title: measuring time between two rising edges in beaglebone
body: <p>I am reading sensor output as square wave(0-5 volt) via oscilloscope. Now I want to measure frequency of one period with <strong>Beaglebone</strong>. So I should measure the time between two <strong>rising edge</strong>s. However, I don't have any experience with working Beaglebone. Can you give some advices or sample codes about measuring time between rising edges?</p>