Vadim Yanitskiy | 180a037 | 2019-01-19 10:22:59 +0700 | [diff] [blame] | 1 | #!/usr/bin/env python2 |
| 2 | # -*- coding: utf-8 -*- |
| 3 | |
| 4 | # GR-GSM based transceiver |
| 5 | # Transceiver implementation |
| 6 | # |
| 7 | # (C) 2018-2019 by Vadim Yanitskiy <axilirator@gmail.com> |
| 8 | # |
| 9 | # All Rights Reserved |
| 10 | # |
| 11 | # This program is free software; you can redistribute it and/or modify |
| 12 | # it under the terms of the GNU General Public License as published by |
| 13 | # the Free Software Foundation; either version 2 of the License, or |
| 14 | # (at your option) any later version. |
| 15 | # |
| 16 | # This program is distributed in the hope that it will be useful, |
| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | # GNU General Public License for more details. |
| 20 | # |
| 21 | # You should have received a copy of the GNU General Public License along |
| 22 | # with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 24 | |
Vasil Velichkov | 46c90be | 2019-09-02 04:06:41 +0300 | [diff] [blame] | 25 | from .ctrl_if_bb import CTRLInterfaceBB |
Vadim Yanitskiy | 180a037 | 2019-01-19 10:22:59 +0700 | [diff] [blame] | 26 | |
| 27 | class Transceiver: |
| 28 | """ Base transceiver implementation. |
| 29 | |
| 30 | Represents a single transceiver, that can be used as for the BTS side, |
| 31 | as for the MS side. Each individual instance of Transceiver unifies |
| 32 | three basic interfaces built on three independent UDP connections: |
| 33 | |
| 34 | - CLCK (base port + 100/0) - clock indications from TRX to L1, |
| 35 | - CTRL (base port + 101/1) - control interface for L1, |
| 36 | - DATA (base port + 102/2) - bidirectional data interface for bursts. |
| 37 | |
| 38 | A transceiver can be either in active (i.e. working), or in idle mode. |
| 39 | |
| 40 | NOTE: both CLCK and DATA interfaces are handled by the flow-graph, |
| 41 | (see RadioInterface), so we only initialize CTRL interface. |
| 42 | |
| 43 | """ |
| 44 | |
| 45 | def __init__(self, bind_addr, remote_addr, base_port, radio_if): |
| 46 | # Connection info |
| 47 | self.remote_addr = remote_addr |
| 48 | self.bind_addr = bind_addr |
| 49 | self.base_port = base_port |
| 50 | |
| 51 | # Execution state (running or idle) |
| 52 | self.running = False |
| 53 | |
| 54 | # Radio interface (handles both CLCK and DATA interfaces) |
| 55 | self.radio_if = radio_if |
| 56 | |
| 57 | # Init CTRL interface |
| 58 | self.ctrl_if = CTRLInterfaceBB(self, |
| 59 | remote_addr, base_port + 101, |
| 60 | bind_addr, base_port + 1) |
| 61 | |
| 62 | def start(self): |
| 63 | # Check execution state |
| 64 | if self.running: |
| 65 | print("[!] Transceiver is already started") |
| 66 | return False |
| 67 | |
| 68 | # Make sure that Radio interface is ready, i.e. |
| 69 | # all parameters (e.g. RX / RX freq) are set. |
| 70 | if not self.radio_if.ready: |
| 71 | print("[!] RadioInterface is not ready") |
| 72 | return False |
| 73 | |
| 74 | print("[i] Starting transceiver...") |
| 75 | self.radio_if.start() |
| 76 | self.running = True |
| 77 | |
| 78 | return True |
| 79 | |
| 80 | def stop(self): |
| 81 | # POWEROFF is also used to reset transceiver, |
| 82 | # so we should not complain that it isn't running. |
| 83 | if not self.running: |
| 84 | print("[i] Resetting transceiver") |
| 85 | self.radio_if.reset() |
| 86 | return |
| 87 | |
| 88 | print("[i] Stopping transceiver...") |
| 89 | |
| 90 | # TODO: flush all buffers between blocks |
| 91 | self.radio_if.stop() |
| 92 | self.radio_if.wait() |
| 93 | |
| 94 | self.running = False |
| 95 | |
| 96 | def measure(self, freq): |
| 97 | # TODO: transceiver should be in idle mode |
| 98 | return self.radio_if.measure(freq) |