Re: [Discuss-gnuradio] Companion flow error

[Nate Temple]

Hi Nikos,

Glad to hear that it is working. As far as it displaying a black screen, that 
is because baudline isn't representing enough dynamic range for the USRP. A 
little trick, if you add a Multi Const block before the baudline sink, and 
enter a value of 1000 or 10000, it will artificially increase the signal 
magnitude to where baudline will display. 

You can also adjust the Color Aperture [1] , which may or may not help.

[1] http://www.baudline.com/manual/color_picker.html#color_aperture

- Nate



> On Mar 8, 2016, at 9:45 PM, Nikos Balkanas <address@hidden> wrote:
> 
> That did it.
> 
> Thank you all very much. I didn't get any real spectrum out of it, just a 
> black screen, but at least i know that my companion flow setup works:)
> I prefer gr-fosphor to baudline:)
> I hope that other blocks include more documentation (baudline sink has none), 
> and that error messages are more specific (i.e. filename in missing file 
> error)
> 
> BR,
> Nikos
> 
> On Wed, Mar 9, 2016 at 7:08 AM, Nate Temple <address@hidden> wrote:
> Hi Nikos,
> 
> You need the baudline binary which is here [1]. It will unpack to the folder 
> baudline_1.08_linux_x86_64/. Put the contents in the folder 
> baudline_1.08_linux_x86_64/ in your home directory. You should then be able 
> to call the command "baudline" and if that works, the GR sink block should 
> work.
> 
> [1] - http://www.baudline.com/baudline_1.08_linux_x86_64.tar.gz
> 
> 
> - Nate
> 
> 
> > On Mar 8, 2016, at 8:59 PM, Nikos Balkanas <address@hidden> wrote:
> >
> > Hi Nate,
> >
> > I imagine you refer to baudline.py which is in the error trace.
> >
> > > baudline
> > baudline: command not found
> >
> > For baudline.py to run, I would have to have /usr/local/lib/python2.7/... 
> > part of my PATH, which i don't.
> >
> > > echo $PATH
> > /opt/AMDAPPSDK-3.0:/opt/AMD/CodeXL:/home/nikos/bin:/home/nikos/baudline_1.08_linux_x86_64:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:.
> > Is this smt i should add to my PATH?
> >
> > > ls -la baudline_1.08_linux_x86_64
> > total 8
> > drwxrwxr-x 2 nikos nikos 4096 Mar 9 04:31 .
> > drwxr-xr-x 54 nikos nikos 4096 Mar 9 06:52 ..
> >
> > BR,
> > Nikos
> >
> > On Wed, Mar 9, 2016 at 6:51 AM, Nate Temple <address@hidden> wrote:
> > Hi Nikos,
> >
> > Does baudline start if you just run the command "baudline" from the 
> > terminal?
> >
> > Can you send the output of this command:
> >
> > ls -al /home/nikos/baudline_1.08_linux_x86_64 ​
> >
> >
> > - Nate
> >
> >
> > > On Mar 8, 2016, at 8:33 PM, Nikos Balkanas <address@hidden> wrote:
> > >
> > > Hi Marcus,
> > >
> > > I imagine you mean the top_block.py generated by the flow.
> > >
> > > The output is much longer, includes all x300 initialization sequences, 
> > > but eventually I get the same error as before:(
> > >
> > > Nikos
> > >
> > > On Wed, Mar 9, 2016 at 6:22 AM, Marcus D. Leech <address@hidden> wrote:
> > > On 03/08/2016 11:10 PM, Nikos Balkanas wrote:
> > >> Hi Nate,
> > >>
> > >> Not really. I added line to .profile (that's where I maintain PATH) and 
> > >> reexported PATH with the new value, b4 starting the companion. It 
> > >> shouldn't make a difference.
> > >> I then rebooted my PC, just to make sure that PATH was updated 
> > >> correctly, same error as before.
> > >>
> > >> BR,
> > >> Nikos
> > > If you just try to execute the generated .py file, from a window that 
> > > apparently has correct PATH, what happens?
> > >
> > >
> > >>
> > >> On Wed, Mar 9, 2016 at 5:45 AM, Nate Temple <address@hidden> wrote:
> > >> Hi Nikos,
> > >>
> > >> Did you restart gnuradio-companion from a new terminal after adding the 
> > >> line to your ~/.bashrc file?
> > >>
> > >>
> > >> - Nate
> > >>
> > >>
> > >> > On Mar 8, 2016, at 7:09 PM, Nikos Balkanas <address@hidden> wrote:
> > >> >
> > >> > ​Hi Nate,
> > >> >
> > >> > Thank you for your fast reply. I tried your suggestions, but i seem to 
> > >> > still get the same error:
> > >> >
> > >> > > echo $PATH
> > >> > /opt/AMDAPPSDK-3.0:/opt/AMD/CodeXL:/home/nikos/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:.:/home/nikos/baud:/home/nikos/baudline_1.08_linux_x86_64
> > >> >  ​
> > >> >
> > >> > > ls -ld baud*
> > >> > drwxrwxr-x 2 nikos nikos 4096 Mar 9 04:31 baudline_1.08_linux_x86_64
> > >> >
> > >> > >['baudline', '-stdin', '-record', '-spacebar', 'recordpause', 
> > >> > >'-samplerate', '40000000', '-channels', '2', '-format', 'le32f', 
> > >> > >'-quadrature', '-basefrequency', '2100000000.0']
> > >> > [Errno 2] No such file or directory
> > >> > Traceback (most recent call last):
> > >> > File "/home/nikos/Desktop/top_block.py", line 116, in <module>
> > >> > tb = top_block()
> > >> > File "/home/nikos/Desktop/top_block.py", line 84, in __init__
> > >> > **{})
> > >> > File "/usr/local/lib/python2.7/dist-packages/baz/baudline.py", line 
> > >> > 146, in __init__
> > >> > self.p = subprocess.Popen(baudline_exec, stdin=subprocess.PIPE)       
> > >> > # , stdout=subprocess.PIPE, stderr=subprocess.PIPE, bufsize=16384 or -1
> > >> > File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
> > >> > errread, errwrite)
> > >> > File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
> > >> > raise child_exception
> > >> > OSError: [Errno 2] No such file or directory
> > >> >
> > >> > >>> Done
> > >> >
> > >> > Attaching new flowgraph and top_block.py.
> > >> >
> > >> > BR
> > >> > Nikos
> > >> >
> > >> >
> > >> >
> > >> > <Tutorial.grc><top_block.py>
> > >>
> > >>
> > >>
> > >>
> > >> _______________________________________________
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> > >>
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> > >
> > >
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