BLINKING A LED

Circuit diagram includes connecting a LED with resistor in series in PORTB5, its digital 13 on Aruino.

Blink LED method 1

#define F_CPU 16000000

#include <avr/io.h>
#include <util/delay.h>

int main(void)
{
   
DDRB |= (1 << PORTB5);
    while (1)
    {
PORTB |= (1 << PORTB5);
_delay_ms(200);
PORTB &= ~(1<< PORTB5);
_delay_ms(100);

    }
}

Blink LED method 2

#define F_CPU 16000000

#include <avr/io.h>

#include <util/delay.h>

int main(void)

{

    

DDRB |= (1 << PORTB5);

    while (1) 

    {

PINB |= (1 <<PINB5);

_delay_ms(100);

    }

}