delay.s

AVR ds18b20 源代码 对学习温度控制的人很有帮助

	.module delay.c
	.area text(rom, con, rel)
	.dbfile D:\开发板\source\ds18b20\delay.c
	.dbfunc e delay_us _delay_us fV
;              i -> R20,R21
;              n -> R16,R17
	.even
_delay_us::
	rcall push_gset1
	.dbline -1
	.dbline 3
;  
; void delay_us(unsigned int n)
; {
	.dbline 5
	movw R20,R16
	rjmp L5
L2:
	.dbline 5
L3:
	.dbline 5
	subi R20,1
	sbci R21,0
L5:
	.dbline 5
;   unsigned int i;
;   for(i=n;i>0;i--);
	cpi R20,0
	cpc R20,R21
	brne L2
X0:
	.dbline -2
L1:
	rcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 16 i
	.dbend
	.dbfunc e delay_1ms _delay_1ms fV
;              i -> R16,R17
	.even
_delay_1ms::
	.dbline -1
	.dbline 9
;   }
;   
; void delay_1ms(void)
; { unsigned int i;
	.dbline 10
;  for(i=1;i<(unsigned int)(1144-2);i++)
	ldi R16,1
	ldi R17,0
	rjmp L10
L7:
	.dbline 11
L8:
	.dbline 10
	subi R16,255  ; offset = 1
	sbci R17,255
L10:
	.dbline 10
	cpi R16,118
	ldi R30,4
	cpc R17,R30
	brlo L7
	.dbline -2
L6:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 i
	.dbend
	.dbfunc e delay_ms _delay_ms fV
;              i -> R20,R21
;              n -> R22,R23
	.even
_delay_ms::
	rcall push_gset2
	movw R22,R16
	.dbline -1
	.dbline 14
;     ;
; }
; void delay_ms(unsigned int n)
; {
	.dbline 15
;  unsigned int i=0;
	clr R20
	clr R21
	rjmp L13
L12:
	.dbline 17
	.dbline 17
	rcall _delay_1ms
	.dbline 18
	subi R20,255  ; offset = 1
	sbci R21,255
	.dbline 19
L13:
	.dbline 16
;    while(i<n)
	cp R20,R22
	cpc R21,R23
	brlo L12
	.dbline -2
L11:
	rcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 22 i
	.dbend