Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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Justin Hammond 955ba67b7c drivers/pinctrl: Add debug output levels.
The pinctrl framework has no debug output of its own, so a provider
reporting a pad it could not configure has to reach for the bare _err()
and _info() macros.  Those are gated only by DEBUG_ERROR and DEBUG_INFO,
so the output cannot be turned off without silencing every subsystem that
has not been given its own level.

Add CONFIG_DEBUG_PINCTRL with the usual three levels and the matching
pinctrlerr(), pinctrlwarn() and pinctrlinfo() macros, in the same shape as
the reset ones above them.

Nothing selects these, so the build is unchanged until a provider starts
using them.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Justin Hammond <justin@dynam.ac>
2026-08-16 23:23:04 +08:00
.github drivers/lcd: rename apa102.c/max7219.c to unique object names 2026-08-13 09:54:26 -03:00
arch arch/arm/src/common/stm32: read UID with 32-bit accesses 2026-08-16 08:42:20 -03:00
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 arch/arm/rtl8721f: add SPI master driver support 2026-08-14 11:36:37 -03:00
cmake Revert "cmake: normalize .config on reconfigure" 2026-08-13 07:54:00 +02:00
crypto tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
Documentation arch/arm/rtl8721f: add SPI master driver support 2026-08-14 11:36:37 -03:00
drivers drivers/lcd: honour the LCD_APA102_* settings in the apa102 LCD driver 2026-08-13 09:54:26 -03:00
dummy build: add initial cmake build system 2023-07-08 13:50:48 +08:00
fs fs: resolve a trailing lone '.' path component 2026-08-14 10:20:52 +08:00
graphics tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
include drivers/pinctrl: Add debug output levels. 2026-08-16 23:23:04 +08:00
libs libc: add wait4() 2026-08-14 10:20:52 +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/udp: fix d_len corruption for 2nd+ SO_REUSEADDR listener 2026-08-12 09:41:52 -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: add setresuid and setresgid 2026-08-12 16:06:03 -03:00
syscall sched: add supplementary group IDs (setgroups/getgroups/initgroups) 2026-08-12 16:06:03 -03:00
tools arch/arm/rtl8721dx: add shared Ameba SPI driver 2026-08-14 11:36:37 -03:00
video tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
wireless wireless/bluetooth/bt_hcicore.c: Balance conn and buffer refs in hci_acl(). 2026-08-15 11:51:19 +08:00
.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 arch/arm/rp23xx: Add hardware TRNG driver for /dev/random. 2026-07-25 15:06:56 +08:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +08:00
.gitignore git: Specify multiple build directories in .gitignore. 2026-05-20 03:06:58 +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
AUTHORS AUTHORS: add Eren Terzioglu 2026-05-20 15:17:00 +08:00
CMakeLists.txt Revert "cmake: normalize .config on reconfigure" 2026-08-13 07:54:00 +02:00
CONTRIBUTING.md contributing: Add requirement for 'Assisted-by' commit field 2026-07-12 09:42:28 +08:00
INVIOLABLES.md
Kconfig drivers/pinctrl: Add debug output levels. 2026-08-16 23:23:04 +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 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.