41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
import RPi.GPIO as gpio
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class BoardReader:
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default_gpio_mode = gpio.BCM
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default_row_gpios = [4, 5, 6, 12, 13, 16, 17, 19]
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default_column_gpios = [20, 21, 22, 23, 24, 25, 26, 27]
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def __init__(
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self,
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rows=default_row_gpios,
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columns=default_column_gpios,
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gpio_mode=default_gpio_mode,
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):
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gpio.setmode(gpio_mode)
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gpio.setup(columns, gpio.IN, pull_up_down=gpio.PUD_DOWN)
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gpio.setup(rows, gpio.OUT, initial=gpio.LOW)
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self.columns = columns
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self.rows = rows
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def __del__(self):
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gpio.cleanup()
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def scan(self) -> None:
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print(" a b c d e f g h")
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print(" +---------------+")
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for i, row in enumerate(self.rows):
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print("%d|" % (i + 1), end="")
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gpio.output(row, gpio.HIGH)
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for j, column in enumerate(self.columns):
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if gpio.input(column):
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print("x", end="")
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else:
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print(" ", end="")
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if j == 7:
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print("|", end="")
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else:
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print(" ", end="")
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gpio.output(row, gpio.LOW)
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print("")
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