dechao_gong
214d02f417
Wire the shared Ameba SPI (DesignWare SSI) driver (arch/arm/src/common/ameba/ameba_spi.c) into the RTL8720F build and expose the SPI0/SPI1 masters at /dev/spiN. Add the per-chip ameba_spi_chip.h with the RTL8720F controller bases (0x401C1000 / 0x401C2000, non-secure aliases), the group-0 SPI clock masks, the per-signal crossbar pad-mux codes (RTL8720F has no generic PINMUX_FUNCTION_SPI), and the SYS_PLL-based ip_clk computation (REG_LSYS_CKD_SYS_PLL_GRP0 HPERI divider). The chip header declares the SYS_PLL_ClkGet() query its AMEBA_SPI_IPCLK() uses, since RTL8720F has no PLL_ClkGet(). Compile the common driver and the SDK fwlib SSI RAM source under CONFIG_AMEBA_SPI, register the bus in the board bring-up, and add an "spi" board configuration exercising the system/spi spitool. Assisted-by: Claude <noreply@anthropic.com> Signed-off-by: dechao_gong <dechao_gong@realsil.com.cn>
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.