Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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alexcekay 82fb723bde fs/littlefs: add block_size_factor mount option
When a board switches storage technology but wants to mount a littlefs
filesystem onto this storage it is desired to still use the same firmware.

This almost works out of the box in NuttX with the exception of setting the
correct block size, which may be different depending on the used storage.
An incorrect block size may lead to suboptimal performance or worse.

To avoid writing a firmware variant that only differs by
CONFIG_FS_LITTLEFS_BLOCK_SIZE_FACTOR this adds the option to pass the
intended block size at the mount call. To still enable the usage of the existing
options this adds a parser for comma-separated mount options, allowing multiple
options to be passed simultaneously.

Example: "autoformat,block_size_factor=4",
         "autoformat,block_size_factor=1"

This is backwards compatible: single options passed without commas continue to
work as before.

Signed-off-by: alexcekay <alexander@auterion.com>
2026-06-16 01:45:31 +08:00
.github workflows/build.yml: Fix Skipping sim\windows in the MSVC job 2026-06-03 07:25:25 +08:00
arch arch/arm/src/common/stm32/Kconfig.i2c: add missing new line 2026-06-15 14:44:57 +02:00
audio include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
binfmt fs/binfmt: Enforce POSIX execute permissions prior to binary load 2026-06-13 21:07:01 +08:00
boards arch/risc-v/rp23xx-rv: Add SMP support for dual Hazard3 2026-06-14 22:54:12 +08:00
cmake build/fix: remove nonexistent target in cmake 2026-06-08 16:03:21 +08:00
crypto !nuttx: drop redundant casts on tv_sec/tv_nsec and fix printf formats 2026-05-19 16:21:28 +08:00
Documentation Documentation: update references to nrfjprog 2026-06-15 23:02:28 +08:00
drivers drivers/can/ctucanfd_pci: Stack Overflow When Malformed CAN Data Is Received 2026-06-15 12:34:54 +02:00
dummy
fs fs/littlefs: add block_size_factor mount option 2026-06-16 01:45:31 +08:00
graphics include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
include arch/nrf91: expose GNSS priority as a control ioctl 2026-06-14 08:46:46 -03:00
libs libs/libc/pthread/pthread_mutex: Fix robust mutex initialization 2026-06-12 08:04:09 +08:00
mm mm/kasan: Fix compile options applied to wrong target in SPLIT build 2026-06-08 16:03:21 +08:00
net !sys/types.h: change time_t and clock_t to int64_t to align with other OSes 2026-05-19 16:21:28 +08:00
openamp openamp: fix CMake dcache option 2026-05-10 15:03:24 +02:00
pass1 Makefile: Remove make depend files by make distclean 2026-02-16 16:27:57 +01:00
sched sched/clock/clock_delay: added config flag to remove weak up_udelay 2026-06-12 09:55:11 -04:00
syscall syscall: fcntl param3 type to uintptr_t 2026-04-27 12:01:55 -03:00
tools tools: Enable Rust sim builds on Intel Macs 2026-06-08 21:22:45 +08:00
video video: ensure video library is non-empty 2026-05-08 19:51:39 +08:00
wireless include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines !boards: Remove NSH_ARCHINIT and board_app_initialize 2026-05-02 18:36:46 +08:00
.codespellrc arch/sim: replace macOS C++ constructor runtime hack with post-link patch 2026-05-19 07:08:55 -03:00
.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 cmake/nuttx_toolchain.cmake: track preprocessed include deps 2026-06-04 17:22:43 +08:00
CONTRIBUTING.md docs: Fix typos, formatting, and numbering in README.md and CONTRIBUTING.md. 2026-03-23 12:05:24 +01:00
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 !boards: Remove NSH_ARCHINIT and board_app_initialize 2026-05-02 18:36:46 +08:00
Makefile tools: migrate to SPDX identifier 2024-09-10 23:11:11 +08:00
NOTICE
README.md docs: Fix typos, formatting, and numbering in README.md and CONTRIBUTING.md. 2026-03-23 12:05:24 +01:00
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.