add a lot of current stuff

this is not (yet) in the frm2 repo

Change-Id: Ia5b2996803c3dbb15b85ab1bc3a24717ac6297fb

secop_psi/testtemp.py

@@ -0,0 +1,92 @@
+#!/usr/bin/env 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:
+#   Markus Zolliker <markus.zolliker@psi.ch>
+# *****************************************************************************
+"""Temp"""
+
+from secop.modules import Readable, Drivable, Parameter, Override
+from secop.datatypes import FloatRange, IntRange, StringType
+from secop.stringio import HasIodev
+
+Status = Drivable.Status
+
+class TempLoop(HasIodev, Drivable):
+    '''temperature channel on Lakeshore 336'''
+
+    parameters = {
+        'value':
+            Override(datatype=FloatRange(unit='K'), default=0, poll=True),
+        'status':
+            Override(poll=False),
+        'target':
+            Override(datatype=FloatRange(1.0, 402.0, unit='K'), default=1.3, poll=True),
+        'tolerance':
+            Parameter('the tolerance', FloatRange(-400,400), default=1, readonly=False),
+        'pollinterval':
+            Override(visibility=3),
+        'channel':
+            Parameter('the Lakeshore channel', datatype=StringType(), export=False),
+        'loop':
+            Parameter('the Lakeshore loop number', datatype=IntRange(1,3), export=False),
+    }
+
+    def earlyInit(self):
+        super(TempLoop, self).earlyInit()
+        self.status = [Status.IDLE, 'idle']
+
+    def read_value(self):
+        result = self.sendRecv('KRDG?%s' % self.channel)
+        result = float(result)
+        if self.status == Status.BUSY and abs(result - self.target) < self.tolerance:
+            self.status = [Status.IDLE, 'reached target']
+        return result
+
+    def read_target(self):
+        result = self.sendRecv('SETP?%d' % self.loop)
+        return float(result)
+
+    def write_target(self, value):
+        result = float(self.sendRecv('SETP %d,%g;SETP? %d' % (self.loop, value, self.loop)))
+        self.status = [Status.BUSY, 'changed target']
+        float('x')
+        return result
+
+    def do_stop(self):
+        self.target = self.value
+        self.status = [Status.IDLE, 'stopped']
+
+
+class TempChannel(HasIodev, Readable):
+    '''temperature channel on Lakeshore 336'''
+
+    parameters = {
+        'value':
+            Override(datatype=FloatRange(unit='K'), default=0, poll=True),
+        'status':
+            Override(poll=False, constant=[Status.IDLE, 'idle']),
+        'pollinterval':
+            Override(visibility=3),
+        'channel':
+            Parameter('the Lakeshore channel', datatype=StringType(), export=False),
+    }
+
+    def read_value(self):
+        result = self.sendRecv('KRDG?%s' % self.channel)
+        result = float(result)
+        return result