delay.s

AVR单片机的T_TO_TWI通讯方式

	.module delay.c
	.area text(rom, con, rel)
	.dbfile F:\UART_TO_TWI\delay.c
	.dbfunc e delay _delay fV
;              d -> R16,R17
	.even
_delay::
	.dbline -1
	.dbline 5
; #include <iom8v.h>
; #include <macros.h>
; 
; void delay(unsigned int d)			              	//延时
; {
	rjmp L3
L2:
	.dbline 7
	wdr
L3:
	.dbline 6
; 	while (d--)
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L2
	tst R3
	brne L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r d 16 i
	.dbend
	.dbfunc e delay_us _delay_us fV
;           time -> R16,R17
	.even
_delay_us::
	.dbline -1
	.dbline 11
; 		WDR();																			//喂狗
; }
; /*				微秒级延时程序	  		*/
; void delay_us(int time)
; 	 {     
L6:
	.dbline 13
;   	  do
; 	  	{
	.dbline 14
; 		 time--;
	subi R16,1
	sbci R17,0
	.dbline 15
; 		}	
L7:
	.dbline 16
;   	  while (time>1)WDR();
	ldi R24,1
	ldi R25,0
	cp R24,R16
	cpc R25,R17
	brlt L6
	wdr
	.dbline -2
L5:
	.dbline 0 ; func end
	ret
	.dbsym r time 16 I
	.dbend
	.dbfunc e delay_ms _delay_ms fV
;           time -> R20,R21
	.even
_delay_ms::
	rcall push_gset1
	movw R20,R16
	.dbline -1
	.dbline 20
; 	 }	  
; /*	  		    毫秒级延时程序			*/	 
; void delay_ms(unsigned int time)
; 	 {
	rjmp L11
L10:
	.dbline 22
	.dbline 23
	ldi R16,1000
	ldi R17,3
	rcall _delay_us
	.dbline 24
	subi R20,1
	sbci R21,0
	.dbline 25
L11:
	.dbline 21
; 	  while(time!=0)
	cpi R20,0
	cpc R20,R21
	brne L10
X1:
	.dbline -2
L9:
	rcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r time 20 i
	.dbend