bindings: cxx: examples: fix potential glitch in gpiosetcxx

gpiosetcxx requests lines without setting their output value, and so
sets them all inactive, and subsequently sets them to their requested
value. This can result in glitches on lines which were active and
are set active.

As this is example code, it is also important to demonstrate that the
output value can be set by the request itself.

Request the lines with the correct output values set in the request
itself.

Suggested-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Kent Gibson <warthog618@gmail.com>

diff --git a/bindings/cxx/examples/gpiosetcxx.cpp b/bindings/cxx/examples/gpiosetcxx.cpp
index dde53798547fcdd009a157d7699c1c9656ef494a..f46cb856862ef828f7bb71a00b20b1ed9e93d2d9 100644 (file)
--- a/bindings/cxx/examples/gpiosetcxx.cpp
+++ b/bindings/cxx/examples/gpiosetcxx.cpp
@@ -44,10 +44,9 @@ int main(int argc, char **argv)
                        ::gpiod::line_settings()
                                .set_direction(::gpiod::line::direction::OUTPUT)
                )
+               .set_output_values(values)
                .do_request();
 
-       request.set_values(values);
-
        ::std::cin.get();
 
        return EXIT_SUCCESS;