CMSIS-Core is typically delivered as part of the broader or via open-source repositories. ARM-software/CMSIS_5: CMSIS Version 5 ... - GitHub
The is a vendor-independent hardware abstraction layer (HAL) that provides a standardized software interface to the processor core and peripherals of Arm Cortex-M devices . Downloading and integrating this component is essential for developers who want to ensure code portability and simplify the learning curve when moving between different microcontroller (MCU) families. Primary Download Sources cmsis-core (cortex-m) download