stm32测周法计次N是什么
时间: 2023-08-09 13:07:30 浏览: 50
在STM32测周法中,计次N是指测量信号的周期数。通过捕获信号的两个上升沿,测量之间持续的时间,并使用一个已知的标准频率的计次时钟来驱动计数器。计数器从0开始计数,直到下一个上升沿停止,计数的个数就是N。N/fc就是周期,再取倒数就可以得到频率的公式,fx = fc/N。\[1\]
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