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https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git
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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>
43 lines
1.3 KiB
Python
Executable File
43 lines
1.3 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 watching for edges on multiple lines."""
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import gpiod
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from gpiod.line import Edge
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def edge_type_str(event):
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if event.event_type is event.Type.RISING_EDGE:
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return "Rising"
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if event.event_type is event.Type.FALLING_EDGE:
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return "Falling"
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return "Unknown"
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def watch_multiple_line_values(chip_path, line_offsets):
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with gpiod.request_lines(
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chip_path,
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consumer="watch-multiple-line-values",
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config={tuple(line_offsets): gpiod.LineSettings(edge_detection=Edge.BOTH)},
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) as request:
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while True:
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for event in request.read_edge_events():
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print(
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"offset: {} type: {:<7} event #{} line event #{}".format(
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event.line_offset,
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edge_type_str(event),
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event.global_seqno,
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event.line_seqno,
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)
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)
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if __name__ == "__main__":
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try:
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watch_multiple_line_values("/dev/gpiochip0", [5, 3, 7])
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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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