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https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git
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753c33142f
While () and (void) are synonymous in C++, we use () everywhere else so stick to that pattern in examples. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
39 lines
940 B
C++
39 lines
940 B
C++
// 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 reading a single line. */
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#include <cstdlib>
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#include <filesystem>
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#include <gpiod.hpp>
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#include <iostream>
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namespace {
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/* Example configuration - customize to suit your situation */
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const ::std::filesystem::path chip_path("/dev/gpiochip0");
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const ::gpiod::line::offset line_offset = 5;
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} /* namespace */
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int main()
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{
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auto request = ::gpiod::chip(chip_path)
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.prepare_request()
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.set_consumer("get-line-value")
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.add_line_settings(
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line_offset,
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::gpiod::line_settings().set_direction(
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::gpiod::line::direction::INPUT))
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.do_request();
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::std::cout << line_offset << "="
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<< (request.get_value(line_offset) ==
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::gpiod::line::value::ACTIVE ?
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"Active" :
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"Inactive")
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<< ::std::endl;
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return EXIT_SUCCESS;
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}
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