48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
# SPDX-FileCopyrightText: 2021 John Furcean
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# SPDX-License-Identifier: MIT
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"""I2C rotary encoder simple test example."""
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import board
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from adafruit_seesaw import digitalio, rotaryio, seesaw
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# For use with the STEMMA connector on QT Py RP2040
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# import busio
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# i2c = busio.I2C(board.SCL1, board.SDA1)
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# seesaw = seesaw.Seesaw(i2c, 0x36)
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i2c = board.I2C() # uses board.SCL and board.SDA
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# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
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seesaw = seesaw.Seesaw(i2c, addr=0x36)
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seesaw_product = (seesaw.get_version() >> 16) & 0xFFFF
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print(f"Found product {seesaw_product}")
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if seesaw_product != 4991:
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print("Wrong firmware loaded? Expected 4991")
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# Configure seesaw pin used to read knob button presses
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# The internal pull up is enabled to prevent floating input
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seesaw.pin_mode(24, seesaw.INPUT_PULLUP)
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button = digitalio.DigitalIO(seesaw, 24)
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button_held = False
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encoder = rotaryio.IncrementalEncoder(seesaw)
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last_position = None
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while True:
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# negate the position to make clockwise rotation positive
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position = -encoder.position
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if position != last_position:
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last_position = position
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print(f"Position: {position}")
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if not button.value and not button_held:
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button_held = True
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print("Button pressed")
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if button.value and button_held:
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button_held = False
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print("Button released")
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