STM32 TIM input captures bilateral edge detection tim_icpolarity_bothedge

STM32 TIM input captures bilateral edge detection Tim_icpolarity_bothedge

Come directly, first on the code:

Initialize TIM1 input capture parameter
Tim1_icinitstructure.tim_channel = tim_channel_1;//cc1s=01     Select input IC1 map to TI1 tim1_
icinitstructure.tim_icpolarity = Tim_icpolarity_bothedge;  
Tim1_icinitstructure.tim_icselection = Tim_icselection_directti; Map to TI1 on
tim1_icinitstructure.tim_icprescaler = TIM_ICPSC_DIV1;   Configuration input divider, non-crossover 
tim1_icinitstructure.tim_icfilter = 0x00;//ic1f=0000 configuration input filter not filtered
tim_icinit (TIM1, &tim1_ Icinitstructure);

First of all, this code is not realized in the bilateral input capture, the specific reason is that St this piece did not do well, Tim_icpolarity_bothedge no use

Thanks to the great God in this post, the problem is solved.
Http://www.openedv.com/thread-12644-1-1.html

As described in the post, the code:

  /********************* enable bilateral edge detection ************************/
   //http://www.openedv.com/thread-12644-1-1.html
   Tim1->ccer &= (uint16_t) ~ ((uint16_t) tim_ccer_cc1e);
   TIM1->CCMR1 |= 0x03;
   TIM1->SMCR |= (1 << 6);
   TIM1->SMCR &= ~ ((1 << 5) | (1 << 4));
   Tim1->ccer |= ((uint16_t) tim_ccer_cc1e);
   /********************* enable bilateral edge detection ************************/