/** * @brief Gets the TIMx Input Capture 1 value. * @param TIMx: where x can be 1 to 17 except 6 and 7 to select the TIM peripheral. * @retval Capture Compare 1 Register value. */ uint16_t TIM_GetCapture1(TIM_TypeDef* TIMx) { /* Check the parameters */ assert_param(IS_TIM_LIST8_PERIPH(TIMx)); /* Get the Capture 1 Register value */ return TIMx->CCR1; }
/** * @brief Gets the TIMx Counter value. * @param TIMx: where x can be 1 to 17 to select the TIM peripheral. * @retval Counter Register value. */ uint16_t TIM_GetCounter(TIM_TypeDef* TIMx) { /* Check the parameters */ assert_param(IS_TIM_ALL_PERIPH(TIMx)); /* Get the Counter Register value */ return TIMx->CNT; }
當捕獲成功時,TIM_GetCapture1()和TIM_GetCounter()得到的值一樣嗎?
TIM_GetCapture1對應寄存器CRR1,TIM_GetCounter對應寄存器CNT
答:
看你處理的速度了,
正常來說TIM_GetCapture1才是最准確的.完全硬件級別的保存.
捕獲/比較寄存器 1: TIMx_CCR1,該寄存器用來存儲捕獲發生時, TIMx_CNT的值;
我們從 TIMx_CCR1 就可以讀出通道 1 捕獲發生時刻的 TIMx_CNT 值