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constsink.py
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constsink.py
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#!Modified Version, does not have control GUI!
#
# Copyright 2008 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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.
#
# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
##################################################
# Imports
##################################################
from gnuradio.wxgui import common, plotter
from gnuradio import gr, blks2
from gnuradio.wxgui.pubsub import pubsub
from gnuradio.wxgui.constants import *
import utils
import wx, numpy
##################################################
# Constellation sink block (wrapper for old wxgui)
##################################################
class const_sink_c(gr.hier_block2):
"""
A constellation block with a gui window.
"""
def __init__(
self,
parent,
title='',
sample_rate=1,
size=(495,450),
frame_rate=5,
const_size=1024,
mod='DBPSK'):
#init
gr.hier_block2.__init__(
self,
"const_sink",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
gr.io_signature(0, 0, 0),
)
self.sd = blks2.stream_to_vector_decimator(
item_size=gr.sizeof_gr_complex,
sample_rate=sample_rate,
vec_rate=frame_rate,
vec_len=const_size,
)
self. agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100)
self.gain= gr.multiply_const_cc(utils.gain[mod])
msgq = gr.msg_queue(2)
sink = gr.message_sink(gr.sizeof_gr_complex*const_size, msgq, True)
#connect
self.connect(self, self.agc, self.gain, self.sd, sink)
#controller
def setter(p, k, x): p[k] = x
self.controller = pubsub()
#initial update
common.input_watcher(msgq, self.controller, MSG_KEY)
#create window
self.win = const_window(
parent=parent,
controller=self.controller,
size=size,
title=title,
msg_key=MSG_KEY
)
common.register_access_methods(self, self.win)
def change_mod(self,mod):
self.gain.set_k(utils.gain[mod])
##################################################
# Constellation window with plotter and control panel
##################################################
class const_window(wx.Panel, pubsub):
def __init__(
self,
parent,
controller,
size,
title,
msg_key
):
pubsub.__init__(self)
#proxy the keys
self.proxy(MSG_KEY, controller, msg_key)
#initialize values
self[RUNNING_KEY] = True
self[X_DIVS_KEY] = 8
self[Y_DIVS_KEY] = 8
self[MARKER_KEY] = 2.0
#init panel and plot
wx.Panel.__init__(self, parent, style=wx.SIMPLE_BORDER)
self.plotter = plotter.channel_plotter(self)
self.plotter.SetSize(wx.Size(*size))
self.plotter.set_title(title)
self.plotter.set_x_label('Inphase')
self.plotter.set_y_label('Quadrature')
self.plotter.enable_point_label(False)
self.plotter.enable_grid_lines(True)
self.subscribe(MSG_KEY, self.handle_msg)
#initial update
self.update_grid()
def handle_msg(self, msg):
"""
Plot the samples onto the complex grid.
@param msg the array of complex samples
"""
if not self[RUNNING_KEY]: return
#convert to complex floating point numbers
samples = numpy.fromstring(msg, numpy.complex64)
real = numpy.real(samples)
imag = numpy.imag(samples)
#plot
self.plotter.set_waveform(
channel=0,
samples=(real, imag),
color_spec=(0,0,1),
marker=2.0,
)
#update the plotter
self.plotter.update()
def update_grid(self):
#update the x axis
x_max = 1.75
self.plotter.set_x_grid(-x_max, x_max, common.get_clean_num(2.0*x_max/self[X_DIVS_KEY]))
#update the y axis
y_max = 1.75
self.plotter.set_y_grid(-y_max, y_max, common.get_clean_num(2.0*y_max/self[Y_DIVS_KEY]))
#update plotter
self.plotter.update()