#include <p18f4610.h>

void timer0 (void);
unsigned char time20;
void main (void)
{
  
  unsigned char a,b,c;
  a=0;
  b=0;
  c=0;
  RCONbits.IPEN = 1;
  INTCON2bits.TMR0IP = 1;//TMRO為高優先級HH
  IPR2bits.TMR3IP=1;//TMR3為高優先級
  INTCON = 0X20;//TMROIE使能，其它中斷關閉，總中斷關閉HH
  PIE2bits.TMR3IE=1;//TMR3IE使能
  T1CON=0X8F;
  TMR0H=0X63;
  TMR0L=0Xbf;//20ms
  T0CON = 0X88;//TMRO計數開始。不分頻即Tosc/4 HH
  INTCONbits.GIE= 1;//開所有中斷HH INTCON.GIE=1;//開所有中斷HH
  while(1)
  {
    
     if(time20==1)
     {
      time20=0;
      c++;
      if(c==100)
      {
        a++;
        c=0;
      }
      if(a==60)
      {
        b++;
        a=0;
      }
      if(b==250)
        b=0;
     }
   }
}
//高優先級中斷處理
#pragma code high_vector=0x008
void
high_vector (void)
{
  _asm 
   goto timer0
  _endasm
}
//高優先級中斷處理
//timer0中斷處理
#pragma code
#pragma interrupt timer0

void
timer0 (void)
{
  if (INTCONbits.TMR0IF)
 {
   INTCONbits.TMR0IF = 0;
   TMR0H=0X63;
   TMR0L=0Xbf;//重裝20ms
   time20 = 1;
 }
}
//timer0中斷處理