/usr/lib/python2.7/dist-packages/sardana/pool/poolcontrollers/TangoController.py is in python-sardana 1.2.0-2.
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##
## This file is part of Sardana
##
## http://www.tango-controls.org/static/sardana/latest/doc/html/index.html
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Sardana is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Sardana 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 Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Sardana. If not, see <http://www.gnu.org/licenses/>.
##
##############################################################################
import math
import PyTango
from taurus.core.util import CaselessDict
from sardana import State, DataAccess
from sardana.pool.controller import MotorController, CounterTimerController, \
ZeroDController, \
Type, Access, Description, DefaultValue
TangoAttribute = "TangoAttribute"
Formula = "Formula"
class ReadTangoAttributes(object):
""" Generic class that has as many devices as the user wants.
Each device has a tango attribute and a formula and the 'hardware' tango calls
are optimized in the sense that only one call per tango device is issued.
"""
axis_attributes = {
TangoAttribute : { Type : str, Access : DataAccess.ReadWrite,
Description : 'Attribute to read (e.g. a/b/c/attr)' },
Formula : { Type : str, Access : DataAccess.ReadWrite,
DefaultValue : "VALUE",
Description : 'The Formula to get the desired value.\n'
'e.g. "math.sqrt(VALUE)"' },
}
def __init__(self):
#: dict<int(axis), str(reason for being in pending)>
self._pending = {}
#: dict<str(dev name), tuple<DeviceProxy, list<str(attributes name)>>>
self._devices = CaselessDict()
#: dict<int(axis), seq<str<tango full attribute name>, str<attr name>, DeviceProxy>>
self._axis_tango_attributes = {}
#: dict<int(axis), str<formula>>
self._axis_formulas = {}
def add_device(self, axis):
self._pending[axis] = "No tango attribute associated to this device yet"
self._axis_formulas[axis] = self.axis_attribute[Formula][DefaultValue]
def delete_device(self, axis):
if axis in self._pending:
del self._pending[axis]
else:
del self._axis_tango_attributes[axis]
del self._axis_formulas[axis]
def state_one(self, axis):
pending_info = self._pending.get(axis)
if pending_info is not None:
return State.Fault, pending_info
return State.On, 'Always ON, just reading tango attribute'
def pre_read_all(self):
self._devices_read = {}
def pre_read_one(self, axis):
attr_name, dev = self._axis_tango_attributes[axis][1:]
dev_attrs = self._devices_read.get(dev)
if dev_attrs is None:
self._
self._devices_read[dev] = dev_attrs = []
dev_attrs.append(attr_name)
def read_all(self):
pass
def read_one(self, axis):
pass
def get_extra_attribute_par(self, axis, name):
if name == TangoAttribute:
return self._axis_tango_attributes[axis][0]
elif name == Formula:
return self._axis_formulas[axis]
def set_extra_attribute_par(self, axis, name, value):
if name == TangoAttribute:
value = value.lower()
self._axis_tango_attributes[axis] = data = value, None, None
try:
dev_name, attr_name = value.rsplit("/",1)
data[1] = attr_name
except:
self._pending[axis] = "invalid device name " + value
raise Exception(self._pending[axis])
dev_info = self._devices.get(dev_name)
if dev_info is None:
try:
proxy = PyTango.DeviceProxy(dev_name)
except PyTango.DevFailed, df:
if len(df):
self._pending[axis] = df[0].reason + ": " + df[0].desc
else:
self._pending[axis] = "Unknwon PyTango Error: " + str(df)
raise
self._devices[dev_name] = dev_info = proxy, []
data[2] = dev_info[0]
dev_info[1].append(attr_name)
elif name == Formula:
self._axis_formulas[axis] = value
class TangoCounterTimerController(ReadTangoAttributes, CounterTimerController):
"""This controller offers as many channels as the user wants.
Each channel has two _MUST_HAVE_ extra attributes:
+) TangoAttribute - Tango attribute to retrieve the value of the counter
+) Formula - Formula to evaluate using 'VALUE' as the tango attribute value
As examples you could have:
ch1.TangoExtraAttribute = 'my/tango/device/attribute1'
ch1.Formula = '-1 * VALUE'
ch2.TangoExtraAttribute = 'my/tango/device/attribute2'
ch2.Formula = 'math.sqrt(VALUE)'
ch3.TangoExtraAttribute = 'my_other/tango/device/attribute1'
ch3.Formula = 'math.cos(VALUE)'
"""
gender = ""
model = ""
organization = "Sardana team"
MaxDevice = 1024
def __init__(self, inst, props, *args, **kwargs):
ReadTangoAttributes.__init__(self)
CounterTimerController.__init__(self, inst, props, *args, **kwargs)
def AddDevice(self, axis):
self.add_device(axis)
def DeleteDevice(self, axis):
self.delete_device(axis)
def StateOne(self, axis):
return self.state_one(axis)
def PreReadAll(self):
self.pre_read_all()
def PreReadOne(self, axis):
self.pre_read_one(axis)
def ReadAll(self):
self.read_all()
def ReadOne(self, axis):
return self.read_one(axis)
def GetExtraAttributePar(self, axis, name):
return self.get_extra_attribute_par(axis, name)
def SetExtraAttributePar(self,axis, name, value):
self.set_extra_attribute_par(axis, name, value)
def SendToCtrl(self,in_data):
return ""
def AbortOne(self, axis):
pass
def PreStartAllCT(self):
pass
def StartOneCT(self, axis):
pass
def StartAllCT(self):
pass
def LoadOne(self, axis, value):
pass
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