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This is simple:
As the error already says: Export them!
To put it quick: if you do not use a port in QSYS, export it to the "Outside". There you can connect it to Ground, Vcc or other logic.
For the powerdown-ports especially you can invert the PCIe_reset_n and use it as Input to powerdown. As I know this is also the way it's done in the Altera design example.
PS: for good digital design: EVERY input has to be connected to something. For example if you don't use some Inputs of an OR-Gate, wire them to ground. If you don't use some Inputs of an AND-Gate, wire them to Vcc. Inputs which are "dangling in the Air" produces unexpected behaviour.
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Hi Steffen,
Thanks for you reply, it's OK now! The next step is to add my own fifo inside Qsys.
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