https://devzone.nordicsemi.com/f/nordic-q-a/55188/math-fft-fpuHello! Nice to ask a question here！ I used arm_cortexM4lf_math.lib in NRF52832 software, and used the function arm_cfft_radix2_f32 function. I want to know that for the input with 512 real number points and 512 imaginary number points , this functionen-USTelligent Community 13Fri, 06 Dec 2019 02:43:57 GMThttps://devzone.nordicsemi.com/thread/224055?ContentTypeID=1Fri, 06 Dec 2019 02:43:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e8a009d-6cf5-4642-a872-d92782cf445eDJhentiaLoli<p>Thx for your reply~</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/223635?ContentTypeID=1Wed, 04 Dec 2019 14:14:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:16ceb615-2196-41d0-842a-e020f82e52c6Amanda Hsieh<p>Hi,&nbsp;</p> <p></p> <p>The&nbsp;<a href="https://www.keil.com/pack/doc/CMSIS/DSP/html/group__ComplexFFT.html#ga9fadd650b802f612ae558ddaab789a6d">arm_cfft_radix2_f32</a>&nbsp;function is developed by ARM. I would suggest you <b><a href="http://www.keil.com/support/request.asp?P=&amp;V=&amp;S=">Contact ARM Technical Support</a>&nbsp;</b>to get the precise answers.&nbsp;</p> <p></p> <p>-Amanda H.</p><div style="clear:both;"></div>