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gr-zmqblocks GNU Radio module
=============================
Provides additional blocks and Python classes to connect GNU Radio flowgraphs
over a network and to perform remote procedure calls.
Build requirements
------------------
In order to build the gr-zmqblocks module you will need to install GNU Radio
(http://gnuradio.org/) and ZeroMQ (http://zeromq.org/) including the C++ and
Python bindings.
How to build
------------
In the gr-zmqblocks folder do
mkdir build
cd build
cmake ../
make
optional
make install
How to run the example
----------------------
Assuming that the module has been compiled but not installed, in the
gr-zmqblocks folder do
cd examples
./run_app.sh server
on another terminal or machine
./run_app.sh client -s hostname
You can also run a (remote) GUI on any of the two or a third machine for monitoring and control.
./run_app.sh gui.py -s servername -c hostname
in doing so the order of starting the scripts is arbitrary. When installing the
module, the run\_app.sh script is of course not needed.
How to use the API
------------------
### PROBE API
Connect a zmq pubsub sink to the block you want to monitor
self.zmq_probe = zmqblocks.sink_pubsub(gr.sizeof_float,
"tcp://*:5556")
add a probe manager to your Python GUI
# ZeroMQ
probe_manager = zmqblocks.probe_manager()
probe_manager.add_socket("tcp://localhost:5556",
'float32', self.plot_data)
def plot_data(self,samples):
[...]
basically creates a watcher thread that calls the call back functions and
unpacks sample data. Now you can use a timer to update the plot, e.g. in PyQt
update_timer = Qt.QTimer()
self.connect(update_timer,
QtCore.SIGNAL("timeout()"),
probe_manager.watcher)
update_timer.start(30)
### RPC API
Add an rpc manager to your Python app to receive RPCs
rpc_manager = zmqblocks.rpc_manager()
rpc_manager.set_reply_socket("tcp://*:6666")
rpc_manager.add_interface("start_fg",self.start)
rpc_manager.start_watcher()
to be able to send requests also add one on the other side
rpc_manager = zmqblocks.rpc_manager()
rpc_manager.set_request_socket("tcp://localhost:6666")
send a request
rpc_mganager.request("start_fg")
rpc_mgr_server.request("set_k",gain)
RPCs use GNU Radio pmt's to serialize arguments, the watcher thread will
regularly poll for incoming RPC requests, deserializes arguments and call the
interface callback function accordingly.
Copyright information
------------------
Copyright © 2013 Institute for Theoretical Information Technology,
RWTH Aachen University <https://www.ti.rwth-aachen.de/>
Author: Johannes Schmitz <schmitz@ti.rwth-aachen.de>
Unless otherwise stated, all files are distributed under GPL v3 license.
|
