summaryrefslogtreecommitdiff
path: root/src/python/gsm_findfcch_usrp.py
diff options
context:
space:
mode:
Diffstat (limited to 'src/python/gsm_findfcch_usrp.py')
-rwxr-xr-xsrc/python/gsm_findfcch_usrp.py122
1 files changed, 0 insertions, 122 deletions
diff --git a/src/python/gsm_findfcch_usrp.py b/src/python/gsm_findfcch_usrp.py
deleted file mode 100755
index 7bf81f3..0000000
--- a/src/python/gsm_findfcch_usrp.py
+++ /dev/null
@@ -1,122 +0,0 @@
-#!/usr/bin/env python
-#!/usr/bin/env python
-
-from gnuradio import gr, gru, blks2
-from gnuradio import usrp
-#from gnuradio import gsm
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-from os import sys
-#"""
-for extdir in ['../../debug/src/lib','../../debug/src/lib/.libs']:
- if extdir not in sys.path:
- sys.path.append(extdir)
-import gsm
-#"""
-def pick_subdevice(u):
- if u.db[0][0].dbid() >= 0:
- return (0, 0)
- if u.db[1][0].dbid() >= 0:
- return (1, 0)
- return (0, 0)
-
-class gsm_receiver_first_blood(gr.top_block):
- def __init__(self):
- gr.top_block.__init__(self)
- ( self.options, self.args) = self._przetworz_opcje()
- self._ustaw_taktowanie()
- self.zrodlo = self._ustaw_zrodlo()
- self.filtr = self._ustaw_filtr()
- self.interpolator = self._ustaw_interpolator()
- self.odbiornik = self._ustaw_odbiornik()
- self.konwerter = self._ustaw_konwerter()
- self.ujscie = self._ustaw_ujscie()
-
- self.connect(self.zrodlo, self.filtr, self.interpolator, self.odbiornik, self.konwerter, self.ujscie)
-# self.connect(self.zrodlo, self.ujscie)
-
- def _ustaw_ujscie(self):
- nazwa_pliku_wy = self.options.outputfile
- ujscie = gr.file_sink(gr.sizeof_float, nazwa_pliku_wy)
- return ujscie
-
- def _ustaw_zrodlo(self):
- options = self.options
- fusb_block_size = gr.prefs().get_long('fusb', 'block_size', 4096)
- fusb_nblocks = gr.prefs().get_long('fusb', 'nblocks', 16)
- self.usrp = usrp.source_c(decim_rate=options.decim, fusb_block_size=fusb_block_size, fusb_nblocks=fusb_nblocks)
-
- if options.rx_subdev_spec is None:
- options.rx_subdev_spec = pick_subdevice(self.usrp)
-
- self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, options.rx_subdev_spec))
- # determine the daughterboard subdevice
- self.subdev = usrp.selected_subdev(self.usrp, options.rx_subdev_spec)
- input_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
-
- # set initial values
- if options.gain is None:
- # if no gain was specified, use the mid-point in dB
- g = self.subdev.gain_range()
- options.gain = float(g[0]+g[1])/2
-
- r = self.usrp.tune(0, self.subdev, options.freq)
- self.subdev.set_gain(options.gain)
- return self.usrp
-
- def _ustaw_taktowanie(self):
- options = self.options
- clock_rate = 64e6
- self.clock_rate = clock_rate
- self.input_rate = clock_rate / options.decim
- self.gsm_symb_rate = 1625000.0 / 6.0
- self.sps = self.input_rate / self.gsm_symb_rate
-
- def _ustaw_filtr(self):
- filter_cutoff = 145e3
- filter_t_width = 10e3
- offset = 0
- print "input_rate:", self.input_rate, "sample rate:", self.sps, " filter_cutoff:", filter_cutoff, " filter_t_width:", filter_t_width
- filter_taps = gr.firdes.low_pass(1.0, self.input_rate, filter_cutoff, filter_t_width, gr.firdes.WIN_HAMMING)
- filtr = gr.freq_xlating_fir_filter_ccf(1, filter_taps, offset, self.input_rate)
- return filtr
-
- def _ustaw_konwerter(self):
- v2s = gr.vector_to_stream(gr.sizeof_float, 142)
- return v2s
-
- def _ustaw_interpolator(self):
- interpolator = gr.fractional_interpolator_cc(0, self.sps)
- return interpolator
-
- def _ustaw_odbiornik(self):
- odbiornik = gsm.receiver_cf(1)
- return odbiornik
-
- def _przetworz_opcje(self):
- parser = OptionParser(option_class=eng_option)
- parser.add_option("-d", "--decim", type="int", default=128,
- help="Set USRP decimation rate to DECIM [default=%default]")
- parser.add_option("-I", "--inputfile", type="string", default="cfile",
- help="Input filename")
- parser.add_option("-O", "--outputfile", type="string", default="cfile2.out",
- help="Output filename")
- parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
- help="Select USRP Rx side A or B (default=first one with a daughterboard)")
- parser.add_option("-f", "--freq", type="eng_float", default="950.4M",
- 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)")
- (options, args) = parser.parse_args ()
- return (options, args)
-
-def main():
- try:
- gsm_receiver_first_blood().run()
- except KeyboardInterrupt:
- pass
-
-if __name__ == '__main__':
- main()
-
-
personal git repositories of Harald Welte. Your mileage may vary