I am using BF548 evaluation kit and AD7357 interfaced with it.
I want to calculate FFT of the sine wave input
I tried using rfft_fr16 function. Result shows correct fundamental frquency but all the components are either 0,1,2 (Magnitude=0/1/2) after 7th order component.
Because of which when I convert it into % all the values are either 0.625, 1.25 or 2.5
I want the resolution in % as 0.01.
I also tried complex fft function but it is also not giving proper results
Questions: 1) what can i do to change the resolution?
2) Why am I getting all the samples as 0/1/2?
Kindly suggest me on what changes should I make?