How to split conduit inside Qsys

Question

Hi,

I need to connect a 4-channel transceiver and Stratix-V PCIe Hard IP core to a reconfiguration controller inside Qsys.

That requires 10 channels: 8 from transceiver and 2 from PCIe. Those channels are conduits, and connected using reconfig_to_xcvr and reconfig_from_xcvr busses N*46 and N*70 bit wide.

Is there a way to split a conduit inside Qsys? Current workaround is to bring reconfig_to_xcvr and reconfig_from_xcvr busses outside Qsys, split them into two, and then connect back to Qsys.

That system compiles ok. However, the problem is that Transceiver Toolkit doesn't find reconfiguration controller. I suspect because reconfig_to_xcvr and reconfig_from_xcvr busses are connected that way outside Qsys.

Thanks,

Evgeni

altera_forum · Answer

that sounds like the "proper" way to use conduits, unfortunately. have you looked at Altera's Transceiver Toolkit designs to see how they've connected the reconfig block?

altera_forum · Answer

All Qsys reference designs I've seen are "simple". They only have a single component - either transceiver or PCIe - that is connected to reconfig block. But my design has both.  Thanks, Evgeni

altera_forum · Answer

there are some multi-PHY TT designs here:

http://www.alterawiki.com/wiki/transceiver_toolkit

the conduits are actually connected internally, i didn't think you could do that

at any rate, after opening the multi-PHY design it sounds like you may have the reconfig block setup incorrectly if you are "splitting" the conduits into multiple buses. you should have two separate conduits (two tx/rx pairs), one for the PCIe and one for the "transceivers" (assuming they are all part of one PHY). no manual splitting of the reconfig bus should be necessary

altera_forum · Answer

Those designs have a single multi-channel PHY connected to the reconfig controller with the same conduit.

altera_forum · Answer

i found otherwise:  https://www.alteraforum.com/forum/attachment.php?attachmentid=7656

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How to split conduit inside Qsys

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