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Altera_Forum
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9 years ago

Routing USB through FPGA

Hi, I'm having some difficulties routing USB through my DE-1 FPGA board. The goal is to make the FPGA chip look like a bare wire to an USB throughput. The thought was to have it perform the han...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Well, tests like this: 

if (InForw > 1'bZ)

make absolutely no sense, either in pure simulation or especially in compiled FPGA logic.

Your input value (single ended) will be either 1'b0 or 1'b1. It will never be 1'bZ (or 1'bX) in the real world.

You need to reconsider what you are trying to do.