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FFT Accelerator Usefull or not?

Question asked by Mildocate on Feb 6, 2017
Latest reply on Feb 17, 2017 by Jithul_Janardhanan

Hej All,

 

I am using:

ADSP 21489 EZ Kit Lite, VisualDSP++

CFFTF with 16k points

cfftf(input_r,input_i, temp_r,temp_i, twid_r,twid_i,FFT_SIZE);

Questions:

Is this function using the FFT accelerator?

 

I checked the assembly code and the registers, and I cant see any accelerator used. 

In the manual they call FFTs with more than 512 points "large", so is my 16k FFT super ultra large () and impossible to calculate with the accelerators?

 

best regards

 

Waleri

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