71 lines
2.3 KiB
Plaintext
71 lines
2.3 KiB
Plaintext
Application Folder
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==================
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This folder provides various applications found in sub-directories.
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Application entry points with their requirements are gathered together in
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in two files:
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- namedapp/namedapp_proto.h Entry points, prototype function
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- namedapp/namedapp_list.h Application specific information and requirements
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The build occurs in several phases as different build targets are executed:
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(1) contex, (2) depend, and (3) default (all). Application information is
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collected during the make context build phase.
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To execute an application function:
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exec_namedapp() is defined in the nuttx/include/apps/apps.h
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NuttShell provides transparent method of invoking the command, when the
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following option is enabled:
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CONFIG_NSH_BUILTIN_APPS=y
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in the NuttX configuration.
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A special configuration file is used to configure which applications
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are to be included in the build. This file is configs/<board>/<configuration>/appconfig.
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The existence of the appconfig file in the board configuration directory
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is sufficient to enable building of applications.
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The appconfig file is copied into the apps/ directory as .config when
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NuttX is configured. .config is included in the toplevel apps/Makefile.
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As a minimum, this configuration file must define files to add to the
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CONFIGURED_APPS list like:
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CONFIGURED_APPS += hello poweroff jvm
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The form of each entry is <dir>=<dependency> when:
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<dir> is the name of a subdirectory in the apps directory, and
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<dependency> is a make dependency. This will be "touch"-ed each time
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that the sub-directory is rebuilt.
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When the user defines an option:
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CONFIG_BUILTIN_APP_START=<application name>
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that application shall be invoked immediately after system starts.
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Note that application name must be provided in ".." as: "hello",
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will call:
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int hello_main(int argc, char *argv[])
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Application skeleton can be found under the hello sub-directory,
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which shows how an application can be added to the project. One must
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define:
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1. create sub-directory as: appname
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2. provide entry point: appname_main()
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3. set the requirements in the file: Makefile, specially the lines:
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APPNAME = appname
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PRIORITY = SCHED_PRIORITY_DEFAULT
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STACKSIZE = 768
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ASRCS = asm source file list as a.asm b.asm ...
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CSRCS = C source file list as foo1.c foo2.c ..
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4. add application in the apps/Makefile
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