Re: Tutorial on Hier Block and Parameters

[Volker Schroer]

I think, the PYTHONPATH should not start with :
and it is not required that the PYTHONPATH contains the location of your
grc files.
~/.grc_gnuradio is not a file but a directory. If this diretocry does
not exist, just create it.

Copy your generated *.yml and *.py from your working directory to
~/.grc_gnuradio


What's the output of grc when you start it?

On my system it looks like:

grc
<<< Welcome to GNU Radio Companion v3.10.0.0-22-g7712360d >>>

Block paths:
        /home/schroer/.grc_gnuradio
        /usr/local/gnuradio/share/gnuradio/grc/blocks

The second path points to the gnuradio blocks and depends on your
installation., probably
/usr/share/gnuradio/grc/blocks/

If grc references your .grc_gnuradio directory , you should find your
created blocks in grc.

If the reference is missing have a look at
~/.gnuradio/config.conf

There should be a section like

[grc]
canvas_default_size = 1280, 1024
canvas_font_size = 8
default_flow_graph =
enabled_components =
testing-support;python-support;man-pages;gnuradio-runtime;gr-ctrlport;gnuradio-companion;gr-blocks;gr-fec;gr-fft;gr-filter;gr-analog;gr-digital;gr-dtv;gr-audio;*
alsa;* oss;gr-channels;gr-pdu;gr-iio;*
libad9361;gr-qtgui;gr-trellis;gr-utils;gr_modtool;gr_blocktool;gr-vocoder;gr-network
global_blocks_path = /usr/local/gnuradio/share/gnuradio/grc/blocks
local_blocks_path =
xterm_executable = /usr/bin/xterm

Here you can specify your local_blocks_path


I hope this helps.

-- Volker
> The output is
>
> echo $PYTHONPATH
> :/home/grctut/the folder where I am saving working grc files.
> However, I am able to use GRC for other purposes normally. I notice that
> GRC blocks (.yaml files) are in /usr/share/gnuradio/grc/blocks/ folder.
> Also there is no .grc_gnuradio file in my home directory. However, there
> is a .gnuradio folder with a prefs folder and config.conf and grc.conf
> files. prefs folder has a vmcircbuf_default_factory file.
>
>
>
>     ------------------------------
>
>     Message: 3
>     Date: Sat, 12 Feb 2022 12:07:37 +0100
>     From: Volker Schroer <dl1ksv@gmx.de <mailto:dl1ksv@gmx.de>>
>     To: discuss-gnuradio@gnu.org <mailto:discuss-gnuradio@gnu.org>
>     Subject: Re: Tutorial on Hier Block and Parameters
>     Message-ID: <a21da2e7-fea7-ecce-9de3-4b1567795e05@gmx.de
>     <a21da2e7-fea7-ecce-9de3-4b1567795e05@gmx.de">mailto:a21da2e7-fea7-ecce-9de3-4b1567795e05@gmx.de>>
>     Content-Type: text/plain; charset=UTF-8; format=flowed
>
>     Yes, that the generated hier block files go to the working directory of
>     ~/.grc_gnuradio is a known bug.
>
>     See:
>     https://github.com/gnuradio/gnuradio/pull/5547
>     <https://github.com/gnuradio/gnuradio/pull/5547>
>
>     What is the result of
>
>     echo $PYTHONPATH
>
>
>     -- Volker
>      > Hi,
>      > I am facing a problem  using the tutorial. My installation is from
>      > repository.
>      > I am using GRC3.10.1.1(Python3.8.10) on OS Ubuntu 20.04.3LTS.
>      > When I generate the flow graph, output files are going to the working
>      > directory and not .grc_gnuradio as mentioned in tutorial. Probably
>      > because of this, they are not appearing in the block tree of GRC.
>     Also,
>      > I get these messages on the terminal.
>      > Warning: vocoder_codec2_decode_ps - option_attributes are for enums
>      > only, ignoring
>      >  >>> Warning: vocoder_codec2_encode_sp - option_attributes are
>     for enums
>      > only, ignoring
>      > May not be relevant, but I observe whenever I open the terminal, the
>      > following line appears before the command prompt.
>      > PYTHONPATH: command not found
>      > Please help me in configuring GRC properly. Or do i have to install
>      > gnuradio in home directory instead of system installation?
>      >
>      > --
>      > Best Regards,
>      > vsrk sarma
>
> --
> Best Regards,
> vsrk sarma