50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
"""
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Simple Keypad
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Micropython library for the Simple Keypad
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=======================================================
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#Based on Author: 'Teeraphat Kullanankanjana'
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@dahanzimin From the Mixly Team
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"""
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from machine import Pin
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from time import sleep
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class Keypad:
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def __init__(self, row_pins, column_pins, keys):
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"""Initialize the keypad object."""
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if not all(isinstance(pin, Pin) for pin in row_pins):
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raise ValueError("Row pins must be instances of Pin.")
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if not all(isinstance(pin, Pin) for pin in column_pins):
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raise ValueError("Column pins must be instances of Pin.")
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if not isinstance(keys, list) or not all(isinstance(row, list) for row in keys):
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raise ValueError("Keys must be a 2D list.")
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self.row_pins = row_pins
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self.column_pins = column_pins
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self.keys = keys
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for pin in self.row_pins:
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pin.init(Pin.IN, Pin.PULL_UP)
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for pin in self.column_pins:
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pin.init(Pin.OUT)
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if len(self.row_pins) > len(self.keys) or len(self.column_pins) > len(self.keys[0]):
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raise ValueError("Number of row/column pins does not match the key layout size.")
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def read_keypad(self):
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"""Read the keypad and return the pressed key."""
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for col_pin in self.column_pins:
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col_pin.value(0)
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for i, row_pin in enumerate(self.row_pins):
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if not row_pin.value():
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key_pressed = self.keys[i][self.column_pins.index(col_pin)]
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col_pin.value(1)
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return key_pressed
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col_pin.value(1)
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return None
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