https://devzone.nordicsemi.com/f/nordic-q-a/11518/rtc1-compare1-channel-without-interruptI want to make a rtc calendar.As rtc1 compare channel 0 had been used by app_timer,so I use rtc1 compare channel 1 to generate interrupt very second. But the channel 1 didn&#39;t generate interrupt. Here is the configuration. //channel 0 for app_timeren-USTelligent Community 13Tue, 26 Jan 2016 03:09:19 GMThttps://devzone.nordicsemi.com/thread/43547?ContentTypeID=1Tue, 26 Jan 2016 03:09:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d5b3bd67-ea85-470a-b17b-2901cafd7a98james<p>Thanks Aryan. I figure it out.Because NRF_RTC1-&gt;CC[1] is incremented accumulation. And I didn&#39;t set right value to NRF_RTC1-&gt;CC[1],So it didn&#39;t generate the interrupt.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/43546?ContentTypeID=1Mon, 25 Jan 2016 11:03:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5cfd015c-90f9-4043-bef0-d8f87fa3addaSusheel Nuguru<p>can&#39;t see anything wrong that should stop CC[1] interrupt being fired. The code can be largely optimized, but nothing wrong. Can you attach your project for me to check it on my desk. Which SDK version are you using?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/43544?ContentTypeID=1Mon, 25 Jan 2016 10:07:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cded94ab-d3cc-42ad-9d51-74adc9f4f5c0james<p>I&#39;am afraid of time accuracy.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/43545?ContentTypeID=1Mon, 25 Jan 2016 10:03:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1674701-751e-42d0-bef2-96e72adc2a9eSusheel Nuguru<p>You have to use APP_TIMER library to create a timer that calls your callback every 1 second. I do not see any need to access RTC1 registers directly.</p><div style="clear:both;"></div>