This is the first major CMSIS 6 release

Changes since CMSIS 5.9.0

CMSIS-Core: 6.0.0

• Core(M) and Core(A) joined into single Core component
• Core header files reworked, aligned with TRMs
• Previously deprecated features removed
• Dropped support for Arm Compiler 5

CMSIS-DSP: moved into separate pack

CMSIS-NN: moved into separate pack

CMSIS-RTOS: deprecated and removed

• RTX4 is deprecated and removed

CMSIS-RTOS2: 2.3.0

• OS Tick API moved from Device to CMSIS class
• Provisional support for processor affinity in SMP systems
• RTX5 moved into separate CMSIS-RTX pack

CMSIS-Driver: 2.9.0

• Updated VIO API 1.0.0
• Added GPIO Driver API 1.0.0

CMSIS-DAP: Moved into separate pack

CMSIS-Pack: Moved to Open-CMSIS-Pack

CMSIS-SVD: Moved to Open-CMSIS-Pack

Devices: Moved to Cortex_DFP pack

Utilities: Moved to CMSIS-Toolbox

Compiler Support

Support for compilers changed to recent versions of the following list.

• Arm Compiler 6 version 6.10 or later
• IAR Compiler for Arm version 8 or later
• GNU Compiler version 10 or later
• LLVM/Clang Compiler version 17 or later

Software Components

This base pack ARM::CMSIS@6.0.0 does not contain the full set of software components that where previously part of the pack in major version 5. Instead, this pack only ships the following basic components and API definitions:

• CMSIS-Core
• CMSIS-RTOS2 API
• CMSIS-Driver APIs

Additional components have been moved into other packs which can be installed separately if required.

• Pseudo-device support with processor-core only is now in the pack ARM::Cortex_DFP.
• CMSIS-RTX5 is now in the pack ARM::CMSIS-RTX.
• CMSIS-DSP has moved into the pack ARM::CMSIS-DSP a while ago.
• CMSIS-NN has moved into the pack ARM::CMSIS-NN a while ago.
• I/O retargeting support is now in the pack ARM::CMSIS-Compiler.
• EventRecorder is now in the pack ARM::CMSIS-View.
• Utilities (PackChk, SVDConv) are now part of CMSIS-Toolbox.

Migration guides

Migration guide for projects using CMSIS v5.9.0
Migration guide for CMSIS-Pack creators