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#
# 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
##################################################
import waterfall_window
import common
from gnuradio import gr, blks2
from pubsub import pubsub
from constants import *
##################################################
# Waterfall sink block (wrapper for old wxgui)
##################################################
class _waterfall_sink_base(gr.hier_block2):
"""
An fft block with real/complex inputs and a gui window.
"""
def __init__(
self,
parent,
baseband_freq=0,
ref_level=50,
sample_rate=1,
fft_size=512,
fft_rate=waterfall_window.DEFAULT_FRAME_RATE,
average=False,
avg_alpha=None,
title='',
size=waterfall_window.DEFAULT_WIN_SIZE,
ref_scale=2.0,
dynamic_range=80,
num_lines=256,
**kwargs #do not end with a comma
):
#ensure avg alpha
if avg_alpha is None: avg_alpha = 2.0/fft_rate
#init
gr.hier_block2.__init__(
self,
"waterfall_sink",
gr.io_signature(1, 1, self._item_size),
gr.io_signature(0, 0, 0),
)
#blocks
fft = self._fft_chain(
sample_rate=sample_rate,
fft_size=fft_size,
frame_rate=fft_rate,
ref_scale=ref_scale,
avg_alpha=avg_alpha,
average=average,
)
msgq = gr.msg_queue(2)
sink = gr.message_sink(gr.sizeof_float*fft_size, msgq, True)
#connect
self.connect(self, fft, sink)
#controller
self.controller = pubsub()
self.controller.subscribe(AVERAGE_KEY, fft.set_average)
self.controller.publish(AVERAGE_KEY, fft.average)
self.controller.subscribe(AVG_ALPHA_KEY, fft.set_avg_alpha)
self.controller.publish(AVG_ALPHA_KEY, fft.avg_alpha)
self.controller.subscribe(SAMPLE_RATE_KEY, fft.set_sample_rate)
self.controller.publish(SAMPLE_RATE_KEY, fft.sample_rate)
self.controller.subscribe(DECIMATION_KEY, fft.set_decimation)
self.controller.publish(DECIMATION_KEY, fft.decimation)
self.controller.subscribe(FRAME_RATE_KEY, fft.set_vec_rate)
self.controller.publish(FRAME_RATE_KEY, fft.frame_rate)
#start input watcher
common.input_watcher(msgq, self.controller, MSG_KEY)
#create window
self.win = waterfall_window.waterfall_window(
parent=parent,
controller=self.controller,
size=size,
title=title,
real=self._real,
fft_size=fft_size,
num_lines=num_lines,
baseband_freq=baseband_freq,
decimation_key=DECIMATION_KEY,
sample_rate_key=SAMPLE_RATE_KEY,
frame_rate_key=FRAME_RATE_KEY,
dynamic_range=dynamic_range,
ref_level=ref_level,
average_key=AVERAGE_KEY,
avg_alpha_key=AVG_ALPHA_KEY,
msg_key=MSG_KEY,
)
common.register_access_methods(self, self.win)
setattr(self.win, 'set_baseband_freq', getattr(self, 'set_baseband_freq')) #BACKWARDS
class waterfall_sink_f(_waterfall_sink_base):
_fft_chain = blks2.logpwrfft_f
_item_size = gr.sizeof_float
_real = True
class waterfall_sink_c(_waterfall_sink_base):
_fft_chain = blks2.logpwrfft_c
_item_size = gr.sizeof_gr_complex
_real = False
# ----------------------------------------------------------------
# Standalone test app
# ----------------------------------------------------------------
import wx
from gnuradio.wxgui import stdgui2
class test_top_block (stdgui2.std_top_block):
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
fft_size = 512
# build our flow graph
input_rate = 20.000e3
# Generate a complex sinusoid
self.src1 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 5.75e3, 1000)
#src1 = gr.sig_source_c (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1000)
# We add these throttle blocks so that this demo doesn't
# suck down all the CPU available. Normally you wouldn't use these.
self.thr1 = gr.throttle(gr.sizeof_gr_complex, input_rate)
sink1 = waterfall_sink_c (panel, title="Complex Data", fft_size=fft_size,
sample_rate=input_rate, baseband_freq=100e3)
self.connect(self.src1, self.thr1, sink1)
vbox.Add (sink1.win, 1, wx.EXPAND)
# generate a real sinusoid
self.src2 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 5.75e3, 1000)
self.thr2 = gr.throttle(gr.sizeof_float, input_rate)
sink2 = waterfall_sink_f (panel, title="Real Data", fft_size=fft_size,
sample_rate=input_rate, baseband_freq=100e3)
self.connect(self.src2, self.thr2, sink2)
vbox.Add (sink2.win, 1, wx.EXPAND)
def main ():
app = stdgui2.stdapp (test_top_block, "Waterfall Sink Test App")
app.MainLoop ()
if __name__ == '__main__':
main ()
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