doc: gsg: Add a note about blinky

Add a note that describes the fact that blinky does not run on all
boards supported by Zephyr, and propose an alternative (Hello World) for
those boards.

Fixes #23169.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
This commit is contained in:
Carles Cufi 2020-03-04 18:22:03 +01:00 committed by Johan Hedberg
commit cf2d474adf

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@ -361,6 +361,12 @@ The sample :ref:`blinky-sample` blinks an LED on the target board. By
building and running it, we can verify that the environment and tools
are properly set up for Zephyr development.
.. note:: This sample is compatible with most boards supported by
Zephyr, but not all of them. See the :ref:`blinky sample requirements
<blinky-sample-requirements>` for more information. If this sample is not
compatible with your board, a good alternative to try is the
:ref:`Hello World sample <hello_world>`.
#. Set build environment variables:
.. tabs::