https://devzone.nordicsemi.com/f/nordic-q-a/8052/sine-wave-generation-with-nrf51822-without-softdeviceHi, I am trying to generate a 128Hz sine wave using the nrf_pwm library . First I tried this with SD110 enabled but ran into some problems that turned out to be a known issue with the nrf51 chip. So I tried generating my sine wave with the nrf_pwmen-USTelligent Community 13Sat, 11 Jul 2015 15:46:49 GMThttps://devzone.nordicsemi.com/thread/28872?ContentTypeID=1Sat, 11 Jul 2015 15:46:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e9746919-da37-4f39-b843-52e74022797agammarui<p>Hi John, thanks for your reply!</p> <p>I have given up on running this code with SD. I will run it without SD for now and hope that nordic fixes this problem to the nrf52. I thought that the problem was caused by the SD and that my approach would work if SD is not used. Is nordic&#39;s hardware really that glitchy that generation of a sine wave requires your workaround even without SD?</p> <p>Thanks for the advice on time consuming calculations, I have moved that code to after the cc value update.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/28871?ContentTypeID=1Wed, 08 Jul 2015 07:38:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:13fc3d45-5380-4840-99d8-46c22dc52a20JohnBrown<p>Is it your ultimate goal to run this code while the SD is running? If so, good luck.</p> <p>If you can live with no SD running, then I have discussed this in other threads. The problem is that there is no double buffering of the CC values, but my solution is to only use a subset of the maximum duty cycle, which means you cam update the CC value in a &quot;dead period&quot;. The other thing to note is that you are making some probably time-consuming calculations during the IRQ before updating the CC, you might be better off to first write the CC with a value calculated in the previous IRQ.</p><div style="clear:both;"></div>