8efd1df92c
Change-Id: I5486e1f9b3143c6bb0804c49c7ca21adb9b84de1 Reviewed-on: https://forge.frm2.tum.de/review/19524 Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de> Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
323 lines
12 KiB
Python
323 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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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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"""testing devices"""
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from __future__ import division, print_function
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import random
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import threading
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import time
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from secop.datatypes import (ArrayOf, BoolType, EnumType, FloatRange, IntRange,
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StringType, StructOf, TupleOf)
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from secop.lib.enum import Enum
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from secop.modules import Drivable, Override, Parameter, Readable
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class Switch(Drivable):
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"""switch it on or off....
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"""
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parameters = {
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'value': Override('current state (on or off)',
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datatype=EnumType(on=1, off=0), default=0,
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),
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'target': Override('wanted state (on or off)',
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datatype=EnumType(on=1, off=0), default=0,
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readonly=False,
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),
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'switch_on_time': Parameter('seconds to wait after activating the switch',
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datatype=FloatRange(0, 60), unit='s',
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default=10, export=False,
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),
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'switch_off_time': Parameter('cool-down time in seconds',
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datatype=FloatRange(0, 60), unit='s',
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default=10, export=False,
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),
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}
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def read_value(self, maxage=0):
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# could ask HW
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# we just return the value of the target here.
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self._update()
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return self.value
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def read_target(self, maxage=0):
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# could ask HW
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return self.target
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def write_target(self, value):
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# could tell HW
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setattr(self, 'status', (self.Status.BUSY, 'switching %s' % value.name.upper()))
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# note: setting self.target to the new value is done after this....
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# note: we may also return the read-back value from the hw here
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def read_status(self, maxage=0):
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self.log.info("read status")
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info = self._update()
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if self.target == self.value:
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return self.Status.IDLE, ''
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return self.Status.BUSY, info
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def _update(self):
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started = self.accessibles['target'].timestamp
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info = ''
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if self.target > self.value:
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info = 'waiting for ON'
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if time.time() > started + self.switch_on_time:
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info = 'is switched ON'
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self.value = self.target
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elif self.target < self.value:
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info = 'waiting for OFF'
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if time.time() > started + self.switch_off_time:
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info = 'is switched OFF'
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self.value = self.target
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if info:
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self.log.info(info)
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return info
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class MagneticField(Drivable):
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"""a liquid magnet
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"""
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parameters = {
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'value': Override('current field in T',
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unit='T', datatype=FloatRange(-15, 15), default=0,
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),
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'target': Override('target field in T',
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unit='T', datatype=FloatRange(-15, 15), default=0,
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readonly=False,
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),
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'ramp': Parameter('ramping speed',
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unit='T/min', datatype=FloatRange(0, 1), default=0.1,
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readonly=False,
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),
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'mode': Parameter('what to do after changing field',
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default=1, datatype=EnumType(persistent=1, hold=0),
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readonly=False,
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),
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'heatswitch': Parameter('name of heat switch device',
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datatype=StringType(), export=False,
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),
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}
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def init_module(self):
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self._state = Enum('state', idle=1, switch_on=2, switch_off=3, ramp=4).idle
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self._heatswitch = self.DISPATCHER.get_module(self.heatswitch)
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_thread = threading.Thread(target=self._thread)
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_thread.daemon = True
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_thread.start()
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def read_value(self, maxage=0):
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return self.value
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def write_target(self, value):
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self.status = self.Status.BUSY, 'setting target'
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# could tell HW
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return round(value, 2)
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# note: setting self.target to the new value is done after this....
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# note: we may also return the read-back value from the hw here
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def read_status(self, maxage=0):
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if self._state == self._state.enum.idle:
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return (self.Status.IDLE, '')
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return (self.Status.BUSY, self._state.name)
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def _thread(self):
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loopdelay = 1
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while True:
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ts = time.time()
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if self._state == self._state.enum.idle:
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if self.target != self.value:
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self.log.debug('got new target -> switching heater on')
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self._state = self._state.enum.switch_on
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self._heatswitch.write_target('on')
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if self._state == self._state.enum.switch_on:
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# wait until switch is on
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if self._heatswitch.read_value() == 'on':
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self.log.debug('heatswitch is on -> ramp to %.3f' %
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self.target)
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self._state = self._state.enum.ramp
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if self._state == self._state.enum.ramp:
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if self.target == self.value:
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self.log.debug('at field! mode is %r' % self.mode)
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if self.mode:
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self.log.debug('at field -> switching heater off')
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self._state = self._state.enum.switch_off
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self._heatswitch.write_target('off')
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else:
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self.log.debug('at field -> hold')
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self._state = self._state.enum.idle
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self.read_status() # push async
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else:
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step = self.ramp * loopdelay / 60.
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step = max(min(self.target - self.value, step), -step)
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self.value += step
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if self._state == self._state.enum.switch_off:
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# wait until switch is off
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if self._heatswitch.read_value() == 'off':
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self.log.debug('heatswitch is off at %.3f' % self.value)
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self._state = self._state.enum.idle
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self.read_status() # update async
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time.sleep(max(0.01, ts + loopdelay - time.time()))
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self.log.error(self, 'main thread exited unexpectedly!')
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def do_stop(self):
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self.write_target(self.read_value())
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class CoilTemp(Readable):
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"""a coil temperature
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"""
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parameters = {
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'value': Override('Coil temperatur',
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unit='K', datatype=FloatRange(), default=0,
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),
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'sensor': Parameter("Sensor number or calibration id",
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datatype=StringType(), readonly=True,
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),
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}
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def read_value(self, maxage=0):
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return round(2.3 + random.random(), 3)
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class SampleTemp(Drivable):
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"""a sample temperature
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"""
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parameters = {
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'value': Override('Sample temperature',
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unit='K', datatype=FloatRange(), default=10,
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),
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'sensor': Parameter("Sensor number or calibration id",
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datatype=StringType(), readonly=True,
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),
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'ramp': Parameter('moving speed in K/min',
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datatype=FloatRange(0, 100), unit='K/min', default=0.1,
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readonly=False,
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),
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}
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def init_module(self):
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_thread = threading.Thread(target=self._thread)
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_thread.daemon = True
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_thread.start()
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def write_target(self, value):
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# could tell HW
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return round(value, 2)
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# note: setting self.target to the new value is done after this....
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# note: we may also return the read-back value from the hw here
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def _thread(self):
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loopdelay = 1
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while True:
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ts = time.time()
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if self.value == self.target:
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if self.status[0] != self.Status.IDLE:
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self.status = self.Status.IDLE, ''
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else:
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self.status = self.Status.BUSY, 'ramping'
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step = self.ramp * loopdelay / 60.
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step = max(min(self.target - self.value, step), -step)
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self.value += step
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time.sleep(max(0.01, ts + loopdelay - time.time()))
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self.log.error(self, 'main thread exited unexpectedly!')
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class Label(Readable):
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"""Displays the status of a cryomagnet
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by composing its (stringtype) value from the status/value
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of several subdevices. used for demoing connections between
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modules.
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"""
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parameters = {
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'system': Parameter("Name of the magnet system",
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datatype=StringType, export=False,
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),
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'subdev_mf': Parameter("name of subdevice for magnet status",
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datatype=StringType, export=False,
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),
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'subdev_ts': Parameter("name of subdevice for sample temp",
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datatype=StringType, export=False,
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),
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'value': Override("final value of label string", default='',
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datatype=StringType,
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),
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}
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def read_value(self, maxage=0):
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strings = [self.system]
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dev_ts = self.DISPATCHER.get_module(self.subdev_ts)
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if dev_ts:
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strings.append('at %.3f %s' %
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(dev_ts.read_value(), dev_ts.parameters['value'].unit))
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else:
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strings.append('No connection to sample temp!')
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dev_mf = self.DISPATCHER.get_module(self.subdev_mf)
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if dev_mf:
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mf_stat = dev_mf.read_status()
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mf_mode = dev_mf.mode
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mf_val = dev_mf.value
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mf_unit = dev_mf.parameters['value'].unit
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if mf_stat[0] == self.Status.IDLE:
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state = 'Persistent' if mf_mode else 'Non-persistent'
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else:
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state = mf_stat[1] or 'ramping'
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strings.append('%s at %.1f %s' % (state, mf_val, mf_unit))
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else:
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strings.append('No connection to magnetic field!')
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return '; '.join(strings)
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class DatatypesTest(Readable):
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"""for demoing all datatypes
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"""
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parameters = {
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'enum': Parameter('enum', datatype=EnumType(boo=None, faar=None, z=9),
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readonly=False, default=1),
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'tupleof': Parameter('tuple of int, float and str',
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datatype=TupleOf(IntRange(), FloatRange(),
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StringType()),
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readonly=False, default=(1, 2.3, 'a')),
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'arrayof': Parameter('array: 2..3 times bool',
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datatype=ArrayOf(BoolType(), 2, 3),
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readonly=False, default=[1, 0, 1]),
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'intrange': Parameter('intrange', datatype=IntRange(2, 9),
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readonly=False, default=4),
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'floatrange': Parameter('floatrange', datatype=FloatRange(-1, 1),
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readonly=False, default=0, ),
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'struct': Parameter('struct(a=str, b=int, c=bool)',
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datatype=StructOf(a=StringType(), b=IntRange(),
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c=BoolType()),
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),
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}
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class ArrayTest(Readable):
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parameters = {
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"x": Parameter('value', datatype=ArrayOf(FloatRange(), 0, 100000),
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default = 100000 * [0]),
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}
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