led_test.asm

来自「用汇编写的LED小程序」· 汇编 代码 · 共 35 行

.include "m16def.inc"
.def temp1=r20

.org $0000

rjmp reset
.org $002A

reset: 	ldi r16,high(RAMEND)
		out sph,r16
		ldi r16,low(RAMEND)
		out spl,r16
		ser temp1
		out ddrc,temp1
		out portc,temp1
		ldi r16,80
loop:	cbi portc,0
        rcall delay
		sbi portc,1
		rcall delay
		rjmp loop
delay:  push r16
del1:   push r16
del2:   push r16
del3:   dec r16
        brne del3
		pop r16
		dec r16
		brne del2
        pop r16
		dec r16
		brne del1
		pop r16
		ret