Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
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How to rectify This error?

Anonymous
Not applicable
980 Views

I am designing 4-bit comparator using 2-bit comparator and made a circuit .

After running RTL stimulation Error occurs.

I don't know why this error occurs as most of the output is correct but few are wrong.

I attached the screenshot of 2-bit comparator  code and the circuit diagram of 4-bit if you find something wrong then please guide me regarding that issue.

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4 Replies
sstrell
Honored Contributor III
971 Views

You have a typo in your equals logic for the 2-bit comparator.  The first term is using ~A1 when it should be ~B1.

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Anonymous
Not applicable
961 Views
Can you please rephrase and explain what you said?
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sstrell
Honored Contributor III
958 Views

Not sure how to rephrase it any clearer.  Your Equal logic assignment should be:

assign Equal = (~A1)&(~A0)&(~B1)&(~B0)....etc.

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Anonymous
Not applicable
929 Views

I made correction in code as you said and now more output are correct but 2-3 are wrong still.

Please Guide me.

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