请问这个TIM5CH1_CAPTURE_STA变量是怎么得到赋值的？

liuhuayi · 发表于 2020-3-9 16:37:54

u8  TIM5CH1_CAPTURE_STA=0;
u32 TIM5CH1_CAPTURE_VAL;

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=0XFFFFFFFF;
}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;
TIM5CH1_CAPTURE_STA|=0X40;
TIM_Cmd(TIM5,DISABLE );
     TIM_SetCounter(TIM5,0);
     TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling);
TIM_Cmd(TIM5,ENABLE );
}
}
}
TIM_ClearITPendingBit(TIM5, TIM_IT_CC1|TIM_IT_Update);
}