Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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wangchengdong 96e8fce4de [EXPERIMENTAL] sched/hrtimer: add SYSTEM_TIME64 dependency
The hrtimer infrastructure only works with 64-bit system timers.
  Add a dependency on SYSTEM_TIME64 in the hrtimer Kconfig.

Signed-off-by: Chengdong Wang <wangchengdong@lixiang.com>
2026-01-08 22:47:16 +08:00
.github github/ci: add support for NTFC 2026-01-04 09:40:12 -03:00
arch cmake: Fix C++ STL toolchain linkage with CONFIG_LIBCXXTOOLCHAIN 2026-01-08 10:19:16 +08:00
audio fs/file: unify prefix about file_xxx api, like file_open, file_ioctl 2025-06-12 18:12:42 +08:00
binfmt sched:use tcb_s inside of task_tcb_s , remove all cast 2025-12-22 17:55:45 +08:00
boards drivers/rpmsg: add rpmsg_test to test rpmsg hold/release rx buffer 2026-01-08 22:44:35 +08:00
cmake cmake: Improve nuttx_generate_kconfig() 2025-12-02 02:45:36 +08:00
crypto LICENSE: update NuttX-PublicDomain SPDX identifier 2025-12-26 19:46:12 +08:00
Documentation build(deps): bump urllib3 from 2.6.0 to 2.6.3 in /Documentation 2026-01-08 09:05:02 +01:00
drivers drivers/rpmsg: add rpmsg_test to test rpmsg hold/release rx buffer 2026-01-08 22:44:35 +08:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs/eventfd/timerfd: update sem next to avoid busy loop 2026-01-02 07:55:37 -03:00
graphics sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
include drivers/rpmsg: add rpmsg_test to test rpmsg hold/release rx buffer 2026-01-08 22:44:35 +08:00
libs libc: Add Kconfig option to disable hex-string to float parsing 2026-01-08 02:37:21 +08:00
mm mm/iob:support iob queue concat to another iob queue 2026-01-01 17:03:29 +08:00
net net/netdev: Fix best prefix in findby 2026-01-08 22:45:16 +08:00
openamp openamp/libmetal: change the libmetal mutex to rmutex to avoid carsh 2026-01-04 21:06:10 +08:00
pass1 Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
sched [EXPERIMENTAL] sched/hrtimer: add SYSTEM_TIME64 dependency 2026-01-08 22:47:16 +08:00
syscall syscall/adjtime: fix minior issue about adjtime and add clock_adjtime to syscall 2025-12-30 10:22:09 -03:00
tools boards/citest: rename run scripts to run.sh 2026-01-04 09:40:12 -03:00
video Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
wireless net/wireless: fix compile warning 2025-12-25 18:05:33 +08:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines net/icmpv6: replace net_lock with conn_lock and conn_lock_dev 2025-12-29 09:42:18 +08:00
.codespellrc codespellrc: add ist to ignorelist 2025-10-14 17:42:01 +08:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +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 feat: add a GitHub action to lint the YAML files 2020-12-15 09:52:04 -06:00
AUTHORS AUTHORS: add Michal Lenc 2025-12-03 08:46:33 -03:00
CMakeLists.txt cmake: Add support for ccache. 2025-12-05 11:46:30 +01:00
CONTRIBUTING.md style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
INVIOLABLES.md INVIOLABLES.md: Fix a simple alignment and change occurrences of Nuttx 2020-09-03 01:33:05 +08:00
Kconfig drivers/timers/ptp: support ptp clock driver model 2025-12-30 10:22:09 -03:00
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 Remove the double blank line from source files 2022-02-20 20:10:14 +01:00
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.