50 lines
1.1 KiB
Python
50 lines
1.1 KiB
Python
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from pimoroni import ShiftRegister
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from machine import Pin
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import time
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SR_CLOCK = 8
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SR_LATCH = 9
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SR_OUT = 10
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LED_A = 11
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LED_B = 12
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LED_C = 13
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LED_D = 14
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LED_E = 15
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class Button:
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def __init__(self, sr, idx, led, debounce=50):
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self.sr = sr
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self.led = Pin(led, Pin.OUT) # LEDs are just regular IOs
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self.led.off()
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self._idx = idx
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self._debounce_time = debounce
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self._changed = time.ticks_ms()
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self._last_value = None
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def read(self):
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value = self.raw()
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if value != self._last_value and time.ticks_ms() - self._changed > self._debounce_time:
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self._last_value = value
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self._changed = time.ticks_ms()
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return value
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return False
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def raw(self):
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return self.sr[self._idx] == 1
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@property
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def is_pressed(self):
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return self.raw()
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sr = ShiftRegister(SR_CLOCK, SR_LATCH, SR_OUT)
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button_a = Button(sr, 7, LED_A)
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button_b = Button(sr, 6, LED_B)
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button_c = Button(sr, 5, LED_C)
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button_d = Button(sr, 4, LED_D)
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button_e = Button(sr, 3, LED_E)
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