45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
# *****************************************************************************
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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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# Paul M. Neves <pmneves@mit.edu>
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# *****************************************************************************
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from frappy.core import Readable, Parameter, FloatRange, Module, Attached, Writable
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class Temp(Writable):
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"""a voltage output with loop"""
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value = Parameter(unit='K', value=0)
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target = Parameter('target voltage', FloatRange(0, 325, unit='K'),
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readonly=False)
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def write_target(self, target):
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self.value = target
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class Forwarder(Module):
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"""forward the values of a module to the target of another module"""
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src = Attached(Readable, 'source module')
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dst = Attached(Writable, 'destination module')
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def initModule(self):
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super().initModule()
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self.src.registerCallbacks(self)
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def update_value(self, value):
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self.dst.write_target(value)
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