3 CMSIS-Core (Cortex-M) implements the basic run-time system for a Cortex-M device and gives the user access to the processor core and the device peripherals.
5 - <b>Hardware Abstraction Layer (HAL)</b> for Cortex-M processor registers with standardized definitions for the SysTick, NVIC, System Control Block registers, MPU registers, FPU registers, and core access functions.
6 - <b>System exception names</b> to interface to system exceptions without having compatibility issues.
7 - <b>Methods to organize header files</b> that makes it easy to learn new Cortex-M microcontroller products and improve software portability. This includes naming conventions for device-specific interrupts.
8 - <b>Methods for system initialization</b> to be used by each MCU vendor. For example, the standardized SystemInit() function is essential for configuring the clock system of the device.
9 - <b>Intrinsic functions</b> used to generate CPU instructions that are not supported by standard C functions.
10 - A variable to determine the <b>system clock frequency</b> which simplifies the setup the SysTick timer.
13 The following sections provide details about the CMSIS-Core (Cortex-M):
14 - \ref using_pg describes the project setup and shows a simple program example.
16 - \ref using_TrustZone_pg "Using TrustZone® for Armv8-M" describes how to use the security extensions available in the Armv8-M architecture.
18 - \ref templates_pg describes the files of the CMSIS-Core (Cortex-M) in detail and explains how to adapt template files provided by Arm to silicon vendor devices.
19 - \ref coreMISRA_Exceptions_pg describes the violations to the MISRA standard.
20 - <a href="Modules.html">\b Reference </a> describe the features and functions of the \ref device_h_pg in detail.
21 - <a href="Annotated.html">\b Data \b Structures </a> describe the data structures of the \ref device_h_pg in detail.
25 CMSIS-Core (Cortex-M) in ARM::CMSIS Pack
26 -----------------------------
28 Files relevant to CMSIS-Core (Cortex-M) are present in the following <b>ARM::CMSIS</b> directories:
29 |File/Folder |Content |
30 |------------------------------|------------------------------------------------------------------------|
31 |\b CMSIS\\Documentation\\Core | This documentation |
32 |\b CMSIS\\Core\\Include | CMSIS-Core (Cortex-M) header files (for example core_cm3.h, core_cmInstr.h, etc.) |
33 |\b Device | \ref using_ARM_pg "Arm reference implementations" of Cortex-M devices |
34 |\b Device\\\_Template_Vendor | \ref templates_pg for extension by silicon vendors |
38 \section ref_v6-v8M Processor Support
40 CMSIS supports the complete range of <a href="https://developer.arm.com/products/processors/cortex-m" target="_blank"><b>Cortex-M processors</b></a> and
41 the <a href="https://developer.arm.com/architectures/cpu-architecture/m-profile" target="_blank"><b>Armv8-M/v8.1-M architecture</b></a> including security extensions.
43 \subsection ref_man_sec Cortex-M Generic User Guides
45 The Cortex-M Device Generic User Guides contain the programmers model and detailed information about the core peripherals and are available for:
47 - <a href="https://developer.arm.com/documentation/dui0497a/latest/" target="_blank"><b>Cortex-M0 Devices Generic User Guide</b></a> (Armv6-M architecture)
48 - <a href="https://developer.arm.com/documentation/dui0662/latest/" target="_blank"><b>Cortex-M0+ Devices Generic User Guide</b></a> (Armv6-M architecture)
49 - <a href="https://developer.arm.com/documentation/dui0552/latest/" target="_blank"><b>Cortex-M3 Devices Generic User Guide</b></a> (Armv7-M architecture)
50 - <a href="https://developer.arm.com/documentation/dui0553/latest/" target="_blank"><b>Cortex-M4 Devices Generic User Guide</b></a> (Armv7-M architecture)
51 - <a href="https://developer.arm.com/documentation/dui0646/latest/" target="_blank"><b>Cortex-M7 Devices Generic User Guide</b></a> (Armv7-M architecture)
52 - <a href="https://developer.arm.com/documentation/dui1095/latest/" target="_blank"><b>Cortex-M23 Devices Generic User Guide</b></a> (Armv8-M architecture)
53 - <a href="https://developer.arm.com/documentation/100235/latest/" target="_blank"><b>Cortex-M33 Devices Generic User Guide</b></a> (Armv8-M architecture)
54 - <a href="https://developer.arm.com/documentation/101273/latest/" target="_blank"><b>Cortex-M55 Devices Generic User Guide</b></a> (Armv8.1-M architecture)
56 CMSIS also supports the following Cortex-M processor variants:
57 - <a href="https://developer.arm.com/products/processors/cortex-m/cortex-m1" target="_blank"><b>Cortex-M1</b></a> is a processor designed specifically for implementation in FPGAs (Armv6-M architecture).
58 - <a href="https://developer.arm.com/products/processors/cortex-m/sc000-processor" target="_blank"><b>SecurCore SC000</b></a> is designed specifically for smartcard and security applications (Armv6-M architecture).
59 - <a href="https://developer.arm.com/products/processors/cortex-m/sc300-processor" target="_blank"><b>SecurCore SC300</b></a> is designed specifically for smartcard and security applications (Armv7-M architecture).
60 - <a href="https://developer.arm.com/products/processors/cortex-m/cortex-m35p" target="_blank"><b>Cortex-M35P</b></a> is a temper resistant Cortex-M processor with optional software isolation using TrustZone for Armv8-M.
62 \subsection ARMv8M Armv8-M and Armv8.1-M Architecture
64 Armv8-M introduces two profiles \b baseline (for power and area constrained applications) and \b mainline (full-featured with optional SIMD, floating-point, and co-processor extensions).
65 Both Armv8-M profiles and Armv8.1-M are supported by CMSIS.
67 The Armv8-M architecture is described in the <a href="https://developer.arm.com/documentation/ddi0553/latest/" target="_blank"><b>Armv8-M Architecture Reference Manual</b></a>.
69 The Armv8.1-M architecture further extends Armv8-M with Helium (the so called M-Profile Vector Extension (MVE)), as well as further instruction set and debug extensions.
70 More information about Armv8.1-M architecture is available under <a href="https://developer.arm.com/technologies/helium" target="_blank"><b>Arm Helium technology</b></a>.
74 \section tested_tools_sec Tested and Verified Toolchains
76 The \ref templates_pg supplied by Arm have been tested and verified with the following toolchains:
77 - Arm: Arm Compiler 5.06 update 6 (not for Cortex-M23/33/35P/55, Armv8-M, Armv8.1-M)
78 - Arm: Arm Compiler 6.14
79 - Arm: Arm Compiler 6.6.2 (not for Cortex-M0/23/33/35P/55, Armv8-M, Armv8.1-M)
80 - GNU: GNU Arm Embedded Toolchain 10-2020-q4-major (10.2.1 20201103)
81 - IAR: IAR ANSI C/C++ Compiler for Arm 8.20.1.14183
83 /*=======0=========1=========2=========3=========4=========5=========6=========7=========8=========9=========0=========1====*/
86 \page core_revisionHistory Revision History of CMSIS-Core (Cortex-M)
88 <table class="cmtable" summary="Revision History">
97 Added: Cortex-M55 cpu support
98 Enhanced: MVE support for Armv8.1-MML
100 Fixed: Device config define checks
101 Added: L1 Cache functions for Armv7-M and later
107 Added: Provisions for compiler-independent C startup code.
113 Fixed: Compilation issue in cmsis_armclang_ltm.h introduced in 5.2.0
119 Added: Cortex-M35P support.\n
120 Added: Cortex-M1 support.\n
121 Added: Armv8.1 architecture support.\n
122 Added: \ref __RESTRICT and \ref __STATIC_FORCEINLINE compiler control macros.
128 Removed using get/set built-ins FPSCR in GCC >= 7.2 due to shortcomings.\n
129 Added __NO_RETURN to __NVIC_SystemReset() to silence compiler warnings.\n
130 Added support for Cortex-M1 (beta). \n
131 Removed usage of register keyword. \n
132 Added defines for EXC_RETURN, FNC_RETURN and integrity signature values. \n
133 Enhanced MPUv7 API with defines for memory access attributes.
139 Aligned MSPLIM and PSPLIM access functions along supported compilers.
145 Added MPU Functions for ARMv8-M for Cortex-M23/M33.\n
146 Moved __SSAT and __USAT intrinsics to CMSIS-Core.\n
147 Aligned __REV, __REV16 and __REVSH intrinsics along supported compilers.
153 Added macros \ref \__UNALIGNED_UINT16_READ, \ref \__UNALIGNED_UINT16_WRITE.\n
154 Added macros \ref \__UNALIGNED_UINT32_READ, \ref \__UNALIGNED_UINT32_WRITE.\n
155 Deprecated macro \ref \__UNALIGNED_UINT32.\n
156 Changed \ref version_control_gr macros to be core agnostic. \n
157 Added \ref mpu_functions for Cortex-M0+/M3/M4/M7.
163 Added: macro \ref \__PACKED_STRUCT. \n
164 Added: uVisor support. \n
170 Added: Cortex-M23, Cortex-M33 support.\n
171 Added: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
172 Replaced: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
173 Reworked: SAU register and functions. \n
174 Added: macro \ref \__ALIGNED. \n
175 Updated: function \ref SCB_EnableICache. \n
176 Added: cmsis_compiler.h with compiler specific CMSIS macros, functions, instructions. \n
177 Added: macro \ref \__PACKED. \n
178 Updated: compiler specific include files. \n
179 Updated: core dependant include files. \n
180 Removed: deprecated files core_cmfunc.h, core_cminstr.h, core_cmsimd.h.
184 <td>V5.00<br>Beta 6</td>
186 Added: SCB_CFSR register bit definitions. \n
187 Added: function \ref NVIC_GetEnableIRQ. \n
188 Updated: core instruction macros \ref \__NOP, \ref \__WFI, \ref \__WFE, \ref \__SEV for toolchain GCC.
192 <td>V5.00<br>Beta 5</td>
194 Moved: DSP libraries from CMSIS/DSP/Lib to CMSIS/Lib. \n
195 Added: DSP libraries build projects to CMSIS pack.
199 <td>V5.00<br>Beta 4</td>
201 Updated: ARMv8M device files. \n
202 Corrected: ARMv8MBL interrupts. \n
203 Reworked: NVIC functions.
207 <td>V5.00<br>Beta 2</td>
209 Changed: ARMv8M SAU regions to 8. \n
211 Changed: moved function \ref TZ_SAU_Setup to file partition_<device>.h. \n
213 Changed: license under Apache-2.0. \n
214 Added: check if macro is defined before use. \n
215 Corrected: function \ref SCB_DisableDCache. \n
216 Corrected: macros \ref \_VAL2FLD, \ref \_FLD2VAL. \n
217 Added: NVIC function virtualization with macros \ref CMSIS_NVIC_VIRTUAL and \ref CMSIS_VECTAB_VIRTUAL.
221 <td>V5.00<br>Beta 1</td>
223 Renamed: cmsis_armcc_V6.h to cmsis_armclang.h.\n
224 Renamed: core\_*.h to lower case.\n
225 Added: function \ref SCB_GetFPUType to all CMSIS cores.\n
226 Added: ARMv8-M support.
232 Corrected: DoxyGen function parameter comments.\n
233 Corrected: IAR toolchain: removed for \ref NVIC_SystemReset the attribute(noreturn).\n
234 Corrected: GCC toolchain: suppressed irrelevant compiler warnings.\n
235 Added: Support files for Arm Compiler v6 (cmsis_armcc_v6.h).
241 Corrected: MISRA-C:2004 violations. \n
242 Corrected: predefined macro for TI CCS Compiler. \n
243 Corrected: function \ref __SHADD16 in arm_math.h. \n
244 Updated: cache functions for Cortex-M7. \n
245 Added: macros \ref _VAL2FLD, \ref _FLD2VAL to core\_*.h. \n
246 Updated: functions \ref __QASX, \ref __QSAX, \ref __SHASX, \ref __SHSAX. \n
247 Corrected: potential bug in function \ref __SHADD16.
253 Corrected: MISRA-C:2004 violations. \n
254 Corrected: intrinsic functions \ref __DSB, \ref __DMB, \ref __ISB. \n
255 Corrected: register definitions for ITCMCR register. \n
256 Corrected: register definitions for \ref CONTROL_Type register. \n
257 Added: functions \ref SCB_GetFPUType, \ref SCB_InvalidateDCache_by_Addr to core_cm7.h. \n
258 Added: register definitions for \ref APSR_Type, \ref IPSR_Type, \ref xPSR_Type register. \n
259 Added: \ref __set_BASEPRI_MAX function to core_cmFunc.h. \n
260 Added: intrinsic functions \ref __RBIT, \ref __CLZ for Cortex-M0/CortexM0+. \n
266 Added: Cortex-M7 support.\n
267 Added: intrinsic functions for \ref __RRX, \ref __LDRBT, \ref __LDRHT, \ref __LDRT, \ref __STRBT, \ref __STRHT, and \ref __STRT \n
272 <td>Corrected: C++ include guard settings.\n</td>
277 Added: COSMIC tool chain support.\n
278 Corrected: GCC __SMLALDX instruction intrinsic for Cortex-M4.\n
279 Corrected: GCC __SMLALD instruction intrinsic for Cortex-M4.\n
280 Corrected: GCC/CLang warnings.\n
286 Added: \ref __BKPT instruction intrinsic.\n
287 Added: \ref __SMMLA instruction intrinsic for Cortex-M4.\n
288 Corrected: \ref ITM_SendChar.\n
289 Corrected: \ref __enable_irq, \ref __disable_irq and inline assembly for GCC Compiler.\n
290 Corrected: \ref NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. \n
291 Corrected: rework of in-line assembly functions to remove potential compiler warnings.\n
296 <td>Added support for Cortex-M0+ processor.\n</td>
301 Added support for GNU GCC ARM Embedded Compiler. \n
302 Added function \ref __ROR.\n
303 Added \ref regMap_pg for TPIU, DWT. \n
304 Added support for \ref core_config_sect "SC000 and SC300 processors".\n
305 Corrected \ref ITM_SendChar function. \n
306 Corrected the functions \ref __STREXB, \ref __STREXH, \ref __STREXW for the GNU GCC compiler section. \n
307 Documentation restructured.
313 Updated documentation.\n
314 Updated CMSIS core include files.\n
315 Changed CMSIS/Device folder structure.\n
316 Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library.\n
317 Reworked CMSIS DSP library examples.
322 <td>Added support for Cortex-M4 processor.</td>
327 Reworked Startup Concept.\n
328 Added additional Debug Functionality.\n
329 Changed folder structure.\n
330 Added doxygen comments.\n
331 Added definitions for bit.
336 <td>Added support for Cortex-M0 processor.</td>
340 <td>Added intrinsic functions for \ref __LDREXB, \ref __LDREXH, \ref __LDREXW, \ref __STREXB, \ref __STREXH, \ref __STREXW, and \ref __CLREX</td>
344 <td>Initial Release for Cortex-M3 processor.</td>