#include <p18F458.h>
#define myPC0bit PORTCbits.RC0
#define myPC1bit PORTCbits.RC1
void chk_isr(void);
void chk_low_isr(void);
void T0_ISR(void);
void T1_ISR(void);
void TX_ISR(void);
void RC_ISR(void);
#pragma code My_HiPrio_Int =0x0008 
void My_HiPrio_Int (void)
{
_asm
GOTO chk_isr
_endasm
}
#pragma code My_Lo_Prio_Int =0x00018 
void My_Lo_Prio_Int (void)
{
	_asm
		GOTO chk_low_isr
	_endasm
}
#pragma interruptlow chk_low_isr	
void chk_low_isr (void)
{
	if(PIR1bits.TMR1IF==1)
	  T1_ISR(); 		
	if (PIR1bits.TXIF==1)	
  	  TX_ISR( );		
}
#pragma interrupt chk_isr
void chk_isr (void)
{
	if (PIR1bits.TMR1IF==1)
		T0_ISR( );		
	if (PIR1bits.RCIF==1)	
		RC_ISR( );		
}
void main(void)
  {
	TRISCbits.TRISC0=0;	
	TRISCbits.TRISC1=0;	
	TRISD = 255;		
	TRISB = 0; 		
   	T0CON=0x08;		
					
	TMR0H=0xFF;		
	TMR0L=0x00;		
	INTCONbits.TMR0IF=0; 	
	T1CON=0x0;	
	TMR1H=0xFF;		
	TMR1L=0x00;		
	PIR1bits.TMR1IF=0;	
	TXSTA=0x20;		
	SPBRG=15;			
	RCSTAbits.CREN=1;
	RCSTAbits.SPEN=1; 
	TRISCbits.TRISC6=0;	
	TRISCbits.TRISC7=1;	
	RCONbits.IPEN=1;
	PIE1bits.RCIE=1;
	PIE1bits.TXIE=1; 	
	INTCONbits.TMR0IE=1;
	PIE1bits.TMR1IE=1;
	IPR1bits.TMR1IP=0;	
	IPR1bits.TXIP=0;		
	T0CONbits.TMR0ON=1;	
	T1CONbits.TMR1ON=1;	
	INTCONbits.GIEL=1;	
	INTCONbits.GIEH=1;
	while(1);		
  }
void T0_ISR(void)
  {
	TMR0H=0xFF;		
	TMR0L=0x00;		
	myPC0bit=~myPC0bit;	
	INTCONbits.TMR0IF=0;	
  }
void T1_ISR(void)
  {
	TMR1H=0xFF;		
	TMR1L=0x00;		
	PIR1bits.TMR1IF=0;	
	myPC1bit=~myPC1bit;	
  }
void TX_ISR(void)
  {
    TXREG=PORTD;	
  }
void RC_ISR(void)
  {
	PORTB=RCREG;
	RCSTAbits.CREN=0;
	RCSTAbits.CREN=1;
  }