bindings: python: examples: fix potential glitch in gpioset.py

gpioset.py 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.

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

diff --git a/bindings/python/examples/gpioset.py b/bindings/python/examples/gpioset.py
index 372a9a8623bf8c35e7f48e44745462fc4e7503bc..0323e3577998bbd6b4ff592f93e62f7ec32b19c1 100755 (executable)
--- a/bindings/python/examples/gpioset.py
+++ b/bindings/python/examples/gpioset.py
@@ -21,16 +21,16 @@ if __name__ == "__main__":
         x, y = arg.split("=")
         return (x, Value(int(y)))
 
+    def make_settings(val):
+        return gpiod.LineSettings(direction=Direction.OUTPUT, output_value=val)
+
     lvs = [parse_value(arg) for arg in sys.argv[2:]]
-    lines = [x[0] for x in lvs]
-    values = dict(lvs)
+    config = dict([(l, make_settings(v)) for (l, v) in lvs])
 
     request = gpiod.request_lines(
         path,
         consumer="gpioset.py",
-        config={tuple(lines): gpiod.LineSettings(direction=Direction.OUTPUT)},
+        config=config,
     )
 
-    vals = request.set_values(values)
-
     input()