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104 lines
4.8 KiB
ReStructuredText
104 lines
4.8 KiB
ReStructuredText
API Documentation Template
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==========================
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.. note::
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*INSTRUCTIONS*
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1. Use this file (:idf_file:`docs/en/api-reference/template.rst`) as a template to document API.
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2. Change the file name to the name of the header file that represents documented API.
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3. Include respective files with descriptions from the API folder using ``..include::``
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* README.rst
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* example.rst
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* ...
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4. Optionally provide description right in this file.
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5. Once done, remove all instructions like this one and any superfluous headers.
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Overview
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--------
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.. note::
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*INSTRUCTIONS*
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1. Provide overview where and how this API may be used.
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2. Where applicable include code snippets to illustrate functionality of particular functions.
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3. To distinguish between sections, use the following `heading levels <http://www.sphinx-doc.org/en/stable/rest.html#sections>`_:
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* ``#`` with overline, for parts
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* ``*`` with overline, for chapters
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* ``=``, for sections
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* ``-``, for subsections
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* ``^``, for subsubsections
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* ``"``, for paragraphs
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Application Example
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-------------------
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.. note::
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*INSTRUCTIONS*
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1. Prepare one or more practical examples to demonstrate functionality of this API.
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2. Each example should follow pattern of projects located in ``esp-idf/examples/`` folder.
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3. Place example in this folder complete with ``README.md`` file.
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4. Provide overview of demonstrated functionality in ``README.md``.
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5. With good overview reader should be able to understand what example does without opening the source code.
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6. Depending on complexity of example, break down description of code into parts and provide overview of functionality of each part.
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7. Include flow diagram and screenshots of application output if applicable.
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8. Finally add in this section synopsis of each example together with link to respective folder in ``esp-idf/examples/``.
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API Reference
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-------------
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.. highlight:: none
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.. note::
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*INSTRUCTIONS*
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1. This repository provides for automatic update of API reference documentation using :doc:`code markup retrieved by Doxygen from header files <../contribute/documenting-code>`.
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1. Update is done on each documentation build by invoking Sphinx extension :idf_file:`docs/idf_extensions/run_doxygen.py` for all header files listed in the ``INPUT`` statement of :idf_file:`docs/doxygen/Doxyfile_common`.
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1. Each line of the ``INPUT`` statement (other than a comment that begins with ``##``) contains a path to header file ``*.h`` that will be used to generate corresponding ``*.inc`` files::
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##
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## Wi-Fi - API Reference
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##
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../components/esp32/include/esp_wifi.h \
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../components/esp32/include/esp_smartconfig.h \
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1. When the headers are expanded, any macros defined by default in ``sdkconfig.h`` as well as any macros defined in SOC-specific ``include/soc/*_caps.h`` headers will be expanded. This allows the headers to include/exclude material based on the ``IDF_TARGET`` value.
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1. The ``*.inc`` files contain formatted reference of API members generated automatically on each documentation build. All ``*.inc`` files are placed in Sphinx ``_build`` directory. To see directives generated for e.g. ``esp_wifi.h``, run ``python gen-dxd.py esp32/include/esp_wifi.h``.
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1. To show contents of ``*.inc`` file in documentation, include it as follows::
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.. include-build-file:: inc/esp_wifi.inc
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For example see :idf_file:`docs/en/api-reference/network/esp_wifi.rst`
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1. Optionally, rather that using ``*.inc`` files, you may want to describe API in you own way. See :idf_file:`docs/en/api-guides/ulp.rst` for example.
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Below is the list of common ``.. doxygen...::`` directives:
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* Functions - ``.. doxygenfunction:: name_of_function``
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* Unions -``.. doxygenunion:: name_of_union``
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* Structures -``.. doxygenstruct:: name_of_structure`` together with ``:members:``
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* Macros - ``.. doxygendefine:: name_of_define``
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* Type Definitions - ``.. doxygentypedef:: name_of_type``
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* Enumerations - ``.. doxygenenum:: name_of_enumeration``
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See `Breathe documentation <https://breathe.readthedocs.io/en/latest/directives.html>`_ for additional information.
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To provide a link to header file, use the :ref:`link custom role <link-custom-roles>` as follows::
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* :component_file:`path_to/header_file.h`
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1. In any case, to generate API reference, the file :idf_file:`docs/doxygen/Doxyfile_common` should be updated with paths to ``*.h`` headers that are being documented.
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1. When changes are committed and documentation is build, check how this section has been rendered. :doc:`Correct annotations <../contribute/documenting-code>` in respective header files, if required.
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