frappy/secop/protocol/device.py
Enrico Faulhaber b6af55c358 reworking messages
1) start 'bin/secop-server test'
2) connect to localhost port 10767
3) enter help<enter>
4) enjoy

Change-Id: I488d5f9cdca8c91c583691ab23f541a4a8759f4e
2016-12-08 13:46:32 +01:00

77 lines
2.1 KiB
Python

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