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92 lines
4.2 KiB
92 lines
4.2 KiB
# This test requires that the Agilent IVI-COM Driver for Agilent546XX
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# is installed. It is not requires to have a physical instrument
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# connected, the driver is used in simulation mode.
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import unittest
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from comtypes.test import ResourceDenied
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from comtypes.client import CreateObject
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from comtypes import GUID
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from comtypes.safearray import _midlSAFEARRAY
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from ctypes import c_double, POINTER
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try:
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GUID.from_progid("Agilent546XX.Agilent546XX")
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except WindowsError:
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pass
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else:
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class Test(unittest.TestCase):
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def test(self):
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# The point of this test is the ReadWaveform method below,
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# which takes several [in, out] arguments.
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agDrvr = CreateObject("Agilent546XX.Agilent546XX")
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# XXX XXX XXX The following call crashes hard with an accessviolation when
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# the OANOCACHE environ variable is set.
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import os
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if "OANOCACHE" in os.environ:
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print("Cannot test. buggy COM object?")
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return
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# Initialize the driver in simulation mode. Resource descriptor is ignored.
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agDrvr.Initialize("", False, False, "Simulate=true")
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# Initialize driver. Edit resource descriptor for your system.
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# agDrvr.Initialize("GPIB0::7::INSTR", False, False, "QueryInstrStatus=true")
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from comtypes.gen import IviScopeLib
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iviDrvr = agDrvr.QueryInterface(IviScopeLib.IIviScope)
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# Get driver Identity properties. Driver initialization not required.
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## print "Identifier:", iviDrvr.Identity.Identifier
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## print " Revision:", agDrvr.Identity.Revision
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## print "Description:", agDrvr.Identity.Description
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# Get instrument Identity properties.
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## print "InstrumentModel: ", agDrvr.Identity.InstrumentModel
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## print " FirmwareRevision: ", agDrvr.Identity.InstrumentFirmwareRevision
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## print " SerialNumber: ", agDrvr.System.SerialNumber
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# Setup for a measurement. Reset in this case.
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agDrvr.Utility.Reset()
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pMeasurement = agDrvr.Measurements.Item("UserChannel1")
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# ReadWaveform() takes a sweep and reads the data.
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#
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# Definition generated for ReadWaveform():
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#COMMETHOD([helpstring(u'Acquires and returns a waveform on the configured channels.')],
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# HRESULT, 'ReadWaveform',
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# ( ['in'], Agilent546XXTimeOutEnum, 'MaxTime' ),
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# ( ['in', 'out'], POINTER(_midlSAFEARRAY(c_double)), 'pWaveformArray' ),
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# ( ['in', 'out'], POINTER(c_double), 'pInitialX' ),
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# ( ['in', 'out'], POINTER(c_double), 'pXIncrement' )),
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# [in, out] arguments are now optional (comtypes
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# constructs an empty default value when nothing is
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# passed).
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psaWaveform = _midlSAFEARRAY(c_double).create([])
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self._check_result(pMeasurement.ReadWaveform(20000))
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self._check_result(pMeasurement.ReadWaveform(20000, pInitialX=9.0))
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self._check_result(pMeasurement.ReadWaveform(20000, pXIncrement=9.0, pInitialX=3.0))
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self._check_result(pMeasurement.ReadWaveform(20000))
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self._check_result(pMeasurement.ReadWaveform(20000, []))
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self._check_result(pMeasurement.ReadWaveform(20000, pWaveformArray = []))
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self._check_result(pMeasurement.ReadWaveform(20000, psaWaveform))
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self._check_result(pMeasurement.ReadWaveform(20000, pXIncrement=9.0))
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def _check_result(self, xxx_todo_changeme):
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# ReadWaveform, in simulation mode, returns three values:
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#
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# - a safearray containing 100 random double values,
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# unpacked and returned as tuple
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# - the initial_x value: 0.0
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# - the x_increment value: 0.0
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(array, initial_x, x_increment) = xxx_todo_changeme
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self.assertEqual(len(array), 100)
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self.assertFalse([x for x in array if not isinstance(x, float)])
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self.assertEqual(initial_x, 0.0)
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self.assertEqual(x_increment, 0.0)
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if __name__ == "__main__":
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unittest.main()
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