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MicroPython-Hack-accelerometre (voir la source)
Version du 24 février 2015 à 12:05
, 24 février 2015 à 12:05→Réaliser un Niveau
== Réaliser un Niveau ==
== Réaliser un Niveau ==
[[Fichier:MicroPython-Hack-accelerometre-niveau.jpg]]<small><br/>Sous licence GPL via Wikimedia Commons - [http://commons.wikimedia.org/wiki/File:Water_level_1.jpg#mediaviewer/File:Water_level_1.jpg Water_level.jpg]</small>
[[Fichier:MicroPython-Hack-accelerometre-niveau.jpg]]<small><br/>Sous licence GPL via Wikimedia Commons - [http://commons.wikimedia.org/wiki/File:Water_level_1.jpg#mediaviewer/File:Water_level_1.jpg Water_level.jpg]</small>
The example above is only sensitive to the angle in the x direction but if we use the y() value and more LEDs we can turn the pyboard into a spirit level.
<nowiki>xlights = (pyb.LED(2), pyb.LED(3))
ylights = (pyb.LED(1), pyb.LED(4))
accel = pyb.Accel()
SENSITIVITY = 3
while True:
x = accel.x()
if x > SENSITIVITY:
xlights[0].on()
xlights[1].off()
elif x < -SENSITIVITY:
xlights[1].on()
xlights[0].off()
else:
xlights[0].off()
xlights[1].off()
y = accel.y()
if y > SENSITIVITY:
ylights[0].on()
ylights[1].off()
elif y < -SENSITIVITY:
ylights[1].on()
ylights[0].off()
else:
ylights[0].off()
ylights[1].off()
pyb.delay(100)</nowiki>
We start by creating a tuple of LED objects for the x and y directions. Tuples are immutable objects in python which means they can’t be modified once they are created. We then proceed as before but turn on a different LED for positive and negative x values. We then do the same for the y direction. This isn’t particularly sophisticated but it does the job. Run this on your pyboard and you should see different LEDs turning on depending on how you tilt the board.
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{{MicroPython-Hack-Accelerometre-TRAILER}}