[ECOS] Re: MMI without PHY

Grant Edwards grant.b.edwards@gmail.com
Tue Nov 17 16:27:00 GMT 2015

On 2015-11-17, Privat <PicassoCT@gmx.de> wrote:

> on getting a Ecos conrolled ECU to communicate with a counterpart,
> using only the ethernet 302.ab MMI layer of Ecos with no phy present.
> So whats the plan?
> The plan, is to provide the whole os with a stump, creating the happy
> illusion of a ever present connection.  Has anyone done this
> previously?

Sure.  It's done all the time in embedded devices that include an
Ethernet switch.  One port on the switch has a "reverse" MII interface
that connects directly the the microcontroller's MII interface.

>If so, can you hook me up with a link to a repo/sampleconfig, where
>this was done?

Not really, all the examples I know of are proprietary.

Just take out whatever code you have that's trying to talk to a PHY,
then configure the microcontroller's MAC to 100M Full-Duplex (or
whatever you want for the link), and you're done.

Grant Edwards               grant.b.edwards        Yow! Is my fallout shelter
                                  at               termite proof?

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