#include <p18f458.h>
void main()
  {
  TRISC = 0xFB;     		
  TRISD = 0x80;     		
  CCP1CON = 0x3C;   		
  PR2=100;          		
  T2CON=0x01;       		
  while(1)
    {
    if(PORTDbits.RD7==1)
      CCPR1L = 25;		
    else
      CCPR1L = 50;		
    TMR2=0x0;			
    PIR1bits.TMR2IF=0;	
    T2CONbits.TMR2ON=1;	
    while(PIR1bits.TMR2IF==0);
    }
  }