README

This is a quick experiment with embedded swift and CMSIS-DSP.

How to build

First, you need to install embedded swift. On my Mac, it was installed in $HOME/Library/Developer/Toolchains/swift-latest.xctoolchain and the CMakeLists.txt is using:

set(TOOLCHAIN_PATH "$ENV{HOME}/Library/Developer/Toolchains/swift-latest.xctoolchain/Info.plist")

The initial CMakeLists.txt was generated with CMSIS build tools. As consequence you need an installation of the CMSIS build tools and the CMSIS packs that are used by this example.

As you can see from the CMakeLists.txt, the packs used are:

"${CPACK}/ARM/CMSIS-DSP/1.15.0"
"${CPACK}/ARM/CMSIS/6.0.0
"${CPACK}/ARM/V2M_MPS3_SSE_300_BSP/"

You need to customize the CMakeLists.txt to use the right configuration from the CMSIS build tools:

set(TOOLCHAIN_VERSION_MIN "18.1.3")
include ("${CTOOLS}/etc/CLANG.18.1.3.cmake")

Here we use the ARM clang that you can get here : https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm

When all is installed and configured, you can do:

mkdir -p cprj/tmp/test/VHT-Corstone-300/Release
cd build
cmake -DPROJ="....swift-bare-metal" \
  -DCPACK="....cpacks" \
  -DCTOOLS="....ctools" \
  ..

The paths are:

• Path to this project
• Path to the pack folder used by CMSIS build tools
• Path to the CMSIS build tools (containing a folder etc with .cmake files for the compilers)

Once cmake as been used, you now have a Makefile and can type make to build.

How to run

Now you can run the generated .elf on a FVP_Corstone_SSE-300

How to edit

You can use vscode to have the Swift completion and color syntax highlighting. You need to install the extension Swift Language Support for Visual Studio Code

Problems

Embedded swift does not yet support the v8.1m architecture. CMSIS-DSP is compiled with v8.1m and supports Helium.

Embedded swift in this example is targetting armv7em-none-none-eabi and I mix both at the end ... so it is not very clean but it works on this example (I don't claim it will always work)