Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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leocafonso 6a9f10327f boards/arm/ra8m1/ek-ra8m1: Add SCI0 pins and a serial-test config
board.h gains GPIO_SCI0_RX/TX (P610/P609, SCI0 pin group 3), needed to
exercise CONFIG_RA_SCI0_UART on this board at all -- previously only
SCI9's console pins existed.

The new serial-test defconfig builds on nsh with SCI0 enabled as
/dev/ttyS1 with its FIFO (CONFIG_RA_SCI0_FIFO, measured on hardware as
the best overrun-resistant setting: TTRG=15, RXTRG=0), 1024-byte RX/TX
ring buffers (up from the 256-byte default, to better absorb bursts
during testing), CONFIG_SERIAL_TERMIOS + apps/system/stty (to change
its baud rate live), and apps/examples/serialblaster + serialrx
pointed at it, for exercising the SCI_B driver's FIFO/overrun-recovery
paths independently of the SCI9 console.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Assisted-by: Claude:claude-sonnet-5
Signed-off-by: leocafonso <leocafonso@gmail.com>
2026-10-06 16:56:58 -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/ra8m1: Add DTC and per-instance SCI FIFO/DTC/termios support 2026-10-06 16:56:58 -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/arm/ra8m1/ek-ra8m1: Add SCI0 pins and a serial-test config 2026-10-06 16:56:58 -03:00
cmake cmake/nuttx_add_romfs.cmake: Improved process_all_directory_romfs function 2026-10-05 18:42:56 +08:00
crypto crypto: fix chacha constants under GCC 15. 2026-09-20 08:22:11 -03:00
Documentation boards/arm/stm32h5: add initial STM32H573I-DK support 2026-10-06 16:36:40 -03:00
drivers sensors/adxl367: add I2C accelerometer support 2026-10-06 14:47:12 -03:00
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 sensors/adxl367: add I2C accelerometer support 2026-10-06 14:47:12 -03:00
libs libc/termios: Fix the ttyname_r buffer overflow with long tty paths. 2026-10-05 18:42:52 +08:00
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: Skip wd_cancel() on wakeup when the waiter set no timeout. 2026-10-05 20:17:02 +08:00
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 github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines arch/arm/ra8m1: Add GPT timer support 2026-10-01 23:12:10 +08:00
.codespellrc zbus: Add linker support and documentation for the zbus port 2026-09-21 08:40:14 -03:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +08:00
.gitignore boards/risc-v/eic7700x: Adopt the common board layout. 2026-08-19 01:40:57 +08:00
.gitmessage docs/contributing: Add a commit message template 2025-06-03 17:33:24 +08:00
.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 arm/nrf54l: add Bluetooth SoftDevice Controller support 2026-10-02 15:37:12 -03:00
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.