import sys
# from current dir
-from receive_path import receive_path
-from pick_bitrate import pick_rx_bitrate
-import usrp_options
+import usrp_receive_path
#import os
#print os.getpid()
def __init__(self, demodulator, rx_callback, options):
gr.top_block.__init__(self)
- self._rx_freq = options.rx_freq # receiver's center frequency
- self._rx_gain = options.rx_gain # receiver's gain
- self._decim = options.decim # Decimating rate for the USRP (prelim)
- self._bitrate = options.bitrate
- self._samples_per_symbol = options.samples_per_symbol
- self._demod_class = demodulator
-
- if self._rx_freq is None:
- sys.stderr.write("-f FREQ or --freq FREQ or --rx-freq FREQ must be specified\n")
- raise SystemExit
-
- # Set up USRP source
- self._setup_usrp_source(options)
-
- # copy the final answers back into options for use by demodulator
- options.samples_per_symbol = self._samples_per_symbol
- options.bitrate = self._bitrate
- options.decim = self._decim
-
- ok = self.set_freq(self._rx_freq)
- if not ok:
- print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(self._rx_freq))
- raise ValueError, eng_notation.num_to_str(self._rx_freq)
-
- self.set_gain(options.rx_gain)
- self.set_auto_tr(True) # enable Auto Transmit/Receive switching
-
# Set up receive path
- self.rxpath = receive_path(demodulator, rx_callback, options)
-
- self.connect(self.u, self.rxpath)
-
- def _setup_usrp_source(self, options):
- self.u = usrp_options.create_usrp_source(options)
- adc_rate = self.u.adc_rate()
-
- self.u.set_decim(self._decim)
-
- (self._bitrate, self._samples_per_symbol, self._decim) = \
- pick_rx_bitrate(self._bitrate, self._demod_class.bits_per_symbol(), \
- self._samples_per_symbol, self._decim, adc_rate, \
- self.u.get_decim_rates())
-
- self.u.set_decim(self._decim)
-
-
- 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.
- """
- return self.u.set_center_freq(target_freq)
-
- def set_gain(self, gain):
- """
- Sets the analog gain in the USRP
- """
- if gain is None:
- r = self.u.gain_range()
- gain = (r[0] + r[1])/2 # set gain to midpoint
- self.gain = gain
- return self.u.set_gain(gain)
-
- def set_auto_tr(self, enable):
- return self.u.set_auto_tr(enable)
-
- def decim(self):
- return self._decim
-
- def add_options(normal, expert):
- """
- Adds usrp-specific options to the Options Parser
- """
- add_freq_option(normal)
- normal.add_option("-v", "--verbose", action="store_true", default=False)
-
- expert.add_option("", "--rx-freq", type="eng_float", default=None,
- help="set Rx frequency to FREQ [default=%default]", metavar="FREQ")
-
-
- # Make a static method to call before instantiation
- add_options = staticmethod(add_options)
-
-
-def add_freq_option(parser):
- """
- Hackery that has the -f / --freq option set both tx_freq and rx_freq
- """
- def freq_callback(option, opt_str, value, parser):
- parser.values.rx_freq = value
- parser.values.tx_freq = value
-
- if not parser.has_option('--freq'):
- parser.add_option('-f', '--freq', type="eng_float",
- action="callback", callback=freq_callback,
- help="set Tx and/or Rx frequency to FREQ [default=%default]",
- metavar="FREQ")
+ self.rxpath = usrp_receive_path.usrp_receive_path(demodulator, rx_callback, options)
+ self.connect(self.rxpath)
# /////////////////////////////////////////////////////////////////////////////
# main
help="Select modulation from: %s [default=%%default]"
% (', '.join(demods.keys()),))
- my_top_block.add_options(parser, expert_grp)
- receive_path.add_options(parser, expert_grp)
- usrp_options.add_rx_options(parser)
+ usrp_receive_path.add_options(parser, expert_grp)
for mod in demods.values():
mod.add_options(expert_grp)
projects / debian / gnuradio / blobdiff