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Altera_Forum

Honored Contributor I

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01-21-2015
02:35 PM

974 Views

FFT megawizard stimulation

Hi !

I am new to megacore I generated the FFT core in vhdl. But I couldnt to run the stimulation in modelsim. I attached the tb_fft.vhd fft.vhd and fft.vho file to the project in modelsim.Should I do more? please help.Link Copied

11 Replies

Altera_Forum

Honored Contributor I

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01-21-2015
02:43 PM

19 Views

Altera_Forum

Honored Contributor I

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01-21-2015
03:19 PM

19 Views

I cant get the outputs. The outputs are high impidance

Altera_Forum

Honored Contributor I

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01-21-2015
03:36 PM

19 Views

So it simulates but doesn't produce an output? The transcript window will show you any errors or warnings - most likely that a component is unbound and therefore it's not actually being simulated, if that's the case have a look and see where the component it can't find is.

If you're still having trouble, try following the instructions listed as "Simulating in Third-Party Simulation Tools Using NativeLink" in the FFT user guide here: http://www.altera.co.uk/literature/ug/ug_fft.pdf
Altera_Forum

Honored Contributor I

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01-21-2015
03:39 PM

19 Views

Altera_Forum

Honored Contributor I

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01-21-2015
03:46 PM

19 Views

I tried it locally by running the following commands:

vlib work vcom fft.vho -work work vcom fft_tb.vhd -work work vsim fft_tb log -r /* add wave sim:fft_tb/fft_inst/* run -all and it worked for me in version 13.1 and modelsim AE
Altera_Forum

Honored Contributor I

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01-22-2015
09:06 AM

19 Views

I solved the problem thanks a lot.

The sink_real txt file was missing.
Altera_Forum

Honored Contributor I

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01-22-2015
09:20 AM

19 Views

Is it possible to vary the input size ?

For example for 8-fft megawizard creates 4 frame ( 32 length array), I want to apply it 8 frame ( 64 length array). Could I do that by adding the frames to inputs ( sink_real and sink_imag) ?
Altera_Forum

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12-28-2015
06:28 AM

19 Views

hi feradiskaras , i am also working on FFT , but my code gives so many errors,

can you just share your code, i am working on my FYP. thanks..help will be appreciated..
Altera_Forum

Honored Contributor I

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12-29-2015
12:43 PM

19 Views

if you specify what the errors, I can help you.

Do you use the megawizard plug-in fft? The code is generated by magwizard. I just modified it for my inputs. --- Quote Start --- hi feradiskaras , i am also working on FFT , but my code gives so many errors, can you just share your code, i am working on my FYP. thanks..help will be appreciated.. --- Quote End ---
Altera_Forum

Honored Contributor I

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12-29-2015
01:24 PM

19 Views

i am unable to use megawizard plug_in FFT, i dont know but quartus show only basic libraries are installed.

dont know how to instal dsp library so that i can use fft..
Altera_Forum

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12-29-2015
03:05 PM

19 Views

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