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Diffstat (limited to 'gr-uhd/examples/python/fm_tx4.py')
| -rwxr-xr-x | gr-uhd/examples/python/fm_tx4.py | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/gr-uhd/examples/python/fm_tx4.py b/gr-uhd/examples/python/fm_tx4.py deleted file mode 100755 index f412ffb5d..000000000 --- a/gr-uhd/examples/python/fm_tx4.py +++ /dev/null @@ -1,208 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 2005-2007,2011 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. -# - -""" -Transmit N simultaneous narrow band FM signals. - -They will be centered at the frequency specified on the command line, -and will spaced at 25kHz steps from there. - -The program opens N files with names audio-N.dat where N is in [0,7]. -These files should contain floating point audio samples in the range [-1,1] -sampled at 32kS/sec. You can create files like this using -audio_to_file.py -""" - -from gnuradio import gr, eng_notation -from gnuradio import uhd -from gnuradio import blks2 -from gnuradio.eng_option import eng_option -from optparse import OptionParser -import math -import sys - -from gnuradio.wxgui import stdgui2, fftsink2 -import wx - - -######################################################## -# instantiate one transmit chain for each call - -class pipeline(gr.hier_block2): - def __init__(self, filename, lo_freq, audio_rate, if_rate): - - gr.hier_block2.__init__(self, "pipeline", - gr.io_signature(0, 0, 0), - gr.io_signature(1, 1, gr.sizeof_gr_complex)) - - try: - src = gr.file_source (gr.sizeof_float, filename, True) - except RuntimeError: - sys.stderr.write(("\nError: Could not open file '%s'\n\n" % \ - filename)) - sys.exit(1) - - print audio_rate, if_rate - fmtx = blks2.nbfm_tx (audio_rate, if_rate, max_dev=5e3, tau=75e-6) - - # Local oscillator - lo = gr.sig_source_c (if_rate, # sample rate - gr.GR_SIN_WAVE, # waveform type - lo_freq, #frequency - 1.0, # amplitude - 0) # DC Offset - mixer = gr.multiply_cc () - - self.connect (src, fmtx, (mixer, 0)) - self.connect (lo, (mixer, 1)) - self.connect (mixer, self) - -class fm_tx_block(stdgui2.std_top_block): - def __init__(self, frame, panel, vbox, argv): - MAX_CHANNELS = 7 - stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv) - - parser = OptionParser (option_class=eng_option) - parser.add_option("-a", "--args", type="string", default="", - help="UHD device address args [default=%default]") - parser.add_option("", "--spec", type="string", default=None, - help="Subdevice of UHD device where appropriate") - 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=400e3, - 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("-n", "--nchannels", type="int", default=4, - help="number of Tx channels [1,4]") - #parser.add_option("","--debug", action="store_true", default=False, - # help="Launch Tx debugger") - (options, args) = parser.parse_args () - - if len(args) != 0: - parser.print_help() - sys.exit(1) - - if options.nchannels < 1 or options.nchannels > MAX_CHANNELS: - sys.stderr.write ("fm_tx4: nchannels out of range. Must be in [1,%d]\n" % MAX_CHANNELS) - sys.exit(1) - - if options.freq is None: - sys.stderr.write("fm_tx4: must specify frequency with -f FREQ\n") - parser.print_help() - sys.exit(1) - - # ---------------------------------------------------------------- - # Set up constants and parameters - - self.u = uhd.usrp_sink(device_addr=options.args, stream_args=uhd.stream_args('fc32')) - - # Set the subdevice spec - if(options.spec): - self.u.set_subdev_spec(options.spec, 0) - - # Set the antenna - if(options.antenna): - self.u.set_antenna(options.antenna, 0) - - self.usrp_rate = options.samp_rate - self.u.set_samp_rate(self.usrp_rate) - self.usrp_rate = self.u.get_samp_rate() - - self.sw_interp = 10 - self.audio_rate = self.usrp_rate / self.sw_interp # 32 kS/s - - 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 - - self.set_gain(options.gain) - self.set_freq(options.freq) - - self.sum = gr.add_cc () - - # Instantiate N NBFM channels - step = 25e3 - offset = (0 * step, 1 * step, -1 * step, - 2 * step, -2 * step, 3 * step, -3 * step) - - for i in range (options.nchannels): - t = pipeline("audio-%d.dat" % (i % 4), offset[i], - self.audio_rate, self.usrp_rate) - self.connect(t, (self.sum, i)) - - self.gain = gr.multiply_const_cc (1.0 / options.nchannels) - - # connect it all - self.connect (self.sum, self.gain) - self.connect (self.gain, self.u) - - # plot an FFT to verify we are sending what we want - if 1: - post_mod = fftsink2.fft_sink_c(panel, title="Post Modulation", - fft_size=512, - sample_rate=self.usrp_rate, - y_per_div=20, - ref_level=40) - self.connect (self.gain, post_mod) - vbox.Add (post_mod.win, 1, wx.EXPAND) - - - #if options.debug: - # self.debugger = tx_debug_gui.tx_debug_gui(self.subdev) - # self.debugger.Show(True) - - - 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 up converter. Finally, we feed - any residual_freq to the s/w freq translater. - """ - - r = self.u.set_center_freq(target_freq, 0) - if r: - print "Frequency =", eng_notation.num_to_str(self.u.get_center_freq()) - return True - - return False - - def set_gain(self, gain): - self.u.set_gain(gain, 0) - - -def main (): - app = stdgui2.stdapp(fm_tx_block, "Multichannel FM Tx", nstatus=1) - app.MainLoop () - -if __name__ == '__main__': - main () |