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# SPDX-License-Identifier: GPL-2.0-or-later
# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@bgdev.pl>
from . import _ext
from enum import Enum
from typing import Optional
class Chip:
"""
Represents a simulated GPIO chip.
"""
class Pull(Enum):
DOWN = _ext.PULL_DOWN
UP = _ext.PULL_UP
class Value(Enum):
INACTIVE = _ext.VALUE_INACTIVE
ACTIVE = _ext.VALUE_ACTIVE
class Direction(Enum):
INPUT = _ext.DIRECTION_INPUT
OUTPUT_HIGH = _ext.DIRECTION_OUTPUT_HIGH
OUTPUT_LOW = _ext.DIRECTION_OUTPUT_LOW
def __init__(
self,
label: Optional[str] = None,
num_lines: Optional[int] = None,
line_names: Optional[dict[int, str]] = None,
hogs: Optional[dict[int, tuple[str, Direction]]] = None,
):
self._chip = _ext.Chip()
if label:
self._chip.set_label(label)
if num_lines:
self._chip.set_num_lines(num_lines)
if line_names:
for off, name in line_names.items():
self._chip.set_line_name(off, name)
if hogs:
for off, (name, direction) in hogs.items():
self._chip.set_hog(off, name, direction.value)
self._chip.enable()
def get_value(self, offset: int) -> Value:
val = self._chip.get_value(offset)
return Chip.Value(val)
def set_pull(self, offset: int, pull: Pull) -> None:
self._chip.set_pull(offset, pull.value)
@property
def dev_path(self) -> str:
return self._chip.dev_path
@property
def name(self) -> str:
return self._chip.name
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