Adolfo Reyna
74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
"""CircuitPython polled and debounced Button driver.
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Replaces the MicroPython Pin IRQ implementation with active loop polling.
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"""
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import time
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import digitalio
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class Button:
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def __init__(self, pin_obj, name="Button", debounce_ms=50, long_press_ms=800):
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self.pin = digitalio.DigitalInOut(pin_obj)
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self.pin.switch_to_input(pull=digitalio.Pull.UP)
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self.name = name
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self.debounce_s = debounce_ms / 1000.0
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self.long_press_s = long_press_ms / 1000.0
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self.last_state = True
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self.press_time = 0.0
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self.last_debounce_time = 0.0
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self.click_callback = None
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self.long_press_callback = None
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def is_pressed(self):
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return not self.pin.value
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def on_click(self, callback):
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self.click_callback = callback
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return callback
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def on_long_press(self, callback):
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self.long_press_callback = callback
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return callback
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def update(self):
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now = time.monotonic()
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val = self.pin.value
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if (now - self.last_debounce_time) < self.debounce_s:
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return
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if val != self.last_state:
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self.last_debounce_time = now
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self.last_state = val
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if not val:
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# Pressed (Active Low)
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self.press_time = now
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else:
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# Released
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if self.press_time > 0.0:
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duration = now - self.press_time
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self.press_time = 0.0
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if duration >= self.long_press_s:
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if self.long_press_callback:
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self.long_press_callback()
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else:
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if self.click_callback:
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self.click_callback()
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class BoardButtons:
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def __init__(self, boot_pin, key_pin=None):
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self.boot = Button(boot_pin, "BOOT")
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if key_pin is not None:
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self.key = Button(key_pin, "KEY")
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else:
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self.key = None
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def update(self):
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self.boot.update()
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if self.key is not None:
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self.key.update()
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