带矩阵键盘的单片机数字时钟的设计与仿真汇编(7)

汇编版矩阵键盘电子钟设计,带全部注释

RL A

MOV 70H,A

MOV P2,70H

MOV A,65H

ADD A,#10;小数点

MOVC A,@A+DPTR

MOV P0,A

LCALL YS1MS

MOV P0,#0FFH

MOV A,70H

RL A

MOV 70H,A

JMP L1

RSCAN:

MOV P1,#00H

MOV P1,#0FH

C1: JNB P1.4,C2 ;扫描第一列

MOV ROW,#00H

LJMP CALCU

C2: JNB P1.5,C3

MOV ROW,#01H

LJMP CALCU

C3: JNB P1.6,C4

MOV ROW,#02H

LJMP CALCU

C4: JNB P1.7,C1

MOV ROW,#03H

CALCU:

MOV A,LINE

MOV B,#04H

MUL AB

ADD A,ROW

PUSH ACC

Z: MOV A,P1