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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
# GR-GSM based transceiver
# Radio interface for Lime 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.
import limesdr
from radio_if import RadioInterface
class RadioInterfaceLMS(RadioInterface):
lms_len_tag_name = "packet_len"
lms_dev_serial = ""
lms_dev_ch_mode = 1
# Human-readable description
def __str__(self):
return "LMS"
@property # Signal processing delay of PHY
def phy_proc_delay(self):
# FIXME: the current value is measured for USRP B2X0 at 26e6,
# we should measure it for LimeSDR separately!
return (285.616 + 2 * self.GSM_SYM_PERIOD_uS) * 1e-6
def phy_init_source(self):
self._phy_src = limesdr.source(self.lms_dev_serial,
self.lms_dev_ch_mode, "")
self._phy_src.set_sample_rate(self.sample_rate)
self._phy_src.set_gain(self.rx_gain, 0)
def phy_init_sink(self):
self._phy_sink = limesdr.sink(self.lms_dev_serial,
self.lms_dev_ch_mode, "",
self.lms_len_tag_name)
self._phy_sink.set_sample_rate(self.sample_rate)
self._phy_sink.set_gain(self.tx_gain, 0)
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)
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