Markus Zolliker
9f7413a1a5
- timestamp.TimeStamp is used as a dummy detector - labcommands may be used in lab expts. but is somehow outdated
125 lines
3.2 KiB
Python
125 lines
3.2 KiB
Python
# *****************************************************************************
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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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# *****************************************************************************
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"""helper devices for lab experiments"""
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import time
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from nicos.core import Override, Param, Measurable
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from nicos.core.params import Value
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class Timestamp(Measurable):
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"""to be used as a 'detector' in lab experiments
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just waiting the preset time
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"""
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parameter_overrides = {
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'unit': Override(default='sec', mandatory=False),
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}
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parameters = {
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'show': Param('show timestamp in data file', type=bool,
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settable=True, default=True, mandatory=False),
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}
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_preset = 0
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_time_used = 0
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_start = 0
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def _getCache(self):
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"""no cache needed"""
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self._cache = None
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def doRead(self, maxage=0):
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return time.time()
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def doStatus(self, maxage=0):
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return 100, ''
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def doSetPreset(self, t=0, **preset):
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self._start = 0
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self._preset = t
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self._value = 0
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def doStart(self):
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self._start = time.time()
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def doPause(self):
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self._time_used = time.time() - self._start
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return True
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def doResume(self):
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self._start = time.time() - self._time_used
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def doFinish(self):
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pass
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def doStop(self):
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pass
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def doIsCompleted(self):
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return time.time() > self._start + self._preset
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def valueInfo(self):
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if self.show:
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return Measurable.valueInfo(self)
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return ()
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class Det(Measurable):
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"""wrap a Readable into a Detector
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just for placing the result in a scan file in the detector part
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"""
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temporary = True
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def __init__(self, dev):
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self._dev = dev
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Measurable.__init__(self, str(dev), unit=dev.unit, fmtstr=dev.fmtstr)
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def _getCache(self):
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"""no cache needed"""
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self._cache = None
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def doRead(self, maxage=0):
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return self._dev.doRead(maxage)
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def doStatus(self, maxage=0):
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return self._dev.doStatus(maxage)
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def doSetPreset(self, t=5, **preset):
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self._start = 0
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self._preset = t
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def doStart(self):
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self._start = time.time()
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def doFinish(self):
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pass
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def doStop(self):
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self._start = 0
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def doIsCompleted(self):
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return time.time() > self._start + self._preset
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def valueInfo(self):
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return Value(self.name, unit=self.unit, fmtstr=self.fmtstr),
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