#define F_CPU 8000000UL

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

class Car
{
private:
    bool getKey(void) const;
public:
    Car(void);
    void run(void);
    void write(bool onebyte = false) const;
};

Car::Car(void)
{
    DDRB = 0x01;
    PORTB = 0x01;
    DDRD = 0x00; // PD7設為輸入
    PORTD = 0x80; // PD7設為帶上拉電阻的輸入
}

bool Car::getKey(void) const
{
    return ((PIND & 0x80) == 0);
}

void Car::run(void)
{
    while (1)
    {
        if (getKey())
        {
            _delay_ms(1000);
            PORTB ^= 0x01;
        }
        else
            PORTB = 0x00;
    }
}

void Car::write(bool onebyte) const
{
    if (onebyte)
        eeprom_write_byte((uint8_t *)15, 0xa3);
    else
        eeprom_write_block("This is a string.", (void *)0, 17);
}

int main(void)
{
    Car car;
    car.run();
    return 0;
}