struct -> how to add to SignalTap ?

probably I've misled you ... the right-side signals (declared as logic or wire) do appear in the search, but the left-side signals (declared as struct) do not appear...

In my opinion, the SignalTap is built to tap nets, not signals defined in HDL. So, if two signals are assigned to the same net, the Analyze & Elaborate stage will eliminate one without leaving a choice to SignalTap at all...

That's not what Analyze & Elaborate does. That first stage of the compiler simply checks all the code and builds the project hierarchy. No optimization has been performed yet. When you tap a pre-synthesis signal, the filter is showing what is tappable in the HDL code itself before any optimizations.

In fact, the Analyze & Elaborate stage eliminates (throws out) the signals which drive nothing... So you cannot say there is no an optimization in this stage.

OK, you got me there

But still, like I said, the filter shows what's tappable in your code.

Thank you for acknowledge the solution provided.

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Richard Tan

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