58 lines
1.4 KiB
Python
58 lines
1.4 KiB
Python
# Copyright 2015 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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"""Demo that spins a six sided dice."""
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import ser2neo
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import datetime
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import time
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import random
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def angle2idx(neo, angle, limit):
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return round(angle * neo.nleds / limit)
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def main():
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port = ser2neo.open_port('/dev/ttyUSB0')
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neo = ser2neo.NeoPixels(port)
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random.seed()
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dt = 0.02 + random.random() * 0.02
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gain = 0.05
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at = 1
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run = 0
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while dt < 0.4:
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neo.clear()
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for i in range(0, at):
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neo.set(angle2idx(neo, i, at) + run, ser2neo.Colour.Red)
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neo.send()
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neo.wait()
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at += 1
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if at == 7:
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at = 1
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# Also rotate the dice to make it look nicer.
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run += 1
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time.sleep(dt)
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# Slowly bring the dice to a stop.
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dt += dt * gain
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time.sleep(2)
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if __name__ == '__main__':
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main()
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