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schlosberg
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Registered: ‎04-12-2021

Wrong fft results using AR# 58582 Example Design

Hello,

I have used the AR# 58582 Example Design - Zynq-based FFT co-processor using the AXI DMA from this link-  https://www.xilinx.com/support/answers/58582.html

schlosberg_0-1618215530520.png

We haven't succeeded to load the design through the tcl console. So we tried to build the design like the one in the bd_fft.bmp picture attached.

Also we have used the MATLAB code example attached for generating a stim buffer (stim.h file for the SDK) and it also shows how the signal should be presented in the frequency domain:

schlosberg_1-1618216408696.png

After running the sdk code in the folder, we took the result buffer samples and presented it:

schlosberg_2-1618216736971.png

 

 
schlosberg_3-1618216772024.png
 
It can be seen that the current result are different from the expected.
Can someone give me any clue why we haven't got it right? Or alternatively give us instruction on how to the detect the problem step by step?
Thank you in advance. 
 

 

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