apps/grgsm_trx: introduce initial LMS driver support
Change-Id: Ie983b10d1814906b6e659213f865e58d0f5c08e4
diff --git a/python/trx/radio_if_lms.py b/python/trx/radio_if_lms.py
new file mode 100644
index 0000000..b9d771a
--- /dev/null
+++ b/python/trx/radio_if_lms.py
@@ -0,0 +1,69 @@
+#!/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)