led1.asm

基于51单片机的流水灯、跑马灯等实验

       ORG 0000H
       LJMP MAIN
       ORG 0100H
MAIN:  MOV SP,#60H
       MOV P1,#0FFH
       MOV DPTR,#LED_TABLE
LIGHT: MOV R7,#42
LOOP:  MOV A,#42
       CLR C
       SUBB A,R7
       MOVC A,@A+DPTR
       MOV P1,A
       LCALL DELAY
       DJNZ R7,LOOP
       SJMP LIGHT
DELAY: MOV R1,#10H
DELAY0: MOV R6,#7FH
DELAY1: MOV R5,#7FH
       DJNZ R5,$
       DJNZ R6,DELAY1
       DJNZ R1,DELAY0
       RET
LED_TABLE:
DB 0FFH
DB 0FEH，0FDH，0FBH，0F7H，0EFH，0DFH，0BFH，07FH
DB 0FEH,0FCH,0F8H,0F0H,0F8H,0FCH,0FEH,000H
DB 080H，0C0H，0E0H，0F0H，0F8H，0FCH，0FEH，0FFH
DB 07EH,0BDH,0DBH,0E7H,0E7H,0DBH,0BDH,07EH
DB 07EH,03CH,018H,000H,000H,018H,03CH,07EH
DB 000H
END