76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
# osmo_gsm_tester: class defining a RF emulation object implemented using a Minicircuits RC4DAT-6G-60 device
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#
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# Copyright (C) 2020 by sysmocom - s.f.m.c. GmbH
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#
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# Author: Pau Espin Pedrol <pespin@sysmocom.de>
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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
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# published by the Free Software Foundation, either version 3 of the
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# License, or (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
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import urllib.request
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import xml.etree.ElementTree as ET
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from ..core import log
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from .rfemu import RFemulation
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# https://www.minicircuits.com/softwaredownload/Prog_Manual-6-Programmable_Attenuator.pdf
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class RFemulationMinicircuitsHTTP(RFemulation):
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# HTTP request timeout, in seconds
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HTTP_TIMEOUT = 5
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##############
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# PROTECTED
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##############
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def __init__(self, conf):
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super().__init__(conf, 'minicircuits')
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self.addr = conf.get('addr')
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self.ports = conf.get('ports')
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if self.addr is None:
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raise log.Error('No "addr" attribute provided in supply conf!')
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if self.ports is None or len(self.ports) == 0:
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raise log.Error('No "port" attribute provided in supply conf!')
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self.set_name('minicircuits(%s:%r)' % (self.addr, self.ports))
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def __del__(self):
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self.dbg('Resetting channel attenuation to zero')
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self.set_attenuation(0)
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def _url_prefix(self):
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#http://10.12.1.216/:SetAttPerChan:1:0_2:0_3:0_4:0
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return 'http://' + self.addr
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def _utl_set_attenauation(self, db):
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ports_str = ""
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for port in self.ports:
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ports_str = ports_str + str(port) + ":"
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return self._url_prefix() + '/:CHAN:' + ports_str + 'SETATT:' + str(db)
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#############################
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# PUBLIC (test API included)
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#############################
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def set_attenuation(self, db):
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url = self._utl_set_attenauation(db)
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self.dbg('sending HTTP req: "%s"' % url)
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data = urllib.request.urlopen(url, timeout = self.HTTP_TIMEOUT).read()
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data_str = str(data, 'utf-8')
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self.dbg('Received response: "%s"' % data_str)
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if data_str != '1':
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raise log.Error('Mini-circuits attenuation device returned failure! %s' & data_str)
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def get_max_attenuation(self):
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return 95 # Maximum value of the Mini-Circuits RC4DAT-6G-95
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# vim: expandtab tabstop=4 shiftwidth=4
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