atmel_test_code_01

#include <avr/io.h>
#define F_CPU 8000000
#include <util/delay.h>

int main(void)
{
    DDRB = 0xFF;
    PORTB = 0x00;

    while (1)
    {
        PORTB ^= 0b00000001;
        _delay_ms(200);
    }
}