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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

PCIe IP with 2 VCs, Vendor ID only on VC0?

Hi All,

I have a designed an SOC with a PCIe RootPort. It works fine. I just changed the PCIe IP to a 2 VC version.

As a simple test of the second VC I tried to read the vendor's ID but I get no response from the IP. It responds

fine on the first VC. Is that the way it supposed to work? I get the same results in simulation.

Any ideas?

Thanks,

S.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    We have been working on a similar concept and found that tx credits are not issued by Altera's IP for second VC. Hence, IP is not ready to receive tlp's on second VC.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    VC1 is not supported. The PCIe core only supports 1 Virtual Channel (VC0).