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51f55b437f
Originally added in 7733b94224.
This filter is not well-formed. It's meant to match nodes like
/leds/led_0 in this DTS:
/ {
aliases {
led0 = &led0;
};
leds {
compatible = "gpio-leds";
led0: led_0 {
gpios = <...>;
label = "LED 0";
};
};
};
Uses look like this:
filter: dt_compat_enabled_with_alias("gpio-leds", "led0")
But notice how the led_0 node doesn't have compatible "gpio-leds";
it's actually the *parent* node that has that compatible.
Replace this with a new filter, dt_enabled_alias_with_parent_compat(),
which is used like this:
filter: dt_enabled_alias_with_parent_compat("led0", "gpio-leds")
This has a name and argument order that makes the meaning of the
filter clearer.
Replace in-tree users with the new filter.
Deprecate the old filter and warn about its use using the standard
logging module.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
.. _blinky-sample: Blinky ###### Overview ******** Blinky is a simple application which blinks an LED forever using the :ref:`GPIO API <gpio_api>`. The source code shows how to configure GPIO pins as outputs, then turn them on and off. See :ref:`pwm-blinky-sample` for a sample which uses the PWM API to blink an LED. .. _blinky-sample-requirements: Requirements ************ You will see this error if you try to build Blinky for an unsupported board: .. code-block:: none Unsupported board: led0 devicetree alias is not defined The board must have an LED connected via a GPIO pin. These are called "User LEDs" on many of Zephyr's :ref:`boards`. The LED must be configured using the ``led0`` :ref:`devicetree <dt-guide>` alias. This is usually done in the :ref:`BOARD.dts file <devicetree-in-out-files>` or a :ref:`devicetree overlay <set-devicetree-overlays>`. Building and Running ******************** Build and flash Blinky as follows, changing ``reel_board`` for your board: .. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: reel_board :goals: build flash :compact: After flashing, the LED starts to blink. Blinky does not print to the console.