C++ using lpc1768

//led.h

#include <LPC17xx.H>


enum state_t{
        ON,
        OFF,
};


class led{

  private:
                state_t state;

  public:
                led();
                void conmutar(void);

};

// led.cpp

#include <LPC17xx.H>
#include "led.h"



led::led()
{
    LPC_GPIO1->FIODIR |= (1<<29);
}

void
led::conmutar(void)
{
    LPC_GPIO1->FIOPIN ^= (1<<29);
}

//main.cpp

#include <LPC17xx.H>
#include "led.h"

led* led_29 = new led();

/*if I remove " = new led()"
 the program runs in the board but then there is no constructor*/

extern "C" void
EINT3_IRQHandler(void)
{
        LPC_SC->EXTINT = 1 << 3; //Limpiar el flag de la EINT2.
        led_29->conmutar();
        //LPC_GPIO1->FIOPIN ^= (1<<29);
}

int
main(){

        irq_config();

        while(1);

}