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#!/usr/bin/env python
#
# Copyright 2013 Institute for Theoretical Information Technology,
# RWTH Aachen University
#
# Authors: Johannes Schmitz <schmitz@ti.rwth-aachen.de>
#
# This is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This software is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this software; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
###############################################################################
# Imports
###############################################################################
from gnuradio import zeromq
from gnuradio import gr
from gnuradio import blocks
from gnuradio import analog
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
import numpy
import signal
import gui
from PyQt4 import QtGui
import sys
###############################################################################
# GNU Radio top_block
###############################################################################
class top_block(gr.top_block):
def __init__(self, options):
gr.top_block.__init__(self)
self.options = options
# create a QT application
self.qapp = QtGui.QApplication(sys.argv)
# give Ctrl+C back to system
signal.signal(signal.SIGINT, signal.SIG_DFL)
# socket addresses
rpc_adr_server = "tcp://localhost:6666"
rpc_adr_reply = "tcp://*:6666"
probe_adr_gui = "tcp://localhost:5556"
probe_adr_fg = "tcp://*:5556"
sink_adr = "tcp://*:5555"
source_adr = "tcp://localhost:5555"
# create the main window
self.ui = gui.gui("Loop",rpc_adr_server,rpc_adr_server,probe_adr_gui)
self.ui.show()
# the strange sampling rate gives a nice movement in the plot :P
self.samp_rate = samp_rate = 48200
# blocks
self.gr_sig_source = analog.sig_source_f(samp_rate, analog.GR_SIN_WAVE , 1000, 1, 0)
self.null_source = blocks.null_source(gr.sizeof_float)
self.throttle = blocks.throttle(gr.sizeof_float, samp_rate)
self.zmq_source = zeromq.source_pushpull_feedback(gr.sizeof_float,source_adr)
self.mult_a = blocks.multiply_const_ff(1)
self.mult_b = blocks.multiply_const_ff(0.5)
self.add = blocks.add_ff(1)
#self.zmq_sink = zeromq.sink_reqrep_nopoll(gr.sizeof_float, sink_adr)
#self.zmq_sink = zeromq.sink_reqrep(gr.sizeof_float, sink_adr)
self.zmq_sink = zeromq.push_sink(gr.sizeof_float, sink_adr)
self.zmq_probe = zeromq.push_sink(gr.sizeof_float, probe_adr_fg)
#self.null_sink = blocks.null_sink(gr.sizeof_float)
# connects
self.connect(self.gr_sig_source, self.mult_a)
self.connect(self.zmq_source, self.mult_b, (self.add,1))
# self.connect(self.null_source, (self.add,1))
self.connect(self.mult_a, (self.add, 0), self.throttle, self.zmq_sink)
self.connect(self.throttle, self.zmq_probe)
# ZeroMQ
self.rpc_manager = zeromq.rpc_manager()
self.rpc_manager.set_reply_socket(rpc_adr_reply)
self.rpc_manager.add_interface("start_fg",self.start_fg)
self.rpc_manager.add_interface("stop_fg",self.stop_fg)
self.rpc_manager.add_interface("set_waveform",self.set_waveform)
self.rpc_manager.add_interface("set_k",self.mult_a.set_k)
self.rpc_manager.add_interface("get_sample_rate",self.throttle.sample_rate)
self.rpc_manager.start_watcher()
def start_fg(self):
print "Start Flowgraph"
try:
self.start()
except RuntimeError:
print "Can't start, flowgraph already running!"
def stop_fg(self):
print "Stop Flowgraph"
self.stop()
self.wait()
def set_waveform(self, waveform_str):
waveform = {'Constant' : analog.GR_CONST_WAVE,
'Sine' : analog.GR_SIN_WAVE,
'Cosine' : analog.GR_COS_WAVE,
'Square' : analog.GR_SQR_WAVE,
'Triangle' : analog.GR_TRI_WAVE,
'Saw Tooth' : analog.GR_SAW_WAVE}[waveform_str]
self.gr_sig_source.set_waveform(waveform)
###############################################################################
# Options Parser
###############################################################################
def parse_options():
""" Options parser. """
parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
(options, args) = parser.parse_args()
return options
###############################################################################
# Main
###############################################################################
if __name__ == "__main__":
options = parse_options()
tb = top_block(options)
tb.qapp.exec_()
tb.stop()
tb = None
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