75Mhz Spartan3e microblaze

Andreas Hofmann schrieb:

> David Ashley schrieb:
> > u_stadler@yahoo.de wrote:
> >> hi
> >>
> >> well thanks for all the answers so far.
> >> i 'm still trying to get some more speed out of edk.
> >> well as said before i'm not doing anything fancy. just straight forward
> >> stuff and i was wondering what good the ethernet core is if i can't get
> >> it to synthesize with more than 59 MHz. i have also tried to export it
> >> to ise. i mean there must be a trick somewhere or has nobody used
> >> microblaze with ethernet in a spartan 3e yet?
> >> any suggestions would be very helpful
> >>
> >> thanks
> >> urban
> >>
> >
> > I was pretty sure someone recently had just that running
> > on the spartan-3e starter board. Uclinux with networking
> > and I think it was microblaze. Look in the archives, like
> > in the last 1-2 months.
>
> uClinux does run on the Spartan-3e starter board. If the design doesn't
> reach at least 65 MHz you can still use the Ethernet core at 10 MBit -
> 6.5 MHz bus clock is sufficient. Make sure half-/full-duplex and speed
> is set correctly, because auto negotiation doesn't seem to work reliably.
>
> Regards,
> Andreas

actually the ethernetlite uclinux driver was submitted to cvs
yesterday, so its also possible to use the ethernet lite with 100M (and
50MHz system clock)

Antti