https://devzone.nordicsemi.com/f/nordic-q-a/82096/how-to-run-cmsis-dsp-on-nrf52840Hi there, I&#39;d like to make some FIR or IIR filter on my nRF52840 DK. I guess I&#39;m supposed to: 1) Provide .a file into SES project&#39;s tree (or as Additional Input File): 2) Provide .h file(s). I used to provide just &quot;arm_math.h&quot; for STM32 projects, buten-USTelligent Community 13Fri, 26 Nov 2021 13:06:38 GMThttps://devzone.nordicsemi.com/thread/340912?ContentTypeID=1Fri, 26 Nov 2021 13:06:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6155b7ab-ebdc-459f-8519-0da195d8ead3Einar Thorsrud<p>Hi,</p> <p>This should not be any problem, and you can use the ARM math library with or without the SoftDevice. You can see&nbsp;how it is done in the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/fpu_fft_example.html">FPU FFT Example</a>&nbsp;(which does essentially what you have described).</p> <p>Perhaps it is a good idea to use this as reference, and copy the relevant parts to your project. Then you can verify that it still works and gives the expected result in your project before you modify it to your needs.</p><div style="clear:both;"></div>