fsfw/docs/getting_started.rst
Robin Mueller c2bf09d506 Introducing documentation with Sphinx
This PR introduces the generation of documentation based on
this excellent blog post: https://devblogs.microsoft.com/cppblog/clear-functional-c-documentation-with-sphinx-breathe-doxygen-cmake/

It combines the tools Sphinx, Doxygen and Breathe to generate good
looking HTML documentation conveniently which can be hosted easily.

The helper scripts were unified and there is now one helper.py script
which can be used to create, build and open both tests and documentation.
"./helper.py -h" can be used to get the different options.

This PR also contains some smaller fixes which were necessary for the docs
to build
2021-12-01 11:17:28 +01:00

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4.5 KiB
ReStructuredText

Getting Started
================
Getting started
----------------
The `Hosted FSFW example`_ provides a good starting point and a demo to see the FSFW capabilities.
It is recommended to get started by building and playing around with the demo application.
There are also other examples provided for all OSALs using the popular embedded platforms
Raspberry Pi, Beagle Bone Black and STM32H7.
Generally, the FSFW is included in a project by providing
a configuration folder, building the static library and linking against it.
There are some functions like ``printChar`` which are different depending on the target architecture
and need to be implemented by the mission developer.
A template configuration folder was provided and can be copied into the project root to have
a starting point. The [configuration section](docs/README-config.md#top) provides more specific
information about the possible options.
Adding the library
-------------------
The following steps show how to add and use FSFW components. It is still recommended to
try out the example mentioned above to get started, but the following steps show how to
add and link against the FSFW library in general.
1. Add this repository as a submodule
.. code-block:: console
git submodule add https://egit.irs.uni-stuttgart.de/fsfw/fsfw.git fsfw
2. Add the following directive inside the uppermost ``CMakeLists.txt`` file of your project
.. code-block:: cmake
add_subdirectory(fsfw)
3. Make sure to provide a configuration folder and supply the path to that folder with
the `FSFW_CONFIG_PATH` CMake variable from the uppermost `CMakeLists.txt` file.
It is also necessary to provide the `printChar` function. You can find an example
implementation for a hosted build
`here <https://egit.irs.uni-stuttgart.de/fsfw/fsfw-example-hosted/src/branch/master/bsp_hosted/utility/printChar.c>`_.
4. Link against the FSFW library
.. code-block:: cmake
target_link_libraries(<YourProjectName> PRIVATE fsfw)
5. It should now be possible use the FSFW as a static library from the user code.
Building the unittests
-------------------------
The FSFW also has unittests which use the `Catch2 library`_.
These are built by setting the CMake option ``FSFW_BUILD_UNITTESTS`` to ``ON`` or `TRUE`
from your project `CMakeLists.txt` file or from the command line.
The fsfw-tests binary will be built as part of the static library and dropped alongside it.
If the unittests are built, the library and the tests will be built with coverage information by
default. This can be disabled by setting the `FSFW_TESTS_COV_GEN` option to `OFF` or `FALSE`.
You can use the following commands inside the ``fsfw`` folder to set up the build system
.. code-block:: console
mkdir build-tests && cd build-tests
cmake -DFSFW_BUILD_UNITTESTS=ON -DFSFW_OSAL=host ..
You can also use ``-DFSFW_OSAL=linux`` on Linux systems.
Coverage data in HTML format can be generated using the `Code coverage`_ CMake module.
To build the unittests, run them and then generare the coverage data in this format,
the following command can be used inside the build directory after the build system was set up
.. code-block:: console
cmake --build . -- fsfw-tests_coverage -j
The ``helper.py`` script located in the ``script`` folder can also be used to create, build
and open the unittests conveniently. Try ``helper.py -h`` for more information.
Building the documentation
----------------------------
The FSFW documentation is built using the tools Sphinx, doxygen and breathe based on the
instructions provided in `this blogpost <https://devblogs.microsoft.com/cppblog/clear-functional-c-documentation-with-sphinx-breathe-doxygen-cmake/>`_. You can set up a
documentation build system using the following commands
.. code-block:: bash
mkdir build-docs && cd build-docs
cmake -DFSFW_BUILD_DOCS=ON -DFSFW_OSAL=host ..
Then you can generate the documentation using
.. code-block:: bash
cmake --build . -j
You can find the generated documentation inside the ``docs/sphinx`` folder inside the build
folder. Simply open the ``index.html`` in the webbrowser of your choice.
The ``helper.py`` script located in the ``script`` folder can also be used to create, build
and open the documentation conveniently. Try ``helper.py -h`` for more information.
.. _`Hosted FSFW example`: https://egit.irs.uni-stuttgart.de/fsfw/fsfw-example-hosted
.. _`Catch2 library`: https://github.com/catchorg/Catch2
.. _`Code coverage`: https://github.com/bilke/cmake-modules/tree/master