[嵌入式]STM32中TIM_ClearFlag和TIM_ClearITPendingBit有什么区别

STM32中TIM_ClearFlag和TIM_ClearITPendingBit有什么区别

/**
  * @brief  Clears the TIMx's pending flags.
  * @param  TIMx: where x can be 1 to 17 to select the TIM peripheral.
  * @param  TIM_FLAG: specifies the flag bit to clear.
  *   This parameter can be any combination of the following values:
  *     @arg TIM_FLAG_Update: TIM update Flag
  *     @arg TIM_FLAG_CC1: TIM Capture Compare 1 Flag
  *     @arg TIM_FLAG_CC2: TIM Capture Compare 2 Flag
  *     @arg TIM_FLAG_CC3: TIM Capture Compare 3 Flag
  *     @arg TIM_FLAG_CC4: TIM Capture Compare 4 Flag
  *     @arg TIM_FLAG_COM: TIM Commutation Flag
  *     @arg TIM_FLAG_Trigger: TIM Trigger Flag
  *     @arg TIM_FLAG_Break: TIM Break Flag
  *     @arg TIM_FLAG_CC1OF: TIM Capture Compare 1 overcapture Flag
  *     @arg TIM_FLAG_CC2OF: TIM Capture Compare 2 overcapture Flag
  *     @arg TIM_FLAG_CC3OF: TIM Capture Compare 3 overcapture Flag
  *     @arg TIM_FLAG_CC4OF: TIM Capture Compare 4 overcapture Flag
  * @note
  *   - TIM6 and TIM7 can have only one update flag. 
  *   - TIM9, TIM12 and TIM15 can have only TIM_FLAG_Update, TIM_FLAG_CC1,
  *      TIM_FLAG_CC2 or TIM_FLAG_Trigger. 
  *   - TIM10, TIM11, TIM13, TIM14, TIM16 and TIM17 can have TIM_FLAG_Update or TIM_FLAG_CC1.   
  *   - TIM_FLAG_Break is used only with TIM1, TIM8 and TIM15. 
  *   - TIM_FLAG_COM is used only with TIM1, TIM8, TIM15, TIM16 and TIM17.   
  * @retval None
  */
void TIM_ClearFlag(TIM_TypeDef* TIMx, uint16_t TIM_FLAG)
{  
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_TIM_CLEAR_FLAG(TIM_FLAG));
   
  /* Clear the flags */
  TIMx->SR = (uint16_t)~TIM_FLAG;
}

/**
  * @brief  Clears the TIMx's interrupt pending bits.
  * @param  TIMx: where x can be 1 to 17 to select the TIM peripheral.
  * @param  TIM_IT: specifies the pending bit to clear.
  *   This parameter can be any combination of the following values:
  *     @arg TIM_IT_Update: TIM1 update Interrupt source
  *     @arg TIM_IT_CC1: TIM Capture Compare 1 Interrupt source
  *     @arg TIM_IT_CC2: TIM Capture Compare 2 Interrupt source
  *     @arg TIM_IT_CC3: TIM Capture Compare 3 Interrupt source
  *     @arg TIM_IT_CC4: TIM Capture Compare 4 Interrupt source
  *     @arg TIM_IT_COM: TIM Commutation Interrupt source
  *     @arg TIM_IT_Trigger: TIM Trigger Interrupt source
  *     @arg TIM_IT_Break: TIM Break Interrupt source
  * @note
  *   - TIM6 and TIM7 can generate only an update interrupt.
  *   - TIM9, TIM12 and TIM15 can have only TIM_IT_Update, TIM_IT_CC1,
  *      TIM_IT_CC2 or TIM_IT_Trigger. 
  *   - TIM10, TIM11, TIM13, TIM14, TIM16 and TIM17 can have TIM_IT_Update or TIM_IT_CC1.   
  *   - TIM_IT_Break is used only with TIM1, TIM8 and TIM15. 
  *   - TIM_IT_COM is used only with TIM1, TIM8, TIM15, TIM16 and TIM17.    
  * @retval None
  */
void TIM_ClearITPendingBit(TIM_TypeDef* TIMx, uint16_t TIM_IT)
{
  /* Check the parameters */
  assert_param(IS_TIM_ALL_PERIPH(TIMx));
  assert_param(IS_TIM_IT(TIM_IT));
  /* Clear the IT pending Bit */
  TIMx->SR = (uint16_t)~TIM_IT;
}