138.asm

学林电子实验箱源码 完整板

    org 0000h
    ajmp    main
    org 0030h
 AA EQU P1.0
 BB EQU P1.1
 CC EQU P1.2
MAIN:
CLR CC
CLR BB
CLR AA
CALL DELAY

CLR CC
CLR BB
SETB AA
CALL DELAY

CLR CC
SETB BB
CLR AA
CALL DELAY

CLR CC
SETB BB
SETB AA
CALL DELAY

SETB CC
CLR BB
CLR AA
CALL DELAY

SETB CC
CLR BB
SETB AA
CALL DELAY
SETB CC
SETB BB
CLR AA
CALL DELAY
SETB CC
SETB BB
SETB AA
CALL DELAY


JMP MAIN


 DELAY:
MOV  R5,#255
D3:MOV R2,#255
D4: DJNZ R2,D4
DJNZ R5,D3
RET


END