Page 115 - MDP2020-3

················································································ 명장양성프로젝트 【MDP】 과제발표회 자료집 Ⅲ | 109

TIMSK = 0b00000001; //tc0 ovf interrupt : enable;
}

interrupt [EXT_INT2] void echo_finish()
{
//카운터 종료
TIMSK = 0b00000000; //tc0 ovf interrupt : disable;

//distance(cm) = uS / 58(SPEC)
printf("raw : %d, distance(cm) : %d\r", dist, (dist/24));
dist = 0;
}

interrupt [TIM0_OVF] void measure_dist()
{
//every 1us
dist ++;

TCNT0 = 253; //TCNT0 Reinitialize
}

void main()
{
i = 0;

DDRA = 0xff;
DDRB = 0xff;

DDRC = 0xff;
DDRD = 0x00;
DDRE = 0xff;

PORTA = 0x01;

init_uart0();
TC0_cnt();
init_interrupt();
SREG = 0x80;

while(1){
test_SONIC();
delay_ms(500);

}
}