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RE: [Discuss-gnuradio] Embedded control of USRP
From: |
Lee Patton |
Subject: |
RE: [Discuss-gnuradio] Embedded control of USRP |
Date: |
Thu, 20 Apr 2006 15:53:33 -0400 |
Thanks for the advice, Jim. I appreciate it. I think I found a 1.1 GHz
Pentium M (thanks to Matt) that can be cooled fanless. We're going to
give either that board or a 1 GHz Celeron board from Kontron a try. I
think "outrunning" is the way to go right now.
On Thu, 2006-04-20 at 13:38 -0500, Jim Hanlon wrote:
> I tried to get the USRP talking to an 800MHz VIA fanless industrial control
> computer, with expansion card to get USB 2.0
> performance. I found that gnuradio installed and ran OK, but USRP performance
> consistently exhibited USB overruns and underruns, to
> the point that our evaluation of USRP capabilities was limited by our compute
> power.
>
> I think its nice to be fanless, if you can. And maybe, some clever
> engineering of USB interrupt service routines could improve i/o
> performance. But it is much simpler these days just to outrun the problem
> with a faster CPU clock.
>
> If you are trapped by form factor and "no fan" rules, you may be out of luck.
> Does your architecture allow for (say, USB) expansion
> cards ? If so, you could build one that did block transfers to/from the USB
> bus and your slowish CPU.
> HTH
> Jim Hanlon
>
>
> > -----Original Message-----
> > From: address@hidden
> > [mailto:address@hidden
> > g] On Behalf Of Lee Patton
> > Sent: Tuesday, April 18, 2006 5:19 PM
> > To: Eric Blossom
> > Cc: Discuss gnuradio
> > Subject: Re: [Discuss-gnuradio] Embedded control of USRP
> >
> > On Mon, 2006-04-03 at 11:20 -0700, Eric Blossom wrote:
> > > ... unless you're a glutton for punishment, don't get the Celeron
> > > version, spend the extra bucks and get the Pentium M.
> >
> > Besides the dearth of on-board cache, what are the other
> > drawbacks of a Celeron?
> >
> > To fit the dimensional requirement I was given (5"x5"x~1"),
> > the SBC must be passively cooled. However, I'm not finding a
> > Pentium-M solution that can be passively cooled and meets our
> > availability requirements. I have found a 600 MHz Celeron
> > solution, but has half the L2 cache.
> >
> > In our application, we'll be pulling full throttle from the
> > USRP, maybe FIR filtering, and then pushing back out to USRP.
> > Not too heavy on the signal processing.
> >
> > All advice appreciated.
> >
> > - Lee
> >
> > P.S.
> >
> > Some potential solutions:
> > http://www.gms4sbc.com/P60x_BO.html (can't meet availability)
> > http://www.kontron-emea.com/index.php?id=82&cat=58 (JRex-PM,
> > can only air cool Celeron M 600 MHz)
> >
> >
> >
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > address@hidden
> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
>
>
>
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- Re: [Discuss-gnuradio] Embedded control of USRP, (continued)
- Re: [Discuss-gnuradio] Embedded control of USRP, Eric Blossom, 2006/04/03
- Re: [Discuss-gnuradio] Embedded control of USRP, Clark Pope, 2006/04/03
- Re: [Discuss-gnuradio] Embedded control of USRP, John Gilmore, 2006/04/03
- Re: [Discuss-gnuradio] Embedded control of USRP, Lee Patton, 2006/04/18
- Re: [Discuss-gnuradio] Embedded control of USRP, Eric Blossom, 2006/04/18
- RE: [Discuss-gnuradio] Embedded control of USRP, Jim Hanlon, 2006/04/20
- RE: [Discuss-gnuradio] Embedded control of USRP,
Lee Patton <=
- Re: [Discuss-gnuradio] Embedded control of USRP, Eric Blossom, 2006/04/20
- RE: [Discuss-gnuradio] Embedded control of USRP, Jim Hanlon, 2006/04/20
- Message not available
- Re: [Discuss-gnuradio] Embedded control of USRP, Lee Patton, 2006/04/03
Re: [Discuss-gnuradio] Packet Radio, Eric Blossom, 2006/04/01