#include <p18f4580.h>
void T3Delay(void);
#define mybit PORTBbits.RB1
void main(void)
  {
	TRISBbits.TRISB1=0;		
    T3CON=0x00;			
    while(1)
      {
        mybit=~mybit;			
        T3Delay();
      }
  }
void T3Delay()
  {	
    TMR3H=0xFE;				
    TMR3L=0x0C;				
    T3CONbits.TMR3ON=1;		
    while(PIR2bits.TMR3IF==0);	
    T3CONbits.TMR3ON=0;		
    PIR2bits.TMR3IF=0;		
  }