Issue with precog with new grextras

GNU Radio
1

i guess some of the older features of grextras are missing in the new
one
like the gr.block . gruel files pmt_blob, pmt_mgr, pmt_extras are also
missing.
Because of all this precog is in broken state.
older grextras ( https://github.com/ncorgan/grextras)
new one (GitHub - guruofquality/grextras: Advanced GNU Radio Blocks )

Is there any fix to this?

2

pre-cog is not 3.7.0 compatible.

You might try using Josh’s gr-compat to see if that helps. Or install
gnu
radio or 3.6.5. Or don’t use pre-cog until we’ve made the appropriate
updates (next week potentially).

-John

3

On 06/12/2013 12:38 PM, Yogesh Dahiya wrote:

i guess some of the older features of grextras are missing in the new one
like the gr.block . gruel files pmt_blob, pmt_mgr, pmt_extras are also
missing.

The newer grextras is just blocks. The features mentioned went into the
advanced scheduler. Home · guruofquality/gras Wiki · GitHub

In particular, all the blob stuff has been replaced a smart buffer which
can be used to pass blobs of data with messages, or represent buffers in
the stream domain. And can go in between message and stream domains w/o
incurring a copy. Heavily used in the new grextras blocks.

Because of all this precog is in broken state.
older grextras ( https://github.com/ncorgan/grextras)
new one (GitHub - guruofquality/grextras: Advanced GNU Radio Blocks )

Is there any fix to this?

Precog requires an older version of grextras on this branch:
http://lists.gnu.org/archive/html/discuss-gnuradio/2013-05/msg00492.html

Sorry for the confusion. At this particular period in time the software
seems to be all over the place and nothing is versioned or released yet.

-josh

4

Hey
I have been reading your source code and wikki. I am getting comfortable
with notion of blobs and msg passing. Your simple_mac and fhss engine
are
good examples of block abstraction. I am working on writing mac for
cognitive radio myself. I want to create my own blocks and use concepts
blobs and msg passing. I tried Josh’s gr-compat it did’nt work. So is
there
a way i can get that gr.block and blob part of old gr-extras without
reverting back to older version.
Thanks