如何理解输入捕获中的中断函数和下降沿的捕获

lokhin · 发表于 2019-3-15 22:55:27

void TIM5_IRQHandler(void)
{

if((TIM5CH1_CAPTURE_STA&0X80)==0)
{
if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)

{
if(TIM5CH1_CAPTURE_STA&0X40)//
{
if((TIM5CH1_CAPTURE_STA&0X3F)==0X3F)
{
TIM5CH1_CAPTURE_STA|=0X80;
TIM5CH1_CAPTURE_VAL=0XFFFF;
}else TIM5CH1_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM5, TIM_IT_CC1) != RESET)//
{
if(TIM5CH1_CAPTURE_STA&0X40)
{
TIM5CH1_CAPTURE_STA|=0X80;
TIM5CH1_CAPTURE_VAL=TIM_GetCapture1(TIM5);
   TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Rising);
}else
{
TIM5CH1_CAPTURE_STA=0;
TIM5CH1_CAPTURE_VAL=0;
     TIM_SetCounter(TIM5,0);
TIM5CH1_CAPTURE_STA|=0X40;
   TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling);
}
}
}

TIM_ClearITPendingBit(TIM5, TIM_IT_CC1|TIM_IT_Update);
}