I’m trying to get my OP25 flowgraph to work. I am having some issues
with
the FSK4 demodulator and the OP25 Decoder (Combined) blocks. When I run
the
flowgraph, I get the error “Exception: Could not find a FSK4 demodulator
to
use”. This happens whether I use the combined block, or the FSK4
Demodulator and the simple decoder. I have gr-baz, and gr-op25
installed.
In the python shell, I have tried “from gnuradio import fsk4” and I get
“cannot import name fsk4”.
which version of GNU Radio are you working with (gnuradio-config --version)?
I’m not quite sure, but I think the porting of OP25 to GR 3.7 is still
ongoing, so I’m not quite sure it’s supposed to work with current GNU
Radio at this point.
well, I haven’t tested OP25 on neither 3.6 nor 3.7, but the changes
between the 3.6 and 3.7 class naming and module organization are the nr.
1 cause of OOT regressions; I’ve only fired up osmocom.org and had a
look on the OP25 to-do list, which says “Re-engineering and re-factoring
to support GNURadio 3.7 and later.”
Using 3.6 and 3.7 parallely works, but you have to make sure you don’t
mix up things: I’d recommend you install both 3.6 and 3.7 in separate
prefixes (you can install 3.7 into a prefix using pybombs, and follow
the manual route to install 3.6.5 into another prefix [1]); then you
can, by changing a few environment variables, use different versions.
Pybombs will even give you a script you can use to modify paths to
include your 3.7-prefix, and by changing a few lines in that, you can
use a copy to do the same for your 3.6-prefix. Very handy for fiddling
around with GNU Radio itself, without breaking everything that was built
atop of a working GR installation
