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Altera_Forum's avatar
Altera_Forum
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11 years ago

PCIe Hard IP returning stale data for Cyclone IV

I have recently ported a PCIe endpoint design working on Arria V to Cyclone IV , ( Transciever Starter Kit ) . I need to go back but don't believe I see the problem on Arria V which is a very ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

All this gets resolved if the RC and the EP card are reset each time I believe.

I don't have root cause but am monitoring it.

It is possibly in emulation to reset the RC and maybe not all the EP state. I think the PCIe slot reset propagates to the Avalon MM fabric and internal IP but need to check.

So I believe this is related to resetting the RC without a corresponding full reset of the FPGA EP.