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#!/usr/bin/env python
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##################################################
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# Gnuradio Python Flow Graph
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# Title: Usrp Rx Hrpt Nogui
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# Generated: Mon Nov  9 08:03:25 2009
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##################################################
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from gnuradio import eng_notation
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from gnuradio import gr
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from gnuradio import noaa
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from gnuradio.eng_option import eng_option
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from gnuradio.gr import firdes
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from grc_gnuradio import usrp as grc_usrp
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from optparse import OptionParser
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import ConfigParser
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import math, os
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class usrp_rx_hrpt_nogui(gr.top_block):
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        def __init__(self):
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                gr.top_block.__init__(self, "Usrp Rx Hrpt Nogui")
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                ##################################################
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                # Variables
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                ##################################################
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                self.config_filename = config_filename = os.environ['HOME']+'/.gnuradio/config.conf'
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                self._decim_config = ConfigParser.ConfigParser()
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                self._decim_config.read(config_filename)
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                try: decim = self._decim_config.getfloat('usrp_rx_hrpt', 'decim')
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                except: decim = 32
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                self.decim = decim
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                self.sym_rate = sym_rate = 600*1109
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                self.sample_rate = sample_rate = 64e6/decim
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                self.sps = sps = sample_rate/sym_rate
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                self._side_config = ConfigParser.ConfigParser()
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                self._side_config.read(config_filename)
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                try: side = self._side_config.get('usrp_rx_hrpt', 'side')
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                except: side = 'A'
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                self.side = side
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                self._pll_alpha_config = ConfigParser.ConfigParser()
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                self._pll_alpha_config.read(config_filename)
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                try: pll_alpha = self._pll_alpha_config.getfloat('usrp_rx_hrpt', 'pll_alpha')
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                except: pll_alpha = 0.01
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                self.pll_alpha = pll_alpha
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                self._output_filename_config = ConfigParser.ConfigParser()
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                self._output_filename_config.read(config_filename)
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                try: output_filename = self._output_filename_config.get('usrp_rx_hrpt', 'filename')
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                except: output_filename = 'frames.hrpt'
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                self.output_filename = output_filename
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                self.max_clock_offset = max_clock_offset = 100e-6
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                self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate
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                self.hs = hs = int(sps/2.0)
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                self._gain_config = ConfigParser.ConfigParser()
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                self._gain_config.read(config_filename)
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                try: gain = self._gain_config.getfloat('usrp_rx_hrpt', 'gain')
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                except: gain = 35
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                self.gain = gain
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                self._freq_config = ConfigParser.ConfigParser()
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                self._freq_config.read(config_filename)
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                try: freq = self._freq_config.getfloat('usrp_rx_hrpt', 'freq')
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                except: freq = 1698e6
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                self.freq = freq
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                self._clock_alpha_config = ConfigParser.ConfigParser()
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                self._clock_alpha_config.read(config_filename)
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                try: clock_alpha = self._clock_alpha_config.getfloat('usrp_rx_hrpt', 'clock_alpha')
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                except: clock_alpha = 0.01
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                self.clock_alpha = clock_alpha
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                ##################################################
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                # Blocks
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                ##################################################
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                self.agc = gr.agc_cc(1e-6, 1.0, 1.0, 1.0)
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                self.decoder = noaa.hrpt_decoder(True,True)
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                self.deframer = noaa.hrpt_deframer()
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                self.frame_sink = gr.file_sink(gr.sizeof_short*1, output_filename)
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                self.gr_binary_slicer_fb_0 = gr.binary_slicer_fb()
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                self.gr_clock_recovery_mm_xx_0 = gr.clock_recovery_mm_ff(sps/2.0, clock_alpha**2/4.0, 0.5, clock_alpha, max_clock_offset)
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                self.gr_moving_average_xx_0 = gr.moving_average_ff(hs, 1.0/hs, 4000)
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                self.pll = noaa.hrpt_pll_cf(pll_alpha, pll_alpha**2/4.0, max_carrier_offset)
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                self.usrp_source = grc_usrp.simple_source_c(which=0, side=side, rx_ant="RXA")
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                self.usrp_source.set_decim_rate(decim)
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                self.usrp_source.set_frequency(freq, verbose=True)
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                self.usrp_source.set_gain(gain)
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                ##################################################
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                # Connections
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                ##################################################
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                self.connect((self.usrp_source, 0), (self.agc, 0))
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                self.connect((self.agc, 0), (self.pll, 0))
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                self.connect((self.pll, 0), (self.gr_moving_average_xx_0, 0))
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                self.connect((self.gr_moving_average_xx_0, 0), (self.gr_clock_recovery_mm_xx_0, 0))
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                self.connect((self.gr_clock_recovery_mm_xx_0, 0), (self.gr_binary_slicer_fb_0, 0))
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                self.connect((self.deframer, 0), (self.frame_sink, 0))
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                self.connect((self.deframer, 0), (self.decoder, 0))
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                self.connect((self.gr_binary_slicer_fb_0, 0), (self.deframer, 0))
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        def set_config_filename(self, config_filename):
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                self.config_filename = config_filename
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                self._gain_config = ConfigParser.ConfigParser()
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                self._gain_config.read(self.config_filename)
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                if not self._gain_config.has_section('usrp_rx_hrpt'):
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                        self._gain_config.add_section('usrp_rx_hrpt')
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                self._gain_config.set('usrp_rx_hrpt', 'gain', str(self.gain))
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                self._gain_config.write(open(self.config_filename, 'w'))
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                self._freq_config = ConfigParser.ConfigParser()
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                self._freq_config.read(self.config_filename)
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                if not self._freq_config.has_section('usrp_rx_hrpt'):
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                        self._freq_config.add_section('usrp_rx_hrpt')
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                self._freq_config.set('usrp_rx_hrpt', 'freq', str(self.freq))
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                self._freq_config.write(open(self.config_filename, 'w'))
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                self._side_config = ConfigParser.ConfigParser()
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                self._side_config.read(self.config_filename)
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                if not self._side_config.has_section('usrp_rx_hrpt'):
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                        self._side_config.add_section('usrp_rx_hrpt')
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                self._side_config.set('usrp_rx_hrpt', 'side', str(self.side))
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                self._side_config.write(open(self.config_filename, 'w'))
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                self._decim_config = ConfigParser.ConfigParser()
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                self._decim_config.read(self.config_filename)
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                if not self._decim_config.has_section('usrp_rx_hrpt'):
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                        self._decim_config.add_section('usrp_rx_hrpt')
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                self._decim_config.set('usrp_rx_hrpt', 'decim', str(self.decim))
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                self._decim_config.write(open(self.config_filename, 'w'))
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                self._pll_alpha_config = ConfigParser.ConfigParser()
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                self._pll_alpha_config.read(self.config_filename)
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                if not self._pll_alpha_config.has_section('usrp_rx_hrpt'):
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                        self._pll_alpha_config.add_section('usrp_rx_hrpt')
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                self._pll_alpha_config.set('usrp_rx_hrpt', 'pll_alpha', str(self.pll_alpha))
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                self._pll_alpha_config.write(open(self.config_filename, 'w'))
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                self._clock_alpha_config = ConfigParser.ConfigParser()
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                self._clock_alpha_config.read(self.config_filename)
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                if not self._clock_alpha_config.has_section('usrp_rx_hrpt'):
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                        self._clock_alpha_config.add_section('usrp_rx_hrpt')
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                self._clock_alpha_config.set('usrp_rx_hrpt', 'clock_alpha', str(self.clock_alpha))
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                self._clock_alpha_config.write(open(self.config_filename, 'w'))
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                self._output_filename_config = ConfigParser.ConfigParser()
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                self._output_filename_config.read(self.config_filename)
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                if not self._output_filename_config.has_section('usrp_rx_hrpt'):
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                        self._output_filename_config.add_section('usrp_rx_hrpt')
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                self._output_filename_config.set('usrp_rx_hrpt', 'filename', str(self.output_filename))
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                self._output_filename_config.write(open(self.config_filename, 'w'))
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        def set_decim(self, decim):
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                self.decim = decim
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                self.set_sample_rate(64e6/self.decim)
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                self.usrp_source.set_decim_rate(self.decim)
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                self._decim_config = ConfigParser.ConfigParser()
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                self._decim_config.read(self.config_filename)
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                if not self._decim_config.has_section('usrp_rx_hrpt'):
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                        self._decim_config.add_section('usrp_rx_hrpt')
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                self._decim_config.set('usrp_rx_hrpt', 'decim', str(self.decim))
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                self._decim_config.write(open(self.config_filename, 'w'))
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        def set_sym_rate(self, sym_rate):
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                self.sym_rate = sym_rate
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                self.set_sps(self.sample_rate/self.sym_rate)
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        def set_sample_rate(self, sample_rate):
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                self.sample_rate = sample_rate
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                self.set_max_carrier_offset(2*math.pi*100e3/self.sample_rate)
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                self.set_sps(self.sample_rate/self.sym_rate)
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        def set_sps(self, sps):
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                self.sps = sps
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                self.set_hs(int(self.sps/2.0))
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                self.gr_clock_recovery_mm_xx_0.set_omega(self.sps/2.0)
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        def set_side(self, side):
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                self.side = side
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                self._side_config = ConfigParser.ConfigParser()
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                self._side_config.read(self.config_filename)
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                if not self._side_config.has_section('usrp_rx_hrpt'):
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                        self._side_config.add_section('usrp_rx_hrpt')
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                self._side_config.set('usrp_rx_hrpt', 'side', str(self.side))
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                self._side_config.write(open(self.config_filename, 'w'))
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        def set_pll_alpha(self, pll_alpha):
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                self.pll_alpha = pll_alpha
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                self.pll.set_alpha(self.pll_alpha)
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                self.pll.set_beta(self.pll_alpha**2/4.0)
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                self._pll_alpha_config = ConfigParser.ConfigParser()
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                self._pll_alpha_config.read(self.config_filename)
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                if not self._pll_alpha_config.has_section('usrp_rx_hrpt'):
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                        self._pll_alpha_config.add_section('usrp_rx_hrpt')
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                self._pll_alpha_config.set('usrp_rx_hrpt', 'pll_alpha', str(self.pll_alpha))
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                self._pll_alpha_config.write(open(self.config_filename, 'w'))
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        def set_output_filename(self, output_filename):
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                self.output_filename = output_filename
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                self._output_filename_config = ConfigParser.ConfigParser()
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                self._output_filename_config.read(self.config_filename)
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                if not self._output_filename_config.has_section('usrp_rx_hrpt'):
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                        self._output_filename_config.add_section('usrp_rx_hrpt')
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                self._output_filename_config.set('usrp_rx_hrpt', 'filename', str(self.output_filename))
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                self._output_filename_config.write(open(self.config_filename, 'w'))
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        def set_max_clock_offset(self, max_clock_offset):
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                self.max_clock_offset = max_clock_offset
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        def set_max_carrier_offset(self, max_carrier_offset):
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                self.max_carrier_offset = max_carrier_offset
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                self.pll.set_max_offset(self.max_carrier_offset)
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        def set_hs(self, hs):
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                self.hs = hs
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                self.gr_moving_average_xx_0.set_length_and_scale(self.hs, 1.0/self.hs)
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        def set_gain(self, gain):
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                self.gain = gain
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                self._gain_config = ConfigParser.ConfigParser()
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                self._gain_config.read(self.config_filename)
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                if not self._gain_config.has_section('usrp_rx_hrpt'):
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                        self._gain_config.add_section('usrp_rx_hrpt')
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                self._gain_config.set('usrp_rx_hrpt', 'gain', str(self.gain))
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                self._gain_config.write(open(self.config_filename, 'w'))
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                self.usrp_source.set_gain(self.gain)
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        def set_freq(self, freq):
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                self.freq = freq
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                self._freq_config = ConfigParser.ConfigParser()
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                self._freq_config.read(self.config_filename)
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                if not self._freq_config.has_section('usrp_rx_hrpt'):
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                        self._freq_config.add_section('usrp_rx_hrpt')
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                self._freq_config.set('usrp_rx_hrpt', 'freq', str(self.freq))
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                self._freq_config.write(open(self.config_filename, 'w'))
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                self.usrp_source.set_frequency(self.freq)
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        def set_clock_alpha(self, clock_alpha):
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                self.clock_alpha = clock_alpha
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                self.gr_clock_recovery_mm_xx_0.set_gain_omega(self.clock_alpha**2/4.0)
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                self.gr_clock_recovery_mm_xx_0.set_gain_mu(self.clock_alpha)
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                self._clock_alpha_config = ConfigParser.ConfigParser()
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                self._clock_alpha_config.read(self.config_filename)
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                if not self._clock_alpha_config.has_section('usrp_rx_hrpt'):
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                        self._clock_alpha_config.add_section('usrp_rx_hrpt')
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                self._clock_alpha_config.set('usrp_rx_hrpt', 'clock_alpha', str(self.clock_alpha))
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                self._clock_alpha_config.write(open(self.config_filename, 'w'))
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if __name__ == '__main__':
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        parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
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        (options, args) = parser.parse_args()
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        if gr.enable_realtime_scheduling() != gr.RT_OK:
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                print "Error: failed to enable realtime scheduling."
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        tb = usrp_rx_hrpt_nogui()
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        tb.start()
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        raw_input('Press Enter to quit: ')
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        tb.stop()
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