8e6b925200
Implement the MTD write callback when CONFIG_MTD_BYTE_WRITE is enabled, allowing unaligned byte writes without changing existing block operations. Reject ranges outside the physical device and return zero for valid empty writes without SPI traffic. Use the initialized SPI device ID, hold the bus lock across the request, and issue write-enable for each transfer. With CONFIG_RAMTRON_CHUNKING, split writes at the write-buffer boundaries of chunk-limited parts. Document the optional callback and its bounds and chunk behavior. Verified with mocked-SPI host tests, driver compilation with byte writes and chunking enabled/disabled, and a Conductor STM32H743BI hardware test covering single-byte and unaligned writes, surrounding-byte preservation, invalid ranges, and restoration of the original FRAM contents. Hardware coverage is limited to the installed 32 KiB part. Assisted-by: Codex:GPT-6 Signed-off-by: jsanchez-2g <jsanchez@2g-eng.com> |
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| audio | ||
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| cmake | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| dummy | ||
| fs | ||
| graphics | ||
| include | ||
| libs | ||
| mm | ||
| net | ||
| openamp | ||
| pass1 | ||
| sched | ||
| syscall | ||
| tools | ||
| video | ||
| wireless | ||
| .asf.yaml | ||
| .codespell-ignore-lines | ||
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| .editorconfig | ||
| .gitignore | ||
| .gitmessage | ||
| .mcp.json | ||
| .pre-commit-config.yaml | ||
| .yamllint | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| INVIOLABLES.md | ||
| Kconfig | ||
| LICENSE | ||
| Makefile | ||
| NOTICE | ||
| README.md | ||
| ReleaseNotes | ||
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.