Plan for 10/100 Ethernet support for umTRX

Sylvain Munaut 246tnt at gmail.com
Fri Jul 27 13:04:49 UTC 2012


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 ?

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.

Cheers,

    Sylvain




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