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15 Sep 2024
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@libera_dormito:catircservices.orgdormito I'm trying to use the DCU on an ECP5, but next-pnr says that it "must be constrained to a Bel". Which makes sense, however I'm not seeing a way to specify that constraint. Anyone familair with using the DCU (serdes) on an ECP5? 16:03:24
@libera_tnt:catircservices.orgtnt (* BEL="" *) attribute IIRC 16:04:56
@libera_dormito:catircservices.orgdormito oh hmmm. Thanks. Must admit I'm really not familiar with "(* *)". But that gives me something to look up. much appreciated 16:07:16
@libera_tnt:catircservices.orgtnt It's how to mark attribute on the instance in verilog 16:07:42
@libera_dormito:catircservices.orgdormito tnt: thanks a lot got a bit stream out :). I used nextpnr-ecp5 --gui to lookup the Bel name. Is there a more standard way to lookup bel's given a type? 16:17:01
@libera_tnt:catircservices.orgtnt dormito: not that I know of, for special cells that's how I did it too. 16:42:47
@libera_dormito:catircservices.orgdormitook, thanks17:12:08

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