基于AVR单片机捕捉功能实现高精度的周期测量.原理就是将被测信号作为ICP1的输入,被测信号的上升(下降)沿作为输入捕捉的触发信号.捕捉事件发生的时间印记由硬件自动

同步复制到ICR1中,因此所得到的周期值是非常精确的.

-AVR-based single-chip implementation capture high-precision measurement of the cycle. The principle is the measured signal as the input ICP1, the increase in the measured signal (down) along the trigger as an input capture signal. Capture the incident occurred at a time mark by the hardware automatically Copy to ICR1 synchronization, so the cycle value obtained is very precise.