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Why FFT HDL Optimized has not output?

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Chen Wu
Chen Wu on 20 Aug 2021
Edited: Bharath Venkataraman on 24 Aug 2021
I copied hdlcoderfftdit.slx from hdl coder examples coming with 2021a. Based on instruction replaced the HDL FFT model in the Simulink model by FFT HDL Optimized model, and set it to Burst Radix 2 (see attached .slx). There is not output from FFT HDL Optimized model.
Anybody can help me?
Thanks
Chen

Answers (1)

Bharath Venkataraman
Bharath Venkataraman on 24 Aug 2021
Edited: Bharath Venkataraman on 24 Aug 2021
It looks like the input valid is not being set to the right pulse width to feed in all the input data for a given frame. Please set the pulse width on the pulse generator to N (instead of N/2). This results in output from the FFT.

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