--- /dev/null
+#!/usr/bin/env python
+##################################################
+# Gnuradio Python Flow Graph
+# Title: USRP HRPT Receiver
+# Generated: Sun Sep 27 10:13:25 2009
+##################################################
+
+from gnuradio import eng_notation
+from gnuradio import gr
+from gnuradio import noaa
+from gnuradio.eng_option import eng_option
+from gnuradio.gr import firdes
+from grc_gnuradio import usrp as grc_usrp
+from optparse import OptionParser
+import ConfigParser
+import math
+
+class usrp_rx_hrpt_nogui(gr.top_block):
+
+ def __init__(self):
+ gr.top_block.__init__(self, "USRP HRPT Receiver")
+
+ ##################################################
+ # Variables
+ ##################################################
+ self.config_filename = config_filename = 'usrp_rx_hrpt.cfg'
+ self._decim_config = ConfigParser.ConfigParser()
+ self._decim_config.read(config_filename)
+ try: decim = self._decim_config.getfloat('usrp', 'decim')
+ except: decim = 16
+ self.decim = decim
+ self.sym_rate = sym_rate = 600*1109
+ self.sample_rate = sample_rate = 64e6/decim
+ self.sps = sps = sample_rate/sym_rate
+ self.hs = hs = int(sps/2.0)
+ self._sync_alpha_config = ConfigParser.ConfigParser()
+ self._sync_alpha_config.read(config_filename)
+ try: sync_alpha = self._sync_alpha_config.getfloat('demod', 'sync_alpha')
+ except: sync_alpha = 0.05
+ self.sync_alpha = sync_alpha
+ self._side_config = ConfigParser.ConfigParser()
+ self._side_config.read(config_filename)
+ try: side = self._side_config.get('usrp', 'side')
+ except: side = 'A'
+ self.side = side
+ self._pll_alpha_config = ConfigParser.ConfigParser()
+ self._pll_alpha_config.read(config_filename)
+ try: pll_alpha = self._pll_alpha_config.getfloat('demod', 'pll_alpha')
+ except: pll_alpha = 0.05
+ self.pll_alpha = pll_alpha
+ self._output_filename_config = ConfigParser.ConfigParser()
+ self._output_filename_config.read(config_filename)
+ try: output_filename = self._output_filename_config.get('output', 'filename')
+ except: output_filename = 'frames.dat'
+ self.output_filename = output_filename
+ self.mf_taps = mf_taps = [-0.5/hs,]*hs+[0.5/hs,]*hs
+ self.max_sync_offset = max_sync_offset = 0.01
+ self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate
+ self._gain_config = ConfigParser.ConfigParser()
+ self._gain_config.read(config_filename)
+ try: gain = self._gain_config.getfloat('usrp', 'gain')
+ except: gain = 35
+ self.gain = gain
+ self._freq_config = ConfigParser.ConfigParser()
+ self._freq_config.read(config_filename)
+ try: freq = self._freq_config.getfloat('usrp', 'freq')
+ except: freq = 1698e6
+ self.freq = freq
+
+ ##################################################
+ # Blocks
+ ##################################################
+ self.agc = gr.agc_cc(1e-6, 1.0, 1.0, 1.0)
+ self.decoder = noaa.hrpt_decoder()
+ self.deframer = noaa.hrpt_deframer()
+ self.frame_sink = gr.file_sink(gr.sizeof_short*1, output_filename)
+ self.gr_fir_filter_xxx_0 = gr.fir_filter_ccc(1, (mf_taps))
+ self.pll = noaa.hrpt_pll_cf(pll_alpha, pll_alpha**2/4.0, max_carrier_offset)
+ self.sync = noaa.hrpt_sync_fb(sync_alpha, sync_alpha**2/4.0, sps, max_sync_offset)
+ self.usrp_source = grc_usrp.simple_source_c(which=0, side=side, rx_ant="RXA")
+ self.usrp_source.set_decim_rate(decim)
+ self.usrp_source.set_frequency(freq, verbose=True)
+ self.usrp_source.set_gain(gain)
+
+ ##################################################
+ # Connections
+ ##################################################
+ self.connect((self.usrp_source, 0), (self.agc, 0))
+ self.connect((self.deframer, 0), (self.decoder, 0))
+ self.connect((self.pll, 0), (self.sync, 0))
+ self.connect((self.sync, 0), (self.deframer, 0))
+ self.connect((self.deframer, 0), (self.frame_sink, 0))
+ self.connect((self.agc, 0), (self.gr_fir_filter_xxx_0, 0))
+ self.connect((self.gr_fir_filter_xxx_0, 0), (self.pll, 0))
+
+ def set_config_filename(self, config_filename):
+ self.config_filename = config_filename
+ self._output_filename_config = ConfigParser.ConfigParser()
+ self._output_filename_config.read(self.config_filename)
+ if not self._output_filename_config.has_section('output'):
+ self._output_filename_config.add_section('output')
+ self._output_filename_config.set('output', 'filename', str(self.output_filename))
+ self._output_filename_config.write(open(self.config_filename, 'w'))
+ self._sync_alpha_config = ConfigParser.ConfigParser()
+ self._sync_alpha_config.read(self.config_filename)
+ if not self._sync_alpha_config.has_section('demod'):
+ self._sync_alpha_config.add_section('demod')
+ self._sync_alpha_config.set('demod', 'sync_alpha', str(self.sync_alpha))
+ self._sync_alpha_config.write(open(self.config_filename, 'w'))
+ self._pll_alpha_config = ConfigParser.ConfigParser()
+ self._pll_alpha_config.read(self.config_filename)
+ if not self._pll_alpha_config.has_section('demod'):
+ self._pll_alpha_config.add_section('demod')
+ self._pll_alpha_config.set('demod', 'pll_alpha', str(self.pll_alpha))
+ self._pll_alpha_config.write(open(self.config_filename, 'w'))
+ self._gain_config = ConfigParser.ConfigParser()
+ self._gain_config.read(self.config_filename)
+ if not self._gain_config.has_section('usrp'):
+ self._gain_config.add_section('usrp')
+ self._gain_config.set('usrp', 'gain', str(self.gain))
+ self._gain_config.write(open(self.config_filename, 'w'))
+ self._freq_config = ConfigParser.ConfigParser()
+ self._freq_config.read(self.config_filename)
+ if not self._freq_config.has_section('usrp'):
+ self._freq_config.add_section('usrp')
+ self._freq_config.set('usrp', 'freq', str(self.freq))
+ self._freq_config.write(open(self.config_filename, 'w'))
+ self._decim_config = ConfigParser.ConfigParser()
+ self._decim_config.read(self.config_filename)
+ if not self._decim_config.has_section('usrp'):
+ self._decim_config.add_section('usrp')
+ self._decim_config.set('usrp', 'decim', str(self.decim))
+ self._decim_config.write(open(self.config_filename, 'w'))
+ self._side_config = ConfigParser.ConfigParser()
+ self._side_config.read(self.config_filename)
+ if not self._side_config.has_section('usrp'):
+ self._side_config.add_section('usrp')
+ self._side_config.set('usrp', 'side', str(self.side))
+ self._side_config.write(open(self.config_filename, 'w'))
+
+ def set_decim(self, decim):
+ self.decim = decim
+ self.set_sample_rate(64e6/self.decim)
+ self._decim_config = ConfigParser.ConfigParser()
+ self._decim_config.read(self.config_filename)
+ if not self._decim_config.has_section('usrp'):
+ self._decim_config.add_section('usrp')
+ self._decim_config.set('usrp', 'decim', str(self.decim))
+ self._decim_config.write(open(self.config_filename, 'w'))
+ self.usrp_source.set_decim_rate(self.decim)
+
+ def set_sym_rate(self, sym_rate):
+ self.sym_rate = sym_rate
+ self.set_sps(self.sample_rate/self.sym_rate)
+
+ def set_sample_rate(self, sample_rate):
+ self.sample_rate = sample_rate
+ self.set_max_carrier_offset(2*math.pi*100e3/self.sample_rate)
+ self.set_sps(self.sample_rate/self.sym_rate)
+
+ def set_sps(self, sps):
+ self.sps = sps
+ self.set_hs(int(self.sps/2.0))
+
+ def set_hs(self, hs):
+ self.hs = hs
+ self.set_mf_taps([-0.5/self.hs,]*self.hs+[0.5/self.hs,]*self.hs)
+
+ def set_sync_alpha(self, sync_alpha):
+ self.sync_alpha = sync_alpha
+ self._sync_alpha_config = ConfigParser.ConfigParser()
+ self._sync_alpha_config.read(self.config_filename)
+ if not self._sync_alpha_config.has_section('demod'):
+ self._sync_alpha_config.add_section('demod')
+ self._sync_alpha_config.set('demod', 'sync_alpha', str(self.sync_alpha))
+ self._sync_alpha_config.write(open(self.config_filename, 'w'))
+ self.sync.set_alpha(self.sync_alpha)
+ self.sync.set_beta(self.sync_alpha**2/4.0)
+
+ def set_side(self, side):
+ self.side = side
+ self._side_config = ConfigParser.ConfigParser()
+ self._side_config.read(self.config_filename)
+ if not self._side_config.has_section('usrp'):
+ self._side_config.add_section('usrp')
+ self._side_config.set('usrp', 'side', str(self.side))
+ self._side_config.write(open(self.config_filename, 'w'))
+
+ def set_pll_alpha(self, pll_alpha):
+ self.pll_alpha = pll_alpha
+ self._pll_alpha_config = ConfigParser.ConfigParser()
+ self._pll_alpha_config.read(self.config_filename)
+ if not self._pll_alpha_config.has_section('demod'):
+ self._pll_alpha_config.add_section('demod')
+ self._pll_alpha_config.set('demod', 'pll_alpha', str(self.pll_alpha))
+ self._pll_alpha_config.write(open(self.config_filename, 'w'))
+ self.pll.set_alpha(self.pll_alpha)
+ self.pll.set_beta(self.pll_alpha**2/4.0)
+
+ def set_output_filename(self, output_filename):
+ self.output_filename = output_filename
+ self._output_filename_config = ConfigParser.ConfigParser()
+ self._output_filename_config.read(self.config_filename)
+ if not self._output_filename_config.has_section('output'):
+ self._output_filename_config.add_section('output')
+ self._output_filename_config.set('output', 'filename', str(self.output_filename))
+ self._output_filename_config.write(open(self.config_filename, 'w'))
+
+ def set_mf_taps(self, mf_taps):
+ self.mf_taps = mf_taps
+ self.gr_fir_filter_xxx_0.set_taps((self.mf_taps))
+
+ def set_max_sync_offset(self, max_sync_offset):
+ self.max_sync_offset = max_sync_offset
+ self.sync.set_max_offset(self.max_sync_offset)
+
+ def set_max_carrier_offset(self, max_carrier_offset):
+ self.max_carrier_offset = max_carrier_offset
+ self.pll.set_max_offset(self.max_carrier_offset)
+
+ def set_gain(self, gain):
+ self.gain = gain
+ self._gain_config = ConfigParser.ConfigParser()
+ self._gain_config.read(self.config_filename)
+ if not self._gain_config.has_section('usrp'):
+ self._gain_config.add_section('usrp')
+ self._gain_config.set('usrp', 'gain', str(self.gain))
+ self._gain_config.write(open(self.config_filename, 'w'))
+ self.usrp_source.set_gain(self.gain)
+
+ def set_freq(self, freq):
+ self.freq = freq
+ self._freq_config = ConfigParser.ConfigParser()
+ self._freq_config.read(self.config_filename)
+ if not self._freq_config.has_section('usrp'):
+ self._freq_config.add_section('usrp')
+ self._freq_config.set('usrp', 'freq', str(self.freq))
+ self._freq_config.write(open(self.config_filename, 'w'))
+ self.usrp_source.set_frequency(self.freq)
+
+if __name__ == '__main__':
+ parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
+ (options, args) = parser.parse_args()
+ if gr.enable_realtime_scheduling() != gr.RT_OK:
+ print "Error: failed to enable realtime scheduling."
+ tb = usrp_rx_hrpt_nogui()
+ tb.start()
+ raw_input('Press Enter to quit: ')
+ tb.stop()
+
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