kopia lustrzana https://github.com/peterhinch/micropython-micro-gui
Improve encoder precision.
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@ -1,12 +1,8 @@
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# encoder.py Asynchronous driver for incremental quadrature encoder.
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# Copyright (c) 2021 Peter Hinch
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# Copyright (c) 2021-2022 Peter Hinch
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# Released under the MIT License (MIT) - see LICENSE file
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# https://github.com/peterhinch/micropython-async/blob/master/v3/primitives/encoder.py
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# This driver is intended for encoder-based control knobs. It is
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# unsuitable for NC machine applications. Please see the docs.
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import uasyncio as asyncio
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from machine import Pin
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@ -17,9 +13,11 @@ class Encoder:
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callback=lambda a, b : None, args=()):
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self._pin_x = pin_x
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self._pin_y = pin_y
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self._x = pin_x()
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self._y = pin_y()
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self._v = 0 # Hardware value always starts at 0
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self._cv = v # Current (divided) value
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if ((vmin is not None) and v < min) or ((vmax is not None) and v > vmax):
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if ((vmin is not None) and v < vmin) or ((vmax is not None) and v > vmax):
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raise ValueError('Incompatible args: must have vmin <= v <= vmax')
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self._tsf = asyncio.ThreadSafeFlag()
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trig = Pin.IRQ_RISING | Pin.IRQ_FALLING
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@ -31,14 +29,20 @@ class Encoder:
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yirq = pin_y.irq(trigger=trig, handler=self._y_cb)
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asyncio.create_task(self._run(vmin, vmax, div, callback, args))
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# Hardware IRQ's
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def _x_cb(self, pin):
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fwd = pin() ^ self._pin_y()
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# Hardware IRQ's. Duration 36μs on Pyboard 1.
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def _x_cb(self, pin_x):
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if (x := pin_x()) == self._x: # IRQ latency: if 2nd edge has
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return # occurred there is no movement.
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self._x = x
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fwd = x ^ self._pin_y()
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self._v += 1 if fwd else -1
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self._tsf.set()
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def _y_cb(self, pin):
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fwd = pin() ^ self._pin_x() ^ 1
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def _y_cb(self, pin_y):
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if (y := pin_y()) == self._y:
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return
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self._y = y
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fwd = y ^ self._pin_x() ^ 1
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self._v += 1 if fwd else -1
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self._tsf.set()
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@ -53,4 +53,4 @@ prev = Pin(18, Pin.IN, Pin.PULL_UP) # Move to previous control
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increase = Pin(20, Pin.IN, Pin.PULL_UP) # Increase control's value
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decrease = Pin(17, Pin.IN, Pin.PULL_UP) # Decrease control's value
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# display = Display(ssd, nxt, sel, prev) # 3-button mode
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display = Display(ssd, nxt, sel, prev, increase, decrease, 5) # Encoder mode
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display = Display(ssd, nxt, sel, prev, increase, decrease, 4) # Encoder mode
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