dedb4c95c9
1. correct the armv8-r fpu flag from vfpv3-d16 to fpv5-sp-d16 2. add neon support This commit updates the build script to specify the FPU type of `fpv5-sp-d16` when the processor is configured with a single-precision FPU, and `neon-fp-armv8` when the processor is configured with a double-precision + Advanced SIMD-capable FPU. Note that the `fp-armv8` FPU type is an alias for double-precision FPv5 with 32 double-precision registers (refer to the GCC `gcc/config/arm/arm-cpus.in` for more details); NEON is always specified in case of a double-precision configuration because the Cortex-R52 can only be configured as such. Reference: https://developer.arm.com/Processors/Cortex-R52 Instruction set: Arm and Thumb-2. Supports DSP instructions and a configurable Floating-Point Unit either with single-precision or double precision and Neon. Signed-off-by: chao an <anchao@lixiang.com>
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.