Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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wangjianyu3 76b90e02cb Revert "boards/esp32s3-xiao: switch defconfigs to nxinit entrypoint"
This reverts commit 7cc6707a76.

Felipe Moura de Oliveira reported on the dev mailing list that this
commit hangs boot on real Seeed XIAO ESP32-S3 Sense hardware (chip
rev v0.2): both defconfigs (combo, usbnsh) never reach nx_start after
a normal reset (no console output, no USB enumeration; only ROM
download mode via the BOOT strap pin responds). JTAG (OpenOCD + GDB)
shows the core statically stuck inside the chip boot ROM address
range (0x40034000-0x40048000), with nx_start never reached at its
own address (0x42011068) in that build. Reverting only this commits
defconfig changes on top of current master fixes the boot.

Local static analysis (before/after build product comparison via
esptool image_info and readelf -S) ruled out image size/segment
count as the cause: both binaries have 3 segments, identical IRAM
segment address/size byte-for-byte, and the flash-mapped code/data
growth from this change is ~14.7KB total against an 8MB flash
budget. No hardware matching the reported board was available
locally to reproduce or bisect further; reverting to unblock master
per the reporters request while root cause is investigated with
real hardware access.

Reference: https://www.mail-archive.com/dev@nuttx.apache.org/msg15063.html

Assisted-by: Kiro:claude-sonnet-5
Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
2026-09-02 15:17:47 +08:00
.github .github/workflows/build.yml: bump nuttx-ntfc-testing to release-0.0.2 2026-09-01 17:45:05 +08:00
arch arch/arm/stm32: set F412 SRAM1_END to 256KiB 2026-09-02 15:17:37 +08:00
audio audio: limit the buffer count guard to shared ring requests 2026-08-05 07:58:53 +02:00
binfmt sched: add supplementary group IDs (setgroups/getgroups/initgroups) 2026-08-12 16:06:03 -03:00
boards Revert "boards/esp32s3-xiao: switch defconfigs to nxinit entrypoint" 2026-09-02 15:17:47 +08:00
cmake cmake: parse EXTRAFLAGS with separate_arguments. 2026-09-01 09:19:27 +08:00
crypto tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
Documentation Documentation/lsm6ds3trc: document FIFO mode and its quirks 2026-09-02 09:05:20 +08:00
drivers Documentation/lsm6ds3trc: document FIFO mode and its quirks 2026-09-02 09:05:20 +08:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs: fix pre-existing nxstyle issues in touched files 2026-08-28 23:07:24 +08:00
graphics graphics/nxterm: consume SGR escape sequences 2026-08-23 10:46:02 +08:00
include include/nuttx/macro.h: Let FOREACH_ARG() paste the argument index 2026-09-01 17:55:52 -03:00
libs libs/libc/machine/arm: Fix the nxstyle errors in arch_elf.c. 2026-09-01 09:16:39 +08:00
mm cmake: Use NUTTX(_DIR/_BIN_DIR) instead CMAKE(_SRC_DIR/_BIN_DIR) 2026-08-09 11:13:08 -03:00
net net, arch: Fix nxstyle errors in files the CAN ioctl merge touches. 2026-09-01 17:40:47 +08:00
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/setparam: update sporadic parameters of the target task 2026-08-29 11:14:34 -03:00
syscall fs: rename PSEUDOFS_SOFTLINKS to FS_LINKS 2026-08-27 01:12:33 +08:00
tools tools/export: prefix each linker script in toolchain.cmake. 2026-09-01 17:41:42 +08:00
video video/videomode: Fix EDID parsing and formatting of video mode dumps 2026-08-29 11:09:11 -03:00
wireless wireless/bluetooth: fix inverted MTU cap in bt_conn_send() 2026-08-30 10:48:18 -03:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines arch/arm: Reserve r10 via ARCHCFLAGS and hoist the PIC module flags. 2026-07-24 23:09:08 +08:00
.codespellrc Revert "zbus: Add linker support and documentation for the zbus port" 2026-08-30 10:45:19 -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
.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 Jorge Guzman 2026-08-25 08:43:13 -04:00
CMakeLists.txt include/nuttx: Add link-time iterable sections infrastructure 2026-08-27 01:04:05 +08:00
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 Remove the double blank line from source files 2022-02-20 20:10:14 +01:00
README.md ci/testing: Add MemBrowse Integration 2026-06-18 12:07:41 -03:00
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.