Re: [Discuss-gnuradio] Source block for the funcube pro plus

[Volker Schroer]

Hi Ian,

is the funcube dongle block connected to a selector block ?  If I 
remember well , I saw such a much some years ago when somebody tried to 
switch  between alsa- sources.

So it would be helpfull to know the connection diagram at this poit.
vy 73, de Volker

Am 01.04.2013 16:42, schrieb Iain Young, G7III:
> Hi Volker,
>
> You Wrote:
>
> > I tested against 3.6.4, gentoo 64 bit.
> > I'm not very familiar with cmake, so perhaps the cmake code may be
> > improved. Can you send me the error message ?
>
> I think it was just my set of multiple/semi broken trees of various
> 3.6.x branches, precog etc that was confusing cmake et al. A pristine
> gnuradio build from 3.6.4, and it builds perfectly, and I can see the
> new block in grc.
>
> However, when trying to run a flow graph, I get the following:
>
> Set Frequency to: 144700 KHz, corrected to: 144700 Khz
> audio_alsa_source[plughw:1,0]: snd_pcm_hw_params failed: Input/output error
> Traceback (most recent call last):
>    File "/home/iain/FlowGraphs/top_block.py", line 73, in <module>
>      tb.Run(True)
>    File
> "/opt/gnuradio-3.6.4/lib/python2.7/dist-packages/grc_gnuradio/wxgui/top_block_gui.py",
> line 76, in Run
>      self.start()
>    File
> "/opt/gnuradio-3.6.4/lib/python2.7/dist-packages/gnuradio/gr/top_block.py",
> line 97, in start
>      self._tb.start(max_noutput_items)
>    File
> "/opt/gnuradio-3.6.4/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core_runtime.py",
> line 3063, in start
>      return _gnuradio_core_runtime.gr_top_block_sptr_start(self,
> max_noutput_items)
> RuntimeError: check topology failed on audio_alsa_source(11) using
> ninputs=0, noutputs=2
>
>
> Curiously, I got similar error when a few months ago I tried to use
> the FCDPP just as a raw ALSA device, so I guess the error is truly
> within the ALSA subsystem rather than your code, but any ideas ?
>
>
> 73s
>
> Iain
>
>
>
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