sbit LedD1 at GPIO.B5;
sbit LedD2 at GPIO.B4;
sbit LedD3 at GPIO.B2;
sbit LedD4 at GPIO.B1;
sbit LedD5 at GPIO.B0;

unsigned char ActiveLeds;

void init()
{
   TRISIO = 0x08, // On configure l'entrée GP3 en entrée
   GPIO = 0x00;  // On met les sorties à l'état logique bas "0"
   
   CMCON = 0x07;  // On désactive le module de comparaison
   ADCON0 = 0x00; // On désactive le module Analogique Numérique (pas de consommation de courant)
   ANSEL = 0x00;  // On configure toutes les broches en sortie numérique
   
   TMR1ON_bit = 1; // On active le TIMER1

   T1CKPS0_bit = 1; //|
   T1CKPS1_bit = 1; //| On configure le prescaler à 1:8

   TMR1CS_bit = 0; // On utlise l'horloge interne (Fosc/4)

   INTCON.GIE = 1; // On active les interruptions générales
   INTCON.PEIE = 1; // et on active les masques d'interrutpion

   PIE1.TMR1IE = 1; // On active les interruptions du TIMER1
   PIR1.TMR1IF = 0;  // On met à zéro le drapeau de débordement

   TMR1L = 0x00;  // On commence à zéro pour compter!
   TMR1H = 0x00;

   ActiveLeds = 1; // Permet d'activer à tour de rôle les leds
}

void interrupt()
{

if (GPIO.GP3 == 1)
{
   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 1))
    {
      LedD1 = 1;
      LedD2 = 0;
      LedD3 = 0;
      LedD4 = 0;
      LedD5 = 1;
      ActiveLeds = 2;
      PIR1.TMR1IF = 0;
    }
    
   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 2))
    {
      LedD1 = 1;
      LedD2 = 1;
      LedD3 = 0;
      LedD4 = 0;
      LedD5 = 0;
      ActiveLeds = 3;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 3))
    {
      LedD1 = 0;
      LedD2 = 1;
      LedD3 = 1;
      LedD4 = 0;
      LedD5 = 0;
      ActiveLeds = 4;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 4))
    {
      LedD1 = 0;
      LedD2 = 0;
      LedD3 = 1;
      LedD4 = 1;
      LedD5 = 0;
      ActiveLeds = 5;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 5))
    {
      LedD1 = 0;
      LedD2 = 0;
      LedD3 = 0;
      LedD4 = 1;
      LedD5 = 1;
      ActiveLeds = 1;
      PIR1.TMR1IF = 0;
    }
  }
  
 if (GPIO.GP3 == 0)
 {
  
   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 1))
    {
      LedD1 = 1;
      LedD2 = 0;
      LedD3 = 0;
      LedD4 = 0;
      LedD5 = 0;
      ActiveLeds = 2;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 2))
    {
      LedD1 = 0;
      LedD2 = 1;
      LedD3 = 0;
      LedD4 = 0;
      LedD5 = 0;
      ActiveLeds = 3;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 3))
    {
      LedD1 = 0;
      LedD2 = 0;
      LedD3 = 1;
      LedD4 = 0;
      LedD5 = 0;
      ActiveLeds = 4;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 4))
    {
      LedD1 = 0;
      LedD2 = 0;
      LedD3 = 0;
      LedD4 = 1;
      LedD5 = 0;
      ActiveLeds = 5;
      PIR1.TMR1IF = 0;
    }

   if ((PIR1.TMR1IF == 1) && (ActiveLeds == 5))
    {
      LedD1 = 0;
      LedD2 = 0;
      LedD3 = 0;
      LedD4 = 0;
      LedD5 = 1;
      ActiveLeds = 1;
      PIR1.TMR1IF = 0;
    }
  }
}


void main() 
{
    init();
    
    while (1)
    {
     // On ne fait rien dans le programme principal
    }
}