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#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: USRP HRPT Receiver
# Generated: Thu Oct 27 13:48:25 2011
##################################################
from gnuradio import digital
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 optparse import OptionParser
import ConfigParser
import math, os
class file_rx_hrpt(gr.top_block):
def __init__(self):
gr.top_block.__init__(self, "USRP HRPT Receiver")
##################################################
# Variables
##################################################
self.sym_rate = sym_rate = 600*1109
self.sample_rate = sample_rate = 4e6
self.sps = sps = sample_rate/sym_rate
self.config_filename = config_filename = os.environ['HOME']+'/.gnuradio/config.conf'
self._pll_alpha_config = ConfigParser.ConfigParser()
self._pll_alpha_config.read(config_filename)
try: pll_alpha = self._pll_alpha_config.getfloat('usrp_rx_hrpt', 'pll_alpha')
except: pll_alpha = 0.01
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('usrp_rx_hrpt', 'filename')
except: output_filename = 'frames.hrpt'
self.output_filename = output_filename
self.max_clock_offset = max_clock_offset = 100e-6
self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate
self.hs = hs = int(sps/2.0)
self._gain_config = ConfigParser.ConfigParser()
self._gain_config.read(config_filename)
try: gain = self._gain_config.getfloat('usrp_rx_hrpt', '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_rx_hrpt', 'freq')
except: freq = 1698e6
self.freq = freq
self._clock_alpha_config = ConfigParser.ConfigParser()
self._clock_alpha_config.read(config_filename)
try: clock_alpha = self._clock_alpha_config.getfloat('usrp_rx_hrpt', 'clock_alpha')
except: clock_alpha = 0.01
self.clock_alpha = clock_alpha
##################################################
# Blocks
##################################################
self.throttle = gr.throttle(gr.sizeof_short*1, 2*sample_rate)
self.pll = noaa.hrpt_pll_cf(pll_alpha, pll_alpha**2/4.0, max_carrier_offset)
self.gr_moving_average_xx_0 = gr.moving_average_ff(hs, 1.0/hs, 4000)
self.gr_interleaved_short_to_complex_0 = gr.interleaved_short_to_complex()
self.gr_file_source_0 = gr.file_source(gr.sizeof_short*1, "input_filename", False)
self.frame_sink = gr.file_sink(gr.sizeof_short*1, output_filename)
self.frame_sink.set_unbuffered(False)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(sps/2.0, clock_alpha**2/4.0, 0.5, clock_alpha, max_clock_offset)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.deframer = noaa.hrpt_deframer()
self.decoder = noaa.hrpt_decoder(True,True)
self.agc = gr.agc_cc(1e-6, 1.0, 1.0, 1.0)
##################################################
# Connections
##################################################
self.connect((self.gr_moving_average_xx_0, 0), (self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self.pll, 0), (self.gr_moving_average_xx_0, 0))
self.connect((self.agc, 0), (self.pll, 0))
self.connect((self.deframer, 0), (self.decoder, 0))
self.connect((self.deframer, 0), (self.frame_sink, 0))
self.connect((self.gr_interleaved_short_to_complex_0, 0), (self.agc, 0))
self.connect((self.throttle, 0), (self.gr_interleaved_short_to_complex_0, 0))
self.connect((self.gr_file_source_0, 0), (self.throttle, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.deframer, 0))
def get_sym_rate(self):
return self.sym_rate
def set_sym_rate(self, sym_rate):
self.sym_rate = sym_rate
self.set_sps(self.sample_rate/self.sym_rate)
def get_sample_rate(self):
return self.sample_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 get_sps(self):
return self.sps
def set_sps(self, sps):
self.sps = sps
self.set_hs(int(self.sps/2.0))
self.digital_clock_recovery_mm_xx_0.set_omega(self.sps/2.0)
def get_config_filename(self):
return self.config_filename
def set_config_filename(self, config_filename):
self.config_filename = config_filename
self._freq_config = ConfigParser.ConfigParser()
self._freq_config.read(self.config_filename)
if not self._freq_config.has_section('usrp_rx_hrpt'):
self._freq_config.add_section('usrp_rx_hrpt')
self._freq_config.set('usrp_rx_hrpt', 'freq', str(self.freq))
self._freq_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_rx_hrpt'):
self._gain_config.add_section('usrp_rx_hrpt')
self._gain_config.set('usrp_rx_hrpt', 'gain', str(self.gain))
self._gain_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('usrp_rx_hrpt'):
self._pll_alpha_config.add_section('usrp_rx_hrpt')
self._pll_alpha_config.set('usrp_rx_hrpt', 'pll_alpha', str(self.pll_alpha))
self._pll_alpha_config.write(open(self.config_filename, 'w'))
self._clock_alpha_config = ConfigParser.ConfigParser()
self._clock_alpha_config.read(self.config_filename)
if not self._clock_alpha_config.has_section('usrp_rx_hrpt'):
self._clock_alpha_config.add_section('usrp_rx_hrpt')
self._clock_alpha_config.set('usrp_rx_hrpt', 'clock_alpha', str(self.clock_alpha))
self._clock_alpha_config.write(open(self.config_filename, 'w'))
self._output_filename_config = ConfigParser.ConfigParser()
self._output_filename_config.read(self.config_filename)
if not self._output_filename_config.has_section('usrp_rx_hrpt'):
self._output_filename_config.add_section('usrp_rx_hrpt')
self._output_filename_config.set('usrp_rx_hrpt', 'filename', str(self.output_filename))
self._output_filename_config.write(open(self.config_filename, 'w'))
def get_pll_alpha(self):
return self.pll_alpha
def set_pll_alpha(self, pll_alpha):
self.pll_alpha = pll_alpha
self.pll.set_alpha(self.pll_alpha)
self.pll.set_beta(self.pll_alpha**2/4.0)
self._pll_alpha_config = ConfigParser.ConfigParser()
self._pll_alpha_config.read(self.config_filename)
if not self._pll_alpha_config.has_section('usrp_rx_hrpt'):
self._pll_alpha_config.add_section('usrp_rx_hrpt')
self._pll_alpha_config.set('usrp_rx_hrpt', 'pll_alpha', str(self.pll_alpha))
self._pll_alpha_config.write(open(self.config_filename, 'w'))
def get_output_filename(self):
return self.output_filename
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('usrp_rx_hrpt'):
self._output_filename_config.add_section('usrp_rx_hrpt')
self._output_filename_config.set('usrp_rx_hrpt', 'filename', str(self.output_filename))
self._output_filename_config.write(open(self.config_filename, 'w'))
def get_max_clock_offset(self):
return self.max_clock_offset
def set_max_clock_offset(self, max_clock_offset):
self.max_clock_offset = max_clock_offset
def get_max_carrier_offset(self):
return self.max_carrier_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 get_hs(self):
return self.hs
def set_hs(self, hs):
self.hs = hs
self.gr_moving_average_xx_0.set_length_and_scale(self.hs, 1.0/self.hs)
def get_gain(self):
return self.gain
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_rx_hrpt'):
self._gain_config.add_section('usrp_rx_hrpt')
self._gain_config.set('usrp_rx_hrpt', 'gain', str(self.gain))
self._gain_config.write(open(self.config_filename, 'w'))
def get_freq(self):
return self.freq
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_rx_hrpt'):
self._freq_config.add_section('usrp_rx_hrpt')
self._freq_config.set('usrp_rx_hrpt', 'freq', str(self.freq))
self._freq_config.write(open(self.config_filename, 'w'))
def get_clock_alpha(self):
return self.clock_alpha
def set_clock_alpha(self, clock_alpha):
self.clock_alpha = clock_alpha
self.digital_clock_recovery_mm_xx_0.set_gain_omega(self.clock_alpha**2/4.0)
self.digital_clock_recovery_mm_xx_0.set_gain_mu(self.clock_alpha)
self._clock_alpha_config = ConfigParser.ConfigParser()
self._clock_alpha_config.read(self.config_filename)
if not self._clock_alpha_config.has_section('usrp_rx_hrpt'):
self._clock_alpha_config.add_section('usrp_rx_hrpt')
self._clock_alpha_config.set('usrp_rx_hrpt', 'clock_alpha', str(self.clock_alpha))
self._clock_alpha_config.write(open(self.config_filename, 'w'))
if __name__ == '__main__':
parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
(options, args) = parser.parse_args()
tb = file_rx_hrpt()
tb.start()
raw_input('Press Enter to quit: ')
tb.stop()
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