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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Quartus II is not optimizing my synthesized circuit.

Altera_Forum
Honored Contributor II
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Hello everybody!  

I'm Eduardo, from Venezuela. I'm an EE student and I'm new to this forum :) 

 

I have what you may call a noob's question, but I can't get Quartus II to reduce the size of the synthesized gate-logic circuit. I know that the function I'm implementing (a simple boolean function) can be reduced at gate level, but when I click on "RTL Viewer" on Tools, there is actually no simplification :/ And I have tried almost anything to achieve it, but still no success.  

 

This is what I get on the RTL Viewer: 

http://www.alteraforum.com/forum/attachment.php?attachmentid=11172&stc=1  

 

What I should get (took from textbook) 

http://www.alteraforum.com/forum/attachment.php?attachmentid=11171&stc=1  

 

I performed a wave vectors simulation of both the code I used and the code they use in the textbook and they match, so the code is not the problem. 

 

 

I really hope you can help me and later I can help you too as long as I keep learning :) 

Thanks in advance!  

 

=)
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Altera_Forum
Honored Contributor II
563 Views

The RTL Viewer will show you basically what you coded. It's the map view that will show you the reduced circuit.

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Altera_Forum
Honored Contributor II
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Thanks for answering, Tricky, but all I can see is a "black box" with input and output pins on the Technology Map Viewer :/ 

 

PD: I accidentally deleted the original post when trying to remove an unused thumbnail xD sorry.
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Altera_Forum
Honored Contributor II
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You won't get the "optimized" version anyway because an FPGA doesn't use gates internally, it uses look-up-tables. Your logic can be synthesized in a single LUT cell and that is probably what the technology map viewer is showing you.

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Altera_Forum
Honored Contributor II
563 Views

Oh, thanks a lot Daixiwen, I understand now :D

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