Re: [Discuss-gnuradio] Delta 44

[James Cooley]

What is the story with this 0xf0f0f0f[02] overload stuff? I've been 
doing the same, subbing in 0 and 2 as others have been mentioning. 
However, unless I'm missing something, I am using the latest code. I 
just upgraded to python2.4, manually removed all the 2.3 site-packages, 
rebuilt from scratch.

Are you talking about picking up a new usrp firmware? (I think I haven't 
done that in a while)

-jamie


n4hy wrote:

> The performance impact was almost negligible.  I am still having 
> trouble with the fully updated
> usrp/gr-usrp code at home.  tvrx_wfm_rcv.py complains bitterly about 
> 0xf0f0f0f[02]
> yielding an overload it hates.  Here at work, in an older version of 
> this code,  I just subbed
> in 0 and 2 for these numbers and everything seemed to work but this 
> "trick" does not work
> on the new stuff at home.
>
> Guidance needed.
>
> Bob
>
>
>
>
> Eric Blossom wrote:
>
> > On Fri, May 27, 2005 at 05:48:18AM -0600, Bob McGwier N4HY wrote:
> >
> >  
> >
> > > Even though the Delta 44 has only four inputs and four outputs (all
> > > balanced monoaural), it reports twelve through ALSA to jack.  I can
> > > tell this is happening since dial_tone.py and tvrx_wfm_rcv.py both
> > > blow up with complaints about the number of sinks.  multi_tone.py
> > > works perfectly since it loads stuff up for all gazoutas.
> > >
> > > Has anyone done a general work around for this?
> > >   
> >
> >
> > Try using plughw:0,0 instead of hw:0,0 as the pcm device (second arg
> > to audio.source and audio.sink.  plughw:0,0 should send something (not
> > sure what) to all i/os.  Not sure of the performance impact.  A bit of
> > measuring with oprofile will reveal all.
> >
> > It sounds like a fix for the Delta-44 ALSA driver is in order too.
> > This assumes that the driver can tell the difference between a
> > Delta-44 and other boards with the same chip set.
> >
> > You might want to post this question to the JACK or ALSA mailing lists.
> >
> > Eric
> >
> >
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> >
> >  
>
>
>
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