how to i use external interrupt ?https://devzone.nordicsemi.com/f/nordic-q-a/21512/how-to-i-use-external-interruptHi, i am new in nrf51822. i want to make a pin as a external interrupt pin, whenever it get high to low pulse it will call in ISR. here i am unknown how to write an ISR here. please give me suggestion thanksen-USTelligent Community 13Fri, 21 Apr 2017 06:09:19 GMTRE: how to i use external interrupt ?https://devzone.nordicsemi.com/thread/84443?ContentTypeID=1Fri, 21 Apr 2017 06:09:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:77925a5f-2412-4024-b8c2-75f4e445c81cmr_sev<p>use gpioe library</p><div style="clear:both;"></div>RE: how to i use external interrupt ?https://devzone.nordicsemi.com/thread/84442?ContentTypeID=1Fri, 21 Apr 2017 05:59:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c2119e7-488a-4b6f-ba6b-e97ea73e1968Daniel Sullivan<p>Have a look at the examples/peripheral/pin_change_int example in the SDK folder. That shows setting a PIN as an interupt and running a function based on that. Only change you&#39;ll need is to change:</p> <p>GPIOTE_CONFIG_IN_SENSE_TOGGLE to GPIOTE_CONFIG_IN_SENSE_HITOLO</p><div style="clear:both;"></div>