Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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Jorge Guzman 093937a988 boards/arm/stm32h7/linum-stm32h753bi: drive lvglterm from the serial console
The terminal reads a keyboard device and does not care which one, so it
can be driven with no keyboard plugged in at all.  Enable UINPUT_KEYBOARD
and system/kbd so that the configuration can do it out of the box, and
document how, including how to have the USB keyboard and the console feed
the terminal at the same time.

The terminal no longer has a USB specific input source either, so the
device path has to be spelled out:  the USB HID driver names its devices
/dev/kbda onwards while the option defaults to /dev/kbd0.

INPUT_KEYBOARD_BYTESTREAM is not needed here.  The terminal reads events
now, and this configuration has no other keyboard consumer.

UINPUT_KEYBOARD_BUFNUMBER is raised to 128.  It counts events rather than
keys, so the default of eight holds four keystrokes, and a console hands
over a whole line at once.  The upper half overwrites the oldest event
when the buffer is full, so a typed line arrived with its beginning
silently missing.

HIDKBD_NOGETREPORT is enabled as well.  Sampling the keyboard over the
control pipe every 40 ms loses any key pressed and released between two
samples, which on this board meant most of them.

Signed-off-by: Jorge Guzman <jorge.gzm@gmail.com>
2026-08-02 18:37:12 +08:00
.github ci: Support pull request dependencies via Depends-On. 2026-08-01 20:26:14 +08:00
arch arm64/am62x: Add TISCI client, GPIO and I2C drivers 2026-08-02 11:40:13 +08:00
audio tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
binfmt fs/binfmt: close symlink TOCTOU and harden setuid/setgid exec hygiene 2026-08-01 15:32:03 -03:00
boards boards/arm/stm32h7/linum-stm32h753bi: drive lvglterm from the serial console 2026-08-02 18:37:12 +08:00
cmake cmake: Omit default priority ELF symbol. 2026-07-27 14:30:42 +08:00
crypto tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
Documentation boards/arm/stm32h7/linum-stm32h753bi: drive lvglterm from the serial console 2026-08-02 18:37:12 +08:00
drivers WDOG: Output status on read 2026-08-02 00:38:05 +08:00
dummy
fs fs/binfmt: close symlink TOCTOU and harden setuid/setgid exec hygiene 2026-08-01 15:32:03 -03:00
graphics tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
include fs/binfmt: close symlink TOCTOU and harden setuid/setgid exec hygiene 2026-08-01 15:32:03 -03:00
libs fs/binfmt: close symlink TOCTOU and harden setuid/setgid exec hygiene 2026-08-01 15:32:03 -03:00
mm mm/ubsan: fix signed inline value decoding 2026-07-30 12:52:17 +02:00
net net/ipfilter: Reassemble IPv6 fragments before filtering 2026-08-01 17:40:07 -03:00
openamp tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
pass1 tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
sched fs/binfmt: close symlink TOCTOU and harden setuid/setgid exec hygiene 2026-08-01 15:32:03 -03:00
syscall sched/group: add getresuid, getresgid, setreuid, and setregid 2026-07-30 09:48:10 +08:00
tools arch/arm/rtl8721f: bring up minimal NSH (P1) 2026-07-30 17:04:14 +08:00
video tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -03:00
wireless tools: fix stale archive members surviving a Kconfig-driven CSRCS change 2026-07-28 21:26:03 -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 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
.yamllint
AUTHORS AUTHORS: add Eren Terzioglu 2026-05-20 15:17:00 +08:00
CMakeLists.txt cmake: Do not link an executable to detect the compiler. 2026-07-25 22:52:39 +08:00
CONTRIBUTING.md contributing: Add requirement for 'Assisted-by' commit field 2026-07-12 09:42:28 +08:00
INVIOLABLES.md
Kconfig sched/misc/assert: Add CONFIG_SCHED_DUMP_TASKS and CONFIG_SCHED_DUMP_STACK 2026-06-09 08:04:54 -04:00
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.