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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>
40 lines
1.3 KiB
Python
Executable File
40 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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"""Example of a bi-directional line requested as input and then switched to output."""
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import gpiod
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from gpiod.line import Direction, Value
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def reconfigure_input_to_output(chip_path, line_offset):
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# request the line initially as an input
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with gpiod.request_lines(
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chip_path,
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consumer="reconfigure-input-to-output",
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config={line_offset: gpiod.LineSettings(direction=Direction.INPUT)},
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) as request:
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# read the current line value
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value = request.get_value(line_offset)
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print("{}={} (input)".format(line_offset, value))
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# switch the line to an output and drive it low
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request.reconfigure_lines(
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config={
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line_offset: gpiod.LineSettings(
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direction=Direction.OUTPUT, output_value=Value.INACTIVE
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)
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}
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)
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# report the current driven value
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value = request.get_value(line_offset)
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print("{}={} (output)".format(line_offset, value))
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if __name__ == "__main__":
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try:
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reconfigure_input_to_output("/dev/gpiochip0", 5)
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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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