75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
# SPDX-FileCopyrightText: 2020 Jeff Epler for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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# The MIT License (MIT)
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#
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# Copyright (c) 2020 Jeff Epler for Adafruit Industries LLC
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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"""
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Convert an analog joystick to digital
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"""
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import analogio
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import board
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class AnalogJoystick:
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"""Convert an analog joystick to digital"""
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def __init__(self, pin_x=None, pin_y=None, x_invert=False, y_invert=True, deadzone=8000):
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self._x = analogio.AnalogIn(pin_x or board.JOYSTICK_X)
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self._y = analogio.AnalogIn(pin_y or board.JOYSTICK_Y)
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self.x_invert = x_invert
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self.y_invert = y_invert
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self.deadzone = deadzone
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self.recenter()
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self.poll()
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def poll(self):
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"""Read the analog values and update the digital outputs"""
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self.x = (self._x.value - self.x_center) * (-1 if self.x_invert else 1)
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self.y = (self._y.value - self.y_center) * (-1 if self.y_invert else 1)
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return [self.up, self.down, self.left, self.right]
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# pylint: disable=invalid-name
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@property
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def up(self):
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"""Return true when the stick was pressed up at the last poll"""
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return self.y > self.deadzone
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# pylint: enable=invalid-name
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@property
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def down(self):
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"""Return true when the stick was pressed down at the last poll"""
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return self.y < -self.deadzone
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@property
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def left(self):
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"""Return true when the stick was pressed left at the last poll"""
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return self.x < -self.deadzone
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@property
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def right(self):
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"""Return true when the stick was pressed right at the last poll"""
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return self.x > self.deadzone
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def recenter(self):
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"""Use the current position of the analog joystick as the center"""
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self.x_center = self._x.value
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self.y_center = self._y.value
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