piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | ################################################## |
| 3 | # Gnuradio Python Flow Graph |
| 4 | # Title: Clock offset corrector |
| 5 | # Author: Piotr Krysik |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 6 | # Generated: Wed Aug 13 16:43:12 2014 |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 7 | ################################################## |
| 8 | |
| 9 | from gnuradio import blocks |
| 10 | from gnuradio import filter |
| 11 | from gnuradio import gr |
| 12 | from gnuradio.filter import firdes |
| 13 | import gsm |
| 14 | import math |
| 15 | |
| 16 | class clock_offset_corrector(gr.hier_block2): |
| 17 | |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 18 | def __init__(self, fc=936.6e6, ppm=0, samp_rate_in=1625000.0/6.0*4.0, samp_rate_out=1625000.0/6.0*4.0): |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 19 | gr.hier_block2.__init__( |
| 20 | self, "Clock offset corrector", |
| 21 | gr.io_signature(1, 1, gr.sizeof_gr_complex*1), |
| 22 | gr.io_signature(1, 1, gr.sizeof_gr_complex*1), |
| 23 | ) |
| 24 | |
| 25 | ################################################## |
| 26 | # Parameters |
| 27 | ################################################## |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 28 | self.fc = fc |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 29 | self.ppm = ppm |
| 30 | self.samp_rate_in = samp_rate_in |
| 31 | self.samp_rate_out = samp_rate_out |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 32 | |
| 33 | ################################################## |
| 34 | # Blocks |
| 35 | ################################################## |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 36 | self.ppm_in = None;self.message_port_register_hier_out("ppm_in") |
| 37 | self.gsm_controlled_rotator_cc_0 = gsm.controlled_rotator_cc(0,samp_rate_out) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 38 | self.gsm_controlled_const_source_f_0 = gsm.controlled_const_source_f(ppm) |
| 39 | self.fractional_resampler_xx_0 = filter.fractional_resampler_cc(0, 1) |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 40 | self.blocks_multiply_const_vxx_0_0 = blocks.multiply_const_vff((1.0e-6*samp_rate_in/samp_rate_out, )) |
| 41 | self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((fc/samp_rate_out*(2*math.pi)/1e6, )) |
| 42 | self.blocks_add_const_vxx_0 = blocks.add_const_vff((samp_rate_in/samp_rate_out, )) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 43 | |
| 44 | ################################################## |
| 45 | # Connections |
| 46 | ################################################## |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 47 | self.connect((self.blocks_add_const_vxx_0, 0), (self.fractional_resampler_xx_0, 1)) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 48 | self.connect((self.blocks_multiply_const_vxx_0, 0), (self.gsm_controlled_rotator_cc_0, 1)) |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 49 | self.connect((self.fractional_resampler_xx_0, 0), (self.gsm_controlled_rotator_cc_0, 0)) |
| 50 | self.connect((self.gsm_controlled_rotator_cc_0, 0), (self, 0)) |
| 51 | self.connect((self, 0), (self.fractional_resampler_xx_0, 0)) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 52 | self.connect((self.blocks_multiply_const_vxx_0_0, 0), (self.blocks_add_const_vxx_0, 0)) |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 53 | self.connect((self.gsm_controlled_const_source_f_0, 0), (self.blocks_multiply_const_vxx_0_0, 0)) |
| 54 | self.connect((self.gsm_controlled_const_source_f_0, 0), (self.blocks_multiply_const_vxx_0, 0)) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 55 | |
| 56 | ################################################## |
| 57 | # Asynch Message Connections |
| 58 | ################################################## |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 59 | self.msg_connect(self, "ppm_in", self.gsm_controlled_const_source_f_0, "constant_msg") |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 60 | |
| 61 | |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 62 | def get_fc(self): |
| 63 | return self.fc |
| 64 | |
| 65 | def set_fc(self, fc): |
| 66 | self.fc = fc |
| 67 | self.blocks_multiply_const_vxx_0.set_k((self.fc/self.samp_rate_out*(2*math.pi)/1e6, )) |
| 68 | |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 69 | def get_ppm(self): |
| 70 | return self.ppm |
| 71 | |
| 72 | def set_ppm(self, ppm): |
| 73 | self.ppm = ppm |
| 74 | self.gsm_controlled_const_source_f_0.set_constant(self.ppm) |
| 75 | |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 76 | def get_samp_rate_in(self): |
| 77 | return self.samp_rate_in |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 78 | |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 79 | def set_samp_rate_in(self, samp_rate_in): |
| 80 | self.samp_rate_in = samp_rate_in |
| 81 | self.blocks_add_const_vxx_0.set_k((self.samp_rate_in/self.samp_rate_out, )) |
| 82 | self.blocks_multiply_const_vxx_0_0.set_k((1.0e-6*self.samp_rate_in/self.samp_rate_out, )) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 83 | |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 84 | def get_samp_rate_out(self): |
| 85 | return self.samp_rate_out |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 86 | |
Piotr K | 66bb3cd | 2014-08-13 19:04:57 +0200 | [diff] [blame^] | 87 | def set_samp_rate_out(self, samp_rate_out): |
| 88 | self.samp_rate_out = samp_rate_out |
| 89 | self.blocks_multiply_const_vxx_0.set_k((self.fc/self.samp_rate_out*(2*math.pi)/1e6, )) |
| 90 | self.blocks_add_const_vxx_0.set_k((self.samp_rate_in/self.samp_rate_out, )) |
| 91 | self.blocks_multiply_const_vxx_0_0.set_k((1.0e-6*self.samp_rate_in/self.samp_rate_out, )) |
| 92 | self.gsm_controlled_rotator_cc_0.set_samp_rate(self.samp_rate_out) |
piotr | 4089c1a | 2014-08-06 14:10:56 +0200 | [diff] [blame] | 93 | |