Code led sao băng Asembly đơn giản, thích hợp viết code led quảng cáo thêm hiệu ứng viền sao băng.
$mod51
ORG 0H
;------------------------------------------------------
MAIN:
CALL SAOBANG
;------------------------------------------------------
LJMP MAIN
;------------------------------------------------------
;******************************************************
SAOBANG:
;******************************************************
MOV R1,#200
LED00:
MOV P0,#00011111B
MOV R7,#8
MOV A,R7
LCALL DELAY
CLR P0.0
MOV R7,#16
MOV A,R7
LCALL DELAY
CLR P0.1
MOV R7,#32
MOV A,R7
LCALL DELAY
CLR P0.2
MOV R7,#64
MOV A,R7
LCALL DELAY
CLR P0.3
MOV R7,#128
MOV A,R7
LCALL DELAY
CLR P0.4
DJNZ R1,LED00
;---------------------------------------------------------------
MOV R1,#200
LED01:
MOV P0,#00011111B
MOV R7,#8
MOV A,R7
LCALL DELAY
CLR P0.1
MOV R7,#16
MOV A,R7
LCALL DELAY
CLR P0.2
MOV R7,#32
MOV A,R7
LCALL DELAY
CLR P0.3
MOV R7,#64
MOV A,R7
LCALL DELAY
CLR P0.4
MOV R7,#128
MOV A,R7
LCALL DELAY
CLR P0.0
DJNZ R1,LED01
;---------------------------------------------------------------
MOV R1,#200
LED02:
MOV P0,#00011111B
MOV R7,#8
MOV A,R7
LCALL DELAY
CLR P0.2
MOV R7,#16
MOV A,R7
LCALL DELAY
CLR P0.3
MOV R7,#32
MOV A,R7
LCALL DELAY
CLR P0.4
MOV R7,#64
MOV A,R7
LCALL DELAY
CLR P0.0
MOV R7,#128
MOV A,R7
LCALL DELAY
CLR P0.1
DJNZ R1,LED02
;---------------------------------------------------------------
MOV R1,#200
LED03:
MOV P0,#00011111B
MOV R7,#8
MOV A,R7
LCALL DELAY
CLR P0.3
MOV R7,#16
MOV A,R7
LCALL DELAY
CLR P0.4
MOV R7,#32
MOV A,R7
LCALL DELAY
CLR P0.0
MOV R7,#64
MOV A,R7
LCALL DELAY
CLR P0.1
MOV R7,#128
MOV A,R7
LCALL DELAY
CLR P0.2
DJNZ R1,LED03
;---------------------------------------------------------------
MOV R1,#200
LED04:
MOV P0,#00011111B
MOV R7,#8
MOV A,R7
LCALL DELAY
CLR P0.4
MOV R7,#16
MOV A,R7
LCALL DELAY
CLR P0.0
MOV R7,#32
MOV A,R7
LCALL DELAY
CLR P0.1
MOV R7,#64
MOV A,R7
LCALL DELAY
CLR P0.2
MOV R7,#128
MOV A,R7
LCALL DELAY
CLR P0.3
DJNZ R1,LED04
RET
;---------------------------------------------------
DELAY:
DJNZ ACC,$
RET
END
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