raspberrypinixie.py 文件源码

def _int_to_bcd(value):
    # type: (Optional[int]) -> Tuple[bool, bool, bool, bool]
    """Converts an integer to a tuple representing the input bits to a BCD.

    If the input value is None, an all high output will be produced. This will
    typically make the BCD to turn its corresponding output off.

    Args:
        value: The value to be converted.

    Returns:
        tuple of bool corresponding to the BCD representation of the
        inputted value.
    """
    if value is None:
        output = (GPIO.HIGH,) * 4
    elif 0 <= value <= 9:
        output = tuple(int(digit, 2) for digit in "{:04b}".format(value))
        assert len(output) == 4
    else:
        raise ValueError("Specified input must be either None or between "
                         "0 and 9. Input was: {!r}.".format(value))
    logger.debug("Converted %s to %s", value, output)
    return output