Re: FPGA for PCI based servo control board

["alex" <telecomt-at-tht.net>]

This morning I just got the same kind of conformation from our Linux guru.
He said that any network driver should work for RTLinux since this is just a
patch.
Alex
----- Original Message -----
From: ERIC KELLER <eekeller-at-psu.edu>
To: Multiple recipients of list <emc-at-nist.gov>
Sent: Friday, April 04, 2003 9:19 AM
Subject: Re: FPGA for PCI based servo control board


>
>
>
> Using a standard nic for real time communication has been done a number of
times
> now.  Look at RTnet:
> http://www.rts.uni-hannover.de/rtnet/
>
> I don't know where you are going to get a cheaper embedded computer than a
VIA
> elan board
>
>
http://www.newegg.com/app/Showimage.asp?image=13-180-025-04.JPG/13-180-025-0
3.JPG/13-180-025-01.JPG/13-180-025-02.JPG
>
> Eric
>
>
> > >  If the Linux
> > >drivers are indeed not accessible to real-time tasks,
> > >then any ethernet solution will require writing a
> > >real-time compatible NIC driver for every brand of
> > >NIC.  On the other hand, if real-time tasks can
> > >use the existing Linux NIC drivers with a clean
> > >raw packet interface, ethernet looks very good!
> > >
> > No way.  It might be possible to extract a common section of the
> > protocol stack, and use that as the basis for the RT code.  But, it
would
> > almost always require hand massaging, I'm afraid.  Once you go
> > outside the RT code for anything, you are, BY DEFINITION, no
> > longer real-time.  That code could lose control due to a higher priority
> > task, and the message would not get there in time.
> >
> > Jon
> >
> >
> >
> >
>
>