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NuttX - RV32 blink_leds (QEMU) example
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‎nuttx-riscv-blink/CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.14...3.30)
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project(blink
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VERSION 1.0
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DESCRIPTION "Blink on NuttX"
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LANGUAGES Swift
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)
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if("${CMAKE_Swift_COMPILER_VERSION}" VERSION_LESS 6.0)
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message(FATAL_ERROR "Swift 6.0 or later is required")
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endif()
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if(POLICY CMP0169)
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# allow to call FetchContent_Populate directly
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cmake_policy(SET CMP0169 OLD)
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endif()
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option(LIST_ALL_BOARDS "List all available boards" OFF)
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option(ENABLE_NUTTX_TRACE "Enable NuttX trace" OFF)
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if(ENABLE_NUTTX_TRACE)
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set(TRACEFLAG "--trace")
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else()
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set(TRACEFLAG "")
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endif()
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set(FETCHCONTENT_QUIET FALSE)
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include(FetchContent)
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FetchContent_Declare(
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apps
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GIT_REPOSITORY https://github.com/apache/nuttx-apps.git
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GIT_TAG nuttx-12.7.0-RC0
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SOURCE_DIR ${CMAKE_BINARY_DIR}/apps
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FIND_PACKAGE_ARGS
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)
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FetchContent_GetProperties(apps)
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if(NOT apps_POPULATED)
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FetchContent_Populate(apps)
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endif()
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FetchContent_Declare(
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nuttx
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GIT_REPOSITORY https://github.com/apache/nuttx.git
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GIT_TAG nuttx-12.7.0-RC0
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SOURCE_DIR ${CMAKE_BINARY_DIR}/nuttx
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FIND_PACKAGE_ARGS
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)
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FetchContent_GetProperties(nuttx)
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if(NOT nuttx_POPULATED)
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FetchContent_Populate(nuttx)
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endif()
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if(NOT "${nuttx_SOURCE_DIR}" STREQUAL "")
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list(APPEND CMAKE_MODULE_PATH ${apps_SOURCE_DIR}/cmake)
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list(APPEND CMAKE_MODULE_PATH ${nuttx_SOURCE_DIR}/cmake)
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endif()
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if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
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set(SCRIPT_SUFFIX .bat)
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else()
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set(SCRIPT_SUFFIX .sh)
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endif()
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if(LIST_ALL_BOARDS)
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execute_process(
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COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
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${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
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${nuttx_SOURCE_DIR}/tools/configure${SCRIPT_SUFFIX} -L
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RESULT_VARIABLE result
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)
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if(result)
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message(FATAL_ERROR "Failed to run tools/configure")
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endif()
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else()
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if(NOT DEFINED BOARD_CONFIG)
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message(FATAL_ERROR "Please define configuration with BOARD_CONFIG")
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else()
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message(STATUS "BOARD_CONFIG: ${BOARD_CONFIG}")
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endif()
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# Send swift-blinky example to nuttx-apps path
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file(COPY ${CMAKE_SOURCE_DIR}/leds_swift DESTINATION ${apps_SOURCE_DIR}/examples)
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file(COPY ${CMAKE_SOURCE_DIR}/defconfig DESTINATION ${nuttx_SOURCE_DIR}/boards/risc-v/qemu-rv/rv-virt/configs/leds_swift)
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add_custom_target(distclean
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COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
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${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
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make distclean
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COMMENT "Clean NuttX"
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)
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execute_process(
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COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
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${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
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${nuttx_SOURCE_DIR}/tools/configure${SCRIPT_SUFFIX} -l ${BOARD_CONFIG}
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RESULT_VARIABLE result
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)
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if(result)
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message(FATAL_ERROR "Failed to run tools/configure")
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endif()
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add_custom_target(copy_swift_example
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COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_SOURCE_DIR}/leds_swift ${apps_SOURCE_DIR}/examples/leds_swift
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COMMENT "Copying leds_swift example to nuttx-apps"
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)
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add_custom_target(build_nuttx ALL
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COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
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${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
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make ${TRACEFLAG} -j ${JOB_POOLS}
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DEPENDS copy_swift_example
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COMMENT "Building NuttX"
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)
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add_custom_command(
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TARGET build_nuttx
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POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy ${nuttx_SOURCE_DIR}/nuttx ${CMAKE_BINARY_DIR}/nuttx.elf
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)
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add_custom_target(export_nuttx
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COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
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${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
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make export
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COMMENT "Exporting NuttX"
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)
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add_custom_target(extract_nuttx_export
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COMMAND ${CMAKE_COMMAND} -E tar xzf ${nuttx_SOURCE_DIR}/nuttx-export-12.7.0.tar.gz
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WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
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COMMAND ${CMAKE_COMMAND} -E remove ${nuttx_SOURCE_DIR}/nuttx-export-12.7.0.tar.gz
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DEPENDS export_nuttx
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COMMENT "Extracting NuttX export"
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)
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add_custom_target(nuttx-libs
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DEPENDS build_nuttx export_nuttx extract_nuttx_export
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)
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endif()

‎nuttx-riscv-blink/README.md‎

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# Swift 6 on NuttX RTOS using CMake
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## Description
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Run blink rv32-blink_leds (QEMU) example on NuttX RTOS.
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> [!NOTE]
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> CMake is adapted to build NuttX and NuttX-apps (Makefiles) with Swift 6.
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## Requirements
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- [NuttX](https://github.com/apache/nuttx) & [NuttX-apps](https://github.com/apache/nuttx-apps)
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- [kconfig-frontends](https://bitbucket.org/nuttx/tools)
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- [CMake](https://cmake.org/download/)
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- [QEMU](https://www.qemu.org/)
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- [Swift 6](https://swift.org/download/)
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- [RISC-V GNU Toolchain](https://github.com/riscv-collab/riscv-gnu-toolchain/releases)
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## How to build
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```bash
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# list all supported boards
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cmake -B build -DLIST_ALL_BOARDS=ON | less
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# build configuration
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cmake -B build -GNinja -DBOARD_CONFIG=rv-virt:leds_swift -DENABLE_NUTTX_TRACE=[ON|OFF]
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# build
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cmake --build build
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# clean
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cmake --build build -t distclean
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# export NuttX as library
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cmake --build build -t nuttx-libs
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```
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- **Output**
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```bash
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qemu-system-riscv32 \
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-semihosting \
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-M virt,aclint=on \
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-cpu rv32 -smp 8 \
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-bios none \
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-kernel build/nuttx.elf -nographic
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NuttShell (NSH) NuttX-12.7.0
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nsh> leds_swift
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leds_main: led_daemon started
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led_daemon (pid# 4): Running
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led_daemon: Opening /dev/userleds
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led_daemon: Supported LEDs 0x7
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led_daemon: LED set 0x1
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board_userled: LED 1 set to 1
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board_userled: LED 2 set to 0
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board_userled: LED 3 set to 0
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nsh> led_daemon: LED set 0x0
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board_userled: LED 1 set to 0
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board_userled: LED 2 set to 0
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board_userled: LED 3 set to 0
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led_daemon: LED set 0x1
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board_userled: LED 1 set to 1
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board_userled: LED 2 set to 0
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board_userled: LED 3 set to 0
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led_daemon: LED set 0x0
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# [...] see output in QEMU
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```
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Quit from QEMU: `Ctrl-a x`
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## References
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- [Nuttx - Compiling with CMake](https://nuttx.apache.org/docs/latest/quickstart/compiling_cmake.html)
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- [NuttX - C++ Example using CMake](https://nuttx.apache.org/docs/latest/guides/cpp_cmake.html)
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- [NuttX - leds_rust](https://lupyuen.github.io/articles/rust6)

‎nuttx-riscv-blink/defconfig‎

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#
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# This file is autogenerated: PLEASE DO NOT EDIT IT.
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#
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# You can use "make menuconfig" to make any modifications to the installed .config file.
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# You can then do "make savedefconfig" to generate a new defconfig file that includes your
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# modifications.
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#
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# CONFIG_DISABLE_OS_API is not set
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# CONFIG_NSH_DISABLE_LOSMART is not set
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CONFIG_16550_ADDRWIDTH=0
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CONFIG_16550_UART0=y
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CONFIG_16550_UART0_BASE=0x10000000
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CONFIG_16550_UART0_CLOCK=3686400
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CONFIG_16550_UART0_IRQ=37
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CONFIG_16550_UART0_SERIAL_CONSOLE=y
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CONFIG_16550_UART=y
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CONFIG_ARCH="risc-v"
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CONFIG_ARCH_BOARD="rv-virt"
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CONFIG_ARCH_BOARD_QEMU_RV_VIRT=y
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CONFIG_ARCH_CHIP="qemu-rv"
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# CONFIG_ARCH_CHIP_QEMU_RV64=y
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CONFIG_ARCH_CHIP_QEMU_RV=y
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CONFIG_ARCH_CHIP_QEMU_RV_ISA_A=y
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CONFIG_ARCH_CHIP_QEMU_RV_ISA_C=y
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CONFIG_ARCH_CHIP_QEMU_RV_ISA_M=y
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CONFIG_ARCH_INTERRUPTSTACK=2048
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CONFIG_ARCH_RISCV=y
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CONFIG_ARCH_STACKDUMP=y
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CONFIG_BCH=y
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CONFIG_BOARDCTL_POWEROFF=y
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CONFIG_BOARD_LATE_INITIALIZE=y
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CONFIG_BOARD_LOOPSPERMSEC=6366
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CONFIG_BUILTIN=y
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CONFIG_DEBUG_FEATURES=y
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CONFIG_DEBUG_FULLOPT=y
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CONFIG_DEBUG_SYMBOLS=y
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CONFIG_DEVICE_TREE=y
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CONFIG_DEV_ZERO=y
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CONFIG_ELF=y
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# CONFIG_EXAMPLES_HELLO=y
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CONFIG_EXAMPLES_LEDS=y
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CONFIG_EXAMPLES_LEDS_SWIFT=y
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CONFIG_FS_HOSTFS=y
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CONFIG_FS_PROCFS=y
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CONFIG_IDLETHREAD_STACKSIZE=2048
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CONFIG_INIT_ENTRYPOINT="nsh_main"
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CONFIG_INIT_STACKSIZE=3072
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CONFIG_LIBC_ENVPATH=y
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CONFIG_LIBC_EXECFUNCS=y
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CONFIG_LIBC_PERROR_STDOUT=y
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CONFIG_LIBC_STRERROR=y
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CONFIG_LIBM=y
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CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
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CONFIG_NSH_ARCHINIT=y
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CONFIG_NSH_BUILTIN_APPS=y
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CONFIG_NSH_FILEIOSIZE=512
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CONFIG_NSH_READLINE=y
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CONFIG_PATH_INITIAL="/system/bin"
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CONFIG_RAM_SIZE=33554432
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CONFIG_RAM_START=0x80000000
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CONFIG_READLINE_CMD_HISTORY=y
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CONFIG_RISCV_SEMIHOSTING_HOSTFS=y
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CONFIG_RR_INTERVAL=200
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CONFIG_SCHED_WAITPID=y
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CONFIG_SERIAL_UART_ARCH_MMIO=y
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CONFIG_STACK_COLORATION=y
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CONFIG_START_MONTH=12
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CONFIG_START_YEAR=2021
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CONFIG_SYMTAB_ORDEREDBYNAME=y
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CONFIG_SYSTEM_NSH=y
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CONFIG_SYSTEM_NSH_STACKSIZE=3072
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CONFIG_TESTING_GETPRIME=y
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CONFIG_TESTING_OSTEST=y
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CONFIG_USEC_PER_TICK=1000
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CONFIG_USERLED=y
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CONFIG_USERLED_LOWER=y

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