Re: [Discuss-gnuradio] RuntimeError: bad lexical cast: source type value could not be interpreted as target

[Tobias Schmid]

Hello,

sorry I had been out of office for some days.

When I run uhd_usrp_probe the error doesn't occur.
And using uhd.single_usrp_source doesn't occur either.

The complete output of the terminal is:

linux; GNU C++ version 4.4.1 [gcc-4_4-branch revision 150839]; Boost_103900; 
UHD_0001.20101124180824.2568efd

Current recv sock buff size: 50000000 bytes
Current recv sock buff size: 50000000 bytes
Traceback (most recent call last):
  File "/home/gnuradio/Desktop/top_block.py", line 95, in<module>
    tb = top_block()
  File "/home/gnuradio/Desktop/top_block.py", line 35, in __init__
    num_channels=2,
  File "/usr/local/lib/python2.6/site-packages/gnuradio/uhd/uhd_swig.py", line 
1023, in multi_usrp_source
    return _uhd_swig.multi_usrp_source(*args, **kwargs)
RuntimeError: bad lexical cast: source type value could not be interpreted as 
target

The error also occurs when using udh.multi_usrp_sink.
Maybe that could be another hint.

By the way, what do I have to do to run a discontinous data transmission
using uhd.single_usrp_source.
I implemented some ARQ-protocols using USRP driver. Now I wanted to
upgreade these applications, but it doesn't work well.

Thanks,

Tobias

Am 26.11.2010 17:53, schrieb Josh Blum:
>  boost lexical cast doesnt have a very telling error does it...
>
>  Can you send me the complete verbose?
>
>  Does the error happen when you run uhd_usrp_probe?
>
>  Howabout uhd.single_usrp_source?
>
>  Does GDB give any hint as to where the exception is thrown?
>
>  Thanks,
>  -Josh
>
>  On 11/26/2010 04:05 AM, Tobias Schmid wrote:
>
> >  Hello,
> >
> >  I'm trying to use 2 USRP2 using the UHD Driver.
> >  My version is the git version of yesterday.
> >
> >  But when I'm trying to build a flowgraph using grc,
> >  gnuradio isn't able to run the generated code.
> >
> >  The following error occurs:
> >
> >  RuntimeError: bad lexical cast: source type value could not be interpreted as 
> > target
> >
> >  And this is the generated code:
> >
> >  self.uhd_multi_usrp_source_0 = uhd.multi_usrp_source(
> >  device_addr="addr=192.168.10.2 192.168.10.3",
> >  io_type=uhd.io_type_t.COMPLEX_FLOAT32,
> >  num_channels=2,
> >  )
> >  _clk_cfg = uhd.clock_config_t()
> >  _clk_cfg.ref_source = uhd.clock_config_t.REF_SMA
> >  _clk_cfg.pps_source = uhd.clock_config_t.PPS_SMA
> >  _clk_cfg.pps_polarity = uhd.clock_config_t.PPS_POS
> >  self.uhd_multi_usrp_source_0.set_clock_config(_clk_cfg, uhd.ALL_MBOARDS);
> >  self.uhd_multi_usrp_source_0.set_time_unknown_pps(uhd.time_spec_t())
> >  self.uhd_multi_usrp_source_0.set_samp_rate(1000000)
> >  self.uhd_multi_usrp_source_0.set_center_freq(2450000000, 0)
> >  self.uhd_multi_usrp_source_0.set_gain(20, 0)
> >  self.uhd_multi_usrp_source_0.set_center_freq(2450000000, 1)
> >  self.uhd_multi_usrp_source_0.set_gain(20, 1)
> >
> >  Can someone help me solving this problem?
> >
> >  Best regards,
> >
> >  Tobias
> >
> >
> >
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