Markus Zolliker
2b7ee0a72c
- generic method to access parameters with just an address changed to avoid boilerplate code - it would really be nice to include the generic methods into Module Change-Id: I898e5eeb282f03d3177a324fa88813976fb15f3c
76 lines
2.6 KiB
Python
76 lines
2.6 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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from frappy.core import Parameter, Property
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from frappy.datatypes import ValueType
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class AddrParam(Parameter):
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"""parameter with an address field
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instead of implementing read_<param> and write_<param>, just implement
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addressed_read and addressed_write.
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"""
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addr = Property('address', ValueType())
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class AddrMixin:
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"""mixin for addressed parameters
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in case a read_<param> and/or write_<param> are not implemented,
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they are created with a call to addressed_read and/or addressed_write
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"""
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def __init_subclass__(cls):
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for aname, aobj in list(cls.__dict__.items()):
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if isinstance(aobj, AddrParam):
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methodname = f'read_{aname}'
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if not hasattr(cls, methodname):
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def rfunc(self, pname=aname):
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return self.addressed_read(self.accessibles[pname])
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setattr(cls, methodname, rfunc)
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if not aobj.readonly:
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methodname = f'write_{aname}'
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if not hasattr(cls, methodname):
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def wfunc(self, value, pname=aname):
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return self.addressed_write(self.accessibles[pname], value)
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setattr(cls, methodname, wfunc)
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super().__init_subclass__()
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def addressed_read(self, pobj):
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"""addressed read
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:param pobj: the AddrParam
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:return: the value read
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"""
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return getattr(self, pobj.name)
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def addressed_write(self, pobj, value):
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"""addressed write
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:param pobj: the AddrParam
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:param value: the value to be written
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:return: the value written or None
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"""
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