Markus Zolliker
0641968715
this is not (yet) in the frm2 repo Change-Id: Ia5b2996803c3dbb15b85ab1bc3a24717ac6297fb
93 lines
3.3 KiB
Python
93 lines
3.3 KiB
Python
#!/usr/bin/env python
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# -*- 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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# Markus Zolliker <markus.zolliker@psi.ch>
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# *****************************************************************************
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"""Temp"""
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from secop.modules import Readable, Drivable, Parameter, Override
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from secop.datatypes import FloatRange, IntRange, StringType
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from secop.stringio import HasIodev
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Status = Drivable.Status
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class TempLoop(HasIodev, Drivable):
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'''temperature channel on Lakeshore 336'''
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parameters = {
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'value':
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Override(datatype=FloatRange(unit='K'), default=0, poll=True),
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'status':
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Override(poll=False),
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'target':
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Override(datatype=FloatRange(1.0, 402.0, unit='K'), default=1.3, poll=True),
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'tolerance':
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Parameter('the tolerance', FloatRange(-400,400), default=1, readonly=False),
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'pollinterval':
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Override(visibility=3),
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'channel':
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Parameter('the Lakeshore channel', datatype=StringType(), export=False),
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'loop':
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Parameter('the Lakeshore loop number', datatype=IntRange(1,3), export=False),
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}
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def earlyInit(self):
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super(TempLoop, self).earlyInit()
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self.status = [Status.IDLE, 'idle']
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def read_value(self):
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result = self.sendRecv('KRDG?%s' % self.channel)
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result = float(result)
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if self.status == Status.BUSY and abs(result - self.target) < self.tolerance:
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self.status = [Status.IDLE, 'reached target']
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return result
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def read_target(self):
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result = self.sendRecv('SETP?%d' % self.loop)
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return float(result)
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def write_target(self, value):
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result = float(self.sendRecv('SETP %d,%g;SETP? %d' % (self.loop, value, self.loop)))
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self.status = [Status.BUSY, 'changed target']
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float('x')
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return result
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def do_stop(self):
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self.target = self.value
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self.status = [Status.IDLE, 'stopped']
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class TempChannel(HasIodev, Readable):
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'''temperature channel on Lakeshore 336'''
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parameters = {
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'value':
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Override(datatype=FloatRange(unit='K'), default=0, poll=True),
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'status':
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Override(poll=False, constant=[Status.IDLE, 'idle']),
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'pollinterval':
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Override(visibility=3),
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'channel':
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Parameter('the Lakeshore channel', datatype=StringType(), export=False),
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}
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def read_value(self):
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result = self.sendRecv('KRDG?%s' % self.channel)
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result = float(result)
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return result
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