| #!/usr/bin/env python2 |
| # -*- coding: utf-8 -*- |
| |
| # GR-GSM based transceiver |
| # Radio interface for UHD devices |
| # |
| # (C) 2019 by Vadim Yanitskiy <axilirator@gmail.com> |
| # |
| # All Rights Reserved |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License along |
| # with this program; if not, write to the Free Software Foundation, Inc., |
| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| |
| from gnuradio import uhd |
| |
| from .radio_if import RadioInterface |
| |
| class RadioInterfaceUHD(RadioInterface): |
| # Human-readable description |
| def __str__(self): |
| return "UHD" |
| |
| @property |
| def phy_proc_delay(self): |
| # FIXME: shall be measured (automatically?) for |
| # particular device and particular clock rate. |
| # The current value is measured for USRP B2X0 at 26e6. |
| return (285.616 + 2 * self.GSM_SYM_PERIOD_uS) * 1e-6 |
| |
| def phy_init_source(self): |
| self._phy_src = uhd.usrp_source(self.phy_args, |
| uhd.stream_args(cpu_format = "fc32", |
| channels = range(1))) |
| |
| self._phy_src.set_clock_rate(26e6, uhd.ALL_MBOARDS) |
| self._phy_src.set_antenna(self.rx_antenna, 0) |
| self._phy_src.set_samp_rate(self.sample_rate) |
| self._phy_src.set_bandwidth(650e3, 0) |
| self._phy_src.set_gain(self.rx_gain) |
| |
| # Some UHD devices (such as UmTRX) do start the clock |
| # not from 0, so it's required to reset it manually. |
| # Resetting UHD source will also affect the sink. |
| self._phy_src.set_time_now(uhd.time_spec(0.0)) |
| |
| def phy_init_sink(self): |
| self._phy_sink = uhd.usrp_sink(self.phy_args, |
| uhd.stream_args(cpu_format = "fc32", |
| channels = range(1)), "packet_len") |
| |
| self._phy_sink.set_clock_rate(26e6, uhd.ALL_MBOARDS) |
| self._phy_sink.set_antenna(self.tx_antenna, 0) |
| self._phy_sink.set_samp_rate(self.sample_rate) |
| self._phy_sink.set_gain(self.tx_gain) |
| |
| def phy_set_rx_freq(self, freq): |
| self._phy_src.set_center_freq(freq, 0) |
| |
| def phy_set_tx_freq(self, freq): |
| self._phy_sink.set_center_freq(freq, 0) |
| |
| def phy_set_rx_gain(self, gain): |
| self._phy_src.set_gain(gain, 0) |
| |
| def phy_set_tx_gain(self, gain): |
| self._phy_sink.set_gain(gain, 0) |