volatile uint8_t count_2=0, compare_2=122;
volatile bool button_flag=false;
void init_timer(void);
void init_port(void);
void init_external_interrupt(void);

void setup() {

  init_port();
  init_external_interrupt();
  init_timer();
  Serial.begin(115200);
  // put your setup code here, to run once:

}

void loop() {

   
  if(button_flag){
    delay(500);
     Serial.println("button");
     volatile uint16_t *timer1_ocr1a=(uint16_t *)0x88; 
    *timer1_ocr1a=31250;

    compare_2=61;
    button_flag=false;


     
  }
  
  // put your main code here, to run repeatedly:

}


void init_port(void){
  //port f data direction register
  volatile uint8_t *ddr_f=(uint8_t *)0x30;
  //set bit 0, 1, 2 as output
  *ddr_f=0x03;

}


void init_timer(void){
  //timer 1
  volatile uint8_t *timer1_tccr1a=(uint8_t *)0x80;
  volatile uint8_t *timer1_tccr1b=(uint8_t *)0x81;
  volatile uint16_t *timer1_tcnt1=(uint16_t *)0x84;
  volatile uint16_t *timer1_ocr1a=(uint16_t *)0x88;  
  volatile uint8_t *timer1_tmsk1=(uint8_t *)0x6f;
 

   //configuring timer1 registers
  *timer1_tccr1a=0;
  *timer1_tccr1b=0x0d;
  *timer1_tcnt1=0;
  *timer1_ocr1a=15625;
  *timer1_tmsk1=0x02;
  
  //timer 2
  volatile uint8_t *timer2_tccr2a=(uint8_t *)0xb0;
  volatile uint8_t *timer2_tccr2b=(uint8_t *)0xb1;
  volatile uint8_t *timer2_tcnt2=(uint8_t *)0xb2;
  volatile uint8_t *timer2_ocr2a=(uint8_t *)0xb3;  
  volatile uint8_t *timer2_tmsk2=(uint8_t *)0x70;

  //configuring timer2 registers
  *timer2_tccr2a=0x02;
  *timer2_tccr2b=0x07;
  *timer2_tcnt2=0;
  *timer2_ocr2a=255;
  *timer2_tmsk2=0x02;



}


ISR(TIMER1_COMPA_vect){
  //port f output register
  volatile uint8_t *out_f=(uint8_t *)0x31;
  //toggle bit 0 of port f
  *out_f^=0x01;

}

ISR(TIMER2_COMPA_vect){
 
  count_2++;
 
  if(count_2==compare_2){
    //port f output register
                                                                                                                                                                     
    volatile uint8_t *out_f=(uint8_t *)0x31;       
    //toggle bit 1 of port f
    *out_f^=0x02;
    count_2=0;
  }

}

void init_external_interrupt(void){

  volatile uint8_t *eicra=(uint8_t *)0x69;
  volatile uint8_t *eimsk=(uint8_t *)0x3d;


  *eicra=0x03;
  *eimsk=0x01;
}


ISR(INT0_vect){
    button_flag=true;
    Serial.println("ulla vanthuten");
   
    //else{
    //  Serial.println("Not pressed");
    //}
  //  delay(1000);
}