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# SPDX-License-Identifier: LGPL-2.1-or-later
# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@bgdev.pl>
from . import _ext
from enum import Enum
__all__ = ["Value", "Direction", "Bias", "Drive", "Edge", "Clock"]
class Value(Enum):
"""Logical line states."""
INACTIVE = _ext.VALUE_INACTIVE
"""Line is logically inactive."""
ACTIVE = _ext.VALUE_ACTIVE
"""Line is logically active."""
def __bool__(self):
return self == self.ACTIVE
class Direction(Enum):
"""Direction settings."""
AS_IS = _ext.DIRECTION_AS_IS
"""Request the line(s), but don't change direction."""
INPUT = _ext.DIRECTION_INPUT
"""Direction is input - for reading the value of an externally driven GPIO line."""
OUTPUT = _ext.DIRECTION_OUTPUT
"""Direction is output - for driving the GPIO line."""
class Bias(Enum):
"""Internal bias settings."""
AS_IS = _ext.BIAS_AS_IS
"""Don't change the bias setting when applying line config."""
UNKNOWN = _ext.BIAS_UNKNOWN
"""The internal bias state is unknown."""
DISABLED = _ext.BIAS_DISABLED
"""The internal bias is disabled."""
PULL_UP = _ext.BIAS_PULL_UP
"""The internal pull-up bias is enabled."""
PULL_DOWN = _ext.BIAS_PULL_DOWN
"""The internal pull-down bias is enabled."""
class Drive(Enum):
"""Drive settings."""
PUSH_PULL = _ext.DRIVE_PUSH_PULL
"""Drive setting is push-pull."""
OPEN_DRAIN = _ext.DRIVE_OPEN_DRAIN
"""Line output is open-drain."""
OPEN_SOURCE = _ext.DRIVE_OPEN_SOURCE
"""Line output is open-source."""
class Edge(Enum):
"""Edge detection settings."""
NONE = _ext.EDGE_NONE
"""Line edge detection is disabled."""
RISING = _ext.EDGE_RISING
"""Line detects rising edge events."""
FALLING = _ext.EDGE_FALLING
"""Line detects falling edge events."""
BOTH = _ext.EDGE_BOTH
"""Line detects both rising and falling edge events."""
class Clock(Enum):
"""Event clock settings."""
MONOTONIC = _ext.CLOCK_MONOTONIC
"""Line uses the monotonic clock for edge event timestamps."""
REALTIME = _ext.CLOCK_REALTIME
"""Line uses the realtime clock for edge event timestamps."""
HTE = _ext.CLOCK_HTE
"""Line uses the hardware timestamp engine for event timestamps."""
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