.include "8535def.inc"
.org $000
 rjmp main
main:   ldi r16,low(ramend) ;棧指針置初值
        out spl,r16
        ldi r16,high(ramend)
        out spH,r16
        ldi r16,$07         ;上升沿計(jì)數(shù)
        out tccr0,r16
        ldi r16,0           ;T/C0置初值0
        out tcnt0,r16
        ldi r16,$ff         ;PC口作輸出
        out ddrc,r16
loop:   in r16,tcnt0
        out portc,r16
        rjmp loop