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This patch introduces the foundational PTP (Precision Time Protocol) clock driver framework for NuttX, enabling precise time synchronization support based on IEEE 1588 standard. Key changes include: 1. New PTP clock driver infrastructure: - Added drivers/timers/ptp_clock.c implementing upper-half driver - Created include/nuttx/timers/ptp_clock.h with PTP clock interfaces - Implemented upper/lower half driver architecture for hardware abstraction 2. Core functionality: - Clock time get/set operations (gettime, settime) - Frequency adjustment support (adjtime, adjfine) - Phase adjustment capabilities - System-device cross-timestamping for precise synchronization 3. IOCTL commands: - PTP_CLOCK_SETTIME/GETTIME for time manipulation - PTP_CLOCK_GETRES for resolution queries - PTP_CLOCK_ADJTIME for time adjustment - PTP_CLOCK_GETCAPS for capability queries - PTP_SYS_OFFSET* for system offset measurements 4. Supporting structures: - struct ptp_lowerhalf_s: lower-half driver interface - struct ptp_clock_caps: clock capabilities descriptor - struct ptp_sys_offset: system time offset measurement - Added timex structures in include/sys/timex.h for ADJ_* operations 5. Build system integration: - Added CONFIG_PTP_CLOCK Kconfig option - Updated CMakeLists.txt and Make.defs - Added PTPCLK debug macros in include/debug.h This framework provides the base for PTP clock implementations, allowing hardware-specific drivers to register and provide precise time services through a standardized interface. Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com> |
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| .github | ||
| arch | ||
| audio | ||
| binfmt | ||
| boards | ||
| cmake | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| dummy | ||
| fs | ||
| graphics | ||
| include | ||
| libs | ||
| mm | ||
| net | ||
| openamp | ||
| pass1 | ||
| sched | ||
| syscall | ||
| tools | ||
| video | ||
| wireless | ||
| .asf.yaml | ||
| .codespell-ignore-lines | ||
| .codespellrc | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmessage | ||
| .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.