[hpsdr] USB Specification

[kd5nwa]

Too quick at the send key.

I will support 12Mb rate but not the 1.5 Mb rate.

At 01:25 PM 1/31/2007, kd5nwa wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>Unless they have messed around with the FX2 firmware the
>specifications of the FX2 chips says it will work with USB 1.0 it
>will not support the 12 Mb rate but not the 1.5 Mb rate.
>
><  URL:http://www-corot.obspm.fr/COROT-ETC/Files/CY7C68013.pdf  >
>
>At 12:54 PM 1/31/2007, Chris Stratton wrote:
> >***** High Performance Software Defined Radio Discussion List *****
> >
> >I would assume the possibility of getting it to work
> >on USB1.1 depends on the "software" implemented more
> >than the hardware built.
> >
> >- you would need to get USB1.1 working with the
> >cypress firmware, for example starting with USRP code.
> >  Presumably you could do that with any board having
> >the cypress chip (USRP, a Xylo, a Digilent NEXYS, etc)
> >without waiting for HPSDR boards
> >
> >- you would need to modify FPGA code to limit the data
> >to USB1.1 plausible rates.  Again, you could probably
> >do something by trying to get the USRP code working at
> >a reduced rate, sending test data.  This may mean
> >throttling your output dynamic range and/or sample
> >rate over the designed intent of the hardware...
> >
> >- and of course you would need to make modifications
> >in the USB interface of client software (power SDR or
> >whatever you plan to use)
> >
> >Chris
> >(the other one... ex-N1IIR)
> >
> >--- Chris Salinas <n0ttw at yahoo.com> wrote:
> >
> > > ***** High Performance Software Defined Radio
> > > Discussion List *****
> > >
> > > > Hi Bill,
> > >
> > >   I'd appreciate it as I don't have the Janus/Ozy
> > > hardware to make that determination. Currently I
> > > don't have PCMIA slots available to put an upgrade
> > > card and there are many High Performance laptops
> > > that only have USB 1.1 available on the cheap.
> > >
> > >   Be nice to know what the limitations it may have
> > > at that specification for FYI. Like I said, if I had
> > > the J/O hardware I would provide the info.
> > >
> > >   Looking forward to the outcome,
> > >   Chris N0TTW
> > >
> > >
> > > Bill Tracey <bill at ewjt.com> wrote:
> > >   Hi Chris,
> > >
> > > Can't say for sure if we'll run on USB 1.1 - have
> > > never tried it. Our
> > > intent is to support USB 2. I'll see if I can find a
> > > USB 1.1 machine
> > > around here and plug it in and see if we can talk to
> > > it, but I don't think
> > > we'll formally support USB 1.1 (as much as anything
> > > is formally supported
> > > with open source code).
> > >
> > > Cheers,
> > >
> > > Bill (kd5tfd)
> > >
> > >
> > >
> > >
> > > ---------------------------------
> > > Now that's room service! Choose from over 150,000
> > > hotels
> > > in 45,000 destinations on Yahoo! Travel to find your
> >fit.> _______________________________________________
> > > HPSDR Discussion List
> > > To post msg: hpsdr at hpsdr.org
> > > Subscription help:
> > > http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> > > HPSDR web page: http://hpsdr.org
> > > Archives:
> >http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> >
> >
> >
> >
> >___________________________________________________________________ 
> _________________
> >Need a quick answer? Get one in minutes from people who know.
> >Ask your question on www.Answers.yahoo.com
> >_______________________________________________
> >HPSDR Discussion List
> >To post msg: hpsdr at hpsdr.org
> >Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> >HPSDR web page: http://hpsdr.org
> >Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
>
>
>Cecil Bayona
>KD5NWA
>www.qrpradio.com www.hpsdr.com
>
>'Never argue with an idiot. They drag you down to their level then
>beat you with experience.'
>
>_______________________________________________
>HPSDR Discussion List
>To post msg: hpsdr at hpsdr.org
>Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
>HPSDR web page: http://hpsdr.org
>Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/


Cecil Bayona
KD5NWA
www.qrpradio.com

'Never argue with an idiot. They drag you down to their level then 
beat you with experience.'  


 1170284687.0