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Gerard Marull-Paretas aa0a7dfa92 samples: task_wdt: improve device usage When no hardware device is available, set WDT_NODE to DT_INVALID_NODE. Also switch to a single initializer using DEVICE_DT_GET_OR_NULL so that we can constify the pointer. Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>		2022-08-22 17:08:26 +02:00
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src	…
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _task_wdt_sample:

Task Watchdog Sample
####################

Overview
********

This sample allows to test the task watchdog subsystem.

Building and Running
********************

It should be possible to build and run the task watchdog sample on almost any
board. If a hardware watchdog is defined in the devicetree, it is used as a
fallback. Otherwise the task watchdog will run independently.

Building and Running for ST Nucleo L073RZ
=========================================
The sample can be built and executed for the
:ref:`nucleo_l073rz_board` as follows:

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/task_wdt
   :board: nucleo_l073rz
   :goals: build flash
   :compact:

For other boards just replace the board name.

Sample output
=============

The following output is printed and continuously repeated (after each
reset):

.. code-block:: console

   Task watchdog sample application.
   Main thread still alive...
   Control thread started.
   Main thread still alive...
   Main thread still alive...
   Main thread still alive...
   Control thread getting stuck...
   Main thread still alive...
   Task watchdog channel 1 callback, thread: control
   Resetting device...