gistfile1.txt

#include <18f4520.h>
#use delay (clock=20000000)
#fuses HS, NOWDT, NOLVP
#include "../Library/18f4520ptr.h"
#include "../Library/modifiedlcd.h"

int push=1;

#INT_EXT
void int_ext_isr(){
   push++;
   *CCPR1=25;
   *CCPR1=*CCPR1*Push;
   if(push==4){
      push=1;
      *CCPR1=25;
      
   }
}

main(){
   *TRISB=0x01;
   *TRISC=0x00;
   T2CON->TMR2ON=1;
   CCP1CON->CCPxMx=12;
   *CCPR1=25;
   *PR2=100;
   INTCON->GIE=1;
   INTCON->PEIE=1;
   INTCON->INT0IE=1;
   INTCON2->INTEDG0=1;
   while(1){
   }
}