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

[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