juchi.s

锯齿波产生程序 megal128 iccavr开发平台

	.module juchi.c
	.area text(rom, con, rel)
	.dbfile E:\ATMEGA~1\锯齿波产生程序\juchi.c
	.dbfunc e delay _delay fV
;              i -> R20,R21
;              t -> R16,R17
	.even
_delay::
	xcall push_gset1
	.dbline -1
	.dbline 3
; #include <iom128v.h>
; void delay(unsigned int t)
; {
	.dbline 5
;  unsigned int i;
;  for(i=0;i<t;i++)
	clr R20
	clr R21
	xjmp L5
L2:
	.dbline 6
L3:
	.dbline 5
	subi R20,255  ; offset = 1
	sbci R21,255
L5:
	.dbline 5
	cp R20,R16
	cpc R21,R17
	brlo L2
	.dbline -2
L1:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r t 16 i
	.dbend
	.dbfunc e main _main fV
;              c -> R20
	.even
_main::
	.dbline -1
	.dbline 9
;     ;
; }
; void main(void)
; {
	.dbline 11
;   unsigned char c;
;   c=0;
	clr R20
	.dbline 12
;   DDRA=0xff;
	ldi R24,255
	out 0x1a,R24
	.dbline 13
;   for(;;)
L7:
	.dbline 14
	.dbline 15
	mov R2,R20
	subi R20,255    ; addi 1
	out 0x1b,R2
	.dbline 16
	ldi R16,10
	ldi R17,0
	xcall _delay
	.dbline 17
	.dbline 13
	.dbline 13
	xjmp L7
X0:
	.dbline -2
L6:
	.dbline 0 ; func end
	ret
	.dbsym r c 20 c
	.dbend