Moved trx utilities from apps subdirectory - the grgsm_trx app need to be updated
diff --git a/python/trx/radio_if.py b/python/trx/radio_if.py
new file mode 100644
index 0000000..c162f69
--- /dev/null
+++ b/python/trx/radio_if.py
@@ -0,0 +1,175 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based transceiver
+# Follow graph implementation
+#
+# (C) 2016-2017 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 pmt
+import time
+import grgsm
+import osmosdr
+
+from math import pi
+
+from gnuradio import blocks
+from gnuradio import gr
+
+class RadioInterface(gr.top_block):
+ # PHY specific variables
+ samp_rate = 2000000
+ shiftoff = 400e3
+ subdev_spec = "" # TODO: use it
+ device_args = ""
+ fc = 941.6e6 # TODO: set ARFCN to 0?
+ gain = 30
+ ppm = 0
+
+ # Application state flags
+ trx_started = False
+ fc_set = False
+
+ def __init__(self, phy_args, phy_subdev_spec,
+ phy_sample_rate, phy_gain, phy_ppm,
+ trx_remote_addr, trx_base_port):
+ print("[i] Init Radio interface")
+
+ # TRX block specific variables
+ self.trx_remote_addr = trx_remote_addr
+ self.trx_base_port = trx_base_port
+
+ # PHY specific variables
+ self.subdev_spec = phy_subdev_spec
+ self.samp_rate = phy_sample_rate
+ self.device_args = phy_args
+ self.gain = phy_gain
+ self.ppm = phy_ppm
+
+ gr.top_block.__init__(self, "GR-GSM TRX")
+ shift_fc = self.fc - self.shiftoff
+
+ ##################################################
+ # PHY Definition
+ ##################################################
+ self.phy = osmosdr.source(
+ args = "numchan=%d %s" % (1, self.device_args))
+
+ self.phy.set_bandwidth(250e3 + abs(self.shiftoff), 0)
+ self.phy.set_center_freq(shift_fc, 0)
+ self.phy.set_sample_rate(self.samp_rate)
+ self.phy.set_freq_corr(self.ppm, 0)
+ self.phy.set_iq_balance_mode(2, 0)
+ self.phy.set_dc_offset_mode(2, 0)
+ self.phy.set_gain_mode(False, 0)
+ self.phy.set_gain(self.gain, 0)
+ self.phy.set_if_gain(20, 0)
+ self.phy.set_bb_gain(20, 0)
+ self.phy.set_antenna("", 0)
+
+ ##################################################
+ # GR-GSM Magic
+ ##################################################
+ self.blocks_rotator = blocks.rotator_cc(
+ -2 * pi * self.shiftoff / self.samp_rate)
+
+ self.gsm_input = grgsm.gsm_input(
+ ppm = self.ppm, osr = 4, fc = self.fc,
+ samp_rate_in = self.samp_rate)
+
+ self.gsm_receiver = grgsm.receiver(4, ([0]), ([]))
+
+ self.gsm_clck_ctrl = grgsm.clock_offset_control(
+ shift_fc, self.samp_rate, osr = 4)
+
+ self.gsm_trx_if = grgsm.trx(self.trx_remote_addr,
+ str(self.trx_base_port))
+
+ ##################################################
+ # Connections
+ ##################################################
+ self.connect((self.phy, 0), (self.blocks_rotator, 0))
+ self.connect((self.blocks_rotator, 0), (self.gsm_input, 0))
+ self.connect((self.gsm_input, 0), (self.gsm_receiver, 0))
+
+ self.msg_connect((self.gsm_receiver, 'measurements'),
+ (self.gsm_clck_ctrl, 'measurements'))
+
+ self.msg_connect((self.gsm_clck_ctrl, 'ctrl'),
+ (self.gsm_input, 'ctrl_in'))
+
+ self.msg_connect((self.gsm_receiver, 'C0'),
+ (self.gsm_trx_if, 'bursts'))
+
+ def check_available(self):
+ return self.fc_set
+
+ def shutdown(self):
+ print("[i] Shutdown Radio interface")
+ self.stop()
+ self.wait()
+
+ def get_args(self):
+ return self.args
+
+ def set_args(self, args):
+ self.args = args
+
+ def get_fc(self):
+ return self.fc
+
+ def set_fc(self, fc):
+ self.phy.set_center_freq(fc - self.shiftoff, 0)
+ self.gsm_input.set_fc(fc)
+ self.fc_set = True
+ self.fc = fc
+
+ def get_gain(self):
+ return self.gain
+
+ def set_gain(self, gain):
+ self.phy.set_gain(gain, 0)
+ self.gain = gain
+
+ def get_ppm(self):
+ return self.ppm
+
+ def set_ppm(self, ppm):
+ self.rtlsdr_source_0.set_freq_corr(ppm, 0)
+ self.ppm = ppm
+
+ def get_samp_rate(self):
+ return self.samp_rate
+
+ def set_samp_rate(self, samp_rate):
+ self.blocks_rotator.set_phase_inc(
+ -2 * pi * self.shiftoff / samp_rate)
+ self.gsm_input.set_samp_rate_in(samp_rate)
+ self.phy.set_sample_rate(samp_rate)
+ self.samp_rate = samp_rate
+
+ def get_shiftoff(self):
+ return self.shiftoff
+
+ def set_shiftoff(self, shiftoff):
+ self.blocks_rotator.set_phase_inc(
+ -2 * pi * shiftoff / self.samp_rate)
+ self.phy.set_bandwidth(250e3 + abs(shiftoff), 0)
+ self.phy.set_center_freq(self.fc - shiftoff, 0)
+ self.shiftoff = shiftoff