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Files for each peripheral (examples given for STM32 GPIO)
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---------------------------------------------------------
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In include/libopencm3/stm32.
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A "dispatch" header to point to the subfamily header (gpio.h)
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In include/libopencm3/stm32/f*
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A file with defines that are specific to the subfamily, and an include of
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needed common header files (gpio.h).
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In include/libopencm3/stm32/common
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A file with defines common to all subfamilies. Includes the cm3 common header
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(gpio_common_all.h).
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In include/libopencm3/stm32/common
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May be one other file with defines common to a subgroup of devices.
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This includes the file common to all (gpio_common_f24.h).
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In lib/stm32/f*
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A file with functions specific to the subfamily. Includes the "dispatch" header
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and any common headers needed (gpio.c).
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In lib/stm32/common
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Has functions common to all subfamilies. Includes the "dispatch" header
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(gpio_common_all.c).
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In lib/stm32/common
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May be one other file with functions common to a group of subfamilies. Includes
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the "dispatch" header and the file common to all (gpio_common_f24.h).
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Makefiles in lib/stm32/f? have the common object files added and the
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common directory added to VPATH.
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NOTE: The common source files MUST have the "dispatch" header so that
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compilation will use the specific defines for the subfamily being compiled.
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These can differ between subfamilies.
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NOTE: The common source files must have a line of the form
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#ifdef LIBOPENCM3_xxx_H
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where xxx is the associated peripheral name. This prevents the common files
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from being included accidentally into a user's application. This however
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causes doxygen to skip processing of the remainder of the file. Thus a
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@cond ... @endcond
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directive must be placed around the statement to prevent doxygen from
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processing it. This works only for doxygen 1.8.4 or later. At the present
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time most distros have an earlier buggy version.
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Documentation
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-------------
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In include/libopencm3/stm32/f*
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A file doc-stm32f*.h contains a definition of the particular family grouping.
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This grouping will appear in the main index of the resulting document with all
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documentation under it.
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All header files for a peripheral (common or otherwise) will subgroup under a
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name which is the same in all families (such as gpio_defines). The peripheral
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header file in include/libopencm3/stm32/f* will then include this group as a
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subgroup under the specific family group. Doxygen is run separately for each
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family so there is no danger of accidentally including the wrong stuff.
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Similarly for the source files for a peripheral which will subgroup under a
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same name (such as gpio_files). The peripheral source file in lib/stm32/f*
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will include this as a subgroup under the specific family group.
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DOXYFILE for a particular family will list the family specific and common files
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(headers and source) that are to be included. The result (in the long run) will
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be that all peripherals will appear under the same family grouping in the
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documentation, even if they are identical over a number of families. That is
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probably most useful to end users who only need to see the documentation for
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one family.
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