Re: 3.9 Setup for OOT development

[Criss Swaim]

I have not used 3.9, but I have seen this behavior in 3.8 when the

gr_modtool makeyaml blockname

step was skipped.

I would suggest running this step then re-make/make install.

After running this you should see the input/output parameters defined in the yaml file

Criss Swaim
cswaim@tpginc.net
cell: 505.301.5701

On 1/22/2021 4:07 PM, Gavin Jacobs wrote:

You may recall that I was asking about gr_modtool a week ago. I've made some progress and I think I'm very close to making my block work. I'm using Ubuntu Desktop 20.04 in a Virtual Machine, with GNU Radio 3.9.0.0git~master~14059~focal.

Here is what I've learned so far:

packages needed: git doxygen clang-format cmake pybind11-dev python3-pygccxml liborc-0.4-dev

workflow:

cd ~/modules

gr_modtool newmod modulename

cd gr-modulename

gr_modtool add blockname

  < answer questions about blockname >

  < edit ./lib/blockname_impl.h ./lib/blockname_impl.cc ./include/modulename/blockname.h >

gr_modtool makeyaml

  < edit ./grc/modulename_blockname.block.yml

gr_modtool bind blockname

mkdir build

cd build

cmake ../

  < check for errors; ignore '-- Could NOT find MPIR ...'

make

sudo make install

sudo ldconfig (needed once on ubuntu, after initial 'sudo make install')

 < check gnuradio-companion for modulename->blockname; test blockname >

My block is a trivial block that copies a float input to a float output. There are no parameters. I've gone through the above steps without errors, and I get to the very end, where I can see the block in the gnuradio-companion list, BUT when I try to add it to a flowgraph, it won't show up on the canvas. I've tried double-click and drag/drop, but neither puts the block in the flowgraph.

I would like to hear from anyone who has built an OOT block from scratch, using 3.9.0 gr_modtool.

Is the above procedure correct?

What might cause the block to not load?

Assuming I get it working, is there a page planned on the wiki where I can document the procedures, tips, and pitfalls(I've found a few)?

Thanks,

Gavin