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Andrew Karpenkov plddesigner at gmail.comHi All! May be it's easy just modify Ettus code for support Tri-Mode Ethernet. I think that it is not so difficult. In that way we can chose Ethernet PHY work mode from host. Also 'wait' feature (PAUSE frames / flow control) available not only for Gigabit Ethernet. Some 10/100 Ethernet Controllers support it (for example, LAN9218). Regards, Andrew Karpenkov 2012/7/27 Robin Coxe <coxe at close-haul.com> > Hi Sylvain. > > On Fri, Jul 27, 2012 at 9:04 AM, Sylvain Munaut <246tnt at gmail.com> wrote: > > Hi, > > > >> The Ettus UHD framework adopted for the umTRX only supports GigE > >> (simple_gemac). A reworked, Wishbone-compliant 10/100 Ethernet MAC > >> is included in the OpenRISC SoC project on Opencores. It has been > >> ported to the Digilent Atlys board, which has a Spartan-6 FPGA. > >> > >> http://www.chokladfabriken.org/projects/orpsoc-atlys > >> > >> I'll begin the port of this Ethernet MAC (a cleaned-up version of the > >> 10/100 core on OpenCores) to the UmTRX and test it on Close-Haul's > >> SP-605 Spartan-6 eval. board. I'm not quite sure how long this task > >> will take, but this feature falls into the > >> "nice-to-have-but-not-urgent" category. > > > > But would it be 10/100/1000 ? or just 10/100 ? > > Just 10/100. User would choose GigE or 10/100 via an IFDEF in the > Verilog. I suppose it would also be possible to multiplex in the > simple_gemac with this 10/100 core and set the mode from the ZPU via > the Wishbone interface. There is a tri-mode Ethernet MAC that Ettus > used to use on the USRP2, but I've never been able to make much sense > of it. If you have suggestions for a better way to add 10/100 > support, I'm definitely interested in hearing them. > > > Also, doesn't UHD make use of the 'wait' feature of Gigabit (i.e. > > PAUSE frames / flow control ) to avoid loosing data ? This doesn't > > exist on 10/100 IIRC. > > > > I'm not all that familiar with UHD, so you probably know better than I > do. Perhaps Thomas could comment? > > -Robin > > -- > Robin Coxe | Close-Haul Communications, Inc. | Boston, MA > +1-617-470-8825 > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/umtrx/attachments/20120727/43bfc10c/attachment.htm>