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amildm's avatar
amildm
Icon for Contributor rankContributor
4 years ago

Connection bi-directional pin to SignalTap

Hi there, How can I connect the bi-directional signal, which in defined as inout, to SignalTap? When I connect this signal to SignalTap, the following error message is issued: "Error(17044): Ill...
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
4 years ago

You can't connect any I/O pin directly to Signal Tap because there is no route from the I/O cell back into the FPGA fabric. You have to tap the register or logic that is feeding or being fed by the pin. In the Signal Tap Node Finder, make sure you are using one of the Signal Tap filters to guarantee that you choose nodes that can be tapped by Signal Tap.