zh33.asm

基于PROTERUS仿真的AVR例子

.device AT90S8535
.equ    SREG	=$3F
.equ    sph    	=$3E
.equ    spl    	=$3D
.equ    TIMSK   =$39
.equ	TIFR	=$38
.equ    OCR1AH  =$2B
.equ    OCR1AL  =$2A
.equ    TCCR1B  =$2E
.equ    TCNT1H	=$2D
.equ    TCNT1L	=$2C
.equ	PORTA	=$1B
.equ	DDRA	=$1A
.equ    PINA    =$19
.equ	PORTB	=$18
.equ	DDRB	=$17
.equ    PINB    =$16
.equ	PORTC	=$15
.equ	DDRC	=$14 		
.equ    PINC    =$13
.equ	PORTD	=$12
.equ	DDRD	=$11
.equ    PIND    =$10
.def 	ZH     	=r31
.def 	ZL     	=r30

	.org	$0000
	rjmp	main

main:	ldi	r16,$02			;栈指针置初值
	out	sph,r16
	ldi	r16,$5f
	out	spl,r16
	ldi	r28,$00			;定义标志
	ldi	r16,$ff			;定义PA、PB、PD为输出口
	out	DDRA,r16
	out	PORTA,r16
	out	DDRB,r16
	out	DDRD,r16
	out	TIMSK,r16
	clr	r16			;置TCNT1初值为0
	out	TCNT1L,r16
	out	TCNT1H,r16
	ldi	r16,$0c			;OCRLA置$0c35，即1s中断1次
	out	OCR1AH,r16
	ldi	r16,$35
	out	OCR1AL,r16
	ldi	r16,$0c			;T/C1对主频256分频定时
	out	TCCR1B,r16
		
here:	ldi	r16,10			;置1s计数初值,100ms*10=1s
	mov	r2,r16
	ldi	r16,20			;红灯亮20s
	mov	r3,r16
	ldi	r26,25			;东西路口计时显示初值25s
	ldi	r27,25			;南北路口计时显示初值25s
	rcall	state1

wait1:	rcall	play
	in	r16,TIFR
	sbrs	r16,4			;查询100ms到否
	rjmp	wait1
	ldi	r16,$10
	out	TIFR,r16
	dec	r2
	brne	wait1			;判断1s到否？未到继续状态1
	ldi	r16,10			;置100ms计数初值
	mov	r2,r16
	dec	r26			;东西路口显示时间减1s
	dec	r27			;南北路口显示时间减1s
	rcall	play
	dec	r3
	brne	wait1			;状态1维持20s
;**********************************************************
	ldi	r16,5			;置100ms计数初值5*2=10
	mov	r2,r16
	ldi	r16,3			;绿灯闪3s
	mov	r3,r16
	ldi	r16,2			;闪烁间隔200ms
	mov	r4,r16
	ldi	r26,5
	ldi	r27,5
	
wait2:	rcall	play
	in	r16,TIFR
	sbrs	r16,4			;查询100ms到否
	rjmp	wait2
	ldi	r16,$10
	out	TIFR,r16
	dec	r4			;判断200ms到否？未到继续状态2
	brne	wait2
	cpi	r28,$00			;东西绿灯闪
	brne	cl
	sbi	PORTA,1
	com	r28
	rjmp	dd
cl:	cbi	PORTA,1
	com	r28
dd:	ldi	r16,4			;判断200ms到否？未到继续状态2
	mov	r4,r16
	dec	r2
	brne	wait2
	ldi	r16,5			;置50ms计数初值
	mov	r2,r16
	dec	r26			;东西路口显示时间减1s
	dec	r27			;南北路口显示时间减1s
	rcall	play
	dec	r3
	brne	wait2
;**********************************************************	
	ldi	r16,10			;置100ms计数初值
	mov	r2,r16
	ldi	r16,2			;黄灯亮2s
	mov	r3,r16
	ldi	r26,2			;东西路口计时显示初值2s
	ldi	r27,2			;南北路口计时显示初值2s
	
wait3:	rcall	play
	rcall	state3			;调用状态3
	in	r16,TIFR
	sbrs	r16,4			;查询100ms到否
	rjmp	wait3
	ldi	r16,$10
	out	TIFR,r16
	dec	r2
	brne	wait3			;判断1s到否？未到继续状态3
	ldi	r16,10			;置100ms计数初值
	mov	r2,r16
	dec	r26			;东西路口显示时间减1s
	dec	r27			;南北路口显示时间减1s
	rcall	play
	dec	r3
	brne	wait3
;**********************************************************
	ldi	r16,10			;置1s计数初值,100ms*10=1s
	mov	r2,r16
	ldi	r16,20			;红灯亮20s
	mov	r3,r16
	ldi	r26,25			;东西路口计时显示初值25s
	ldi	r27,25			;南北路口计时显示初值25s
	
wait4:	rcall	play
	rcall	state4			;调用状态4
	in	r16,TIFR
	sbrs	r16,4			;查询100ms到否
	rjmp	wait4
	ldi	r16,$10
	out	TIFR,r16
	dec	r2
	brne	wait4			;判断1s到否？未到继续状态4
	ldi	r16,10
	mov	r2,r16
	dec	r26
	dec	r27
	rcall	play
	dec	r3
	brne	wait4
;**********************************************************
	ldi	r16,5			;置100ms计数初值5*2=10
	mov	r2,r16
	ldi	r16,3			;绿灯闪3s
	mov	r3,r16
	ldi	r16,2			;闪烁间隔200ms
	mov	r4,r16
	ldi	r26,5
	ldi	r27,5
	
wait5:	rcall	play
	in	r16,TIFR
	sbrs	r16,4			;查询100ms到否
	rjmp	wait5
	ldi	r16,$10
	out	TIFR,r16
	dec	r4			;判断200ms到否？未到继续状态2
	brne	wait5
	cpi	r28,$ff			;南北绿灯闪
	brne	cll
	sbi	PORTA,4
	com	r28
	rjmp	ddd
cll:	cbi	PORTA,4
	com	r28
ddd:	ldi	r16,4			;判断200ms到否？未到继续状态2
	mov	r4,r16
	dec	r2
	brne	wait5
	ldi	r16,5			;置50ms计数初值
	mov	r2,r16
	dec	r26			;东西路口显示时间减1s
	dec	r27			;南北路口显示时间减1s
	rcall	play
	dec	r3
	brne	wait5
;**********************************************************
	ldi	r16,10			;置100ms计数初值
	mov	r2,r16
	ldi	r16,2			;黄灯亮2s
	mov	r3,r16
	ldi	r26,2			;东西路口计时显示初值2s
	ldi	r27,2			;南北路口计时显示初值2s
	
wait6:	rcall	play
	rcall	state6			;调用状态3
	in	r16,TIFR
	sbrs	r16,4			;查询100ms到否
	rjmp	wait6
	ldi	r16,$10
	out	TIFR,r16
	dec	r2
	brne	wait6			;判断1s到否？未到继续状态3
	ldi	r16,10			;置100ms计数初值
	mov	r2,r16
	dec	r26			;东西路口显示时间减1s
	dec	r27			;南北路口显示时间减1s
	rcall	play
	dec	r3
	brne	wait6
	rjmp	here			;大循环
;**********************************************************
state1:	ldi	r16,$35			;东西路口绿灯亮，南北路口红灯亮
	out	PORTA,r16
	ret
;**********************************************************
state3:	ldi	r16,$33			;东西路口黄灯亮，南北路口红灯亮
	out	PORTA,r16
	ret
;**********************************************************
state4:	ldi	r16,$2e			;东西路口红灯亮，南北路口绿灯亮
	out	PORTA,r16
	ret
;**********************************************************
state6:	ldi	r16,$1e			;东西路口红灯亮，南北路口黄灯亮
	out	PORTA,r16
	ret
;**********************************************************

play:	mov	r16,r26			;东西寄存器中数二转十，送r19、r18
	rcall	b8td
	mov	r19,r17
	mov	r18,r16
	mov	r16,r27			;南北寄存器中数二转十，送r21、r20
	rcall	b8td
	mov	r21,r17
	mov	r20,r16
	rcall	smiao
	ret

b8td:	clr	r17			;将r16中的二进制数转换为十进制数，十位、个位分别送r17、r16
b8td1:	subi	r16,10
	brcs	b8td2
	inc	r17
	rjmp	b8td1
b8td2:	subi	r16,(-10)
	ret
	
smiao:	ldi	r16,$fe			;送东西个位位线
	out	PORTD,r16
	mov	r23,r18			;将东西个位的BCD码送r23
	rcall	cqb			;查7段码，送B口输出
	rcall	t1ms			;延时1ms
	ldi	r16,$fd			;送东西十位位线
	out	PORTD,r16
	mov	r23,r19			;将东西十位的BCD码送r23
	rcall	cqb			;查7段码，送B口输出
	rcall	t1ms			;延时1ms
	ldi	r16,$fb			;送南北个位位线
	out	PORTD,r16
	mov	r23,r20			;将南北个位的BCD码送r23
	rcall	cqb			;查7段码，送B口输出
	rcall	t1ms			;延时1ms
	ldi	r16,$f7			;送南北十位位线
	out	PORTD,r16
	mov	r23,r21			;将南北十位的BCD码送r23
	rcall	cqb			;查7段码，送B口输出
	rcall	t1ms			;延时1ms
	ret
	
cqb:	ldi	ZH,high(tab*2)		;7段码的首址给Z
	ldi	ZL,low(tab*2)
	add	ZL,r23			;首地址+偏移量
	lpm				;查表送B口输出
	out	PORTB,r0
	ret
	
t1ms:	ldi	r24,101			;延时1ms子程序
	push	r24
del2:	push	r24
del3:	dec	r24
	brne	del3
	pop	r24
	dec	r24
	brne	del2
	pop	r24
	ret

tab:	.db	$3f,$06,$5b,$4f,$66,$6d,$7d,$07,$7f,$6f