Serge NOEL
70 lines
2.3 KiB
Python
70 lines
2.3 KiB
Python
# This is an example script for a JMRI "Siglet" in Python
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#
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# It listens for changes to two sensors and a turnout,
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# and then recalculates a signal aspect based on the values
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#
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# Author: Bob Jacobsen, copyright 2004
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# Part of the JMRI distribution
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import jarray
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import jmri
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class SigletExample(jmri.jmrit.automat.Siglet) :
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# defineIO() is called exactly once at the beginning, and is
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# required to load the "inputs" array with the turnouts, sensors
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# and signal heads that are used. Any changes in these will result
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# in setOutput being called to recalculate the result.
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#
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# Modify this to define all of your turnouts, sensors and
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# signal heads.
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def defineIO(self):
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self.to12 = turnouts.provideTurnout("12")
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self.bo21 = sensors.provideSensor("21")
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self.bo22 = sensors.provideSensor("22")
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# The signalhead should have been previously defined. Since this
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# is an example, we detect whether it was already defined, and
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# if not we create a particular signal head.
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self.si35 = signals.getSignalHead("35")
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if (self.si35 == None) :
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self.si35 = jmri.TripleTurnoutSignalHead("si35", "",
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turnouts.provideTurnout("101"),
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turnouts.provideTurnout("102"),
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turnouts.provideTurnout("103"))
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signals.register(self.si35)
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# Register the inputs so setOutput will be called when needed.
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# Note that the output si35 should _not_ in included as an input.
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self.setInputs(jarray.array([self.to12, self.bo21, self.bo22], jmri.NamedBean))
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return
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# setOutput is called when one of the inputs changes, and is
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# responsible for setting the correct output
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#
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# Modify this to do your calculation.
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def setOutput(self):
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newvalue = RED
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if self.to12.commandedState==THROWN:
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if self.bo21.knownState==INACTIVE:
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newvalue = GREEN
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else:
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if self.bo22.knownState==INACTIVE:
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newvalue = GREEN
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# set the signal aspect to the new value
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self.si35.appearance = newvalue;
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# print the value for diagnostic purposes
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print "output set to ", newvalue
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return
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# end of class definition
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# start one of these up
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SigletExample().start()
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