其指定的时间间隔内依次显示0~9。的汇编语言 拜托高手了~感激不尽··
ORG 0000H
LJMP START
ORG 000BH
LJMP INTERRUPT_T0
ORG 0030H
START:
MOV SP,#60H
MOV TMOD,#01H
MOV TH0,#4CH
MOV TL0,#00H
MOV R7,#00H
MOV R6,#00H
SETB ET0
SETB EA
SETB TR0
MOV DPTR,#TAB
MAIN:
MOV A,R6
MOVC A,@A+DPTR
MOV P1,A
LJMP MAIN
INTERRUPT_T0:
MOV TH0,#4CH
MOV TL0,#00H
INC R7
CJNE R7,#20,LOOP1
MOV R7,#00H
INC R6
CJNE R6,#10,LOOP1
MOV R6,#00H
LOOP1:
RETI
TAB:
DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H
END
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