#include <p18f4550.h>

#pragma config PLLDIV   = 5
#pragma config CPUDIV   = OSC1_PLL2
#pragma config USBDIV   = 2
#pragma config FOSC     = HS
#pragma config FCMEN    = OFF
#pragma config IESO     = OFF
#pragma config PWRT     = OFF
#pragma config BOR      = ON
#pragma config BORV     = 1
#pragma config VREGEN   = ON
#pragma config WDT      = OFF
#pragma config WDTPS    = 32768
#pragma config MCLRE    = ON
#pragma config LPT1OSC  = OFF
#pragma config PBADEN   = OFF
#pragma config CCP2MX   = ON
#pragma config STVREN   = ON
#pragma config LVP      = OFF
#pragma config XINST    = OFF
#pragma config CP0      = OFF
#pragma config CP1      = OFF
#pragma config CP2      = OFF
#pragma config CPB      = OFF
#pragma config CPD      = OFF
#pragma config WRT0     = OFF
#pragma config WRT1     = OFF
#pragma config WRT2     = OFF
#pragma config WRTB     = ON
#pragma config WRTC     = OFF
#pragma config WRTD     = OFF
#pragma config EBTR0    = OFF
#pragma config EBTR1    = OFF
#pragma config EBTR2    = OFF
#pragma config EBTRB    = OFF

void szunet (void)
{
  int i;

  for (i = 0; i < 25000; i++);
}

void main (void)
{
  TRISD = 0b00000000;

  while (1)
    {

      PORTD = 0b00000000;

      szunet ();

      PORTD = 0b00000001;

      szunet ();
    }
}