led_run.s

AVR ATmega8515上试过的。跑马灯程序C写的

	.module LED_run.c
	.area text(rom, con, rel)
	.dbfile E:\系列开发板\51单片机开发板系列\51+AVR配套光盘资料\AVR例程\跑马灯\LED_run.c
	.dbfunc e delay _delay fV
;              n -> R16,R17
	.even
_delay::
	.dbline -1
	.dbline 6
; #include <iom8515v.h>
; 
; 
; 
; void delay(unsigned int n)
; {
	rjmp L3
L2:
	.dbline 7
	subi R16,1
	sbci R17,0
L3:
	.dbline 7
;  while(n) n--;
	cpi R16,0
	cpc R16,R17
	brne L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r n 16 i
	.dbend
	.dbfunc e main _main fV
;              i -> R20,R21
	.even
_main::
	.dbline -1
	.dbline 13
; }
; 
; 
; 
; void main()
; {
	.dbline 15
;  unsigned int i;
;  DDRB = 0xFF;
	ldi R24,255
	out 0x17,R24
	.dbline 16
;  PORTB = 0xFF;
	out 0x18,R24
	rjmp L7
L6:
	.dbline 19
;  
;  while(1)
;   {
	.dbline 20
;    for(i=0x01; i<=0x80; i<<=1)
	ldi R20,1
	ldi R21,0
	rjmp L12
L9:
	.dbline 21
	.dbline 22
	movw R24,R20
	com R24
	com R25
	andi R25,0
	out 0x18,R24
	.dbline 23
	ldi R16,65000
	ldi R17,253
	rcall _delay
	.dbline 24
L10:
	.dbline 20
	lsl R20
	rol R21
L12:
	.dbline 20
	ldi R24,128
	ldi R25,0
	cp R24,R20
	cpc R25,R21
	brsh L9
	.dbline 25
L7:
	.dbline 18
	rjmp L6
X1:
	.dbline -2
L5:
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbend