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I've been using arm_rfft_f32 to perform FFT on a sequence of real samples from an ADC.
The signal is a 50 Hz signal and I am performing FFT every 200ms on a set of 2048 samples. The frequency spectrum is distributed in 5 Hz bins and I am getting the correct magnitude in the 10th bin as expected.
The normalized FFT values make sense for sinusoidal inputs but are off mark for square waves ( just an experiment).
Is this a problem that has been observed with this algorithm?
Do let me know if you need me to post any particular results.
