d1 db 9 db ? db 8 dup(?) 什么意思
1个回答
ORG 0000H
LJMP MAIN
ORG 0100H
MAIN:
MOV R0,#0FEH
MOV R1,#4
loop1:
MOV A,R0
MOV P1,A
LCALL delay
MOV A,R0
RL A
RL A
MOV R0,A
DJNZ R1,loop1
MOV R0,#07FH
MOV R1,#4
LOOP2:
MOV A,R0
MOV P1,A
Lcall Delay
MOV A,R0
RR A
RR A
MOV R0,A
DJNZ R1,LOOP2
MOV R0,#0EFH
MOV R2,#0F7H
MOV R1,#10
MOV A,R0
ANL A,R2
loop3:
MOV P1,A
ACALL DELAY
MOV A,R0
RR A
MOV R0,A
MOV A,R2
RL A
MOV R2,A
ANL A,R0
DJNZ R1,LOOP3
SJMP $
DJNZ R4,$
DJNZ R3,D2
DJNZ R2,D1
RET
DELAY:
MOV R5,#10
D2:
MOV R6,#200
D1:
MOV R7,#248
DJNZ R7,$
DJNZ R6,D1
DJNZ R5,D2
RET
END
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