Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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dongjiuzhu1 c1b2b1b4fb poll: fix covertify issue about out-of-bound access fds
when i is zero and file_get is failed, num is -1,
it's uint32_max for nfds.
so remove num and simplify code logic.

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
2025-12-15 10:16:05 +08:00
.github workflows/doc.yml: bump python from 3.8 to 3.10 2025-12-10 19:23:50 +08:00
arch netdev_upperhalf: convert Kconfig to variable 2025-12-14 10:01:22 +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 binfmt: Fix error handling in exec_module 2025-12-11 12:57:07 -05:00
boards netdev_upperhalf: convert Kconfig to variable 2025-12-14 10:01:22 +08:00
cmake cmake: Improve nuttx_generate_kconfig() 2025-12-02 02:45:36 +08:00
crypto crypto/hmac: Fix typo in function implementation names 2025-08-13 23:11:02 +08:00
Documentation usbhost: cdcacm exit wq after copy all received data 2025-12-14 10:37:53 -03:00
drivers drivers/can/can.c: fix broken O_NONBLOCK 2025-12-14 15:42:35 -05:00
dummy
fs poll: fix covertify issue about out-of-bound access fds 2025-12-15 10:16:05 +08:00
graphics sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
include netdev_upperhalf: convert Kconfig to variable 2025-12-14 10:01:22 +08:00
libs libc: improve libc dependencies in case of LIBM_NONE 2025-12-14 17:57:27 -03:00
mm mm/: remove reference to non-existent readme 2025-10-11 17:07:51 -04:00
net net/udp: fix build error when NET_UDP_WRITE_BUFFERS disable 2025-12-10 23:44:14 +08:00
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 sched/misc: correct coredump log format 2025-12-12 14:54:05 +01:00
syscall sched/gettid: Move thread ID to TLS 2025-04-08 22:53:10 +08:00
tools espressif: automate build system for flash enc 2025-12-11 11:29:26 +01:00
video Revert "build depend:Revert Make.dep intermediate ddc file" 2024-09-15 19:29:47 +08:00
wireless wireless/ieee802154/: remove the use of critical_section 2025-12-09 14:43:59 +08:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines usbhost: cdcacm exit wq after copy all received data 2025-12-14 10:37:53 -03:00
.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
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
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.