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Problems about sink_ready and sink_valid in FFT IPCore

Altera_Forum
Honored Contributor II
‎01-07-2010 07:28 AM
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Hi, 

I'm trying to test FFT mega core v8.1 with ModelSim and meeting some problems about the signals.When using The FFT_tb.v generated by FFT MegaCore,the results are correct.But when using the tb file written by me in which I do not assert the sink_valid right after assert the reset_n(sink_valid asserted serval cycles after sink_ready asserted),the results are not completely correct.But I think it is not necessary to assert sink_valid at the moment sink_ready asserted. 

Does anyone can tell me how to deal with these problems? 

Thank you!
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Altera_Forum
Honored Contributor II
‎01-07-2010 08:25 AM
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The problem has been resovled just a moment ago.The resolution is to deassert sink_sop before sink_valid is asserted.

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