初始化

uint16_t tim1_irq_com_flg=0;
void tim1_init(void)
{
//1分频，向上计数，每50us定时中断一次， 重复计数器值为0   
 TIM1_TimeBaseInit(0,TIM1_COUNTERMODE_UP,800,0);     
 TIM1_ARRPreloadConfig(ENABLE);
 TIM1_ITConfig(TIM1_IT_UPDATE , ENABLE);
 TIM1_Cmd(ENABLE);
}

中断处理

INTERRUPT_HANDLER(TIM1_UPD_OVF_TRG_BRK_IRQHandler, 11)
{
  /* In order to detect unexpected events during development,
     it is recommended to set a breakpoint on the following instruction.
  */
tim1_irq_com_flg++;
TIMER1_Decrement();
  TIM1_ClearITPendingBit(TIM1_IT_UPDATE);
}