调光.asm

来自「DIMMER.rar包括电路图和源程序。用51单片机实现」· 汇编 代码 · 共 118 行

	PARAMETER	EQU	40H;延时参数存储器
	SHOW		EQU	41H;延时执行缓冲器
	ON_OFF		BIT	P1.0;开关键
	KEY_ADD		BIT	P1.1;调亮键
	KEY_SUBB	BIT	P1.2;调暗键
	LEAST		BIT	30H;最亮标志
	MOST		BIT	31H;最暗标志
	SIGN_ON_OFF	BIT	32H;开关开状态标志

	ORG	0
	JMP	MAIN
	
	ORG	03H
	SETB	P0.0
	SETB	TR0	
	RETI

	ORG	0BH
	JMP	INT_T0

	ORG	1BH
	JMP	INT_T1

MAIN:
	MOV	TMOD,#22H
	MOV	TH0,#125
	MOV	TL0,#125
	MOV	TH1,#228
	MOV	TL1,#228

	MOV	PARAMETER,#40
	MOV	SHOW,PARAMETER

	CLR	SIGN_ON_OFF
	SETB	EA
	SETB	IT0
	SETB	ET0
	SETB	ET1

START:
	MOV	C,SIGN_ON_OFF
	MOV	EX0,C
	JC	NOT_OFF
	SETB	P0.0
NOT_OFF:
	JB	ON_OFF,SETTING
	CALL	DELAY
	JB	ON_OFF,START
	CPL	SIGN_ON_OFF
	JNB	ON_OFF,$
RETURN:
	CALL	DELAY
	JMP	START

SETTING:
	JNB	SIGN_ON_OFF,START	
	JNB	KEY_ADD,BRIGHT
	JNB	KEY_SUBB,DARK
	JMP	START

BRIGHT:
	MOV	R0,#80
	CALL	LOOP1
	JB	KEY_ADD,START
	JB	LEAST,RETURN
	CLR	MOST
	DEC	PARAMETER
	MOV	A,PARAMETER
	CJNE	A,#4,CONTINUE_SUBB
	SETB	LEAST

CONTINUE_SUBB:
;	JNB	KEY_ADD,$
	JMP	RETURN

DARK:
	MOV	R0,#80
	CALL	LOOP1
	JB	KEY_SUBB,START
	JB	MOST,RETURN
	INC	PARAMETER
	CLR	LEAST
	MOV	A,PARAMETER
	CJNE	A,#95,CONTINUE_ADD
	SETB	MOST

CONTINUE_ADD:
;	JNB	KEY_ADD,$
	JMP	RETURN

DELAY:
	MOV	R0,#40
LOOP1:
	MOV	R1,#0
LOOP2:
	DJNZ	R1,LOOP2
	DJNZ	R0,LOOP1
	RET

INT_T0:
	CPL	P0.2
	DJNZ	SHOW,RET_INT
	CPL	P0.3
	MOV	SHOW,PARAMETER
	CLR	P0.0
	CLR	TR0
	SETB	TR1

RET_INT:
	RETI

INT_T1:
	SETB	P0.0
	CLR	TR1
	RETI
	
	END