为什么我的这段程序进不去 T0 中断啊

只看该作者 · 2011-8-4 13:40

#include <config.h>

#define led1  (1<<22)
#define led2  (1<<23)
#define led3  (1<<24)
#define led4  (1<<25)

///////////////////////////////////////////////////////////////////////
__irq __arm void irq_t0_led (void)
{
  while(1);
}
///////////////////////////////////////////////////////////////////////
void  int_timer_irq()
{
  T0TCR=0x00;
  VICVectAddr0=0x00;
  VICVectCntl0=0x00;
  VICIntSelect=0x00000000;
  VICVectCntl0=((1<<5)|0x04);
  VICVectAddr0=(uint32)irq_t0_led;
  T0IR=(T0IR|0x01);
  VICIntEnable=1<<4;

  T0PR=99;
  T0MCR=0x03;
  T0MR0=Fpclk/(99+1)/2;
  T0TCR=0x03;
  T0TCR=0x01;

}
///////////////////////////////////////////////////////////////////////
void  int_pll()
{
  PLLCON=1;
  switch(Fcclk/Fpclk)
  {
case  1: APBDIV=1; break;
case  2: APBDIV=2; break;
case  4: APBDIV=0; break;
  }
  switch(Fcco/Fcclk)
  {
case  2: PLLCFG=((Fcclk/Fosc)-1)|(0<<5);break;
case  4: PLLCFG=((Fcclk/Fosc)-1)|(1<<5);break;
case  8: PLLCFG=((Fcclk/Fosc)-1)|(2<<5);break;
case 16: PLLCFG=((Fcclk/Fosc)-1)|(3<<5);break;
  }
  PLLFEED=0xaa;PLLFEED=0x55;
  while(PLLSTAT&(1<<10)==0);
  PLLCON=3;
  PLLFEED=0xaa;PLLFEED=0x55;
}
///////////////////////////////////////////////////////////////////////
void  main(void)
{
  PINSEL0=0x00000050;
  PINSEL1=0x00000000;
  IO0DIR=(led1|led2|led3|led4);
  int_pll();
  int_timer_irq();
  while(1)
  {
  }
}