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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 number_window
import common
from gnuradio import gr, blks2
from pubsub import pubsub
from constants import *
##################################################
# Number sink block (wrapper for old wxgui)
##################################################
class _number_sink_base(gr.hier_block2):
"""
An decimator block with a number window display
"""
def __init__(
self,
parent,
unit='units',
base_value=None, #ignore (old wrapper)
minval=0,
maxval=1,
factor=1,
decimal_places=3,
ref_level=0,
sample_rate=1,
number_rate=number_window.DEFAULT_NUMBER_RATE,
average=False,
avg_alpha=None,
label='Number Plot',
size=number_window.DEFAULT_WIN_SIZE,
peak_hold=False,
show_gauge=True,
):
#ensure avg alpha
if avg_alpha is None: avg_alpha = 2.0/number_rate
#init
gr.hier_block2.__init__(
self,
"number_sink",
gr.io_signature(1, 1, self._item_size),
gr.io_signature(0, 0, 0),
)
#blocks
sd = blks2.stream_to_vector_decimator(
item_size=self._item_size,
sample_rate=sample_rate,
vec_rate=number_rate,
vec_len=1,
)
if self._real:
mult = gr.multiply_const_ff(factor)
add = gr.add_const_ff(ref_level)
avg = gr.single_pole_iir_filter_ff(1.0)
else:
mult = gr.multiply_const_cc(factor)
add = gr.add_const_cc(ref_level)
avg = gr.single_pole_iir_filter_cc(1.0)
msgq = gr.msg_queue(2)
sink = gr.message_sink(self._item_size, msgq, True)
#connect
self.connect(self, sd, mult, add, avg, sink)
#controller
self.controller = pubsub()
self.controller.subscribe(SAMPLE_RATE_KEY, sd.set_sample_rate)
self.controller.publish(SAMPLE_RATE_KEY, sd.sample_rate)
self.controller[AVERAGE_KEY] = average
self.controller[AVG_ALPHA_KEY] = avg_alpha
def update_avg(*args):
if self.controller[AVERAGE_KEY]: avg.set_taps(self.controller[AVG_ALPHA_KEY])
else: avg.set_taps(1.0)
update_avg()
self.controller.subscribe(AVERAGE_KEY, update_avg)
self.controller.subscribe(AVG_ALPHA_KEY, update_avg)
#start input watcher
common.input_watcher(msgq, self.controller, MSG_KEY)
#create window
self.win = number_window.number_window(
parent=parent,
controller=self.controller,
size=size,
title=label,
units=unit,
real=self._real,
minval=minval,
maxval=maxval,
decimal_places=decimal_places,
show_gauge=show_gauge,
average_key=AVERAGE_KEY,
avg_alpha_key=AVG_ALPHA_KEY,
peak_hold=peak_hold,
msg_key=MSG_KEY,
sample_rate_key=SAMPLE_RATE_KEY,
)
common.register_access_methods(self, self.controller)
#backwards compadibility
self.set_show_gauge = self.win.show_gauges
class number_sink_f(_number_sink_base):
_item_size = gr.sizeof_float
_real = True
class number_sink_c(_number_sink_base):
_item_size = gr.sizeof_gr_complex
_real = False
# ----------------------------------------------------------------
# Standalone test app
# ----------------------------------------------------------------
import wx
from gnuradio.wxgui import stdgui2
class test_app_flow_graph (stdgui2.std_top_block):
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
# build our flow graph
input_rate = 20.48e3
# Generate a real and complex sinusoids
src1 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 2.21e3, 1)
src2 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 2.21e3, 1)
# We add these throttle blocks so that this demo doesn't
# suck down all the CPU available. Normally you wouldn't use these.
thr1 = gr.throttle(gr.sizeof_float, input_rate)
thr2 = gr.throttle(gr.sizeof_gr_complex, input_rate)
sink1 = number_sink_f (panel, unit='V',label="Real Data", avg_alpha=0.001,
sample_rate=input_rate, minval=-1, maxval=1,
ref_level=0, decimal_places=3)
vbox.Add (sink1.win, 1, wx.EXPAND)
sink2 = number_sink_c (panel, unit='V',label="Complex Data", avg_alpha=0.001,
sample_rate=input_rate, minval=-1, maxval=1,
ref_level=0, decimal_places=3)
vbox.Add (sink2.win, 1, wx.EXPAND)
self.connect (src1, thr1, sink1)
self.connect (src2, thr2, sink2)
def main ():
app = stdgui2.stdapp (test_app_flow_graph, "Number Sink Test App")
app.MainLoop ()
if __name__ == '__main__':
main ()
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