FFT Nan Values; ADC DMA

AKhot.1 · ‎2023-09-01

I am getting nan values while computing the fft. It is mostly for fftOut[0][0]----- fftOut[0][512], after that there are not many nan values. What could be the reason?

Is it that because it running in debug mode and the DMA is on?

Please help with this.

TDK · ‎2023-09-01

You are calling arm_rfft_fast_f32 multiple times (nChirp times) on the same data. That's no good here.

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View solution in original post

TDK · ‎2023-09-01

You are calling arm_rfft_fast_f32 multiple times (nChirp times) on the same data. That's no good here.

If you feel a post has answered your question, please click "Accept as Solution".

AKhot.1 · ‎2023-09-03

So, if I have a 2D array I need not to put the arm_rfft_fast_f32 function in for loop? I thought it would take ftt one by one along the row.