| CMSIS-CORE Version 3.20 CMSIS-CORE support for Cortex-M processor-based devices

- CMSIS
- CORE
- DSP
- RTOS API
- SVD

- Main Page
- Usage and Description
- Reference

All Data Structures Files Functions Variables Enumerations Enumerator Groups Pages
Overview

CMSIS-CORE implements the basic run-time system for a Cortex-M device and gives the user access to the processor core and the device peripherals. In detail it defines:

- Hardware Abstraction Layer (HAL) for Cortex-M processor registers with standardized definitions for the SysTick, NVIC, System Control Block registers, MPU registers, FPU registers, and core access functions.
- System exception names to interface to system exceptions without having compatibility issues.
- Methods to organize header files that makes it easy to learn new Cortex-M microcontroller products and improve software portability. This includes naming conventions for device-specific interrupts.
- Methods for system initialization to be used by each MCU vendor. For example, the standardized SystemInit() function is essential for configuring the clock system of the device.
- Intrinsic functions used to generate CPU instructions that are not supported by standard C functions.
- A variable to determine the system clock frequency which simplifies the setup the SysTick timer.

This chapter provides details about the CMSIS-CORE and contains the following sections:

- Using CMSIS in Embedded Applications describes the project setup and shows a simple program example.
- Template Files describes the files of the CMSIS-CORE in detail and explains how to adapt template files provided by ARM to silicon vendor devices.
- MISRA-C:2004 Compliance Exceptions describes the violations to the MISRA standard.
- Reference describe the features and functions of the Device Header File <device.h> in detail.
- Data Structures describe the data structures of the Device Header File <device.h> in detail.

# Cortex-M Reference Manuals

The Cortex-M Reference Manuals are generic user guides for devices that implement the various ARM Cortex-M processors. These manuals contain the programmers model and detailed information about the core peripherals.

- Cortex-M0 Devices Generic User Guide
- Cortex-M0+ Devices Generic User Guide
- Cortex-M3 Devices Generic User Guide
- Cortex-M4 Devices Generic User Guide

# Tested and Verified Toolchains

The CMSIS-CORE Template Files supplied by ARM have been tested and verified with the following toolchains:

- ARM: MDK-ARM Version 4.70 (or greater)
- GNU: GNU Tools ARM Embedded 4.7 2012.q4 (or greater)
- GNU: Sourcery G++ Lite Edition for ARM 2011.03-42 (or greater)
- IAR: IAR Embedded Workbench Kickstart Edition V6.10 (or greater)

Revision History of CMSIS-CORE

Version | Description
--- | ---
V3.20 | Added: __BKPT instruction intrinsic. Added: __SMMLA instruction intrinsic for Cortex-M4. Corrected: ITM_SendChar. Corrected: __enable_irq, __disable_irq and inline assembly for GCC Compiler. Corrected: NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. Corrected: rework of in-line assembly functions to remove potential compiler warnings.
V3.01 | Added support for Cortex-M0+ processor. Integration of CMSIS DSP Library version 1.1.0
V3.00 | Added support for GNU GCC ARM Embedded Compiler. Added function __ROR. Added Register Mapping for TPIU, DWT. Added support for SC000 and SC300 processors. Corrected ITM_SendChar function. Corrected the functions __STREXB, __STREXH, __STREXW for the GNU GCC compiler section. Documentation restructured.
V2.10 | Updated documentation. Updated CMSIS core include files. Changed CMSIS/Device folder structure. Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library. Reworked CMSIS DSP library examples.
V2.00 | Added support for Cortex-M4 processor.
V1.30 | Reworked Startup Concept. Added additional Debug Functionality. Changed folder structure. Added doxygen comments. Added definitions for bit.
V1.01 | Added support for Cortex-M0 processor.
V1.01 | Added intrinsic functions for __LDREXB, __LDREXH, __LDREXW, __STREXB, __STREXH, __STREXW, and __CLREX
V1.00 | Initial Release for Cortex-M3 processor.