Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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chengdong wang df3fe0e16f Revert "sched/signal: Unblock task waiting for event when a signal received"
Events are not defined in the POSIX standard, so signals are not required
to wake tasks that are in the TSTATE_WAIT_EVENT state.

Signed-off-by: Chengdong Wang wangchengdong@lixiang.com
2025-11-24 11:00:23 -03:00
.github build(deps): bump actions/download-artifact from 5 to 6 2025-10-27 19:47:03 +08:00
arch arch/arm/{nrf52|nrf53|nrf91}/i2c: fix I2C bus getting stuck during read 2025-11-24 14:57:10 +01:00
audio fs/file: unify prefix about file_xxx api, like file_open, file_ioctl 2025-06-12 18:12:42 +08:00
binfmt binfmt: Add a configuration flag to store the module filename 2025-11-01 22:59:47 +08:00
boards boards/arm: refresh the defconfig. 2025-11-24 19:43:07 +08:00
cmake CMake: Enable Kconfig generation for external directories 2025-11-20 19:16:05 +08:00
crypto crypto/hmac: Fix typo in function implementation names 2025-08-13 23:11:02 +08:00
Documentation Documentation/drivers/timers: Add information about timers. 2025-11-24 19:43:07 +08:00
drivers drivers/timers: Fix oneshot callback arg. 2025-11-24 19:43:07 +08:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs/fs.h: Add register_driver_with_size function 2025-11-13 08:57:52 -03:00
graphics sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
include nuttx/can: add message alignment 2025-11-24 14:11:41 +08:00
libs style/FAR: remove FAR qualifier 2025-11-10 10:56:29 +01:00
mm mm/: remove reference to non-existent readme 2025-10-11 17:07:51 -04:00
net net_bufpool.c:when timeout value is zero,It don't break netlock 2025-11-10 22:30:37 -05:00
openamp sched/clock: remove return value of clock_systime_timespec() 2025-10-10 23:15:27 +08:00
pass1 Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
sched Revert "sched/signal: Unblock task waiting for event when a signal received" 2025-11-24 11:00:23 -03:00
syscall sched/gettid: Move thread ID to TLS 2025-04-08 22:53:10 +08:00
tools tools/checkpatch.sh: Improved error display on GitHub 2025-11-14 16:50:25 -03:00
video Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
wireless sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
.codespellrc codespellrc: add ist to ignorelist 2025-10-14 17:42:01 +08:00
.editorconfig .editorconfig: add .editorconfig file to help maintain coding style 2025-08-28 21:53:16 +08:00
.gitignore gitignore: add more vim swap files 2025-06-18 15:44:51 -04:00
.gitmessage docs/contributing: Add a commit message template 2025-06-03 17:33:24 +08:00
.pre-commit-config.yaml pre-commit: enable codespell checks 2025-05-05 12:34:39 +08:00
.yamllint
AUTHORS AUTHORS: add Simone Falsetti 2025-07-15 15:12:44 -03:00
CMakeLists.txt nuttx/cmake: Remove redundant logic in CMake scripts 2025-10-20 10:08:28 +08:00
CONTRIBUTING.md style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
INVIOLABLES.md
Kconfig docs/config: Wrong term. 2025-10-23 16:46:31 +08:00
LICENSE style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
Makefile tools: migrate to SPDX identifier 2024-09-10 23:11:11 +08:00
NOTICE
README.md Gathering community recommendations 2023-10-28 13:55:56 +08:00
ReleaseNotes Documentation: move ReleaseNotes 2023-09-26 20:41:00 +08:00

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.

Getting Started

First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.

Documentation

You can find the current NuttX documentation on the Documentation Page.

Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.

The old NuttX documentation is still available in the Apache wiki.

Supported Boards

NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.

Contributing

If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.

License

The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.