定时器（查询）

#include <iocc2540.h>
#include "timer.h"


void timer1_init(void)
{
  T1CTL &= ~((3<<0)|(3<<2));
  T1CTL |= ((1<<0)|(1<<2));//自由模式  8分频
  
}


#include "led.h"
#include "timer.h"
void main(void)
{
  unsigned int count=0;
  
  led_init();
  timer1_init();
  
  while(1)
  {
    if (IRCON &(1<<1))//系统时钟32MHZ，8分频后为4MHZ，0xffff*1S/4MHZ=16384us 500ms/16384us=30.517578125
    {
      count++;
      if (count>32)
      {
        count = 0;
        LED1 = !LED1;
      }
      IRCON &= ~(1<<1);
      
    }
  }
}