mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-11-04 02:59:01 +01:00
193 lines
7.4 KiB
Markdown
193 lines
7.4 KiB
Markdown
[](https://github.com/FreeRTOS/FreeRTOS-Kernel/actions/workflows/unit-tests.yml?query=branch%3Amain+event%3Apush+workflow%3A%22CMock+Unit+Tests%22++)
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[](https://codecov.io/gh/FreeRTOS/FreeRTOS-Kernel)
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## Getting started
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This repository contains FreeRTOS kernel source/header files and kernel
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ports only. This repository is referenced as a submodule in
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[FreeRTOS/FreeRTOS](https://github.com/FreeRTOS/FreeRTOS)
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repository, which contains pre-configured demo application projects under
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```FreeRTOS/Demo``` directory.
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The easiest way to use FreeRTOS is to start with one of the pre-configured demo
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application projects. That way you will have the correct FreeRTOS source files
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included, and the correct include paths configured. Once a demo application is
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building and executing you can remove the demo application files, and start to
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add in your own application source files. See the
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[FreeRTOS Kernel Quick Start Guide](https://www.freertos.org/Documentation/01-FreeRTOS-quick-start/01-Beginners-guide/02-Quick-start-guide)
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for detailed instructions and other useful links.
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Additionally, for FreeRTOS kernel feature information refer to the
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[Developer Documentation](https://www.freertos.org/Documentation/02-Kernel/02-Kernel-features/00-Developer-docs),
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and [API Reference](https://www.freertos.org/Documentation/02-Kernel/04-API-references/01-Task-creation/00-TaskHandle).
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Also for contributing and creating a Pull Request please refer to
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[the instructions here](.github/CONTRIBUTING.md#contributing-via-pull-request).
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**FreeRTOS-Kernel V11.1.0
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[source code](https://github.com/FreeRTOS/FreeRTOS-Kernel/tree/V11.1.0) is part
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of the
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[FreeRTOS 202406.00 LTS](https://github.com/FreeRTOS/FreeRTOS-LTS/tree/202406-LTS)
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release.**
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### Getting help
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If you have any questions or need assistance troubleshooting your FreeRTOS project,
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we have an active community that can help on the
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[FreeRTOS Community Support Forum](https://forums.freertos.org).
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## To consume FreeRTOS-Kernel
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### Consume with CMake
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If using CMake, it is recommended to use this repository using FetchContent.
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Add the following into your project's main or a subdirectory's `CMakeLists.txt`:
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- Define the source and version/tag you want to use:
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```cmake
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FetchContent_Declare( freertos_kernel
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GIT_REPOSITORY https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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GIT_TAG main #Note: Best practice to use specific git-hash or tagged version
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)
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```
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In case you prefer to add it as a git submodule, do:
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```bash
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git submodule add https://github.com/FreeRTOS/FreeRTOS-Kernel.git <path of the submodule>
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git submodule update --init
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```
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- Add a freertos_config library (typically an INTERFACE library) The following assumes the directory structure:
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- `include/FreeRTOSConfig.h`
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```cmake
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add_library(freertos_config INTERFACE)
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target_include_directories(freertos_config SYSTEM
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INTERFACE
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include
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)
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target_compile_definitions(freertos_config
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INTERFACE
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projCOVERAGE_TEST=0
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)
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```
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In case you installed FreeRTOS-Kernel as a submodule, you will have to add it as a subdirectory:
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```cmake
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add_subdirectory(${FREERTOS_PATH})
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```
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- Configure the FreeRTOS-Kernel and make it available
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- this particular example supports a native and cross-compiled build option.
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```cmake
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set( FREERTOS_HEAP "4" CACHE STRING "" FORCE)
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# Select the native compile PORT
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set( FREERTOS_PORT "GCC_POSIX" CACHE STRING "" FORCE)
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# Select the cross-compile PORT
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if (CMAKE_CROSSCOMPILING)
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set(FREERTOS_PORT "GCC_ARM_CA9" CACHE STRING "" FORCE)
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endif()
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FetchContent_MakeAvailable(freertos_kernel)
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```
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- In case of cross compilation, you should also add the following to `freertos_config`:
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```cmake
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target_compile_definitions(freertos_config INTERFACE ${definitions})
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target_compile_options(freertos_config INTERFACE ${options})
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```
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### Consuming stand-alone - Cloning this repository
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To clone using HTTPS:
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```
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git clone https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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```
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Using SSH:
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```
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git clone git@github.com:FreeRTOS/FreeRTOS-Kernel.git
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```
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## Repository structure
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- The root of this repository contains the three files that are common to
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every port - list.c, queue.c and tasks.c. The kernel is contained within these
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three files. croutine.c implements the optional co-routine functionality - which
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is normally only used on very memory limited systems.
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- The ```./portable``` directory contains the files that are specific to a particular microcontroller and/or compiler.
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See the readme file in the ```./portable``` directory for more information.
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- The ```./include``` directory contains the real time kernel header files.
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- The ```./template_configuration``` directory contains a sample `FreeRTOSConfig.h` to help jumpstart a new project.
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See the [FreeRTOSConfig.h](examples/template_configuration/FreeRTOSConfig.h) file for instructions.
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### Code Formatting
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FreeRTOS files are formatted using the
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"[uncrustify](https://github.com/uncrustify/uncrustify)" tool.
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The configuration file used by uncrustify can be found in the
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[FreeRTOS/CI-CD-GitHub-Actions's](https://github.com/FreeRTOS/CI-CD-Github-Actions)
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[uncrustify.cfg](https://github.com/FreeRTOS/CI-CD-Github-Actions/tree/main/formatting)
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file.
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### Line Endings
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File checked into the FreeRTOS-Kernel repository use unix-style LF line endings
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for the best compatibility with git.
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For optimal compatibility with Microsoft Windows tools, it is best to enable
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the git autocrlf feature. You can enable this setting for the current
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repository using the following command:
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```
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git config core.autocrlf true
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```
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### Git History Optimizations
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Some commits in this repository perform large refactors which touch many lines
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and lead to unwanted behavior when using the `git blame` command. You can
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configure git to ignore the list of large refactor commits in this repository
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with the following command:
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```
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git config blame.ignoreRevsFile .git-blame-ignore-revs
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```
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### Spelling and Formatting
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We recommend using [Visual Studio Code](https://code.visualstudio.com),
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commonly referred to as VSCode, when working on the FreeRTOS-Kernel.
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The FreeRTOS-Kernel also uses [cSpell](https://cspell.org/) as part of its
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spelling check. The config file for which can be found at [cspell.config.yaml](cspell.config.yaml)
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There is additionally a
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[cSpell plugin for VSCode](https://marketplace.visualstudio.com/items?itemName=streetsidesoftware.code-spell-checker)
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that can be used as well.
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*[.cSpellWords.txt](.github/.cSpellWords.txt)* contains words that are not
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traditionally found in an English dictionary. It is used by the spellchecker
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to verify the various jargon, variable names, and other odd words used in the
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FreeRTOS code base are correct. If your pull request fails to pass the spelling
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and you believe this is a mistake, then add the word to
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*[.cSpellWords.txt](.github/.cSpellWords.txt)*. When adding a word please
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then sort the list, which can be done by running the bash command:
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`sort -u .cSpellWords.txt -o .cSpellWords.txt`
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Note that only the FreeRTOS-Kernel Source Files, [include](include),
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[portable/MemMang](portable/MemMang), and [portable/Common](portable/Common)
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files are checked for proper spelling, and formatting at this time.
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## Third Party Tools
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Visit [this link](.github/third_party_tools.md) for detailed information about
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third-party tools with FreeRTOS support.
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