怎么屏蔽启动TIMx瞬间产生的更新中断?

2020-01-01 17:54发布

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8条回答

2nd090215

1楼-- · 2020-01-01 21:20

用得万利的板子 IAR4.42

2nd090215

2楼-- · 2020-01-01 23:22

int main(void)
{
#ifdef DEBUG
  debug();
#endif

  /* System Clocks Configuration */
  RCC_Configuration();

  /* NVIC configuration */
  NVIC_Configuration();

  /* Configure the GPIO ports */
  GPIO_Configuration();

// TIM_DeInit (TIM4 );
  /* Time base configuration */
// TIM_TimeBaseStructure.TIM_Period = 65535;
//  TIM_TimeBaseStructure.TIM_Prescaler = 1;
  TIM_TimeBaseStructure.TIM_Period = 6000;
  TIM_TimeBaseStructure.TIM_Prescaler = 65535;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

  /* TIM4 configuration in Input Capture Mode */

  TIM_ICStructInit(&TIM_ICInitStructure);

  TIM_ICInitStructure.TIM_ICMode = TIM_ICMode_ICAP;
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter = 0;

  TIM_ICInit(TIM4, &TIM_ICInitStructure);

  /* One Pulse Mode selection */
//  TIM_SelectOnePulseMode(TIM4, TIM_OPMode_Single);

  TIM_ITConfig(TIM4, TIM_IT_Update , ENABLE);

  TIM_ITConfig(TIM4, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4 | TIM_IT_Trigger , DISABLE);

  MySetBitUrs(TIM4);

/* Input Trigger selection */
  TIM_SelectInputTrigger(TIM4, TIM_TS_TI1FP1);

  /* Slave Mode selection: Trigger Mode */
  TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Trigger);

  while (1)
  {
  }
}

2nd090215

3楼-- · 2020-01-02 01:52

u8 readvalue=1;
void TIM4_IRQHandler(void)
{
  if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
  {
      TIM_ClearITPendingBit(TIM4, TIM_IT_Update );
readvalue = GPIO_ReadInputDataBit( GPIOD, GPIO_Pin_12 );
      if(readvalue==0)
      {
         GPIO_SetBits(GPIOC, GPIO_Pin_7);
      }
      else
      GPIO_SetBits(GPIOC, GPIO_Pin_6);
}

}