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#!/usr/bin/env python
#
# Copyright 2011 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.
#
from gnuradio import gr, gru
from gnuradio import uhd
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from gnuradio.wxgui import stdgui2, fftsink2, waterfallsink2, scopesink2, form, slider
from optparse import OptionParser
import wx
import sys
import numpy
class app_top_block(stdgui2.std_top_block):
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
self.frame = frame
self.panel = panel
parser = OptionParser(option_class=eng_option)
parser.add_option("-a", "--address", type="string", default="addr=192.168.10.2",
help="Address of UHD device, [default=%default]")
parser.add_option("-A", "--antenna", type="string", default=None,
help="select Rx Antenna where appropriate")
parser.add_option("-s", "--samp-rate", type="eng_float", default=1e6,
help="set sample rate (bandwidth) [default=%default]")
parser.add_option("-f", "--freq", type="eng_float", default=None,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-W", "--waterfall", action="store_true", default=False,
help="Enable waterfall display")
parser.add_option("-S", "--oscilloscope", action="store_true", default=False,
help="Enable oscilloscope display")
parser.add_option("", "--avg-alpha", type="eng_float", default=1e-1,
help="Set fftsink averaging factor, default=[%default]")
parser.add_option("", "--ref-scale", type="eng_float", default=1.0,
help="Set dBFS=0dB input value, default=[%default]")
parser.add_option("--fft-size", type="int", default=1024,
help="Set number of FFT bins [default=%default]")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.options = options
self.show_debug_info = True
self.u = uhd.usrp_source(device_addr=options.address,
io_type=uhd.io_type.COMPLEX_FLOAT32,
num_channels=1)
self.u.set_samp_rate(options.samp_rate)
input_rate = self.u.get_samp_rate()
if options.waterfall:
self.scope = \
waterfallsink2.waterfall_sink_c (panel, fft_size=1024, sample_rate=input_rate)
self.frame.SetMinSize((800, 420))
elif options.oscilloscope:
self.scope = scopesink2.scope_sink_c(panel, sample_rate=input_rate)
self.frame.SetMinSize((800, 600))
else:
self.scope = fftsink2.fft_sink_c (panel,
fft_size=options.fft_size,
sample_rate=input_rate,
ref_scale=options.ref_scale,
ref_level=20.0,
y_divs = 12,
avg_alpha=options.avg_alpha)
self.frame.SetMinSize((800, 420))
self.connect(self.u, self.scope)
self._build_gui(vbox)
self._setup_events()
# set initial values
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.u.get_gain_range()
options.gain = float(g.start()+g.stop())/2
if options.freq is None:
# if no freq was specified, use the mid-point
r = self.u.get_freq_range()
options.freq = float(r.start()+r.stop())/2
self.set_gain(options.gain)
if(options.antenna):
self.u.set_antenna(options.antenna, 0)
if self.show_debug_info:
self.myform['samprate'].set_value(self.u.get_samp_rate())
self.myform['fs@gbe'].set_value(input_rate)
self.myform['baseband'].set_value(0)
self.myform['ddc'].set_value(0)
if not(self.set_freq(options.freq)):
self._set_status_msg("Failed to set initial frequency")
def _set_status_msg(self, msg):
self.frame.GetStatusBar().SetStatusText(msg, 0)
def _build_gui(self, vbox):
def _form_set_freq(kv):
return self.set_freq(kv['freq'])
vbox.Add(self.scope.win, 10, wx.EXPAND)
# add control area at the bottom
self.myform = myform = form.form()
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((5,0), 0, 0)
myform['freq'] = form.float_field(
parent=self.panel, sizer=hbox, label="Center freq", weight=1,
callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
hbox.Add((5,0), 0, 0)
g = self.u.get_gain_range()
# some configurations don't have gain control
if g.stop() > g.start():
myform['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain",
weight=3,
min=int(g.start()), max=int(g.stop()),
callback=self.set_gain)
hbox.Add((5,0), 0, 0)
vbox.Add(hbox, 0, wx.EXPAND)
self._build_subpanel(vbox)
def _build_subpanel(self, vbox_arg):
# build a secondary information panel (sometimes hidden)
# FIXME figure out how to have this be a subpanel that is always
# created, but has its visibility controlled by foo.Show(True/False)
def _form_set_samp_rate(kv):
return self.set_samp_rate(kv['samprate'])
if not(self.show_debug_info):
return
panel = self.panel
vbox = vbox_arg
myform = self.myform
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((5,0), 0)
myform['samprate'] = form.float_field(
parent=panel, sizer=hbox, label="Sample Rate",
callback=myform.check_input_and_call(_form_set_samp_rate, self._set_status_msg))
hbox.Add((5,0), 1)
myform['fs@gbe'] = form.static_float_field(
parent=panel, sizer=hbox, label="Fs@GbE")
hbox.Add((5,0), 1)
myform['baseband'] = form.static_float_field(
parent=panel, sizer=hbox, label="Analog BB")
hbox.Add((5,0), 1)
myform['ddc'] = form.static_float_field(
parent=panel, sizer=hbox, label="DDC")
hbox.Add((5,0), 0)
vbox.Add(hbox, 0, wx.EXPAND)
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = self.u.set_center_freq(target_freq, 0)
if r:
self.myform['freq'].set_value(target_freq) # update displayed value
if self.show_debug_info:
self.myform['baseband'].set_value(r.actual_rf_freq)
self.myform['ddc'].set_value(r.actual_dsp_freq)
if not self.options.oscilloscope:
self.scope.set_baseband_freq(target_freq)
return True
return False
def set_gain(self, gain):
if self.myform.has_key('gain'):
self.myform['gain'].set_value(gain) # update displayed value
self.u.set_gain(gain, 0)
def set_samp_rate(self, samp_rate):
ok = self.u.set_samp_rate(samp_rate)
input_rate = self.u.get_samp_rate()
self.scope.set_sample_rate(input_rate)
if self.show_debug_info: # update displayed values
self.myform['samprate'].set_value(self.u.get_samp_rate())
self.myform['fs@gbe'].set_value(input_rate)
# uhd set_samp_rate never fails; always falls back to closest requested.
return True
def _setup_events(self):
if not self.options.waterfall and not self.options.oscilloscope:
self.scope.win.Bind(wx.EVT_LEFT_DCLICK, self.evt_left_dclick)
def evt_left_dclick(self, event):
(ux, uy) = self.scope.win.GetXY(event)
if event.CmdDown():
# Re-center on maximum power
points = self.scope.win._points
if self.scope.win.peak_hold:
if self.scope.win.peak_vals is not None:
ind = numpy.argmax(self.scope.win.peak_vals)
else:
ind = int(points.shape()[0]/2)
else:
ind = numpy.argmax(points[:,1])
(freq, pwr) = points[ind]
target_freq = freq/self.scope.win._scale_factor
print ind, freq, pwr
self.set_freq(target_freq)
else:
# Re-center on clicked frequency
target_freq = ux/self.scope.win._scale_factor
self.set_freq(target_freq)
def main ():
app = stdgui2.stdapp(app_top_block, "UHD FFT", nstatus=1)
app.MainLoop()
if __name__ == '__main__':
main ()
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