40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
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import gc
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from encoder import Encoder, ROTARY_CPR
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# from encoder import REVERSED
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"""
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A demonstration of a rotary encoder being used to
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select items based on its physical position.
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This requires that the encoder is positioned in the same
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direction (e.g. upwards) at the start of every program run.
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"""
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# Free up hardware resources ahead of creating a new Encoder
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gc.collect()
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# Create an encoder on the 3 ADC pins, using PIO 0 and State Machine 0
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PIN_A = 26 # The A channel pin
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PIN_B = 28 # The B channel pin
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PIN_C = 27 # The common pin
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enc = Encoder(0, 0, (PIN_A, PIN_B), PIN_C, counts_per_rev=ROTARY_CPR)
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# Uncomment the below line (and the top import) to reverse the counting direction
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# enc.direction(REVERSED)
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# A list of items, up to the encoder's counts_per_rev
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ITEMS = ["Red", "Orange", "Yellow", "Green", "Blue", "Indigo", "Violet", "Black", "White"]
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last_step = -1
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# Loop forever
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while True:
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step = enc.step()
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if step != last_step:
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if step < len(ITEMS):
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print(step, ": ", ITEMS[step], sep="")
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else:
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print(step, ": ", "Undefined", sep="")
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last_step = step
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