STM32输入捕获

tf001

原子代码这里设置为下降沿捕获TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling);                //CC1P=1 设置为下降沿

而参数不是只有这两种吗
/**
  * @brief  Configures the TIMx channel 1 polarity.
  * @param  TIMx: where x can be 1 to 17 except 6 and 7 to select the TIM peripheral.
  * @param  TIM_OCPolarity: specifies the OC1 Polarity
  *   This parameter can be one of the following values:
  *     @arg TIM_OCPolarity_High: Output Compare active high
  *     @arg TIM_OCPolarity_Low: Output Compare active low
  * @retval None
  */
void TIM_OC1PolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPolarity)
{
  uint16_t tmpccer = 0;
  /* Check the parameters */
  assert_param(IS_TIM_LIST8_PERIPH(TIMx));
  assert_param(IS_TIM_OC_POLARITY(TIM_OCPolarity));
  tmpccer = TIMx->CCER;
  /* Set or Reset the CC1P Bit */
  tmpccer &= (uint16_t)~((uint16_t)TIM_CCER_CC1P);
  tmpccer |= TIM_OCPolarity;
  /* Write to TIMx CCER register */
  TIMx->CCER = tmpccer;
}

正点原子

看看他们的值是否一样！