交通灯.asm

是我在电子竞赛期间写的一些单片机汇编程序

	ORG 0000H
	AJMP MAIN
	ORG 000BH
	AJMP PIPO
	ORG 0100H 
MAIN:
	MOV SP,#30H
	MOV 40H,#00H			
	MOV 41H,#25H
	MOV TMOD,#01H
	MOV TH0,#0DCH
	MOV TL0,#00H									
	SETB EA
	SETB ET0
	SETB TR0
	MOV 42H,#00H
	MOV R6,#00H
	MOV 44H,#00H
CYCLE:
	LCALL DISP
	LJMP CYCLE
PIPO: INC R6
	CJNE R6,#32H,NEXT
	MOV R6,#00H
	INC 44H
NEXT:	PUSH PSW
	PUSH ACC
	MOV TH0,#0DCH
	MOV TL0,#00H
	INC 40H      
	MOV A,40H
	CJNE A,#64H,RET0
	MOV 40H,#00H
	MOV A,41H
	DEC A
KK:	CJNE A,#1FH,KK0
	SUBB A,#06H
	AJMP KK1
KK0:	CJNE A,#0FH,KK1
	SUBB A,#06H
KK1:	MOV 41H,A
KK2:	CJNE A,#0FFH,RET0
	MOV R7,42H
AA0:	CJNE R7,#00H,AA1
	MOV 41H,#05H
	INC 42H
AA1:	CJNE R7,#01H,AA2
	MOV 41H,#15H
	INC 42H
AA2:	CJNE R7,#02H,AA3
	MOV 41H,#05H
	INC 42H
AA3: 
	CJNE R7,#03H,RET0
	MOV 41H,#25H	
	MOV 42H,#00H
RET0: POP ACC
	POP PSW
	RETI
DISP:	
	MOV A,41H
	ANL A,#0FH
	ACALL TABLE
	MOV P2,A
	CLR P0.6
	ACALL DELAY
	SETB P0.6
	MOV A,41H
	SWAP A
	ANL A,#0FH
	ACALL TABLE
	MOV P2,A
	CLR P0.5
	ACALL DELAY
	SETB P0.5
BB0:	
	MOV R7,42H
    	CJNE R7,#01H,BB1
	MOV A,44H
	JB ACC.0, BULIAO1	
	SETB P0.7
	MOV P2,#0FFH
	CLR P2.4
	CLR P2.0
	CLR P0.7 
	CPL P1.0
	ACALL DELAY
	SETB P0.7
BULIAO1:
BB1:	
	MOV R7,42H
	CJNE R7,#02H,BB2
	SETB P0.7
	MOV P2,#0FFH
	CLR P2.2
	CLR P2.3
	CLR P0.7 
	ACALL DELAY
	SETB P0.7
BB2:	MOV R7,42H
	CJNE R7,#03H,BB3
	MOV A,44H
	JB ACC.0, BULIAO	
	SETB P0.7
	MOV P2,#0FFH
	CPL P1.0
	CLR P2.1
	CLR P2.3
	CLR P0.7 
	ACALL DELAY
	SETB P0.7
BULIAO:
BB3:	
	MOV R7,42H
	CJNE R7,#00H,OUT1
	SETB P0.7
	MOV P2,#0FFH
	CLR P2.5
	CLR P2.0
	CLR P0.7 
	ACALL DELAY
	SETB P0.7
OUT1:
	RET
TABLE:
	INC A
	MOVC A,@A+PC
	RET     
DB 0C0H,0F9H,0A4H,0B0H,099H,092H,082H,0F8H,080H,090H	
DELAY: PUSH PSW	
	 MOV	R3,#10H
DELAY0:MOV	R4,#50H
DELAY1:DJNZ	R4,DELAY1
	 DJNZ	R3,DELAY0
	 POP PSW 
RET
END