Brings SMF framework closer into alignment with accepted Hierarchical State
Machine operation by:
1. Allowing 'programming by difference' by having some child states handle
events and prevent propagation up to the parent run actions while others
propagate events up to a common handler in a parent state.
2. Optionally allow initial transitions within a parent state to determine
the most nested child state to transition to.
3. Adding a test case for `CONFIG_SMF_INITIAL_TRANSITION` and
`smf_set_handled()`
4. Updating documentation for the new API (and fixing some references)
There was discussion in https://github.com/zephyrproject-rtos/zephyr/issues/55344
about not making the initial transition a Kconfig option, but I'm not sure
of any way else of doing it without permanently adding a pointer to each
`smf_state` entry, which is a problem for resource-constrained devices.
This does not fix https://github.com/zephyrproject-rtos/zephyr/issues/66341
but documentation has been updated to warn users of the issue.
Signed-off-by: Glenn Andrews <glenn.andrews.42@gmail.com>
As of today <zephyr/zephyr.h> is 100% equivalent to <zephyr/kernel.h>.
This patch proposes to then include <zephyr/kernel.h> instead of
<zephyr/zephyr.h> since it is more clear that you are including the
Kernel APIs and (probably) nothing else. <zephyr/zephyr.h> sounds like a
catch-all header that may be confusing. Most applications need to
include a bunch of other things to compile, e.g. driver headers or
subsystem headers like BT, logging, etc.
The idea of a catch-all header in Zephyr is probably not feasible
anyway. Reason is that Zephyr is not a library, like it could be for
example `libpython`. Zephyr provides many utilities nowadays: a kernel,
drivers, subsystems, etc and things will likely grow. A catch-all header
would be massive, difficult to keep up-to-date. It is also likely that
an application will only build a small subset. Note that subsystem-level
headers may use a catch-all approach to make things easier, though.
NOTE: This patch is **NOT** removing the header, just removing its usage
in-tree. I'd advocate for its deprecation (add a #warning on it), but I
understand many people will have concerns.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add a bunch of missing "zephyr/" prefixes to #include statements in
various test and test framework files.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
In order to bring consistency in-tree, migrate all tests to the new
prefix <zephyr/...>. Note that the conversion has been scripted, refer
to #45388 for more details.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add an application agnostic State Machine Framework library to
Zephyr that provides an easy way for developers to integrate
state machines into their application.
Twister passed:
twister -T tests/lib/smf/
Signed-off-by: Sam Hurst <sbh1187@gmail.com>
