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# -*- coding: utf-8 -*-
#
# DPD Calculation Engine: updates ODR-DabMod's predistortion block.
#
# http://www.opendigitalradio.org
# Licence: The MIT License, see notice at the end of this file
"""
This module is used to change settings of ODR-DabMod using
the ZMQ remote control socket.
"""
import zmq
import logging
import numpy as np
class Adapt:
"""Uses the ZMQ remote control to change parameters of the DabMod
Parameters
----------
port : int
Port at which the ODR-DabMod is listening to connect the
ZMQ remote control.
"""
def __init__(self, port, coef_path):
logging.debug("Instantiate Adapt object")
self.port = port
self.coef_path = coef_path
self.host = "localhost"
self._context = zmq.Context()
def _connect(self):
"""Establish the connection to ODR-DabMod using
a ZMQ socket that is in request mode (Client).
Returns a socket"""
sock = self._context.socket(zmq.REQ)
sock.connect("tcp://%s:%d" % (self.host, self.port))
sock.send(b"ping")
data = [el.decode() for el in sock.recv_multipart()]
if data != ['ok']:
raise RuntimeError(
"Could not ping server at %s %d: %s" %
(self.host, self.port, data))
return sock
def send_receive(self, message):
"""Send a message to ODR-DabMod. It always
returns the answer ODR-DabMod sends back.
An example message could be
"get uhd txgain" or "set uhd txgain 50"
Parameter
---------
message : str
The message string that will be sent to the receiver.
"""
sock = self._connect()
logging.debug("Send message: %s" % message)
msg_parts = message.split(" ")
for i, part in enumerate(msg_parts):
if i == len(msg_parts) - 1:
f = 0
else:
f = zmq.SNDMORE
sock.send(part.encode(), flags=f)
data = [el.decode() for el in sock.recv_multipart()]
logging.debug("Received message: %s" % message)
return data
def set_txgain(self, gain):
"""Set a new txgain for the ODR-DabMod.
Parameters
----------
gain : int
new TX gain, in the same format as ODR-DabMod's config file
"""
# TODO this is specific to the B200
if gain < 0 or gain > 89:
raise ValueError("Gain has to be in [0,89]")
return self.send_receive("set uhd txgain %.4f" % float(gain))
def get_txgain(self):
"""Get the txgain value in dB for the ODR-DabMod."""
# TODO handle failure
return float(self.send_receive("get uhd txgain")[0])
def set_rxgain(self, gain):
"""Set a new rxgain for the ODR-DabMod.
Parameters
----------
gain : int
new RX gain, in the same format as ODR-DabMod's config file
"""
# TODO this is specific to the B200
if gain < 0 or gain > 89:
raise ValueError("Gain has to be in [0,89]")
return self.send_receive("set uhd rxgain %.4f" % float(gain))
def get_rxgain(self):
"""Get the rxgain value in dB for the ODR-DabMod."""
# TODO handle failure
return float(self.send_receive("get uhd rxgain")[0])
def set_digital_gain(self, gain):
"""Set a new rxgain for the ODR-DabMod.
Parameters
----------
gain : int
new RX gain, in the same format as ODR-DabMod's config file
"""
msg = "set gain digital %.5f" % gain
return self.send_receive(msg)
def get_digital_gain(self):
"""Get the rxgain value in dB for the ODR-DabMod."""
# TODO handle failure
return float(self.send_receive("get gain digital")[0])
def _read_coef_file(self, path):
"""Load the coefficients from the file in the format given in the README,
return ([AM coef], [PM coef])"""
coefs_am_out = []
coefs_pm_out = []
f = open(path, 'r')
lines = f.readlines()
n_coefs = int(lines[0])
coefs = [float(l) for l in lines[1:]]
i = 0
for c in coefs:
if i < n_coefs:
coefs_am_out.append(c)
elif i < 2*n_coefs:
coefs_pm_out.append(c)
else:
raise ValueError(
"Incorrect coef file format: too many coefficients in {}, should be {}, coefs are {}"
.format(path, n_coefs, coefs))
i += 1
f.close()
return (np.array(coefs_am_out, dtype=np.float32),
np.array(coefs_pm_out, dtype=np.float32))
def get_coefs(self):
return self._read_coef_file(self.coef_path)
def _write_coef_file(self, coefs_am, coefs_pm, path):
assert(len(coefs_am) == len(coefs_pm))
f = open(path, 'w')
f.write("{}\n".format(len(coefs_am)))
for coef in coefs_am:
f.write("{}\n".format(coef))
for coef in coefs_pm:
f.write("{}\n".format(coef))
f.close()
def set_coefs(self, coefs_am, coefs_pm):
self._write_coef_file(coefs_am, coefs_pm, self.coef_path)
self.send_receive("set memlesspoly coeffile {}".format(self.coef_path))
# The MIT License (MIT)
#
# Copyright (c) 2017 Andreas Steger, Matthias P. Braendli
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
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