Practica 1 sistemas embebidos c

#include<16F877a.h>
#fuses XT, PUT, NODEBUG , NOBROWNOUT , NOPROTECT , NOLVP
#use delay(clock=4000000)


void main()
{

  int i = 1;
  set_tris_d(0x00);

   while(true)
   {
      if(i==0)
         i=1;

      output_d(i);
      delay_ms(1000);
      i+=i;
   }
}