Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
Find a file
Huang Qi 2ecd2722cd boards/esp32s3: Increase LCD PWM frequency to reduce LCD flicker
Increase LCD PWM frequency from 100Hz to 10kHz to eliminate visible flicker
on the lckfb-szpi ESP32S3 board. The higher frequency provides smoother
backlight control and improves display visual quality.

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
2025-10-29 14:10:28 -04:00
.github build(deps): bump actions/download-artifact from 5 to 6 2025-10-27 19:47:03 +08:00
arch arch/xtensa: update SPI Flash driver for ESP32-S2|S3 2025-10-29 09:44:55 -04:00
audio fs/file: unify prefix about file_xxx api, like file_open, file_ioctl 2025-06-12 18:12:42 +08:00
binfmt libc/elf: rename modlib to libelf 2025-04-11 09:43:22 +08:00
boards boards/esp32s3: Increase LCD PWM frequency to reduce LCD flicker 2025-10-29 14:10:28 -04:00
cmake cmake: correct nuttx_wildcard_sources cmake usage 2025-10-16 12:48:40 +08:00
crypto crypto/hmac: Fix typo in function implementation names 2025-08-13 23:11:02 +08:00
Documentation docs/platforms/arm64/bcm2711: microSD documented, improvements 2025-10-28 16:21:53 -03:00
drivers drivers/usbhost_hub: Add support to Multiple TT HS HUB 2025-10-27 18:24:42 +08:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs/fat: Ignore //... sequences in the file path 2025-10-23 08:44:12 -04:00
graphics sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
include sched/sched: Introduce nxsched_wakeup() 2025-10-28 10:43:24 +08:00
libs libs: remove not related comments from cmake files 2025-10-11 17:07:51 -04:00
mm mm/: remove reference to non-existent readme 2025-10-11 17:07:51 -04:00
net net/can/can_recvmsg.c: Cleanup can_readahead 2025-08-26 20:42:01 +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/sched: Use nxsched_wakeup() to implement nxsched_timeout() 2025-10-28 10:43:24 +08:00
syscall sched/gettid: Move thread ID to TLS 2025-04-08 22:53:10 +08:00
tools cmake: Remove unused BUILD_OOTCPP guard from configuration. 2025-10-17 17:06:46 -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 feat: add a GitHub action to lint the YAML files 2020-12-15 09:52:04 -06:00
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 INVIOLABLES.md: Fix a simple alignment and change occurrences of Nuttx 2020-09-03 01:33:05 +08:00
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 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

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

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.