lesson3.s

基于AVR的数码管显示程序。是学习单片机入门级程序。 本程序出自高手之手

	.module lesson3.c
	.area text(rom, con, rel)
	.dbfile I:\AVR视频教程\视频教程\lesson3\lesson3\lesson3.c
	.dbfunc e main _main fV
;              i -> R16,R17
	.even
_main::
	.dbline -1
	.dbline 4
; #include<iom16v.h>
; #include <macros.h>
; void main()
; {
	.dbline 6
;    unsigned int i;
;    DDRA|=BIT(PA2);
	sbi 0x1a,2
	.dbline 7
;    PORTA|=BIT(PA2);
	sbi 0x1b,2
	.dbline 9
;    
;    DDRB=0XFF;
	ldi R24,255
	out 0x17,R24
	xjmp L3
L2:
	.dbline 11
;    while(1)
;    {
	.dbline 12
;    PORTB=0XFE;//11111110
	ldi R24,254
	out 0x18,R24
	.dbline 13
;    i=50000;
	ldi R16,50000
	ldi R17,195
L5:
	.dbline 14
L6:
	.dbline 14
;    while(i--);  
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L5
	tst R3
	brne L5
X0:
	.dbline 15
;       i=50000;
	ldi R16,50000
	ldi R17,195
L8:
	.dbline 16
L9:
	.dbline 16
;    while(i--); 
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L8
	tst R3
	brne L8
X1:
	.dbline 20
;  //  DDRA|=BIT(PA2);
;  //  PORTA&=~BIT(PA2);
;    
;    PORTB=0XFF;
	ldi R24,255
	out 0x18,R24
	.dbline 21
;       i=50000;
	ldi R16,50000
	ldi R17,195
L11:
	.dbline 22
L12:
	.dbline 22
;    while(i--);   
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L11
	tst R3
	brne L11
X2:
	.dbline 23
;    i=50000;
	ldi R16,50000
	ldi R17,195
L14:
	.dbline 24
L15:
	.dbline 24
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L14
	tst R3
	brne L14
X3:
	.dbline 25
L3:
	.dbline 10
	xjmp L2
X4:
	.dbline -2
	.dbline 26
;    while(i--);
;    }
; }
L1:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 i
	.dbend