Technology map viewer

The following pictures shows part of the result from "technology map viewer (post-mapping)" for a simple FSM design. As I double click on the right LOGIC_CELL_COMB, nothing is shown. I expected to see in the internal structure (gates). Should I do something else?

mahmood.n said:

The following pictures shows part of the result from "technology map viewer (post-mapping)" for a simple FSM design. As I double click on the right LOGIC_CELL_COMB, nothing is shown. I expected to see in the internal structure (gates). Should I do something else?
View attachment 159416

Click to expand...

Normally, the farthest you can go with technology map viewer (post-mapping) is the macrocell. If you want to see the logic gates, you will have to use the RTL viewer.

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Which software are you using?

It is Quartus.
The RTL diagram is shown below. The FSM is shown as the current_state block. When I double click on the block, I see the FSM and not the flip flops.
So, the map viewer shows the flip flops while not showing combinational logic. On the other hand, the RTL is the reverse.

Okay, that is Quartus Prime.

mahmood.n said:

It is Quartus.
The RTL diagram is shown below. The FSM is shown as the current_state block. When I double click on the block, I see the FSM and not the flip flops.
So, the map viewer shows the flip flops while not showing combinational logic. On the other hand, the RTL is the reverse.

Click to expand...

Yes, the technology map viewer shows the flip-flops. It also shows the combinational logic cell, but as a unit cell. It doesn't get to gate level. If you look at the netlist navigator, as you expand down, you will see ports, registers and atoms. These are basically ports, flip-flop registers and combinational logic cells, respectively. They are the farthest you can go with Quartus Prime.

With RTL viewer on Quartus Prime, you can only expand down to multiplexers, operators and registers (flip flops), and even logic gates where you explicitly used OR, AND,...operators.

It has a lot to do with coding style actually.

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Can you post your code here?

I expected to see in the internal structure (gates). Should I do something else?

Click to expand...

To see the logic, just click on the properties in LOGIC_CELL_COMB context menu.

FvM said:

To see the logic, just click on the properties in LOGIC_CELL_COMB context menu.

View attachment 159420

Click to expand...

I do not know about this. I am not with my PC at this time. Please can one post a confirmation screenshot for the purpose of learning? I'll check later but a screenshot will be well appreciated.

The code is attached.

To see the logic, just click on the properties in LOGIC_CELL_COMB context menu.

Click to expand...

Right. Thank you.
I also tried Quartus II 12 and by double clicking on the component, I shows the logic.
The problem is solved.

mahmood.n said:

The code is attached.

Right. Thank you.
I also tried Quartus II 12 and by double clicking on the component, I shows the logic.
The problem is solved.

Click to expand...

Oh! Wow! Thanks. Good to know this. Such an ample info. Thanks FvM.