main.s

学习AVR单片机的基础实验程序 适合初学者学习提高

	.module main.c
	.area text(rom, con, rel)
	.dbfile D:\AVR\我的程序\PWM0/cfg.h
	.dbfunc e delay_ms _delay_ms fV
;              i -> R20,R21
;           time -> R16,R17
	.even
_delay_ms::
	xcall push_gset1
	.dbline -1
	.dbline 10
; /****************************************
; *实验目的：熟悉定时器PWM模式控制LED
; *作者：萧联珠
; *日期：2007-11-22
; ****************************************/
; #include "iom16v.h"
; #include "cfg.h"
; 
; void main(void) 
; {
	.dbline 12
; 
; 	unsigned char i;
	xjmp L5
L2:
	.dbline 13
	clr R20
	clr R21
L6:
	.dbline 13
L7:
	.dbline 13
	subi R20,255  ; offset = 1
	sbci R21,255
	.dbline 13
	cpi R20,200
	ldi R30,0
	cpc R21,R30
	brlt L6
L3:
	.dbline 12
	subi R16,1
	sbci R17,0
L5:
	.dbline 12
	clr R2
	clr R3
	cp R2,R16
	cpc R3,R17
	brlt L2
	.dbline -2
L1:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r i 20 I
	.dbsym r time 16 I
	.dbend
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 17
; 	port_init();
; 	pwm_init();
; 	
; 	while (1) 
; 	{
	.dbline 18
; 	   for(i=250;i>1;i--)
	ldi R24,255
	out 0x18,R24
	.dbline 19
; 	   {
	out 0x17,R24
	.dbline -2
L10:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e pwm_init _pwm_init fV
	.even
_pwm_init::
	.dbline -1
	.dbline 23
; 	     OCR0=i;
; 		 delay_ms(8);
; 		}
; 		for(i=1;i<250;i++)
	.dbline 24
; 		{
	ldi R24,97
	out 0x33,R24
	.dbline -2
L11:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfile D:\AVR\我的程序\PWM0\main.c
	.dbfunc e main _main fV
;              i -> R20
	.even
_main::
	.dbline -1
	.dbline 10
	.dbline 13
	xcall _port_init
	.dbline 14
	xcall _pwm_init
	xjmp L14
L13:
	.dbline 17
	.dbline 18
	ldi R20,250
	xjmp L19
L16:
	.dbline 19
	.dbline 20
	out 0x3c,R20
	.dbline 21
	ldi R16,8
	ldi R17,0
	xcall _delay_ms
	.dbline 22
L17:
	.dbline 18
	dec R20
L19:
	.dbline 18
	ldi R24,1
	cp R24,R20
	brlo L16
	.dbline 23
	ldi R20,1
	xjmp L23
L20:
	.dbline 24
	.dbline 25
	out 0x3c,R20
	.dbline 26
	ldi R16,8
	ldi R17,0
	xcall _delay_ms
	.dbline 27
L21:
	.dbline 23
	inc R20
L23:
	.dbline 23
	cpi R20,250
	brlo L20
	.dbline 28
L14:
	.dbline 16
	xjmp L13
X0:
	.dbline -2
L12:
	.dbline 0 ; func end
	ret
	.dbsym r i 20 c
	.dbend