On Fri, Jan 6, 2012 at 12:47 AM, Shalabh Jain <[email protected]>wrote:
> Hello,
>
> I recently installed the latest git pull of both the GNU Radio and UHD
> driver. I am getting the some relating to USRP initialization errors when
> I'm running some of the examples provided. max_power.py
> and digital_bert_tx.py or rx.py.
> My setup seems correct since I can run the fft scripts etc.
>
> It seems to be some kind of overflow that is causing this but I am not
> able to figure out why. I tried to use my limited debugging skills and have
> these comments
>
> 1. Since bert is similar to the benchmark_tx, on comparing the two, I see
> that in digital_bert_tx, the error goes away if you comment out
> self._modulator = self._modulator_class(**mod_kwargs)
> and pass
> self._modulator_class(**mod_kwargs)._constellation
> to the bert transmitter chain initialization.
>
> 2. There is a minor mismatch in the arguments to the uhd_transmitter
> initialization, a subdevice is expected between options.tx_gain
> and options.antenna.
> But that is certainly not causing the error.
>
> 3. Looking at the C++ source code, the line of code that is actually
> throwing the exception is in the UHD tree (Line 152 in the
> uhd_src/host/lib/device.cpp)
> device::sptr dev = maker(dev_addr);
>
I'll look into this tomorrow. When we moved everything to gr-digital and
all of the examples to using UHD, we were moving quickly, and this might
have been left behind after some change. I know it was working when I first
added it. It looks like you found the fix; I'll verify it tomorrow.
> 4. I cannot figure out any temporary fix for the max_power.py failure.
>
I was debating over whether or not to even include this example when we
moved to using the UHD. This was a program only designed for the first gen
USRPs and libusrp. It's really probably not applicable to the conditions
under the UHD anymore, anyway. Again, I'll check it tomorrow.
> Has anybody else faced similar issues before or have any suggestions for
> debugging directions?
>
> Thanks
> Shalabh
>
Thanks for the feedback!
Tom
> Traceback (most recent call last): - From bert
> File "./digital_bert_tx.py", line 130, in <module>
> tb = tx_psk_block(mod, options)
> File "./digital_bert_tx.py", line 73, in __init__
> options.antenna, options.verbose)
> File
> "/home/gnuradio/Shared/sj/usrp_stuff/code/s_eg/digital/narrowband/uhd_interface.py",
> line 137, in __init__
> freq, gain, spec, antenna)
> File
> "/home/gnuradio/Shared/sj/usrp_stuff/code/s_eg/digital/narrowband/uhd_interface.py",
> line 49, in __init__
> self.u = uhd.usrp_sink(device_addr=args,
> stream_args=uhd.stream_args('fc32'))
> File
> "/opt/gnuradio-3.5/lib/python2.6/dist-packages/gnuradio/uhd/__init__.py",
> line 112, in constructor_interceptor
> return old_constructor(*args)
> File
> "/opt/gnuradio-3.5/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py",
> line 2320, in usrp_sink
> return _uhd_swig.usrp_sink(*args)
> RuntimeError: Error in function boost::math::round<d>(d): Value -nan can
> not be represented in the target integer type.
>
>
>
> Traceback (most recent call last): - From max_power.py
> File "./max_power.py", line 140, in <module>
> main ()
> File "./max_power.py", line 133, in main
> tb = build_block (options.args, options.tx_enable, options.rx_enable)
> File "./max_power.py", line 63, in __init__
> self.u_tx = uhd.usrp_sink(device_addr=args, stream_args=stream_args)
> File
> "/opt/gnuradio-3.5/lib/python2.6/dist-packages/gnuradio/uhd/__init__.py",
> line 112, in constructor_interceptor
> return old_constructor(*args)
> File
> "/opt/gnuradio-3.5/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py",
> line 2320, in usrp_sink
> return _uhd_swig.usrp_sink(*args)
> RuntimeError: Error in function boost::math::round<d>(d): Value -nan can
> not be represented in the target integer type.
>
>
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