Arduino DUE and FFT Analyzer

Other Hardware 3rd Party Boards
1

Hello,

I want to build an spectrum analyzer.

I have found this link:

I have already ordered the Invensense's ICS43432 I2S microphone.

However I have no Arduino/Genuino Zero at hand, I have an Arduino DUE, which should be also good in terms of performance...

Is it possible?

How do the pins change as given in the sketch for the Zero?

Thanks,

Kr,

Andreas

2

An FFT Library for the DUE:

3

// FFT ------------------------------------------------------------------------------
uint16_t indx_a = flag -1;
uint16_t indx_b = 0;
time_start = micros();
for ( uint16_t i = 0, k = (NWAVE / FFT_SIZE); i < FFT_SIZE; i++ ){
uint16_t windw = Hamming[i * k];
f_r = mult_shft12((inp[indx_a][indx_b++] - dc_offset), windw);

  • }*
  • time_hamng = micros() - time_start;*
  • time_start = micros();*
  • radix.rev_bin( f_r, FFT_SIZE);*
  • time_revbn = micros() - time_start;*
  • time_start = micros();*
  • radix.fft_split_radix_real( f_r, LOG2_FFT);*
  • time_radix = micros() - time_start;*
  • time_start = micros();*
  • radix.gain_Reset( f_r, LOG2_FFT -1);*
  • time_gainr = micros() - time_start;*
  • time_start = micros();*
  • radix.get_Magnit1( f_r, out1);*
  • time_sqrtl = micros() - time_start;*
  • time_start = micros();*
  • radix.get_Magnit2( f_r, out2);*
  • time_sqrtl2 = micros() - time_start;*
    how ı plotting to Magnit1 and magnit2 on serial plotter