#include <p18f458.h>
#pragma interrupt chk_isr	
void chk_isr (void)
{
  if (INTCONbits.INT0IF==1)
  INT0_ISR( );			
}
#pragma code My_HiPrio_Int=0x0008 
{ 
  _asm
  GOTO chk_isr
  _endasm
}
#pragma code
void main(void)
  {
  TRISC=0x90;	  
  TRISBbits.TRISB0=1;		
  SSPSTAT=0x0;      		
  SSPCON1=0x22;     		
  INTCON2bits.INTEDG0=0;	
					
  INTCONbits.INT0IE=1; 	
  TXSTA=0x20;       	
  SPBRG=15;         	
  RCSTAbits.SPEN=1;    	
  INTCONbits.GIE=1;		
  PORTCbits.RC2=1;		
  MSDelay(1);
  SPI(0x8F);			
  SPI(0x0);			
  PORTCbits.RC2=0;		
  MSDelay(1);
  PORTCbits.RC2=1;		
  MSDelay(1);
  SPI(0x87);			
  SPI(0x08);			
  SPI(0x80);			
  SPI(0x80);			
  SPI(0x80);			
  PORTCbits.RC2=0;		
  MSDelay(1);
  PORTCbits.RC2=1;		
  MSDelay(1);
  SPI(0x8F);			
  SPI(0x01);			
  PORTCbits.RC2=0;		
  MSDelay(1);
  while(1);			
  }
void INT0_ISR()
  {
  unsigned char mess[]={0x0D,0x0A,'Y','E','S',0};
  unsigned char i;
  PORTCbits.RC2=1;		
  MSDelay(1);
  SPI(0x8F);			
  SPI(0x04);			
  PORTCbits.RC2=0;		
  MSDelay(1);
  PORTCbits.RC2=1;		
  MSDelay(1);
  SPI(0x87);			
  SPI(0x08);			
  PORTCbits.RC2=0;		
  MSDelay(1);
  for(i=0;mess[i]!=0;i++)
   TRANS(mess[i]);
  PORTCbits.RC2=1;		
  MSDelay(1);
  SPI(0x8F);			
  SPI(0x01);			
  PORTCbits.RC2=0;		
  INTCONbits.INT0IF=0;
  }