diff options
Diffstat (limited to 'gnuradio-examples/python')
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_am_mw_rcv.py | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/gnuradio-examples/python/usrp/usrp_am_mw_rcv.py b/gnuradio-examples/python/usrp/usrp_am_mw_rcv.py deleted file mode 100755 index 60f6c5825..000000000 --- a/gnuradio-examples/python/usrp/usrp_am_mw_rcv.py +++ /dev/null @@ -1,332 +0,0 @@ -#!/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, optfir -from gnuradio import audio -from gnuradio import usrp -from gnuradio import blks2 -from gnuradio.eng_option import eng_option -from gnuradio.wxgui import slider, powermate -from gnuradio.wxgui import stdgui2, fftsink2, form -from optparse import OptionParser -from usrpm import usrp_dbid -import sys -import math -import wx - -def pick_subdevice(u): - """ - The user didn't specify a subdevice on the command line. - Try for one of these, in order: BASIC_RX,TV_RX, BASIC_RX, whatever is on side A. - - @return a subdev_spec - """ - return usrp.pick_subdev(u, (usrp_dbid.BASIC_RX, - usrp_dbid.LF_RX, - usrp_dbid.TV_RX, - usrp_dbid.TV_RX_REV_2, - usrp_dbid.TV_RX_REV_3, - usrp_dbid.TV_RX_MIMO, - usrp_dbid.TV_RX_REV_2_MIMO, - usrp_dbid.TV_RX_REV_3_MIMO)) - - -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 USRP Rx side A or B (default=A)") - parser.add_option("-f", "--freq", type="eng_float", default=1008.0e3, - help="set frequency to FREQ", metavar="FREQ") - parser.add_option("-I", "--use-if-freq", action="store_true", default=False, - help="use intermediate freq (compensates DC problems in quadrature boards)" ) - parser.add_option("-g", "--gain", type="eng_float", default=None, - help="set gain in dB (default is maximum)") - 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.use_IF=options.use_if_freq - if self.use_IF: - self.IF_freq=64000.0 - else: - self.IF_freq=0.0 - - self.vol = 0 - self.state = "FREQ" - self.freq = 0 - - # build graph - - #TODO: add an AGC after the channel filter and before the AM_demod - - self.u = usrp.source_c() # usrp is data source - - adc_rate = self.u.adc_rate() # 64 MS/s - usrp_decim = 250 - self.u.set_decim_rate(usrp_decim) - usrp_rate = adc_rate / usrp_decim # 256 kS/s - chanfilt_decim = 4 - demod_rate = usrp_rate / chanfilt_decim # 64 kHz - audio_decimation = 2 - 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 - 8e3, # passband cutoff - 12e3, # stopband cutoff - 1.0, # passband ripple - 60) # stopband attenuation - #print len(chan_filt_coeffs) - self.chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs) - if self.use_IF: - # Turn If to baseband and filter. - self.chan_filt = gr.freq_xlating_fir_filter_ccf (chanfilt_decim, chan_filt_coeffs, self.IF_freq, usrp_rate) - else: - self.chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs) - self.am_demod = gr.complex_to_mag() - - self.volume_control = gr.multiply_const_ff(self.vol) - - audio_filt_coeffs = optfir.low_pass (1, # gain - demod_rate, # sampling rate - 8e3, # passband cutoff - 10e3, # stopband cutoff - 0.1, # passband ripple - 60) # stopband attenuation - self.audio_filt=gr.fir_filter_fff(audio_decimation,audio_filt_coeffs) - # 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, self.chan_filt, self.am_demod, self.audio_filt, self.volume_control, audio_sink) - - self._build_gui(vbox, usrp_rate, demod_rate, audio_rate) - - if options.gain is None: - g = self.subdev.gain_range() - if True: - # if no gain was specified, use the maximum gain available - # (usefull for Basic_RX which is relatively deaf and the most probable board to be used for AM) - # TODO: check db type to decide on default gain. - options.gain = float(g[1]) - else: - # if no gain was specified, use the mid-point in dB - options.gain = float(g[0]+g[1])/2 - - - if options.volume is None: - g = self.volume_range() - options.volume = float(g[0]*3+g[1])/4 - - if abs(options.freq) < 1e3: - options.freq *= 1e3 - - # 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") - - - def _set_status_msg(self, msg, which=0): - self.frame.GetStatusBar().SetStatusText(msg, which) - - - def _build_gui(self, vbox, usrp_rate, demod_rate, audio_rate): - - def _form_set_freq(kv): - return self.set_freq(kv['freq']) - - - if 1: - self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from USRP", - fft_size=512, sample_rate=usrp_rate, - ref_scale=32768.0, ref_level=0.0, y_divs=12) - self.connect (self.u, self.src_fft) - vbox.Add (self.src_fft.win, 4, wx.EXPAND) - - if 0: - self.post_filt_fft = fftsink2.fft_sink_c(self.panel, title="Post Channel filter", - fft_size=512, sample_rate=demod_rate) - self.connect (self.chan_filt, self.post_filt_fft) - vbox.Add (self.post_filt_fft.win, 4, wx.EXPAND) - - if 0: - post_demod_fft = fftsink2.fft_sink_f(self.panel, title="Post Demod", - fft_size=1024, sample_rate=demod_rate, - y_per_div=10, ref_level=0) - self.connect (self.am_demod, post_demod_fft) - vbox.Add (post_demod_fft.win, 4, wx.EXPAND) - - if 1: - audio_fft = fftsink2.fft_sink_f(self.panel, title="Audio", - fft_size=512, sample_rate=audio_rate, - y_per_div=10, ref_level=20) - self.connect (self.audio_filt, audio_fft) - vbox.Add (audio_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=(520.0e3, 1611.0e3, 1.0e3), - 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.subdev.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 = usrp.tune(self.u, 0, self.subdev, target_freq + self.IF_freq) - #TODO: check if db is inverting the spectrum or not to decide if we should do + self.IF_freq or - self.IF_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.subdev.set_gain(gain) - - def update_status_bar (self): - msg = "Volume:%r Setting:%s" % (self.vol, self.state) - self._set_status_msg(msg, 1) - try: - self.src_fft.set_baseband_freq(self.freq) - except: - None - - def volume_range(self): - return (-40.0, 0.0, 0.5) - - -if __name__ == '__main__': - app = stdgui2.stdapp (wfm_rx_block, "USRP Broadcast AM MW RX") - app.MainLoop () |