/*
#include <avr/io.h>

void delay_normal_mode(uint16_t delay_count) {
    TCCR1A = 0x00; 
    TCCR1B = 0x05; 

    TCNT1 = 0;

    while (TCNT1 < delay_count) {

    }

    TCCR1B = 0x00;
}

int main(void) {
    DDRB |= (1 << PB0); 

    while (1) {
        PORTB |= (1 << PB0);

        delay_normal_mode(15625); 

        PORTB &= ~(1 << PB0);

        delay_normal_mode(15625);
    }
}
*/

#include <avr/io.h>

void delay_ctc_mode(uint16_t compare_value) {

    TCCR1A = 0x00; 
    TCCR1B = 0x0D; 

    OCR1A = compare_value;

    TCNT1 = 0;

    while (!(TIFR1 & (1 << OCF1A))) {
        
    }

    TIFR1 |= (1 << OCF1A);

    TCCR1B = 0x00;
}

int main(void) {
    DDRB |= (1 << PB0); 

    while (1) {
        PORTB |= (1 << PB0);

        delay_ctc_mode(15625); 

        PORTB &= ~(1 << PB0);

        delay_ctc_mode(15625);
    }
}