#!/usr/bin/env python
#
# Copyright 2005,2006,2007 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, eng_notation
from gnuradio import msdd
from gnuradio import blks2
from gnuradio.eng_option import eng_option
from gnuradio.wxgui import slider, powermate
from gnuradio.wxgui import stdgui2, form
from gnuradio.wxgui import fftsink2
from optparse import OptionParser
#from usrpm import usrp_dbid
import sys
import math
import wx
class wfm_rx_block (stdgui2.std_top_block):
def __init__(self,frame,panel,vbox,argv):
stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
parser=OptionParser(option_class=eng_option)
# parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
# help="select MSDD Rx side A or B (default=A)")
parser.add_option("-f", "--freq", type="eng_float", default=100.1e6,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=40,
help="set gain in dB (default is midpoint)")
# parser.add_option("-V", "--volume", type="eng_float", default=None,
# help="set volume (default is midpoint)")
# parser.add_option("-O", "--audio-output", type="string", default="",
# help="pcm device name. E.g., hw:0,0 or surround51 or /dev/dsp")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.frame = frame
self.panel = panel
self.vol = 0
self.gain_range = (10, 70, .5)
self.state = "FREQ"
self.freq = 0
msdd_decim = 2
# build graph
self.fft_size = 8192
self.sample_rate = 200
self.u = msdd.source_c(0, 1, "10.45.4.44", 10000)
self.u.set_decim_rate(4)
self.u.set_desired_packet_size(0, 1460*100)
#self.u.set_decim_rate(msdd_decim)
# usrp_rate = adc_rate / msdd_decim # 320 kS/s
# chanfilt_decim = 1
# demod_rate = usrp_rate / chanfilt_decim
# audio_decimation = 10
# audio_rate = demod_rate / audio_decimation # 32 kHz
#
# if options.rx_subdev_spec is None:
# options.rx_subdev_spec = pick_subdevice(self.u)
#
# self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
# self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
# print "Using RX d'board %s" % (self.subdev.side_and_name(),)
#
#
# chan_filt_coeffs = optfir.low_pass (1, # gain
# usrp_rate, # sampling rate
# 80e3, # passband cutoff
# 115e3, # stopband cutoff
# 0.1, # passband ripple
# 60) # stopband attenuation
# #print len(chan_filt_coeffs)
# chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
#
# self.guts = blks2.wfm_rcv (demod_rate, audio_decimation)
#
# self.volume_control = gr.multiply_const_ff(self.vol)
#
# # sound card as final sink
# audio_sink = audio.sink (int (audio_rate),
# options.audio_output,
# False) # ok_to_block
# now wire it all together
#self.connect (self.u, chan_filt, self.guts, self.volume_control, audio_sink)
self._build_gui(vbox)
if options.gain is None:
# if no gain was specified, use the mid-point in dB
#g = self.subdev.gain_range()
g = self.gain_range
options.gain = float(g[0]+g[1])/2
#
# if options.volume is None:
# g = self.volume_range()
# options.volume = float(g[0]+g[1])/2
#
# if abs(options.freq) < 1e6:
# options.freq *= 1e6
# set initial values
#
self.set_gain(options.gain)
# self.set_vol(options.volume)
if not(self.set_freq(options.freq)):
self._set_status_msg("Failed to set initial frequency")
print "Frequency: ", self.u.rx_freq(0)
def _set_status_msg(self, msg, which=0):
self.frame.GetStatusBar().SetStatusText(msg, which)
def _build_gui(self, vbox):
def _form_set_freq(kv):
return self.set_freq(kv['freq'])
self.src_fft = None
if 1:
self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from MSDD",
fft_size=512, sample_rate=512)
# self.s2f1 = gr.short_to_float()
# self.scope = scopesink2.scope_sink_f(self.panel, sample_rate=self.sample_rate*self.fft_size)
self.connect (self.u, self.src_fft)
#self.connect (self.s2f1, self.scope)
vbox.Add (self.src_fft.win, 4, wx.EXPAND)
#
# if 1:
# post_filt_fft = fftsink2.fft_sink_f(self.panel, title="Post Demod",
# fft_size=1024, sample_rate=usrp_rate,
# y_per_div=10, ref_level=0)
# self.connect (self.guts.fm_demod, post_filt_fft)
# vbox.Add (post_filt_fft.win, 4, wx.EXPAND)
#
# if 0:
# post_deemph_fft = fftsink2.fft_sink_f(self.panel, title="Post Deemph",
# fft_size=512, sample_rate=audio_rate,
# y_per_div=10, ref_level=-20)
# self.connect (self.guts.deemph, post_deemph_fft)
# vbox.Add (post_deemph_fft.win, 4, wx.EXPAND)
# control area form at bottom
self.myform = myform = form.form()
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((5,0), 0)
myform['freq'] = form.float_field(
parent=self.panel, sizer=hbox, label="Freq", weight=1,
callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
hbox.Add((5,0), 0)
myform['freq_slider'] = \
form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
range=(30e6, 6e9, 1e6),
callback=self.set_freq)
hbox.Add((5,0), 0)
vbox.Add(hbox, 0, wx.EXPAND)
hbox = wx.BoxSizer(wx.HORIZONTAL)
hbox.Add((5,0), 0)
#
# myform['volume'] = \
# form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
# weight=3, range=self.volume_range(),
# callback=self.set_vol)
# hbox.Add((5,0), 1)
myform['gain'] = \
form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain",
weight=3, range=self.gain_range,
callback=self.set_gain)
hbox.Add((5,0), 0)
vbox.Add(hbox, 0, wx.EXPAND)
#
# try:
# self.knob = powermate.powermate(self.frame)
# self.rot = 0
# powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate)
# powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button)
# except:
# print "FYI: No Powermate or Contour Knob found"
def on_rotate (self, event):
self.rot += event.delta
if (self.state == "FREQ"):
if self.rot >= 3:
self.set_freq(self.freq + .1e6)
self.rot -= 3
elif self.rot <=-3:
self.set_freq(self.freq - .1e6)
self.rot += 3
else:
step = self.volume_range()[2]
if self.rot >= 3:
self.set_vol(self.vol + step)
self.rot -= 3
elif self.rot <=-3:
self.set_vol(self.vol - step)
self.rot += 3
def on_button (self, event):
if event.value == 0: # button up
return
self.rot = 0
if self.state == "FREQ":
self.state = "VOL"
else:
self.state = "FREQ"
self.update_status_bar ()
#
#
# def set_vol (self, vol):
# g = self.volume_range()
# self.vol = max(g[0], min(g[1], vol))
# self.volume_control.set_k(10**(self.vol/10))
# self.myform['volume'].set_value(self.vol)
# self.update_status_bar ()
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_rx_freq(0, target_freq);
if r:
self.freq = target_freq
self.myform['freq'].set_value(target_freq) # update displayed value
self.myform['freq_slider'].set_value(target_freq) # update displayed value
self.update_status_bar()
self._set_status_msg("OK", 0)
return True
self._set_status_msg("Failed", 0)
return False
def set_gain(self, gain):
self.myform['gain'].set_value(gain) # update displayed value
self.u.set_pga(0,gain)
def update_status_bar (self):
msg = "Volume:%r Setting:%s" % (self.vol, self.state)
self._set_status_msg(msg, 1)
#self.src_fft.set_baseband_freq(self.freq)
#
# def volume_range(self):
# return (-20.0, 0.0, 0.5)
if __name__ == '__main__':
app = stdgui2.stdapp (wfm_rx_block, "MSDD FFT RX")
app.MainLoop ()