I am currently working on an analog vibration sensor I have to recover 5 harmonics with my Stm32wle5jc I would like to know how to do a simple fft without DMA at first then with? because I am a beginner in the field

[YOU Bunleng]

I tried to integrate an example of fft on my existing code and I have a problem "undefined reference to `arm_cfft_radix4_f32'" knowing that I just put the file arm_math.h and after I also tried to put the library DSP and lib arm_cortexM4lf_math.lib and still the same problem

[Louis AUDOLY]

Hello @YOU Bunleng​ and welcome to the community,

I suggest you to refer to these posts of the community that could help you to perform FFT !

https://community.st.com/s/question/0D50X00009XkXj3SAF/getting-started-fft-stm32

And this one :

https://community.st.com/s/question/0D50X0000AYpvLgSQJ/how-to-perform-the-fft-of-a-signal-using-the-stm32f7-discovery-board

I hope this will help you

Regards

Louis