git.gag.com Git - debian/gnuradio/blob - gr-pager/src/usrp_flex_all.py

   1 #!/usr/bin/env python
   2
   3 from gnuradio import gr, gru, usrp, optfir, eng_notation, blks2, pager
   4 from gnuradio.eng_option import eng_option
   5 from optparse import OptionParser
   6 from string import split, join, printable
   7 import time
   8
   9 class app_top_block(gr.top_block):
  10     def __init__(self, options, queue):
  11         gr.top_block.__init__(self, "usrp_flex_all")
  12
  13         if options.from_file is not None:
  14             src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
  15             if options.verbose:
  16                 print "Reading samples from file", options.from_file
  17         else:
  18             src = usrp.source_c()
  19             if options.rx_subdev_spec is None:
  20                 options.rx_subdev_spec = usrp.pick_rx_subdevice(src)
  21             subdev = usrp.selected_subdev(src, options.rx_subdev_spec)
  22             src.set_mux(usrp.determine_rx_mux_value(src, options.rx_subdev_spec))
  23             src.set_decim_rate(20)
  24             result = usrp.tune(src, 0, subdev, 930.5e6+options.calibration)
  25             if options.verbose:
  26                 print "Using", subdev.name(), " for receiving."
  27                 print "Tuned USRP to", 930.5e6+options.calibration
  28
  29         taps = gr.firdes.low_pass(1.0,
  30                                   1.0,
  31                                   1.0/128.0*0.4,
  32                                   1.0/128.0*0.1,
  33                                   gr.firdes.WIN_HANN)
  34
  35         if options.verbose:
  36             print "Channel filter has", len(taps), "taps"
  37
  38         bank = blks2.analysis_filterbank(128, taps)
  39         self.connect(src, bank)
  40
  41         if options.log and options.from_file == None:
  42             src_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
  43             self.connect(src, src_sink)
  44
  45         for i in range(128):
  46             if i < 64:
  47                 freq = 930.5e6+i*25e3
  48             else:
  49                 freq = 928.9e6+(i-64)*25e3
  50
  51             if (freq < 929.0e6 or freq > 932.0e6):
  52                 self.connect((bank, i), gr.null_sink(gr.sizeof_gr_complex))
  53             else:
  54                 self.connect((bank, i), pager.flex_demod(queue, freq, options.verbose, options.log))
  55                 if options.log:
  56                     self.connect((bank, i), gr.file_sink(gr.sizeof_gr_complex, 'chan_'+'%3.3f'%(freq/1e6)+'.dat'))
  57
  58 def main():
  59     parser = OptionParser(option_class=eng_option)
  60     parser.add_option("-R", "--rx-subdev-spec", type="subdev",
  61                       help="select USRP Rx side A or B (default=first daughterboard found)")
  62     parser.add_option("-c", "--calibration", type="eng_float", default=0.0,
  63                       help="set frequency offset to Hz", metavar="Hz")
  64     parser.add_option("-g", "--gain", type="int",
  65                       help="set RF gain", metavar="dB")
  66     parser.add_option("-F", "--from-file", default=None,
  67                       help="Read from file instead of USRP")
  68     parser.add_option("-l", "--log", action="store_true", default=False,
  69                       help="log flowgraph to files (LOTS of data)")
  70     parser.add_option("-v", "--verbose", action="store_true", default=False,
  71                       help="display debug output")
  72     (options, args) = parser.parse_args()
  73
  74     if options.verbose:
  75         print options
  76
  77     queue = gr.msg_queue()
  78     tb = app_top_block(options, queue)
  79
  80     runner = pager.top_block_runner(tb)
  81     try:
  82         while 1:
  83             if not queue.empty_p():
  84                 msg = queue.delete_head() # Blocking read
  85                 page = join(split(msg.to_string(), chr(128)), '|')
  86                 s = pager.make_printable(page)
  87                 print s
  88             elif runner.done:
  89                 break
  90             else:
  91                 time.sleep(0.05)
  92
  93     except KeyboardInterrupt:
  94         tb.stop()
  95         runner = None
  96
  97 if __name__ == "__main__":
  98     main()