diff --git a/.github/workflows/build-nuttx.yml b/.github/workflows/build-nuttx.yml
new file mode 100644
index 00000000..952fc7ec
--- /dev/null
+++ b/.github/workflows/build-nuttx.yml
@@ -0,0 +1,67 @@
+name: Build NuttX Examples
+
+on:
+ push:
+ branches: ["main"]
+ pull_request:
+ branches: ["main"]
+ schedule:
+ # Build on Mondays at 9am PST every week
+ - cron: '0 17 * * 1'
+
+jobs:
+ build-nuttx:
+ runs-on: ubuntu-24.04
+
+ strategy:
+ fail-fast: false
+ matrix:
+ example: [nuttx-riscv-blink]
+ swift: [swift-DEVELOPMENT-SNAPSHOT-2024-12-22-a]
+
+ steps:
+ - name: Checkout repo
+ uses: actions/checkout@v4
+
+ - name: Install apt dependencies
+ run: |
+ sudo apt-get -qq update && sudo apt-get -qq -y install \
+ bison flex gettext texinfo libncurses5-dev libncursesw5-dev \
+ gperf automake libtool pkg-config build-essential gperf genromfs \
+ libgmp-dev libmpc-dev libmpfr-dev libisl-dev binutils-dev libelf-dev \
+ libexpat-dev gcc-multilib g++-multilib u-boot-tools util-linux \
+ kconfig-frontends ninja-build
+
+ - name: Install CMake 3.30.2
+ run: |
+ ARCH=`uname -m`
+ curl -sL https://github.com/Kitware/CMake/releases/download/v3.30.2/cmake-3.30.2-linux-$ARCH.tar.gz -O
+ tar xzf cmake-3.30.2-linux-$ARCH.tar.gz
+ export PATH="`pwd`/cmake-3.30.2-linux-$ARCH/bin:$PATH"
+ echo "PATH=$PATH" >> $GITHUB_ENV
+ cmake --version
+
+ - name: Install RISC-V toolchain
+ run: |
+ mkdir -p riscv-none-elf-gcc && \
+ curl -s -L "https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack/releases/download/v13.2.0-2/xpack-riscv-none-elf-gcc-13.2.0-2-linux-x64.tar.gz" \
+ | tar -C riscv-none-elf-gcc --strip-components 1 -xz
+ export PATH="$PATH:`pwd`/riscv-none-elf-gcc/bin/"
+ echo "PATH=$PATH" >> $GITHUB_ENV
+ riscv-none-elf-gcc --version
+
+ - name: Install ${{ matrix.swift }}
+ run: |
+ wget -q https://download.swift.org/development/ubuntu2404/${{ matrix.swift }}/${{ matrix.swift }}-ubuntu24.04.tar.gz
+ tar xzf ${{ matrix.swift }}-ubuntu24.04.tar.gz
+ export PATH="`pwd`/${{ matrix.swift }}-ubuntu24.04/usr/bin/:$PATH"
+ echo "PATH=$PATH" >> $GITHUB_ENV
+ swiftc --version
+
+ - name: Config ${{ matrix.example }}
+ working-directory: ${{ matrix.example }}
+ run: cmake -B build -GNinja -DBOARD_CONFIG=rv-virt:leds_swift -DENABLE_NUTTX_TRACE=ON
+
+ - name: Build ${{ matrix.example }}
+ working-directory: ${{ matrix.example }}
+ run: cmake --build build
diff --git a/README.md b/README.md
index bbf6289b..ff7051a8 100644
--- a/README.md
+++ b/README.md
@@ -32,19 +32,20 @@ Each example in this repository contains build and deployment instructions, howe
| Name | Platform | SDK | Description | Photo |
| ---- | -------- | --- | ----------- | ----- |
+| [esp32-led-blink-sdk](./esp32-led-blink-sdk) | ESP32-C6-Bug | ESP-IDF SDK | Blink an LED repeatedly with Swift & the ESP-IDF. | 
|
+| [esp32-led-strip-sdk](./esp32-led-strip-sdk) | ESP32-C6-DevKitC-1 | ESP-IDF SDK | Control NeoPixel LEDs with Swift & the ESP-IDF. | 
|
+| [nrfx-blink-sdk](./nrfx-blink-sdk) | nRF52840-DK | Zephyr SDK | Blink an LED repeatedly with Swift & Zephyr. | 
|
+| [nuttx-riscv-blink] | QEMU | NuttX | Blink a virualized led in QEMU using the Apache NuttX RTOS | |
+| [pico-blink-sdk](./pico-blink-sdk) | Raspberry Pi Pico, Pico 2 | Pico SDK | Blink an LED repeatedly with Swift & the Pico SDK. | 
|
+| [pico-blink](./pico-blink) | Raspberry Pi Pico | None | Blink an LED repeatedly. | |
+| [pico-w-blink-sdk](./pico-w-blink-sdk) | Raspberry Pi Pico W | Pico SDK | Blink an LED to signal 'SOS' in Morse code repeatedly with Swift & the Pico SDK. | 
|
+| [pico2-neopixel](./pico2-neopixel) | Raspberry Pi Pico 2 | None | Control Neopixel LEDs using the RP2350 PIO. | 
|
| [stm32-blink](./stm32-blink) | STM32F746G-DISCO | None | Blink an LED repeatedly. | 
|
| [stm32-lcd-logo](./stm32-lcd-logo) | STM32F746G-DISCO | None | Animate the Swift Logo on the built-in LCD. | 
|
| [stm32-neopixel](./stm32-neopixel) | STM32F746G-DISCO | None | Control NeoPixel LEDs using SPI. | 
|
| [stm32-uart-echo](./stm32-uart-echo) | STM32F746G-DISCO | None | Echo user input using UART. | 
|
-| [pico-blink](./pico-blink) | Raspberry Pi Pico | None | Blink an LED repeatedly. | |
-| [pico-blink-sdk](./pico-blink-sdk) | Raspberry Pi Pico, Pico 2 | Pico SDK | Blink an LED repeatedly with Swift & the Pico SDK. | |
-| [pico-w-blink-sdk](./pico-w-blink-sdk) | Raspberry Pi Pico W | Pico SDK | Blink an LED to signal 'SOS' in Morse code repeatedly with Swift & the Pico SDK. | |
-| [pico2-neopixel](./pico2-neopixel) | Raspberry Pi Pico 2 | None | Control Neopixel LEDs using the RP2350 PIO. | |
-| [nrfx-blink-sdk](./nrfx-blink-sdk) | nRF52840-DK | Zephyr SDK | Blink an LED repeatedly with Swift & Zephyr. | |
-| [esp32-led-strip-sdk](./esp32-led-strip-sdk) | ESP32-C6-DevKitC-1 | ESP-IDF SDK | Control NeoPixel LEDs with Swift & the ESP-IDF. | |
-| [esp32-led-blink-sdk](./esp32-led-blink-sdk) | ESP32-C6-Bug | ESP-IDF SDK | Blink an LED repeatedly with Swift & the ESP-IDF. | |
-Note that the SDK integration examples (Pico SDK, Zephyr SDK, etc.) are not recommendations or endorsement, the same is true for build system choice (Make, CMake, SwiftPM, shell scripts). Embedded Swift aims to be versatile and to allow for integration into more existing SDKs and build systems, and the example projects are merely showing the possibilities.
+Note that the SDK integration examples (Pico SDK, Zephyr SDK, etc.) are not recommendations or endorsement, the same is true for build system choice (Make, CMake, SwiftPM, shell scripts). Embedded Swift aims to be versatile and allowing integration into existing SDKs and build systems, and the example projects show some of the possibilities.
## Community Examples
diff --git a/nuttx-riscv-blink/CMakeLists.txt b/nuttx-riscv-blink/CMakeLists.txt
new file mode 100644
index 00000000..da191f00
--- /dev/null
+++ b/nuttx-riscv-blink/CMakeLists.txt
@@ -0,0 +1,134 @@
+cmake_minimum_required(VERSION 3.14...3.30)
+
+project(blink
+ VERSION 1.0
+ DESCRIPTION "Blink on NuttX"
+ LANGUAGES Swift
+)
+
+if("${CMAKE_Swift_COMPILER_VERSION}" VERSION_LESS 6.1)
+ message(FATAL_ERROR "Swift 6.1 or later is required")
+endif()
+
+if(POLICY CMP0169)
+ # allow to call FetchContent_Populate directly
+ cmake_policy(SET CMP0169 OLD)
+endif()
+
+option(LIST_ALL_BOARDS "List all available boards" OFF)
+option(ENABLE_NUTTX_TRACE "Enable NuttX trace" OFF)
+
+if(ENABLE_NUTTX_TRACE)
+ set(TRACEFLAG "--trace")
+else()
+ set(TRACEFLAG "")
+endif()
+
+set(FETCHCONTENT_QUIET FALSE)
+include(FetchContent)
+FetchContent_Declare(
+ apps
+ GIT_REPOSITORY https://github.com/apache/nuttx-apps.git
+ GIT_TAG nuttx-12.7.0
+ SOURCE_DIR ${CMAKE_BINARY_DIR}/apps
+ FIND_PACKAGE_ARGS
+)
+FetchContent_GetProperties(apps)
+if(NOT apps_POPULATED)
+ FetchContent_Populate(apps)
+endif()
+
+FetchContent_Declare(
+ nuttx
+ GIT_REPOSITORY https://github.com/apache/nuttx.git
+ GIT_TAG nuttx-12.7.0
+ SOURCE_DIR ${CMAKE_BINARY_DIR}/nuttx
+ FIND_PACKAGE_ARGS
+)
+FetchContent_GetProperties(nuttx)
+if(NOT nuttx_POPULATED)
+ FetchContent_Populate(nuttx)
+endif()
+
+if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
+ set(SCRIPT_SUFFIX .bat)
+else()
+ set(SCRIPT_SUFFIX .sh)
+endif()
+
+if(LIST_ALL_BOARDS)
+ execute_process(
+ COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
+ ${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
+ ${nuttx_SOURCE_DIR}/tools/configure${SCRIPT_SUFFIX} -L
+ RESULT_VARIABLE result
+ )
+ if(result)
+ message(FATAL_ERROR "Failed to run tools/configure")
+ endif()
+else()
+ if(NOT DEFINED BOARD_CONFIG)
+ message(FATAL_ERROR "Please define configuration with BOARD_CONFIG")
+ else()
+ message(STATUS "BOARD_CONFIG: ${BOARD_CONFIG}")
+ endif()
+
+ # Send swift-blinky example to nuttx-apps path
+ file(COPY ${CMAKE_SOURCE_DIR}/leds_swift DESTINATION ${apps_SOURCE_DIR}/examples)
+ file(COPY ${CMAKE_SOURCE_DIR}/defconfig DESTINATION ${nuttx_SOURCE_DIR}/boards/risc-v/qemu-rv/rv-virt/configs/leds_swift)
+
+ add_custom_target(distclean
+ COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
+ ${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
+ make distclean
+ COMMENT "Clean NuttX"
+ )
+
+ execute_process(
+ COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
+ ${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
+ ${nuttx_SOURCE_DIR}/tools/configure${SCRIPT_SUFFIX} -l ${BOARD_CONFIG}
+ RESULT_VARIABLE result
+ )
+ if(result)
+ message(FATAL_ERROR "Failed to run tools/configure")
+ endif()
+
+ add_custom_target(copy_swift_example
+ COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_SOURCE_DIR}/leds_swift ${apps_SOURCE_DIR}/examples/leds_swift
+ COMMENT "Copying leds_swift example to nuttx-apps"
+ )
+
+ add_custom_target(build_nuttx ALL
+ COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
+ ${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
+ make ${TRACEFLAG} -j ${JOB_POOLS}
+ DEPENDS copy_swift_example
+ COMMENT "Building NuttX"
+ )
+
+ add_custom_command(
+ TARGET build_nuttx
+ POST_BUILD
+ COMMAND ${CMAKE_COMMAND} -E copy ${nuttx_SOURCE_DIR}/nuttx ${CMAKE_BINARY_DIR}/nuttx.elf
+ )
+
+ add_custom_target(export_nuttx
+ COMMAND ${CMAKE_COMMAND} -E chdir ${nuttx_SOURCE_DIR}
+ ${CMAKE_COMMAND} -E env PATH=${nuttx_SOURCE_DIR}/tools:$ENV{PATH}
+ make export
+ COMMENT "Exporting NuttX"
+ )
+
+ add_custom_target(extract_nuttx_export
+ COMMAND ${CMAKE_COMMAND} -E tar xzf ${nuttx_SOURCE_DIR}/nuttx-export-12.7.0.tar.gz
+ WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+ COMMAND ${CMAKE_COMMAND} -E remove ${nuttx_SOURCE_DIR}/nuttx-export-12.7.0.tar.gz
+ DEPENDS export_nuttx
+ COMMENT "Extracting NuttX export"
+ )
+
+ add_custom_target(nuttx-libs
+ DEPENDS build_nuttx export_nuttx extract_nuttx_export
+ )
+endif()
diff --git a/nuttx-riscv-blink/README.md b/nuttx-riscv-blink/README.md
new file mode 100644
index 00000000..4a472393
--- /dev/null
+++ b/nuttx-riscv-blink/README.md
@@ -0,0 +1,71 @@
+# Swift 6 on NuttX RTOS using CMake
+
+## Description
+
+Run blink rv32-blink_leds (QEMU) example on NuttX RTOS.
+
+> [!NOTE]
+> CMake is adapted to build NuttX and NuttX-apps (Makefiles) with Swift 6.
+
+## Requirements
+
+- [NuttX](https://github.com/apache/nuttx) & [NuttX-apps](https://github.com/apache/nuttx-apps)
+- [kconfig-frontends](https://bitbucket.org/nuttx/tools)
+- [CMake](https://cmake.org/download/)
+- [QEMU](https://www.qemu.org/)
+- [Swift 6](https://swift.org/download/) - Swift 6.1 or greater
+- [RISC-V GNU Toolchain](https://github.com/riscv-collab/riscv-gnu-toolchain/releases)
+
+## How to build
+
+```bash
+# list all supported boards
+cmake -B build -DLIST_ALL_BOARDS=ON | less
+# build configuration
+cmake -B build -GNinja -DBOARD_CONFIG=rv-virt:leds_swift -DENABLE_NUTTX_TRACE=[ON|OFF]
+# build
+cmake --build build
+# clean
+cmake --build build -t distclean
+# export NuttX as library
+cmake --build build -t nuttx-libs
+```
+
+- **Output**
+```bash
+qemu-system-riscv32 \
+ -semihosting \
+ -M virt,aclint=on \
+ -cpu rv32 -smp 8 \
+ -bios none \
+ -kernel build/nuttx.elf -nographic
+NuttShell (NSH) NuttX-12.7.0
+nsh> leds_swift
+leds_main: led_daemon started
+
+led_daemon (pid# 4): Running
+led_daemon: Opening /dev/userleds
+led_daemon: Supported LEDs 0x7
+led_daemon: LED set 0x1
+board_userled: LED 1 set to 1
+board_userled: LED 2 set to 0
+board_userled: LED 3 set to 0
+nsh> led_daemon: LED set 0x0
+board_userled: LED 1 set to 0
+board_userled: LED 2 set to 0
+board_userled: LED 3 set to 0
+led_daemon: LED set 0x1
+board_userled: LED 1 set to 1
+board_userled: LED 2 set to 0
+board_userled: LED 3 set to 0
+led_daemon: LED set 0x0
+# [...] see output in QEMU
+```
+
+Quit from QEMU: `Ctrl-a x`
+
+## References
+
+- [Nuttx - Compiling with CMake](https://nuttx.apache.org/docs/latest/quickstart/compiling_cmake.html)
+- [NuttX - C++ Example using CMake](https://nuttx.apache.org/docs/latest/guides/cpp_cmake.html)
+- [NuttX - leds_rust](https://lupyuen.github.io/articles/rust6)
diff --git a/nuttx-riscv-blink/defconfig b/nuttx-riscv-blink/defconfig
new file mode 100644
index 00000000..5091081e
--- /dev/null
+++ b/nuttx-riscv-blink/defconfig
@@ -0,0 +1,76 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_DISABLE_OS_API is not set
+# CONFIG_NSH_DISABLE_LOSMART is not set
+CONFIG_16550_ADDRWIDTH=0
+CONFIG_16550_UART0=y
+CONFIG_16550_UART0_BASE=0x10000000
+CONFIG_16550_UART0_CLOCK=3686400
+CONFIG_16550_UART0_IRQ=37
+CONFIG_16550_UART0_SERIAL_CONSOLE=y
+CONFIG_16550_UART=y
+CONFIG_ARCH="risc-v"
+CONFIG_ARCH_BOARD="rv-virt"
+CONFIG_ARCH_BOARD_QEMU_RV_VIRT=y
+CONFIG_ARCH_CHIP="qemu-rv"
+# CONFIG_ARCH_CHIP_QEMU_RV64=y
+CONFIG_ARCH_CHIP_QEMU_RV=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_A=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_C=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_M=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BCH=y
+CONFIG_BOARDCTL_POWEROFF=y
+CONFIG_BOARD_LATE_INITIALIZE=y
+CONFIG_BOARD_LOOPSPERMSEC=6366
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEVICE_TREE=y
+CONFIG_DEV_ZERO=y
+CONFIG_ELF=y
+# CONFIG_EXAMPLES_HELLO=y
+CONFIG_EXAMPLES_LEDS=y
+CONFIG_EXAMPLES_LEDS_SWIFT=y
+CONFIG_FS_HOSTFS=y
+CONFIG_FS_PROCFS=y
+CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INIT_STACKSIZE=3072
+CONFIG_LIBC_ENVPATH=y
+CONFIG_LIBC_EXECFUNCS=y
+CONFIG_LIBC_PERROR_STDOUT=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_LIBM=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_PATH_INITIAL="/system/bin"
+CONFIG_RAM_SIZE=33554432
+CONFIG_RAM_START=0x80000000
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RISCV_SEMIHOSTING_HOSTFS=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SERIAL_UART_ARCH_MMIO=y
+CONFIG_STACK_COLORATION=y
+CONFIG_START_MONTH=12
+CONFIG_START_YEAR=2021
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_NSH_STACKSIZE=3072
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_USEC_PER_TICK=1000
+CONFIG_USERLED=y
+CONFIG_USERLED_LOWER=y
diff --git a/nuttx-riscv-blink/leds_swift/BridgingHeader.h b/nuttx-riscv-blink/leds_swift/BridgingHeader.h
new file mode 100644
index 00000000..7b2ceba1
--- /dev/null
+++ b/nuttx-riscv-blink/leds_swift/BridgingHeader.h
@@ -0,0 +1,124 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift open source project
+//
+// Copyright (c) 2024 Apple Inc. and the Swift project authors.
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+//
+//===----------------------------------------------------------------------===//
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define LED_DEVPATH "/dev/userleds"
+
+const int LEDS_PRIORITY = CONFIG_EXAMPLES_LEDS_PRIORITY;
+const int LEDS_STACKSIZE = CONFIG_EXAMPLES_LEDS_STACKSIZE;
+
+static bool g_led_daemon_started = false;
+
+static void sigterm_action(int signo, siginfo_t *siginfo, void *arg) {
+ if (signo == SIGTERM) {
+ printf("SIGTERM received\n");
+ g_led_daemon_started = false;
+ printf("led_daemon: Terminated.\n");
+ } else {
+ printf("\nsigterm_action: Received signo=%d siginfo=%p arg=%p\n", signo,
+ (void *)siginfo, arg);
+ }
+}
+
+int led_daemon(int argc, char *argv[]) {
+ userled_set_t supported = 0;
+ userled_set_t ledset = 0;
+ bool incrementing = true;
+
+ struct sigaction act = {.sa_sigaction = sigterm_action,
+ .sa_flags = SA_SIGINFO};
+
+ sigemptyset(&act.sa_mask);
+ sigaddset(&act.sa_mask, SIGTERM);
+
+ if (sigaction(SIGTERM, &act, NULL) != 0) {
+ printf("Failed to install SIGTERM handler, errno=%d\n", errno);
+ return EXIT_FAILURE;
+ }
+
+ pid_t mypid = getpid();
+ g_led_daemon_started = true;
+ printf("\nled_daemon (pid# %d): Running\n", mypid);
+
+ printf("led_daemon: Opening %s\n", CONFIG_EXAMPLES_LEDS_DEVPATH);
+ int fd = open(CONFIG_EXAMPLES_LEDS_DEVPATH, O_WRONLY);
+ if (fd < 0) {
+ printf("led_daemon: ERROR: Failed to open %s: %d\n",
+ CONFIG_EXAMPLES_LEDS_DEVPATH, errno);
+ g_led_daemon_started = false;
+ return EXIT_FAILURE;
+ }
+
+ int ret = ioctl(fd, ULEDIOC_SUPPORTED, (unsigned long)&supported);
+ if (ret < 0) {
+ printf("led_daemon: ERROR: ioctl(ULEDIOC_SUPPORTED) failed: %d\n", errno);
+ close(fd);
+ g_led_daemon_started = false;
+ return EXIT_FAILURE;
+ }
+
+ printf("led_daemon: Supported LEDs 0x%x\n", supported);
+ supported &= CONFIG_EXAMPLES_LEDS_LEDSET;
+
+ while (g_led_daemon_started) {
+ userled_set_t newset = 0;
+ userled_set_t tmp = 0;
+
+ if (incrementing) {
+ tmp = ledset;
+ while (newset == ledset) {
+ tmp++;
+ newset = tmp & supported;
+ }
+
+ if (newset == 0) {
+ incrementing = false;
+ continue;
+ }
+ } else {
+ if (ledset == 0) {
+ incrementing = true;
+ continue;
+ }
+
+ tmp = ledset;
+ while (newset == ledset) {
+ tmp--;
+ newset = tmp & supported;
+ }
+ }
+
+ ledset = newset;
+ printf("led_daemon: LED set 0x%x\n", ledset);
+
+ ret = ioctl(fd, ULEDIOC_SETALL, (unsigned long)ledset);
+ if (ret < 0) {
+ printf("led_daemon: ERROR: ioctl(ULEDIOC_SETALL) failed: %d\n", errno);
+ close(fd);
+ g_led_daemon_started = false;
+ return EXIT_FAILURE;
+ }
+
+ usleep(500 * 1000);
+ }
+
+ close(fd);
+ return EXIT_SUCCESS;
+}
\ No newline at end of file
diff --git a/nuttx-riscv-blink/leds_swift/Kconfig b/nuttx-riscv-blink/leds_swift/Kconfig
new file mode 100644
index 00000000..e39ce088
--- /dev/null
+++ b/nuttx-riscv-blink/leds_swift/Kconfig
@@ -0,0 +1,30 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config EXAMPLES_LEDS_SWIFT
+ tristate "\"LEDs Swift\" example"
+ default y
+ depends on USERLED
+ ---help---
+ Enable the \"LEDs Swift\" example
+
+if EXAMPLES_LEDS_SWIFT
+
+config EXAMPLES_LEDS_SWIFT_PROGNAME
+ string "Program name"
+ default "leds_swift"
+ ---help---
+ This is the name of the program that will be used when the NSH ELF
+ program is installed.
+
+config EXAMPLES_LEDS_SWIFT_PRIORITY
+ int "LEDs Swift task priority"
+ default 100
+
+config EXAMPLES_LEDS_SWIFT_STACKSIZE
+ int "LEDs Swift stack size"
+ default DEFAULT_TASK_STACKSIZE
+
+endif
diff --git a/nuttx-riscv-blink/leds_swift/Make.defs b/nuttx-riscv-blink/leds_swift/Make.defs
new file mode 100644
index 00000000..9070565f
--- /dev/null
+++ b/nuttx-riscv-blink/leds_swift/Make.defs
@@ -0,0 +1,24 @@
+############################################################################
+# apps/examples/leds_swift/Make.defs
+#
+# Copyright (c) 2024 Apple Inc. and the Swift project authors.
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifneq ($(CONFIG_EXAMPLES_LEDS_SWIFT),)
+CONFIGURED_APPS += $(APPDIR)/examples/leds_swift
+endif
diff --git a/nuttx-riscv-blink/leds_swift/Makefile b/nuttx-riscv-blink/leds_swift/Makefile
new file mode 100644
index 00000000..e2fc7df4
--- /dev/null
+++ b/nuttx-riscv-blink/leds_swift/Makefile
@@ -0,0 +1,38 @@
+############################################################################
+# apps/examples/leds_swift/Makefile
+#
+# Copyright (c) 2024 Apple Inc. and the Swift project authors.
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+# Blink in Swift Embedded Example
+
+MAINSRC = $(wildcard *.swift) $(wildcard *.h)
+
+# leds_swift built-in application info
+
+SWIFTFLAGS += -import-bridging-header BridgingHeader.h -I$(TOPDIR)/include
+SWIFTFLAGS += -Xfrontend -function-sections -Xfrontend -disable-stack-protector
+SWIFTFLAGS += -Xfrontend -enable-single-module-llvm-emission
+PROGNAME = $(CONFIG_EXAMPLES_LEDS_SWIFT_PROGNAME)
+PRIORITY = $(CONFIG_EXAMPLES_LEDS_SWIFT_PRIORITY)
+STACKSIZE = $(CONFIG_EXAMPLES_LEDS_SWIFT_STACKSIZE)
+MODULE = $(CONFIG_EXAMPLES_LEDS_SWIFT)
+
+include $(APPDIR)/Application.mk
diff --git a/nuttx-riscv-blink/leds_swift/leds_swift.swift b/nuttx-riscv-blink/leds_swift/leds_swift.swift
new file mode 100644
index 00000000..1cadcf47
--- /dev/null
+++ b/nuttx-riscv-blink/leds_swift/leds_swift.swift
@@ -0,0 +1,30 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift open source project
+//
+// Copyright (c) 2024 Apple Inc. and the Swift project authors.
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+//
+//===----------------------------------------------------------------------===//
+
+@_cdecl("leds_swift_main")
+public func cMain(
+ _ argc: Int32, _ argv: UnsafeMutablePointer?>
+) -> Int32 {
+ let ret = task_create(
+ "led_daemon",
+ LEDS_PRIORITY,
+ LEDS_STACKSIZE,
+ led_daemon,
+ nil)
+
+ if ret < 0 {
+ print("leds_main: ERROR: Failed to start led_daemon")
+ return ret
+ }
+
+ print("leds_main: led_daemon started")
+ return 0
+}