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114 lines
4.4 KiB
114 lines
4.4 KiB
libopencm3 Documentation
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12 October 2012 (C) K Sarkies
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-----------------------------
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Each family and subfamily of devices has a separate directory and configuration
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files. Doxygen is run independently on each of these and the result is
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integrated under a single HTML page. LaTeX and pdf files are produced
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separately. Due to relative referencing used in the files, the directory
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structure is important and should be maintained.
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Each of the subdirectories has a configuration file, a layout file and
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subdirectories for the documentation. Doxygen is intended to be run inside
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these subdirectories. The Makefile will handle this in the appropriate
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order.
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Markup
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------
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Each family has been given a group name that will allow subgrouping of API
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functions and defines in the documentation.
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The header and source files for each peripheral in each family must have a
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heading section in which an @defgroup defines the group name for the particular
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peripheral. This group name will be the same across all families as each one
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is documented separately. Thus for a peripheral xxx the header will have a
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group name xxx_defines and the source file will have xxx_file. This will allow
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the group to appear separately. An @ingroup must be provided to place the group
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as a subgroup of the appropriate family grouping. Note that @file is not used.
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The heading section must include the version number and date and authors names
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plus a license reference. Any documentation specific to the family can be
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included here. If there are common files included then their documentation will
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appear in a separate section.
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Common header and source files that are included into a number of families must
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have an @addgroup to include its documentation into the appropriate peripheral
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group. These headings may include authors and any specific descriptions but the
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date and version number must be omitted as it will be included from the family
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files. There must not be any reference to family groupings as these common files
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will be incorporated into multiple family groups.
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The common files should not be included in an application explicitly. Also the
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doxygen preprocessor must be enabled to ensure that all macros and defines are
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included. This means that common header files need to have a section at the top
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of the file of the type (eg for gpio_common_f24.h):
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/** @cond */
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#ifdef LIBOPENCM3_GPIO_H
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/** @endcond */
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and at the end of the file:
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/** @cond */
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#else
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#warning "gpio_common_f24.h should not be included explicitly, only via gpio.h"
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#endif
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/** @endcond */
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This will stop the compiler preprocessor from including the common header file
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unless the device family header file has also been included. The doxygen
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conditional clauses are needed to stop the doxygen preprocessor seeing this
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statement and so excluding processing of the common file contents.
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/** @cond */
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#if defined(LIBOPENCM3_GPIO_H) || defined(LIBOPENCM3_GPIO_COMMON_F24_H)
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/** @endcond */
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Each helper function must have a header with an @brief, and where appropriate
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additional description, @parameter and @return elements. These latter must
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describe the allowable parameter ranges preferably with reference to a suitable
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define in the corresponding header file.
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The Doxyfile for a family must include input files from the header and source
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subdirectories, as well as all needed common files. The common files can be
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added separately or as an entire directory with exclusions of inappropriate
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files.
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Doxyfiles
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---------
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Doxyfile_common holds global settings.
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OUTPUT_DIRECTORY blank so that the output is placed in the current directory.
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RECURSIVE = NO
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EXTERNAL_GROUPS = NO
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Each Doxyfile_include for a processor family has:
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@INCLUDE = ../Doxyfile_common
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INPUT = specific directories needed, including /include/libopencm3/cm3
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in top directory to set the top level page and GNU license.
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LAYOUT_FILE = DoxygenLayout_$processor.xml
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WARN_LOGFILE = doxygen_$processor.log
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TAGFILES = ../cm3/cm3.tag=../../cm3/html
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GENERATE_TAGFILE = $processor.tag
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PREDEFINED = list of macro definitions
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For the top level Doxyfile
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INPUT = ../include/libopencm3/docmain.dox to add in the main page text
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LAYOUT_FILE = DoxygenLayout.xml
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WARN_LOGFILE = doxygen.log
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TAGFILES = cm3/cm3.tag=../cm3/html plus all families to be included.
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Generation of PDF
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-----------------
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The needs for pdf documents differ from HTML so separate Doxyfile_latex
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files are provided.
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@INCLUDE = ../Doxyfile_common
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GENERATE_LATEX = YES
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GENERATE_HTML = NO
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