| #!/usr/bin/env python |
| ################################################## |
| # Gnuradio Python Flow Graph |
| # Title: Clock offset corrector |
| # Author: Piotr Krysik |
| # Generated: Wed Nov 19 08:38:40 2014 |
| ################################################## |
| |
| from gnuradio import blocks |
| from gnuradio import gr |
| from gnuradio.filter import firdes |
| import grgsm |
| import math |
| |
| class clock_offset_corrector(grgsm.hier_block): |
| |
| def __init__(self, fc=936.6e6, ppm=0, samp_rate_in=1625000.0/6.0*4.0): |
| grgsm.hier_block.__init__( |
| self, "Clock offset corrector", |
| gr.io_signature(1, 1, gr.sizeof_gr_complex*1), |
| gr.io_signature(1, 1, gr.sizeof_gr_complex*1), |
| ) |
| self.message_port_register_hier_in("ppm_in") |
| |
| ################################################## |
| # Parameters |
| ################################################## |
| self.fc = fc |
| self.ppm = ppm |
| self.samp_rate_in = samp_rate_in |
| |
| ################################################## |
| # Variables |
| ################################################## |
| self.samp_rate_out = samp_rate_out = samp_rate_in |
| |
| ################################################## |
| # Blocks |
| ################################################## |
| self.gsm_controlled_rotator_cc_0 = grgsm.controlled_rotator_cc(0,samp_rate_out) |
| self.gsm_controlled_const_source_f_0 = grgsm.controlled_const_source_f(ppm) |
| self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((fc/samp_rate_out*(2*math.pi)/1e6, )) |
| |
| ################################################## |
| # Connections |
| ################################################## |
| self.msg_connect((self, 'ppm_in'), (self.gsm_controlled_const_source_f_0, 'constant_msg')) |
| self.connect((self.blocks_multiply_const_vxx_0, 0), (self.gsm_controlled_rotator_cc_0, 1)) |
| self.connect((self.gsm_controlled_const_source_f_0, 0), (self.blocks_multiply_const_vxx_0, 0)) |
| self.connect((self.gsm_controlled_rotator_cc_0, 0), (self, 0)) |
| self.connect((self, 0), (self.gsm_controlled_rotator_cc_0, 0)) |
| |
| def get_fc(self): |
| return self.fc |
| |
| def set_fc(self, fc): |
| self.fc = fc |
| self.blocks_multiply_const_vxx_0.set_k((self.fc/self.samp_rate_out*(2*math.pi)/1e6, )) |
| |
| def get_ppm(self): |
| return self.ppm |
| |
| def set_ppm(self, ppm): |
| self.ppm = ppm |
| self.gsm_controlled_const_source_f_0.set_constant(self.ppm) |
| |
| def get_samp_rate_in(self): |
| return self.samp_rate_in |
| |
| def set_samp_rate_in(self, samp_rate_in): |
| self.samp_rate_in = samp_rate_in |
| self.set_samp_rate_out(self.samp_rate_in) |
| |
| def get_samp_rate_out(self): |
| return self.samp_rate_out |
| |
| def set_samp_rate_out(self, samp_rate_out): |
| self.samp_rate_out = samp_rate_out |
| self.gsm_controlled_rotator_cc_0.set_samp_rate(self.samp_rate_out) |
| self.blocks_multiply_const_vxx_0.set_k((self.fc/self.samp_rate_out*(2*math.pi)/1e6, )) |