Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
Find a file
Marco Casaroli e8a3d4ee1c
Some checks are pending
Build Documentation / build-html (push) Waiting to run
MemBrowse Memory Report / changes-filter (push) Waiting to run
MemBrowse Memory Report / load-targets (push) Waiting to run
MemBrowse Memory Report / identical (push) Blocked by required conditions
MemBrowse Memory Report / analyze (push) Blocked by required conditions
Documentation/esp32s3: Describe memory protection and the kernel build.
The chip page did not say which build modes the ESP32-S3 supports, how a
KERNEL build uses the MMU, or what happens when user code takes a fault.
Add a section for that, with the console messages of a fault and the
options CONFIG_ESP32S3_USERFAULT_ABORT and CONFIG_ESP32S3_PAGEFAULT.

On the board page, kernel_oct said the shell needs the full path of a
program, but /system/bin is in PATH.  Say that instead, describe the
isolation of a process, and show how ostest and sandbox check it.  Also
add a section for ksta_softap, which had none.

Assisted-by: Claude Code:claude-opus-5-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
2026-09-30 13:40:16 -03:00
.github build(deps): bump docker/setup-buildx-action from 4.3.0 to 4.4.1 2026-09-21 16:28:50 +08:00
arch arch/arm: Call FDPIC constructors with the module's own data base. 2026-09-30 13:40:02 -03:00
audio audio: limit the buffer count guard to shared ring requests 2026-08-05 07:58:53 +02:00
binfmt libs/libc: Define the NXFLAT ABI marker in libc. 2026-09-28 16:45:48 -03:00
boards boards/risc-v/esp32c2/esp8684-devkitm: add ROMFS and extra configs 2026-09-30 11:49:41 -03:00
cmake cmake: fix undefined function name in parse args error messages 2026-09-11 21:15:22 +08:00
crypto crypto: fix chacha constants under GCC 15. 2026-09-20 08:22:11 -03:00
Documentation Documentation/esp32s3: Describe memory protection and the kernel build. 2026-09-30 13:40:16 -03:00
drivers drivers/usbhost: Correct the style of usbhost_hub.c. 2026-09-28 21:45:57 +08:00
dummy
fs sched/semaphore: Fix pre-existing nxstyle issues in the touched files 2026-09-25 10:37:43 +02:00
graphics graphics/nxterm: consume SGR escape sequences 2026-08-23 10:46:02 +08:00
include net/netdev: add NETDEV_TX_STAMP and handle SIOCETHTOOL ETHTOOL_GET_TS_INFO 2026-09-28 12:53:24 -03:00
libs libs/libc/elf: Read the dynamic relocations at their file offset. 2026-09-30 13:40:02 -03:00
mm mm/iob: fix CONFIG_NET_TIMESTAMPING typo in iob_alloc 2026-09-19 16:36:47 -03:00
net net/netdev: add NETDEV_TX_STAMP and handle SIOCETHTOOL ETHTOOL_GET_TS_INFO 2026-09-28 12:53:24 -03:00
openamp cmake: Use NUTTX(_DIR/_BIN_DIR) instead CMAKE(_SRC_DIR/_BIN_DIR) 2026-08-09 11:13:08 -03:00
pass1 tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
sched sched/profil: Fix declaration spacing. 2026-09-28 06:44:34 -03:00
syscall fs: add chroot() syscall 2026-09-20 22:27:38 +08:00
tools tools/nxflat: Leave ARM unwind tables out of an NXFLAT module. 2026-09-28 16:45:09 -03:00
video video/videomode: Fix EDID parsing and formatting of video mode dumps 2026-08-29 11:09:11 -03:00
wireless wireless/bluetooth: Validate Number Of Completed Packets event. 2026-09-25 10:35:51 +02:00
.asf.yaml
.codespell-ignore-lines arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
.codespellrc zbus: Add linker support and documentation for the zbus port 2026-09-21 08:40:14 -03:00
.editorconfig
.gitignore boards/risc-v/eic7700x: Adopt the common board layout. 2026-08-19 01:40:57 +08:00
.gitmessage
.mcp.json arch/risc-v/eic7700x: Describe and configure the pads. 2026-09-28 16:19:01 +08:00
.pre-commit-config.yaml
.yamllint
AUTHORS AUTHORS: add Jorge Guzman 2026-08-25 08:43:13 -04:00
CMakeLists.txt cmake: reconfigure when .config changes 2026-09-14 18:40:45 -03:00
CONTRIBUTING.md contributing: Add requirement for 'Assisted-by' commit field 2026-07-12 09:42:28 +08:00
INVIOLABLES.md
Kconfig include/nuttx: Add link-time iterable sections infrastructure 2026-08-27 01:04:05 +08:00
LICENSE libs/libdsp: Add Matrix operations 2026-07-11 14:55:59 -03:00
Makefile !boards: enforce secure ROMFS passwd and TEA key setup 2026-07-09 22:41:11 +08:00
NOTICE
README.md ci/testing: Add MemBrowse Integration 2026-06-18 12:07:41 -03:00
ReleaseNotes

POSIX Badge License Issues Tracking Badge Contributors GitHub Build Badge Documentation Badge MemBrowse

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.