mirror of
https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git
synced 2026-10-25 12:39:18 +03:00
96c52d3e59
Replace tool examples with use case examples drawn from the tools. Signed-off-by: Kent Gibson <warthog618@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
38 lines
1.1 KiB
Python
Executable File
38 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0-or-later
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# SPDX-FileCopyrightText: 2023 Kent Gibson <warthog618@gmail.com>
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"""Minimal example of finding a line with the given name."""
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import gpiod
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import os
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def generate_gpio_chips():
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for entry in os.scandir("/dev/"):
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if gpiod.is_gpiochip_device(entry.path):
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yield entry.path
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def find_line_by_name(line_name):
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# Names are not guaranteed unique, so this finds the first line with
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# the given name.
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for path in generate_gpio_chips():
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with gpiod.Chip(path) as chip:
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try:
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offset = chip.line_offset_from_id(line_name)
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print("{}: {} {}".format(line_name, chip.get_info().name, offset))
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return
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except OSError:
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# An OSError is raised if the name is not found.
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continue
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print("line '{}' not found".format(line_name))
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if __name__ == "__main__":
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try:
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find_line_by_name("GPIO19")
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except OSError as ex:
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print(ex, "\nCustomise the example configuration to suit your situation")
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