it seems that the problem is when I use more than 8 eps.
but i don't find any limitation on this.

‫בתאריך יום ד׳, 28 בינו׳ 2026 ב-10:34 מאת ‪Daniel Ozer‬‏ <‪
[email protected]‬‏>:‬

> Hello everyone,
> I need to create a bitfile for the X440 usrp (based on the X4_200 variant,
> with uhd 4.9.0.0) which takes each rx port split it 2^n ports, each port go
> to a ddc then to the eps.
> While i managed to accomplish it when the number of the eps is equal/lower
> than 8, each time when there is more than 8 eps i successfully passed the
> creation of the bitfile but when trying to load (using the
> uhd_image_loader) it on the usrp i get the following error at the end:
>
> [ERROR] [RFNOC::GRAPH] Caught exception while initializing graph:
> RfnocError: Specified destination address is unreachable: 1:0
> Error: RuntimeError: Failure to create rfnoc_graph
>
> I tried many variation (see the attached yml) -which include adding to all
> eps True on the CTRL option, i tried to use only 2 eps with 8 in_ports and
> more.
>
> What may cause the problem?
> it seems in the documation there is no limit for the number of the eps (or
> ddc,splitter) as long as I managed to implement it successfully on the fpga.
>
> thank you all in advance.
>
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