99 lines
2.9 KiB
Python
99 lines
2.9 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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# GR-GSM based transceiver
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# Transceiver implementation
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#
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# (C) 2018-2019 by Vadim Yanitskiy <axilirator@gmail.com>
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#
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# All Rights Reserved
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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from ctrl_if_bb import CTRLInterfaceBB
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class Transceiver:
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""" Base transceiver implementation.
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Represents a single transceiver, that can be used as for the BTS side,
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as for the MS side. Each individual instance of Transceiver unifies
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three basic interfaces built on three independent UDP connections:
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- CLCK (base port + 100/0) - clock indications from TRX to L1,
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- CTRL (base port + 101/1) - control interface for L1,
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- DATA (base port + 102/2) - bidirectional data interface for bursts.
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A transceiver can be either in active (i.e. working), or in idle mode.
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NOTE: both CLCK and DATA interfaces are handled by the flow-graph,
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(see RadioInterface), so we only initialize CTRL interface.
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"""
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def __init__(self, bind_addr, remote_addr, base_port, radio_if):
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# Connection info
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self.remote_addr = remote_addr
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self.bind_addr = bind_addr
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self.base_port = base_port
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# Execution state (running or idle)
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self.running = False
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# Radio interface (handles both CLCK and DATA interfaces)
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self.radio_if = radio_if
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# Init CTRL interface
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self.ctrl_if = CTRLInterfaceBB(self,
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remote_addr, base_port + 101,
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bind_addr, base_port + 1)
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def start(self):
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# Check execution state
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if self.running:
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print("[!] Transceiver is already started")
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return False
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# Make sure that Radio interface is ready, i.e.
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# all parameters (e.g. RX / RX freq) are set.
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if not self.radio_if.ready:
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print("[!] RadioInterface is not ready")
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return False
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print("[i] Starting transceiver...")
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self.radio_if.start()
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self.running = True
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return True
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def stop(self):
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# POWEROFF is also used to reset transceiver,
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# so we should not complain that it isn't running.
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if not self.running:
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print("[i] Resetting transceiver")
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self.radio_if.reset()
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return
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print("[i] Stopping transceiver...")
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# TODO: flush all buffers between blocks
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self.radio_if.stop()
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self.radio_if.wait()
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self.running = False
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def measure(self, freq):
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# TODO: transceiver should be in idle mode
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return self.radio_if.measure(freq)
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