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Raghunath
Visitor
Visitor
557 Views
Registered: ‎04-08-2020

FFT IP core hanging after sometime

Hi, we have used fft ip in our design initial for some sample the fft is worki fine.

after some time fft is not giving any output or requesting any data what may be the wrong.

my configurations: 32 point fft.

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5 Replies
joancab
Advisor
Advisor
541 Views
Registered: ‎05-11-2015

 

Is it the FFT itself or the DMA you may use to feed data to it?

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Raghunath
Visitor
Visitor
539 Views
Registered: ‎04-08-2020

RFADC ip core output directly feed the data to FFT ip

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joancab
Advisor
Advisor
524 Views
Registered: ‎05-11-2015

Have you tried with an ILA? Is there a chance of it hanging because of NaN results?

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dgisselq
Scholar
Scholar
453 Views
Registered: ‎05-21-2015

@Raghunath ,

There are a couple of reasons why the FFT IP core might hang: 1) Violating the AXI stream protocol, 2) Holding M_AXIS_TREADY low, and 3) Not setting TLAST at the end of an FFT.  This last might happen if you lose count of values going in and out of the FFT

Dan

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Raghunath
Visitor
Visitor
405 Views
Registered: ‎04-08-2020

thanks its the axi interface problem the issue resolved now

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