CMSIS-CORE  Version 4.00
CMSIS-CORE support for Cortex-M processor-based devices
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Reference
Here is a list of all modules:
oPeripheral AccessDescribes naming conventions, requirements, and optional features for accessing peripherals
oSystem and Clock Configuration
oInterrupts and Exceptions (NVIC)Describes programming of interrupts and exception functions
oCore Register Access
oIntrinsic Functions for CPU Instructions
oIntrinsic Functions for SIMD Instructions [only Cortex-M4 and Cortex-M7]Access to dedicated SIMD instructions
oSystick Timer (SYSTICK)Initialize and start the SysTick timer
\Debug Access