68 lines
2.6 KiB
Python
68 lines
2.6 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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# Markus Zolliker <markus.zolliker@psi.ch>
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# Jael Celia Lorenzana <jael-celia.lorenzana@psi.ch>
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# *****************************************************************************
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"""Powersupply B&K Precision BK168xB"""
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from frappy.core import StringIO, Readable, Parameter, FloatRange, Writable, HasIO, BoolType
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class IO(StringIO):
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end_of_line = ('OK\r', '\r')
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default_settings = {'baudrate': 9600}
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class Power(HasIO, Readable):
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value = Parameter(datatype=FloatRange(0,300,unit='W'))
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def read_value(self):
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reply = self.communicate('GETD')
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volt = float(reply[0:4])/100
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current = float(reply[4:8])/100
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return volt*current
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class Output(HasIO, Writable):
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value = Parameter(datatype=FloatRange(0,100,unit='%'))
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target = Parameter(datatype=FloatRange(0,100,unit='%'))
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maxvolt = Parameter('voltage at 100%',datatype=FloatRange(0,60,unit='V'),default=50,readonly=False)
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maxcurrent = Parameter('current at 100%',datatype=FloatRange(0,5,unit='A'),default=2,readonly=False)
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output_enable = Parameter('control on/off', BoolType(), readonly=False)
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def initModule(self):
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super().initModule()
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self.write_output_enable(False)
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def write_target(self, target):
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self.write_output_enable(target != 0)
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self.communicate(f'VOLT{round(max(8,target*self.maxvolt/10)):03d}')
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self.communicate(f'CURR{round(target*self.maxcurrent):03d}')
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self.value = target
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def write_output_enable(self, value):
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self.communicate(f'SOUT{int(not value)}')
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def write_maxvolt(self, maxvolt):
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self.communicate(f'SOVP{round(maxvolt*10):03d}')
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def write_maxcurrent(self, maxcurrent):
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self.communicate(f'SOCP{round(maxcurrent*100):03d}')
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def shutdown(self):
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self.write_target(0)
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