kopia lustrzana https://github.com/GuyCarver/MicroPython
73 wiersze
2.1 KiB
Python
73 wiersze
2.1 KiB
Python
#Passive infrared motipower sensor.
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import pyb
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class PIR(object):
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"""Passive Infrared Motion Sensor driver. Supports on/off through an output pin
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trigger reading as well as an interrupt callback on trigger high/low changes."""
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def __init__(self, power, trigger, callback = None):
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"""Power and trigger pins, optional interrupt callback in the format
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of fun( bOnOff ). This will be called whenever the trigger state
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changes."""
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if power != None:
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self._power = pyb.Pin(power, pyb.Pin.OUT_PP)
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self._power.low()
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else:
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self._power = None
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self._trigger = pyb.Pin(trigger, pyb.Pin.IN, pyb.Pin.PULL_DOWN)
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self.interrupt = callback
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def _onoff( self, aTF ) :
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"""Turn device on/off"""
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if (self._power != None):
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if (aTF):
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oldon = self.inton
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self.inton = False #Make sure interrupt is off while turning on power to avoid false callbacks.
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self._power.high()
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if (oldon):
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pyb.delay(200) #Need to wait a bit after turning on to make sure we don't get false values.
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self.inton = oldon
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else:
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self._power.low()
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@property
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def power(self): return True if (self._power == None) else self._power.value()
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@power.setter
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def power(self, value): self._onoff(value)
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def on( self ) : self.power = True
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def off( self ) : self.power = False
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@property
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def trigger(self): return self._trigger.value()
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@property
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def interrupt(self): return self._interrupt
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@interrupt.setter
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def interrupt(self, func):
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self._interrupt = None;
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self._func = func
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if (func != None):
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self._interrupt = pyb.ExtInt(self._trigger, pyb.ExtInt.IRQ_RISING_FALLING, pyb.Pin.PULL_DOWN, self._inthandler)
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self._inton = True
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def _inthandler(self, line):
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'''Function to handle interrupts and pass on to callback with on/off trigger state.'''
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if (self._func != None):
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self._func(self.trigger)
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@property
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def inton(self): return self._inton
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@inton.setter
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def inton(self, value):
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self._inton = value
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if self._interrupt != None:
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if value :
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self._interrupt.enable()
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else:
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self._interrupt.disable()
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