#!/usr/bin/env python
##############################################################################
##
# This file is part of Sardana
##
# http://www.sardana-controls.org/
##
# 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/>.
##
##############################################################################
""" """
__all__ = ["ZeroDExpChannel", "ZeroDExpChannelClass"]
__docformat__ = 'restructuredtext'
import time
from PyTango import Except
from PyTango import DevVoid, DevDouble, DevString
from PyTango import DispLevel, DevState, AttrQuality
from PyTango import READ, READ_WRITE, SCALAR, SPECTRUM
from taurus.core.util.log import DebugIt
from sardana import State, DataFormat, SardanaServer
from sardana.sardanaattribute import SardanaAttribute
from sardana.pool.controller import ZeroDController, Type
from sardana.tango.core.util import to_tango_type_format
from sardana.tango.pool.PoolDevice import PoolExpChannelDevice, \
PoolExpChannelDeviceClass
[docs]class ZeroDExpChannel(PoolExpChannelDevice):
def __init__(self, dclass, name):
PoolExpChannelDevice.__init__(self, dclass, name)
[docs] def init(self, name):
PoolExpChannelDevice.init(self, name)
[docs] def get_zerod(self):
return self.element
[docs] def set_zerod(self, zerod):
self.element = zerod
zerod = property(get_zerod, set_zerod)
[docs] @DebugIt()
def delete_device(self):
PoolExpChannelDevice.delete_device(self)
zerod = self.zerod
if zerod is not None:
zerod.remove_listener(self.on_zerod_changed)
self.zerod = None
[docs] @DebugIt()
def init_device(self):
PoolExpChannelDevice.init_device(self)
id_ = self.get_id()
try:
self.zerod = zerod = self.pool.get_element_by_id(id_)
except KeyError:
full_name = self.get_full_name()
name = self.alias or full_name
self.zerod = zerod = \
self.pool.create_element(type="ZeroDExpChannel", name=name,
full_name=full_name, id=id_, axis=self.Axis,
ctrl_id=self.get_ctrl_id())
zerod.add_listener(self.on_zerod_changed)
# force a state read to initialize the state attribute
#state = zerod.state
self.set_state(DevState.ON)
[docs] def on_zerod_changed(self, event_source, event_type, event_value):
# during server startup and shutdown avoid processing element
# creation events
if SardanaServer.server_state != State.Running:
return
timestamp = time.time()
quality = AttrQuality.ATTR_VALID
priority = event_type.priority
value = None
error = None
name = event_type.name.lower()
attr_name = name
attr = self.get_device_attr().get_attr_by_name(attr_name)
if name == "state":
value = self.calculate_tango_state(event_value)
elif name == "status":
value = self.calculate_tango_status(event_value)
elif name == "valuebuffer":
value = self._encode_value_chunk(event_value)
else:
if isinstance(event_value, SardanaAttribute):
if event_value.error:
error = Except.to_dev_failed(*event_value.exc_info)
else:
value = event_value.value
timestamp = event_value.timestamp
else:
value = event_value
if name == "value":
state = self.zerod.get_state()
if state == State.Moving:
quality = AttrQuality.ATTR_CHANGING
self.set_attribute(attr, value=value, timestamp=timestamp,
quality=quality, priority=priority, error=error,
synch=False)
[docs] def always_executed_hook(self):
#state = to_tango_state(self.zerod.get_state(cache=False))
pass
def read_attr_hardware(self, data):
pass
[docs] def get_dynamic_attributes(self):
cache_built = hasattr(self, "_dynamic_attributes_cache")
std_attrs, dyn_attrs = \
PoolExpChannelDevice.get_dynamic_attributes(self)
if not cache_built:
# For value attribute, listen to what the controller says for data
# type (between long and float)
value = std_attrs.get('value')
if value is not None:
attr_name, data_info, attr_info = value
ttype, _ = to_tango_type_format(attr_info.dtype)
data_info[0][0] = ttype
# Add manually a 'CurrentValue' with the same time as 'Value'
attr_name = 'CurrentValue'
attr_info = attr_info.copy()
attr_info.description = attr_name
std_attrs[attr_name] = [attr_name, data_info, attr_info]
return std_attrs, dyn_attrs
[docs] def initialize_dynamic_attributes(self):
attrs = PoolExpChannelDevice.initialize_dynamic_attributes(self)
detect_evts = "value",
non_detect_evts = "valuebuffer",
for attr_name in detect_evts:
if attr_name in attrs:
self.set_change_event(attr_name, True, True)
for attr_name in non_detect_evts:
if attr_name in attrs:
self.set_change_event(attr_name, True, False)
[docs] def read_Value(self, attr):
zerod = self.zerod
value = zerod.get_accumulated_value()
quality = None
if self.get_state() == State.Moving:
quality = AttrQuality.ATTR_CHANGING
self.set_attribute(attr, value=value.value,
quality=quality, priority=0)
[docs] def read_CurrentValue(self, attr):
zerod = self.zerod
#use_cache = ct.is_action_running() and not self.Force_HW_Read
use_cache = self.get_state() == State.Moving and not self.Force_HW_Read
value = zerod.get_current_value(cache=use_cache, propagate=0)
if value.error:
Except.throw_python_exception(*value.exc_info)
quality = None
state = zerod.get_state(cache=use_cache, propagate=0)
if state == State.Moving:
quality = AttrQuality.ATTR_CHANGING
self.set_attribute(attr, value=value.value, quality=quality,
priority=0, timestamp=value.timestamp)
[docs] def Start(self):
self.zerod.start_acquisition()
[docs] def read_AccumulationBuffer(self, attr):
attr.set_value(self.zerod.get_accumulation_buffer())
[docs] def read_TimeBuffer(self, attr):
attr.set_value(self.zerod.get_time_buffer())
[docs] def read_AccumulationType(self, attr):
attr.set_value(self.zerod.get_accumulation_type())
[docs] def write_AccumulationType(self, attr):
self.zerod.set_accumulation_type(attr.get_write_value())
def _is_allowed(self, req_type):
return PoolExpChannelDevice._is_allowed(self, req_type)
is_Value_allowed = _is_allowed
is_CurrentValue_allowed = _is_allowed
is_AccumulationType_allowed = _is_allowed
is_AccumulationBuffer_allowed = _is_allowed
is_TimeBuffer_allowed = _is_allowed
_DFT_VALUE_INFO = ZeroDController.standard_axis_attributes['Value']
_DFT_VALUE_TYPE, _DFT_VALUE_FORMAT = to_tango_type_format(
_DFT_VALUE_INFO[Type], DataFormat.Scalar)
[docs]class ZeroDExpChannelClass(PoolExpChannelDeviceClass):
# Class Properties
class_property_list = {
}
# Device Properties
device_property_list = {
}
device_property_list.update(PoolExpChannelDeviceClass.device_property_list)
# Command definitions
cmd_list = {
'Start': [[DevVoid, ""], [DevVoid, ""]],
}
cmd_list.update(PoolExpChannelDeviceClass.cmd_list)
# Attribute definitions
attr_list = {
'AccumulationBuffer': [[DevDouble, SPECTRUM, READ, 16 * 1024]],
'TimeBuffer': [[DevDouble, SPECTRUM, READ, 16 * 1024]],
'AccumulationType': [[DevString, SCALAR, READ_WRITE],
{'Memorized': "true_without_hard_applied",
'label': "Accumulation Type",
'Display level': DispLevel.EXPERT}],
}
attr_list.update(PoolExpChannelDeviceClass.attr_list)
standard_attr_list = {
'Value': [[_DFT_VALUE_TYPE, SCALAR, READ, ],
{'abs_change': '1.0', }],
}
standard_attr_list.update(PoolExpChannelDeviceClass.standard_attr_list)
def _get_class_properties(self):
ret = PoolExpChannelDeviceClass._get_class_properties(self)
ret['Description'] = "0D experimental channel device class"
ret['InheritedFrom'].insert(0, 'PoolExpChannelDevice')
return ret