#include<avr/io.h>

#include<util/delay.h>

int main(void)

{DDRD=0x00;     // PORTD declared as input port

PORTD=0xFF;    // PORTD initialized

DDRC=0XFF;       // PORTC declared as output port

PORTC=0x00;     // PORTC initialized

while(1)

{

if(!(PIND&0x01))            // PIN D0 is used as input

{

_delay_ms(500);

while(!(PIND&0x01))

PORTC=0b00000010;       // motor rotates in one particular direction

}

else if(!(PIND&0x02))      // PIN D1 is used as another input

{

_delay_ms(500);

while(!(PIND&0x02))

PORTC=0b00000001;        // motor rotates in another direction

}

else

{

PORTC=0x00;           // Stop motor

}

}

}