zh7.asm

基于PROTERUS仿真的AVR例子

.device AT90S8535
.equ    sph     =$3E
.equ    spl     =$3D
.equ	PORTA	=$1B
.equ	DDRA	=$1A
.equ    PINA    =$19
.equ	PORTC	=$15
.equ	DDRC	=$14
.equ    PINC    =$13
.def 	XL     	=r26
.def 	XH     	=r27
.def 	ZL     	=r30
.def 	ZH     	=r31

	.org	$0000
	rjmp	main

tab:	.db	$00,$01,$02,$03,$04,$05,$06,$07,$08,$09,$0a

main:	ldi	r16,$02			;栈指针置初值
	out	sph,r16
	ldi	r16,$5f
	out	spl,r16
	ldi	XL,$60
	ldi	XH,$00
	ldi	r16,$df
	out	DDRA,r16
	ldi	r16,$20
	out	PORTA,r16
	ldi	r16,$08			;密码个数8个
	mov	r4,r16
	ldi	r16,$00			;初始密码0，1，2，3，4，5，6，7
pnext:	st	X+,r16
	inc	r16
	dec	r4
	brne	pnext	
mloop:	cbi	PORTA,0			;锁合
	sbi	PORTA,1			;锁开
	sbi	PORTA,2			;键有效
	sbi	PORTA,3			;错误
	sbi	PORTA,4			;报警
	ldi	r16,$03			;错误次数3次
	mov	r3,r16
;**********************************************************
					;输入密码
getpw:	ldi	r16,$08			;密码个数
	mov	r4,r16
	ldi	XL,$70			;输入密码暂存区
	ldi	XH,$00	
again:	rcall	key
	cpi	r16,$0a
	brne	con			;按确认键无效
	rjmp	again
con:	st	X+,r16
	rcall	disp			;按键有效显示
	dec	r4
	brne	again
again1:	rcall	key			;按确认键
	cpi	r16,$0a
	brne	again1
	rcall	disp			;按确认键有效显示
	rcall	com			;比较密码
	sbi	PORTA,0			;熄锁合指示灯
	cbi	PORTA,1			;开锁
wait:	in	r16,PINA		;是否重新上锁
	sbrs	r16,5
	rjmp	mloop			;主循环
	rcall	testk			;是否有键按下，是否修改密码
	cpi	r16,$f0
	breq	wait
	rcall	chpsw			;修改密码子程序
	rjmp	wait
;**********************************************************
com:	ldi	r16,$08
	mov	r4,r16
	ldi	XL,$70			;输入密码暂存区
	ldi	XH,$00
agai:	ld	r16,X
	mov	r19,r16
	ldi	r16,$10
	sub	XL,r16
	ld	r16,X+
	cpse	r16,r19			;比较
	rjmp	oncem
	ldi	r16,$10
	add	XL,r16
	dec	r4
	brne	agai
	ret				;正确返回
;**********************************************************
oncem:	cbi	PORTA,3
	rcall	delay
	sbi	PORTA,3
	dec	r3			;3次错误输入
	brne	getpw
	cbi	PORTA,4			;声报警
	cbi	PORTA,3			;光报警
w:	rjmp	w
;**********************************************************
chpsw:	ldi	r16,$07			;修改密码子程序
	mov	r4,r16
	ldi	XL,$68			;输入密码暂存区
	ldi	XH,$00
	rcall	key
	cpi	r16,$0a
	brne	con2			;按确认键无效
	rjmp	again
;**********************************************************
con2:	st	X+,r16
	rcall	disp			;按键有效显示
ano:	rcall	key
	cpi	r16,$0a
	brne	con3			;按确认键无效
	rjmp	ano
con3:	st	X+,r16
	rcall	disp			;按键有效显示
	dec	r4
	brne	ano
again2:	rcall	key			;按确认键
	cpi	r16,$0a
	brne	con2
	rcall	disp			;按键有效显示
	ldi	r16,$08
	mov	r4,r16
	ldi	XL,$68
	ldi	XH,$00
change:	ld	r16,X			;确认后修改密码
	mov	r19,r16
	ldi	r16,$08
	sub	XL,r16
	st	X+,r19
	add	XL,r16
	dec	r4
	brne	change
	ret
;**********************************************************
disp:	cbi	PORTA,2			;按键有效显示
	rcall	delay
	sbi	PORTA,2
	ret
;**********************************************************
testk:	ldi	r16,$f0			;判断是否有键按下
	out	DDRC,r16
	out	PORTC,r16
	in	r16,PINC
	andi	r16,$ff
	ret	
;**********************************************************
key:	ldi	r16,$f0			;取键值子程序，阵列式键盘
	out	DDRC,r16
	out	PORTC,r16
l1:	in	r16,PINC
	cpi	r16,$f1
	brne	l2
	rcall	t1ms
	in	r16,PINC
	cpi	r16,$f1
	brne	l2
	ldi	r17,$00
	rjmp	rscan
l2:	cpi	r16,$f2
	brne	l3
	rcall	t1ms
	cpi	r16,$f2
	brne	l3
	ldi	r17,$01
	rjmp	rscan
l3:	cpi	r16,$f4
	brne	key
	rcall	t1ms
	cpi	r16,$f4
	brne	key
	ldi	r17,$02
rscan:	ldi	r16,$0f
	out	DDRC,r16
	out	PORTC,r16
c1:	in	r16,PINC
	cpi	r16,$e0
	brne	c2
	ldi	r18,$00
	rjmp	calcu
c2:	cpi	r16,$d0
	brne	c3
	ldi	r18,$01
	rjmp	calcu
c3:	cpi	r16,$b0
	brne	c4
	ldi	r18,$02
	rjmp	calcu
c4:	cpi	r16,$70
	brne	key
	ldi	r18,$03
;**********************************************************
calcu:	cpi	r17,$00			;计算键号
	brne	calcu1
	ldi	r17,$00
	rjmp	cb
calcu1:	cpi	r17,$01
	brne	calcu2
	ldi	r17,$04
	rjmp	cb
calcu2:	cpi	r17,$02
	brne	calcu3
	ldi	r17,$08
	rjmp	cb
calcu3:	ldi	r17,$0C
cb:	add	r17,r18
	rcall	cqb
	rcall	w0
	ret
;**********************************************************
cqb:	ldi	ZH,high(tab*2)		;7段码的首址给Z
	ldi	ZL,low(tab*2)
	add	ZL,r17			;首地址+偏移量
	lpm				;查表送B口输出
	mov	r16,r0
	ret
;**********************************************************
					;等待按键抬起
w0:	ldi	r20,$f0
	out	PORTC,r20
w1:	in	r20,PINC
	andi	r20,$ff
	cpi	r20,$f0
	brne	w2
	ret
w2:	rjmp	w0
;**********************************************************
t1ms:	ldi	r24,6			;延时子程序
	push	r24
del2:	push	r24
del3:	dec	r24
	brne	del3
	pop	r24
	dec	r24
	brne	del2
	pop	r24
	ret
;**********************************************************
					;延时500ms
delay:	ldi	r16,197
        push	r16			;进栈需2t
de0:	push	r16			;进栈需2t
de1:	push	r16			;进栈需2t
de2:	dec	r16			;-1需1t
	brne	de2			;不为0转，为0顺序执行，需1t/2t
	pop	r16			;出栈需2t
	dec	r16			;-1需1t
	brne	de1			;不为0转，为0顺序执行，需1t/2t
	pop	r16			;出栈需2t
	dec	r16			;-1需1t
	brne	de0			;不为0转，为0顺序执行，需1t/2t
	pop	r16			;出栈需2t
	ret				;子程序返回需4t