带矩阵键盘的单片机数字时钟的设计与仿真汇编(3)

汇编版矩阵键盘电子钟设计,带全部注释

JIA: CLR TF0

MOV A,65H

CJNE A,#9,JIA1 ;不等于9转

MOV 65H,0

MOV A,64H

CJNE A,#5,JIA10 ;不等于5转

MOV 64H,#0 ;超过59秒置0

MOV A,63H

CJNE A,#9,JIA100 ;不等于9转

MOV 63H,#0

MOV A,62H

CJNE A,#5,JIA1000 ;不等于5转

MOV 62H,#0 ;超过59分置0

MOV A,61H

CJNE A,#9,JIA10000 ;;不等于9转

MOV 61H,#0 ;超过9点时个位置0

MOV A,60H

CJNE A,#2,JIA100000 ;不等于2转

MOV 60H,#0 ;时 十位超过2置0

AJMP XS0

P100: ; 清零停止

CLR TR0 ;停止定时器

MOV 60H,#0 ;依次给时分秒清零

MOV 61H,#0

MOV 62H,#0

MOV 63H,#0

MOV 64H,#0

MOV 65H,#0