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Xc* and Yc* could not be displayed by the simulator
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Yes, because they are variables. You can use signals to make them visible.
My previous comment about d1 to d4 is still valid, I fear.
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Perhaps more important, it's impossible to guess how the code is synthesized from the shown snippets. The various variables used in the design, including d1 to d4 aren't real design objects unless they convert to registers or LE outputs.
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To ask explicitely:
how do you load the values for d1 to d4? --- Quote Start ---
I changed my d# variables from type natural to (unsigned) integer. They represent distances, so cannot be negative.
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May be, but you possibly don't understand the side-effects of implicite type conversion during assignment. I think, this previous suggestion is quite reasonable.
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The safest way around this may be to keep everything in the same type
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Honored Contributor
