Question

单片机汇编语言

怎么两次调用延时子程序？

Answer 1

延时用子程序，加个标号，在需要调用的地方用CALL/LCALL等调用指令，如下程序

ORG 0000H

MOV DPTR,#TAB

MOV P0,#0FFH

LOP:

LOOP0:MOV 20H,#9

MOV R0,#10

LOOP1:MOV A,20H; 9-0

MOVC A,@A+DPTR

MOV P0,A

DEC 20H

CALL DELL;YANSHI

DJNZ R0,LOOP1

MOV 20H,#0;0-9

MOV R0,#10

LOOP2:MOV A,20H; 0-9

MOVC A,@A+DPTR

MOV P0,A

INC 20H

CALL DELL;YANSHI

DJNZ R0,LOOP2

AJMP LOP

TAB:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H

DELL:MOV R7,#250;yanshi,SHIZHONG:1WEIMIAO,YUEWEI1s

DEL1:MOV R6,#200

DEL2:MOV R5,#10

DEL3:DJNZ R5,DEL3

DJNZ R6,DEL2

DJNZ R7,DEL1

END