https://devzone.nordicsemi.com/f/nordic-q-a/5796/how-to-count-pulse-with-nrf51822i am very confused about how to count pulse by using nrf51822? I am going to make a heart rate counter, but i don&#39;t know how to config registers to achieve this function. could you please give some sample codes?en-USTelligent Community 13Thu, 26 Mar 2015 03:20:05 GMThttps://devzone.nordicsemi.com/thread/20267?ContentTypeID=1Thu, 26 Mar 2015 03:20:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7f6bb940-0672-490c-a2f2-e4a0b8b03107edceezz<p>Hi,thank you so much,dude. it&#39;s very helpful.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/20266?ContentTypeID=1Wed, 04 Mar 2015 13:30:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5290478c-ace4-421b-804c-bc87b242d04bStefan Birnir Sverrisson<p>Hi</p> <p>I have example here that toggles LED when a signal goes high or low in an input pin. See more explanation at the top of the main file in the example. It was implemented for the nRF51822/nRF51422 Development kit and nRF51 SDK v6.1. No softdevice.</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/frequency_5F00_counter.zip">frequency_counter.zip</a></p> <p>I used the example to measure frequency of an input signal by connecting a logical analyzer to the pin that toggles the LED.</p> <p><strong>Edit 13.3.2015</strong> Thread updated with more complete and more commented example code</p><div style="clear:both;"></div>