#define F_CPU 1000000UL
#include <util/delay.h>
#include <avr/io.h>
#include <avr/interrupt.h>

//declare timers
void T1Delay();

// defines pins numbers
int ledRPin = PB5;//assign Redled to pin number 13
int ledGPin = PB4;//assign greenled to pin number 13
int buttonPin = PD2; // assign button to pin 2
int pirPin = PD7; // assign PIR sensor pin 7

// defines variables
int flag = 0;

ISR(INT1_vect) {
  flag++;
}
void setup() {
  DDRB |= 0B00110000; //D4,D5 LED light OUTPUT
  DDRD &= 0B01111011;//D2,D7 sensor INPUT
  
  Serial.begin(9600);
  //pinMode(ledRPin , OUTPUT);
  //PORTB |= (1 << ledRPin); // turn ON LED
  //delay(1000);
  //PORTB &= ~(1 << ledRPin); // Turn Off LED
  //delay(1000);

  //PORTB |= (1 << ledGPin); // turn ON LED
  //delay(1000);
  //PORTB &= ~(1 << ledGPin); // Turn Off LED
  //delay(1000);
  //interrupt configuration
  //EIMSK =(1<<INT1);    //enable INT1
  //EICRA =(1<<ISC10);  // specify type
  //sei ();              // enable global INT

}

void loop() {
  Serial.println("inside loop");


  if (!(PIND & (1 << buttonPin))) { // if pin 12 low
    //if(PIND & 0b10000000){//check input sonsor bitD7
    PORTB |= (1 << ledRPin); // turn ON LED
    delay(1000);
    PORTB =  PORTB | 0b00010000; //to set bitb4 to 1 to On green led
    delay(1000);
    Serial.println("motion detected");
    T1Delay();
  }
  else {
    PORTB &= ~(1 << ledRPin); // Turn Off LED
    PORTB = PORTB & 0b11101111; //to clear bit4 no light
    Serial.println("motion ended");
  }
  T1Delay();
  return 0;
}





//timers configuration
void T1Delay() {
  TCNT1H = 0; //we need value??
  TCNT1L = 0;
  TCCR1A = 0x00; //normal mode
  TCCR1B = 0x01; //no prasc
  while ((TIFR1 & (0x1 << TOV1)) == 0); //wait for T0V0
  TCCR1B = 0x00;
  TIFR1 = 0x1 << TOV1; //clear TOV1
}