#include <TimerFive.h>
/// Código biblioteca Button para Tinkercad
class Button
{
	public:
		Button(uint8_t pin);
		void begin();
		bool read();
		bool toggled();
		bool pressed();
		bool released();
		bool has_changed();

		const static bool PRESSED = LOW;
		const static bool RELEASED = HIGH;

	private:
		uint8_t  _pin;
		uint16_t _delay;
		bool     _state;
		bool     _has_changed;
		uint32_t _ignore_until;
};

Button::Button(uint8_t pin)
:  _pin(pin)
,  _delay(100)
,  _state(HIGH)
,  _ignore_until(0)
,  _has_changed(false)
{
}

void Button::begin()
{
	pinMode(_pin, INPUT_PULLUP);
}

//
// public methods
//

bool Button::read()
{
	// ignore pin changes until after this delay time
	if (_ignore_until > millis())
	{
		// ignore any changes during this period
	}

	// pin has changed
	else if (digitalRead(_pin) != _state)
	{
		_ignore_until = millis() + _delay;
		_state = !_state;
		_has_changed = true;
	}

	return _state;
}

// has the button been toggled from on -> off, or vice versa
bool Button::toggled()
{
	read();
	return has_changed();
}

// mostly internal, tells you if a button has changed after calling the read() function
bool Button::has_changed()
{
	if (_has_changed == true)
	{
		_has_changed = false;
		return true;
	}
	return false;
}

// has the button gone from off -> on
bool Button::pressed()
{
	if (read() == PRESSED && has_changed() == true)
		return true;
	else
		return false;
}

// has the button gone from on -> off
bool Button::released()
{
	if (read() == RELEASED && has_changed() == true)
		return true;
	else
		return false;
}

//----------------


byte tabla7seg[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
byte pines_display[7] = {3, 4, 5, 6, 7, 8, 9};
byte pines_pantalla[4] = {14, 15, 16, 17};  
unsigned int contador = 0; 


#define BOTON_STOP 11
Button boton_parar = Button(BOTON_STOP);


volatile bool actualizar = false;


void saca7seg(int n) {
  for (int i = 0; i < 7; i++) {
    digitalWrite(pines_display[i], bitRead(tabla7seg[n], i));
  }
}


void segundero(int numero) {
  int unidades = numero % 10;
  int decenas = numero / 10;

  digitalWrite(pines_pantalla[0], HIGH); 
  saca7seg(decenas);
  digitalWrite(pines_pantalla[1], LOW);  
  delay(10);
  digitalWrite(pines_pantalla[1], HIGH);

  digitalWrite(pines_pantalla[1], HIGH); 
  saca7seg(unidades);
  digitalWrite(pines_pantalla[0], LOW);  
  delay(10);
  digitalWrite(pines_pantalla[0], HIGH);
}


void ISR_pantalla() {
  actualizar = true;  
}


void setup() {
  boton_parar.begin();

  for (int i = 0; i < 7; i++) {
    pinMode(pines_display[i], OUTPUT);
    digitalWrite(pines_display[i], LOW);
  }

  for (int i = 0; i < 2; i++) {
    pinMode(pines_pantalla[i], OUTPUT);
    digitalWrite(pines_pantalla[i], HIGH); 
  }

 
  Timer5.initialize(1000000);
  Timer5.attachInterrupt(ISR_pantalla);
}
void parar(){
if (boton_parar.pressed()) {
    saca7seg(contador=0);
}}


void loop() {
  if (actualizar) {
    contador++;
    if (contador >= 60) contador = 0;
    actualizar = false;
  }
	parar();
  segundero(contador);
}