C Program
#include<avr/io.h> //This is the header for AVR Microcontroller.
#include <util/delay.h> //header file to generate time delay.
int main(void)
{
DDRB=0x0F;
DDRC=0X00; //sensor initilization
while(1)
{
if((PINC&0x01)==0x00) //checking sensor getting obstacle or not
{
PORTB=0x00;
//Switch on all 4 LEDs
//Delay of 1sec=1000msec
}
else
{
PORTB=0xFF;
}
}
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