這個利用基礎匯編語言編寫的一套交通燈模擬實驗。 希望幫助各位同學
電路原理圖如下：
ORG 0000H
AJMP MAIN
ORG 0030H
MAIN:MOV 40H,#6FH
MOV 41H,#7FH
MOV 42H,#07H
MOV 43H,#7DH
MOV 44H,#6DH
MOV 45H,#66H
MOV 46H,#4FH
MOV 47H,#5BH
MOV 48H,#06H
MOV 49H,#3FH
MOV P2,#21H
MOV R0,#40H
MOV 59H,#0AH
X0:MOV P0,@R0
INC R0
ACALL DELAY
DJNZ 59H,X0
MOV P2,#22H
MOV R0,#46H
MOV 61H,#4
X4:MOV P0,@R0
INC R0
LCALL DELAY
DJNZ 61H,X4
MOV R1,#40H
MOV 60H,#0AH
MOV P2,#0CH
X2:MOV P0,@R1
INC R1
ACALL DELAY
DJNZ 60H,X2
MOV P2,#14H
MOV R0,#46H
MOV 62H,#4
X5:MOV P0,@R0
INC R0
LCALL DELAY
DJNZ 62H,X5
AJMP MAIN
DELAY:MOV R5,#2
D1:MOV R6,#250
D2:MOV R7,#200
D3:NOP
NOP
DJNZ R7,D3
DJNZ R6,D2
DJNZ R5,D1
RET
END
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