56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
"""CircuitPython I2C possible pin-pair identifying script"""
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import board
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import busio
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from microcontroller import Pin
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def is_hardware_i2c(scl, sda):
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try:
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p = busio.I2C(scl, sda)
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p.deinit()
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return True
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except ValueError:
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return False
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except RuntimeError:
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return True
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def get_unique_pins():
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exclude = [
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getattr(board, p)
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for p in [
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# This is not an exhaustive list of unexposed pins. Your results
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# may include other pins that you cannot easily connect to.
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"NEOPIXEL",
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"DOTSTAR_CLOCK",
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"DOTSTAR_DATA",
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"APA102_SCK",
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"APA102_MOSI",
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"LED",
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"SWITCH",
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"BUTTON",
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"ACCELEROMETER_INTERRUPT",
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"VOLTAGE_MONITOR",
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"MICROPHONE_CLOCK",
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"MICROPHONE_DATA",
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]
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if p in dir(board)
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]
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pins = [
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pin
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for pin in [getattr(board, p) for p in dir(board)]
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if isinstance(pin, Pin) and pin not in exclude
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]
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unique = []
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for p in pins:
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if p not in unique:
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unique.append(p)
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return unique
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for scl_pin in get_unique_pins():
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for sda_pin in get_unique_pins():
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if scl_pin is sda_pin:
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continue
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if is_hardware_i2c(scl_pin, sda_pin):
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print("SCL pin:", scl_pin, "\t SDA pin:", sda_pin)
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