为什么stm32定时器三只能进一次中断？第一次正常进入，然后就再也进不去了。

醉春秋

void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  /* Enable the TIM3 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
       
  NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
       
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
void TIM3_IRQHandler(void)
{
  u16 new_step_delay;
  static u16 last_accel_delay;
  static u16 rest = 0;
        if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)
                {
                        TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);
                }
。。。。。。
}



main()
{
......
                       TIM3->CCR1=100;
                        TIM3->ARR=100;
                        TIM_Cmd(TIM3, ENABLE);
                }
第二次调用     TIM3->CCR1=100;
                        TIM3->ARR=100;
                        TIM_Cmd(TIM3, ENABLE);的时候就不能进中断了...

醉春秋

问题解决了，中断结束忘记失能了。