#include <atmega.h>

class Voltimetro{
  
public:
  Voltimetro(){ timer =0;};
  ~Voltimetro(){};
  
  inline void init(){
    mega = (struct LAYOUT * ) IO_MEMORY_OFFSET; 
    mega->ddrb   = SET;       // prepare leds
    mega->portb  = 0xFF; 

//    mega->sreg   = 0x80 ; //global interruption enable bit
    mega->sreg   |= 1<<7 ; //global interruption enable bit
    mega->sfior  = 0; // Set ADTS in SFIOR to 000 - Free running mode
    mega->adcsra = 0xC8; // Set ADEN in ADCSRA - ADC enable
//  mega->adcsra |= (1<<3); // Set ADIE in ADCSRA - convertion interrupt enable
//    mega->adcsra &= ~(0x7); // Set ADSP in ADCSRA to 0 - division by 2
    mega->admux  = 0x60;

	//led_test();
  }; 

  inline void sleep() {
    for (unsigned int j=0;j<0xFFF;j++);
  };

  inline void led_test() {
    mega->portb = 0x00; //debug
    
    for (int i=0;i<7;i++) {
    	mega->portb ^= 1<i; //debug
	    sleep();
    }
    for (int i=7;i>=0;i--) {
    	mega->portb ^= 1<i; //debug
	    sleep();
	}
    mega->portb = 0xFF; //debug
  }

  inline void enable_int(){
/*    mega->admux  |=  (1<<6); // Set REFS0 to 1 in ADCSRA AVC target
    mega->admux  &= ~(1<<7); // Set REFS1 to 0 in ADCSRA AVC target
    mega->admux  |=  (1<<5); // Set ADLAR to 1 in ADCSRA Left adjust
    mega->admux  &= ~(15);  // Set MUX4:0 to 0 in ADCSRA ADC0*/
 //   mega->adcsra |= (1<<5); // Set ADATE in ADCSRA - autotrigger
//    mega->sfior  |=     (1); // Set ADTS in SFIOR to 001 - Analog Comparator  
  };

  //page 34 stop the timer
/*  inline void clock_stop(){
     mega->tccr0 &= ( 0<<2 | 0<<1 | 0<<0 );
     timer=0;
  };
  //page 34 enable the timer clock as CK/1024 
  inline void clock_start(){
    //we neet to set the overflow time
    mega->tccr0 |=  (1<<2) | (1<<0) ;
    mega->tccr0 &=  ~(1<<1);
  };

  inline void key_event() {
    //BUTTON3 Pressed
    //mcu bit 3 and 2 
    //1 0  falling
    //1 1  rising
    mega->portb ^= 1;//debug
    if (mega->mcucr & (1<<2)) {
      mega->mcucr &= ~(1<<2);
      clock_stop();
    mega->portb ^= 2;//debug
      mega->portb |= 8; 
    } else {
      mega->mcucr |= (1<<2);
      clock_start();
   mega->portb ^= 4; //debug
    }
  }
*/
    
   void adc_event() {

    //   led_test();
       display(mega->adch);
       mega->adcsra |= 0x40;
   }

  inline void display(unsigned char valor) {    
     mega->portb = ~valor;
  }

//  private:
  LAYOUT *mega;
  unsigned int timer;
};

/******************************************/

Voltimetro k;

//wrapper
/*void key_int(){
  k.key_event();
};

void timer_int(){
  k.timer++;
  if(k.timer == 15){
    k.timer = 0;
    k.clock_stop();
    k.mega->portb ^=8;
  }

  k.mega->portb ^= 16;
};*/
// interruption handlers 


void adc_int(){
    k.adc_event();
}

extern "C"{

/*  void __vector_2 (void) __attribute__((signal));
  void __vector_2 (void) {
    key_int();
  };
  */

  void __vector_14 (void) __attribute__((signal));
  void __vector_14 (void) {
    adc_int();
  };

};

/******************************************/

/*
MAIN
*/

int main(){
  k.init();
  k.enable_int();
  k.led_test();
  while(true);
/* { 
    k.mega->adcsra |= 1<<6;
    k.mega->portb=~k.mega->adch;
    k.mega->adcsra &= ~1<<6;
    
  }*/


};