2 ##################################################
3 # Gnuradio Python Flow Graph
4 # Title: USRP HRPT Receiver
5 # Generated: Sun Sep 27 10:13:25 2009
6 ##################################################
8 from gnuradio import eng_notation
9 from gnuradio import gr
10 from gnuradio import noaa
11 from gnuradio.eng_option import eng_option
12 from gnuradio.gr import firdes
13 from grc_gnuradio import usrp as grc_usrp
14 from optparse import OptionParser
18 class usrp_rx_hrpt_nogui(gr.top_block):
21 gr.top_block.__init__(self, "USRP HRPT Receiver")
23 ##################################################
25 ##################################################
26 self.config_filename = config_filename = 'usrp_rx_hrpt.cfg'
27 self._decim_config = ConfigParser.ConfigParser()
28 self._decim_config.read(config_filename)
29 try: decim = self._decim_config.getfloat('usrp', 'decim')
32 self.sym_rate = sym_rate = 600*1109
33 self.sample_rate = sample_rate = 64e6/decim
34 self.sps = sps = sample_rate/sym_rate
35 self.hs = hs = int(sps/2.0)
36 self._sync_alpha_config = ConfigParser.ConfigParser()
37 self._sync_alpha_config.read(config_filename)
38 try: sync_alpha = self._sync_alpha_config.getfloat('demod', 'sync_alpha')
39 except: sync_alpha = 0.05
40 self.sync_alpha = sync_alpha
41 self._side_config = ConfigParser.ConfigParser()
42 self._side_config.read(config_filename)
43 try: side = self._side_config.get('usrp', 'side')
46 self._pll_alpha_config = ConfigParser.ConfigParser()
47 self._pll_alpha_config.read(config_filename)
48 try: pll_alpha = self._pll_alpha_config.getfloat('demod', 'pll_alpha')
49 except: pll_alpha = 0.05
50 self.pll_alpha = pll_alpha
51 self._output_filename_config = ConfigParser.ConfigParser()
52 self._output_filename_config.read(config_filename)
53 try: output_filename = self._output_filename_config.get('output', 'filename')
54 except: output_filename = 'frames.dat'
55 self.output_filename = output_filename
56 self.mf_taps = mf_taps = [-0.5/hs,]*hs+[0.5/hs,]*hs
57 self.max_sync_offset = max_sync_offset = 0.01
58 self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate
59 self._gain_config = ConfigParser.ConfigParser()
60 self._gain_config.read(config_filename)
61 try: gain = self._gain_config.getfloat('usrp', 'gain')
64 self._freq_config = ConfigParser.ConfigParser()
65 self._freq_config.read(config_filename)
66 try: freq = self._freq_config.getfloat('usrp', 'freq')
70 ##################################################
72 ##################################################
73 self.agc = gr.agc_cc(1e-6, 1.0, 1.0, 1.0)
74 self.decoder = noaa.hrpt_decoder()
75 self.deframer = noaa.hrpt_deframer()
76 self.frame_sink = gr.file_sink(gr.sizeof_short*1, output_filename)
77 self.gr_fir_filter_xxx_0 = gr.fir_filter_ccc(1, (mf_taps))
78 self.pll = noaa.hrpt_pll_cf(pll_alpha, pll_alpha**2/4.0, max_carrier_offset)
79 self.sync = noaa.hrpt_sync_fb(sync_alpha, sync_alpha**2/4.0, sps, max_sync_offset)
80 self.usrp_source = grc_usrp.simple_source_c(which=0, side=side, rx_ant="RXA")
81 self.usrp_source.set_decim_rate(decim)
82 self.usrp_source.set_frequency(freq, verbose=True)
83 self.usrp_source.set_gain(gain)
85 ##################################################
87 ##################################################
88 self.connect((self.usrp_source, 0), (self.agc, 0))
89 self.connect((self.deframer, 0), (self.decoder, 0))
90 self.connect((self.pll, 0), (self.sync, 0))
91 self.connect((self.sync, 0), (self.deframer, 0))
92 self.connect((self.deframer, 0), (self.frame_sink, 0))
93 self.connect((self.agc, 0), (self.gr_fir_filter_xxx_0, 0))
94 self.connect((self.gr_fir_filter_xxx_0, 0), (self.pll, 0))
96 def set_config_filename(self, config_filename):
97 self.config_filename = config_filename
98 self._output_filename_config = ConfigParser.ConfigParser()
99 self._output_filename_config.read(self.config_filename)
100 if not self._output_filename_config.has_section('output'):
101 self._output_filename_config.add_section('output')
102 self._output_filename_config.set('output', 'filename', str(self.output_filename))
103 self._output_filename_config.write(open(self.config_filename, 'w'))
104 self._sync_alpha_config = ConfigParser.ConfigParser()
105 self._sync_alpha_config.read(self.config_filename)
106 if not self._sync_alpha_config.has_section('demod'):
107 self._sync_alpha_config.add_section('demod')
108 self._sync_alpha_config.set('demod', 'sync_alpha', str(self.sync_alpha))
109 self._sync_alpha_config.write(open(self.config_filename, 'w'))
110 self._pll_alpha_config = ConfigParser.ConfigParser()
111 self._pll_alpha_config.read(self.config_filename)
112 if not self._pll_alpha_config.has_section('demod'):
113 self._pll_alpha_config.add_section('demod')
114 self._pll_alpha_config.set('demod', 'pll_alpha', str(self.pll_alpha))
115 self._pll_alpha_config.write(open(self.config_filename, 'w'))
116 self._gain_config = ConfigParser.ConfigParser()
117 self._gain_config.read(self.config_filename)
118 if not self._gain_config.has_section('usrp'):
119 self._gain_config.add_section('usrp')
120 self._gain_config.set('usrp', 'gain', str(self.gain))
121 self._gain_config.write(open(self.config_filename, 'w'))
122 self._freq_config = ConfigParser.ConfigParser()
123 self._freq_config.read(self.config_filename)
124 if not self._freq_config.has_section('usrp'):
125 self._freq_config.add_section('usrp')
126 self._freq_config.set('usrp', 'freq', str(self.freq))
127 self._freq_config.write(open(self.config_filename, 'w'))
128 self._decim_config = ConfigParser.ConfigParser()
129 self._decim_config.read(self.config_filename)
130 if not self._decim_config.has_section('usrp'):
131 self._decim_config.add_section('usrp')
132 self._decim_config.set('usrp', 'decim', str(self.decim))
133 self._decim_config.write(open(self.config_filename, 'w'))
134 self._side_config = ConfigParser.ConfigParser()
135 self._side_config.read(self.config_filename)
136 if not self._side_config.has_section('usrp'):
137 self._side_config.add_section('usrp')
138 self._side_config.set('usrp', 'side', str(self.side))
139 self._side_config.write(open(self.config_filename, 'w'))
141 def set_decim(self, decim):
143 self.set_sample_rate(64e6/self.decim)
144 self._decim_config = ConfigParser.ConfigParser()
145 self._decim_config.read(self.config_filename)
146 if not self._decim_config.has_section('usrp'):
147 self._decim_config.add_section('usrp')
148 self._decim_config.set('usrp', 'decim', str(self.decim))
149 self._decim_config.write(open(self.config_filename, 'w'))
150 self.usrp_source.set_decim_rate(self.decim)
152 def set_sym_rate(self, sym_rate):
153 self.sym_rate = sym_rate
154 self.set_sps(self.sample_rate/self.sym_rate)
156 def set_sample_rate(self, sample_rate):
157 self.sample_rate = sample_rate
158 self.set_max_carrier_offset(2*math.pi*100e3/self.sample_rate)
159 self.set_sps(self.sample_rate/self.sym_rate)
161 def set_sps(self, sps):
163 self.set_hs(int(self.sps/2.0))
165 def set_hs(self, hs):
167 self.set_mf_taps([-0.5/self.hs,]*self.hs+[0.5/self.hs,]*self.hs)
169 def set_sync_alpha(self, sync_alpha):
170 self.sync_alpha = sync_alpha
171 self._sync_alpha_config = ConfigParser.ConfigParser()
172 self._sync_alpha_config.read(self.config_filename)
173 if not self._sync_alpha_config.has_section('demod'):
174 self._sync_alpha_config.add_section('demod')
175 self._sync_alpha_config.set('demod', 'sync_alpha', str(self.sync_alpha))
176 self._sync_alpha_config.write(open(self.config_filename, 'w'))
177 self.sync.set_alpha(self.sync_alpha)
178 self.sync.set_beta(self.sync_alpha**2/4.0)
180 def set_side(self, side):
182 self._side_config = ConfigParser.ConfigParser()
183 self._side_config.read(self.config_filename)
184 if not self._side_config.has_section('usrp'):
185 self._side_config.add_section('usrp')
186 self._side_config.set('usrp', 'side', str(self.side))
187 self._side_config.write(open(self.config_filename, 'w'))
189 def set_pll_alpha(self, pll_alpha):
190 self.pll_alpha = pll_alpha
191 self._pll_alpha_config = ConfigParser.ConfigParser()
192 self._pll_alpha_config.read(self.config_filename)
193 if not self._pll_alpha_config.has_section('demod'):
194 self._pll_alpha_config.add_section('demod')
195 self._pll_alpha_config.set('demod', 'pll_alpha', str(self.pll_alpha))
196 self._pll_alpha_config.write(open(self.config_filename, 'w'))
197 self.pll.set_alpha(self.pll_alpha)
198 self.pll.set_beta(self.pll_alpha**2/4.0)
200 def set_output_filename(self, output_filename):
201 self.output_filename = output_filename
202 self._output_filename_config = ConfigParser.ConfigParser()
203 self._output_filename_config.read(self.config_filename)
204 if not self._output_filename_config.has_section('output'):
205 self._output_filename_config.add_section('output')
206 self._output_filename_config.set('output', 'filename', str(self.output_filename))
207 self._output_filename_config.write(open(self.config_filename, 'w'))
209 def set_mf_taps(self, mf_taps):
210 self.mf_taps = mf_taps
211 self.gr_fir_filter_xxx_0.set_taps((self.mf_taps))
213 def set_max_sync_offset(self, max_sync_offset):
214 self.max_sync_offset = max_sync_offset
215 self.sync.set_max_offset(self.max_sync_offset)
217 def set_max_carrier_offset(self, max_carrier_offset):
218 self.max_carrier_offset = max_carrier_offset
219 self.pll.set_max_offset(self.max_carrier_offset)
221 def set_gain(self, gain):
223 self._gain_config = ConfigParser.ConfigParser()
224 self._gain_config.read(self.config_filename)
225 if not self._gain_config.has_section('usrp'):
226 self._gain_config.add_section('usrp')
227 self._gain_config.set('usrp', 'gain', str(self.gain))
228 self._gain_config.write(open(self.config_filename, 'w'))
229 self.usrp_source.set_gain(self.gain)
231 def set_freq(self, freq):
233 self._freq_config = ConfigParser.ConfigParser()
234 self._freq_config.read(self.config_filename)
235 if not self._freq_config.has_section('usrp'):
236 self._freq_config.add_section('usrp')
237 self._freq_config.set('usrp', 'freq', str(self.freq))
238 self._freq_config.write(open(self.config_filename, 'w'))
239 self.usrp_source.set_frequency(self.freq)
241 if __name__ == '__main__':
242 parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
243 (options, args) = parser.parse_args()
244 if gr.enable_realtime_scheduling() != gr.RT_OK:
245 print "Error: failed to enable realtime scheduling."
246 tb = usrp_rx_hrpt_nogui()
248 raw_input('Press Enter to quit: ')