Question

汇编语言单片机流水灯

流水灯，用汇编语言，逐位求反法实现8灯依次亮，再8灯一起亮2次，延时0.5s。 特别是逐位求反法，怎么写啊~~~~

Answer 1

ORG 0000H
LJMP MAIN
ORG 0030H
MAIN:
MOV P1,#0FFH
CPL P1.0
LCALL DELAY
CPL P1.1
LCALL DELAY
CPL P1.2
LCALL DELAY
CPL P1.3
LCALL DELAY
CPL P1.4
LCALL DELAY
CPL P1.5
LCALL DELAY
CPL P1.6
LCALL DELAY
CPL P1.7
MOV R6,#2
LOOP:
MOV R7,#10
MOV P1,#00H
DLY:
LCALL DELAY
DJNZ R7,DLY
MOV P1,#0FFH
MOV R7,#10
DLY1:
LCALL DELAY
DJNZ R7,DLY1
DJNZ R6,LOOP
LJMP MAIN
END