76 lines
2.1 KiB
Python
76 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
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# *****************************************************************************
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
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#
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# *****************************************************************************
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"""Define SECoP Device classes
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"""
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# XXX: is this still needed ???
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# see devices.core ....
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from secop.lib import attrdict
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from secop.protocol import status
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# XXX: deriving PARS/CMDS should be done in a suitable metaclass....
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class Device(object):
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"""Minimalist Device
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all others derive from this"""
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name = None
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def read_status(self):
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raise NotImplementedError('All Devices need a Status!')
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def read_name(self):
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return self.name
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class Readable(Device):
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"""A Readable Device"""
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unit = ''
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def read_value(self):
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raise NotImplementedError('A Readable MUST provide a value')
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def read_unit(self):
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return self.unit
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class Writeable(Readable):
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"""Writeable can be told to change it's vallue"""
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target = None
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def read_target(self):
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return self.target
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def write_target(self, target):
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self.target = target
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class Driveable(Writeable):
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"""A Moveable which may take a while to reach its target,
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hence stopping it may be desired"""
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def do_stop(self):
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raise NotImplementedError('A Driveable MUST implement the STOP() '
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'command')
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