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Modelsim | Help with apply-wave

DonCajone
New Contributor I
504 Views

i have a little problem with my manager input ( W ) i can't find TIME PERIOD for my project ( For W )

DonCajone_0-1666949638226.png

( On photo W have constant 1, but in project it have change beatwen 0 and 1 )

So, if someone know how calculate Time period for W, please explaine how u found it 

 

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8 Replies
sstrell
Honored Contributor III
453 Views

Without seeing the design or some code, there's no way to know.  Can you provide that and more details on what you're expecting?

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DonCajone11
Beginner
414 Views

Link on project click

 

screenshot:

DonCajone11_0-1667245584163.png

 

and screenshot of Lab3_11( where idk which time set to W

DonCajone11_1-1667245638292.png

DonCajone11_2-1667245676966.png

 

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Ash_R_Intel
Employee
428 Views

Hi,

What frequency are you driving the signal? Is it from testbench or forcing it in waveform?


Regards


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DonCajone11
Beginner
413 Views

i dont understand ur question :c, but its i a little bit stuoid :3, i try explain what i want:

 

I have pin W, its enable pin for project Lab3_11, in ModelSim i dont know whitch time i have set for get those lines ( on screenshot ) , so my main problem its which time set for pin W in ModelSim to get those lines ( YA ( my MUX ) have be same with YB( common MUX in Quartus ), but enable pin W ruin me evrething :c )

 

DonCajone11_3-1667246134107.png

its when i set W constant = 1

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sstrell
Honored Contributor III
412 Views

W is coming from an input pin so its period/frequency would depend on whatever is driving that input from the board, outside the FPGA.  There's no info here to determine that.

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Ash_R_Intel
Employee
386 Views

Hi,

The issue is still not clear to me. Input W looks like a static input and not a clock. What do you mean when you asked TIME PERIOD for W, in your first post?

As I understand from the block diagrams that you pasted, input W has no effect on output YB. Its acts as enable for output YA only. If W = 1, both the outputs YA and YB behave as a mux. But if W = 0, YA will probably always be 0.

 

Regards

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DonCajone
New Contributor I
383 Views
Yep, input W - static 1, but i set static just for example, in project i have to set clock/counter, change between 1and0, main problem: I don't know how/which time set( in apply wave )

W its like enable input

And yep, its 2 mux, YB standart mux, which in quartus, YA its own mux
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Ash_R_Intel
Employee
351 Views

Hi,

Your query is application specific, so it depends upon how frequently the higher-level module is going to change the input.

I think for testing purpose, you can just provide any frequency. The outputs should change accordingly.


Regards


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