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="http://www.arm.com/products/processors/instruction-set-architectures/armv8-m-architecture.php" target="_blank"><b>Armv8-M/v8.1-M architecture</b></a> including security extensions.
43 \subsection ref_man_sec Cortex-M Reference Manuals
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="http://infocenter.arm.com/help/topic/com.arm.doc.dui0497a/DUI0497A_cortex_m0_r0p0_generic_ug.pdf" target="_blank"><b>Cortex-M0 Devices Generic User Guide</b></a> (Armv6-M architecture)
48 - <a href="http://infocenter.arm.com/help/topic/com.arm.doc.dui0662b/DUI0662B_cortex_m0p_r0p1_dgug.pdf" target="_blank"><b>Cortex-M0+ Devices Generic User Guide</b></a> (Armv6-M architecture)
49 - <a href="http://infocenter.arm.com/help/topic/com.arm.doc.dui0552a/DUI0552A_cortex_m3_dgug.pdf" target="_blank"><b>Cortex-M3 Devices Generic User Guide</b></a> (Armv7-M architecture)
50 - <a href="http://infocenter.arm.com/help/topic/com.arm.doc.dui0553a/DUI0553A_cortex_m4_dgug.pdf" target="_blank"><b>Cortex-M4 Devices Generic User Guide</b></a> (ARMv7-M architecture)
51 - <a href="http://infocenter.arm.com/help/topic/com.arm.doc.dui0646a/DUI0646A_cortex_m7_dgug.pdf" target="_blank"><b>Cortex-M7 Devices Generic User Guide</b></a> (Armv7-M architecture)
54 The \b Cortex-M23 and \b Cortex-M33 are described with Technical Reference Manuals that are available here:
55 - <a href="http://infocenter.arm.com/help/topic/com.arm.doc.ddi0550c/cortex_m23_r1p0_technical_reference_manual_DDI0550C_en.pdf" target="_blank"><b>Cortex-M23 Technical Reference Manual</b></a> (Armv8-M baseline architecture)
56 - <a href="http://infocenter.arm.com/help/topic/com.arm.doc.100230_0002_00_en/cortex_m33_trm_100230_0002_00_en.pdf" target="_blank"><b>Cortex-M33 Technical Reference Manual</b></a> (Armv8-M mainline architecture)
58 CMSIS also supports the following Cortex-M processor variants:
59 - <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).
60 - <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).
61 - <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).
62 - <a href="https://developer.arm.com/products/processors/cortex-m/sc300-processor" target="_blank"><b>Cortex-M35P</b></a> is a temper resistant Cortex-M processor with optional software isolation using TrustZone for Armv8-M.
64 \subsection ARMv8M Armv8-M and Armv8.1-M Architecture
66 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).
67 Both Armv8-M profiles and Armv8.1M are supported by CMSIS.
69 The Armv8-M Architecture is described in the <a href="http://developer.arm.com/products/architecture/m-profile/docs/ddi0553/latest/armv8-m-architecture-reference-manual" target="_blank"><b>Armv8-M Architecture Reference Manual</b></a>.
71 The Armv8.1-M Architecture further extends Armv8-M with Helium, an Microcontroller Vector Extension (MVE) and further instruction set and debug extensions.
72 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>.
78 \section tested_tools_sec Tested and Verified Toolchains
80 The \ref templates_pg supplied by Arm have been tested and verified with the following toolchains:
81 - Arm: Arm Compiler 5.06 update 6 (not for Cortex-M23/33/35P, Armv8-M, Armv8.1-M)
82 - Arm: Arm Compiler 6.12
83 - Arm: Arm Compiler 6.6.2 (not for Cortex-M0/23/33/35P, Armv8-M, Armv8.1-M)
84 - GNU: GNU Tools for Arm Embedded 9.2.1 2019q4
85 - IAR: IAR ANSI C/C++ Compiler for Arm 8.20.1.14183
89 /*=======0=========1=========2=========3=========4=========5=========6=========7=========8=========9=========0=========1====*/
92 \page core_revisionHistory Revision History of CMSIS-Core (Cortex-M)
94 <table class="cmtable" summary="Revision History">
103 Added: Cortex-M55 support.
110 Added: Provisions for compiler-independent C startup code.
116 Fixed: Compilation issue in cmsis_armclang_ltm.h introduced in 5.2.0
122 Added: Cortex-M35P support.\n
123 Added: Cortex-M1 support.\n
124 Added: Armv8.1 architecture support.\n
125 Added: \ref __RESTRICT and \ref __STATIC_FORCEINLINE compiler control macros.
131 Removed using get/set built-ins FPSCR in GCC >= 7.2 due to shortcomings.\n
132 Added __NO_RETURN to __NVIC_SystemReset() to silence compiler warnings.\n
133 Added support for Cortex-M1 (beta). \n
134 Removed usage of register keyword. \n
135 Added defines for EXC_RETURN, FNC_RETURN and integrity signature values. \n
136 Enhanced MPUv7 API with defines for memory access attributes.
142 Aligned MSPLIM and PSPLIM access functions along supported compilers.
148 Added MPU Functions for ARMv8-M for Cortex-M23/M33.\n
149 Moved __SSAT and __USAT intrinsics to CMSIS-Core.\n
150 Aligned __REV, __REV16 and __REVSH intrinsics along supported compilers.
156 Added macros \ref \__UNALIGNED_UINT16_READ, \ref \__UNALIGNED_UINT16_WRITE.\n
157 Added macros \ref \__UNALIGNED_UINT32_READ, \ref \__UNALIGNED_UINT32_WRITE.\n
158 Deprecated macro \ref \__UNALIGNED_UINT32.\n
159 Changed \ref version_control_gr macros to be core agnostic. \n
160 Added \ref mpu_functions for Cortex-M0+/M3/M4/M7.
166 Added: macro \ref \__PACKED_STRUCT. \n
167 Added: uVisor support. \n
173 Added: Cortex-M23, Cortex-M33 support.\n
174 Added: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
175 Replaced: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
176 Reworked: SAU register and functions. \n
177 Added: macro \ref \__ALIGNED. \n
178 Updated: function \ref SCB_EnableICache. \n
179 Added: cmsis_compiler.h with compiler specific CMSIS macros, functions, instructions. \n
180 Added: macro \ref \__PACKED. \n
181 Updated: compiler specific include files. \n
182 Updated: core dependant include files. \n
183 Removed: deprecated files core_cmfunc.h, core_cminstr.h, core_cmsimd.h.
187 <td>V5.00<br>Beta 6</td>
189 Added: SCB_CFSR register bit definitions. \n
190 Added: function \ref NVIC_GetEnableIRQ. \n
191 Updated: core instruction macros \ref \__NOP, \ref \__WFI, \ref \__WFE, \ref \__SEV for toolchain GCC.
195 <td>V5.00<br>Beta 5</td>
197 Moved: DSP libraries from CMSIS/DSP/Lib to CMSIS/Lib. \n
198 Added: DSP libraries build projects to CMSIS pack.
202 <td>V5.00<br>Beta 4</td>
204 Updated: ARMv8M device files. \n
205 Corrected: ARMv8MBL interrupts. \n
206 Reworked: NVIC functions.
210 <td>V5.00<br>Beta 2</td>
212 Changed: ARMv8M SAU regions to 8. \n
214 Changed: moved function \ref TZ_SAU_Setup to file partition_<device>.h. \n
216 Changed: license under Apache-2.0. \n
217 Added: check if macro is defined before use. \n
218 Corrected: function \ref SCB_DisableDCache. \n
219 Corrected: macros \ref \_VAL2FLD, \ref \_FLD2VAL. \n
220 Added: NVIC function virtualization with macros \ref CMSIS_NVIC_VIRTUAL and \ref CMSIS_VECTAB_VIRTUAL.
224 <td>V5.00<br>Beta 1</td>
226 Renamed: cmsis_armcc_V6.h to cmsis_armclang.h.\n
227 Renamed: core\_*.h to lower case.\n
228 Added: function \ref SCB_GetFPUType to all CMSIS cores.\n
229 Added: ARMv8-M support.
235 Corrected: DoxyGen function parameter comments.\n
236 Corrected: IAR toolchain: removed for \ref NVIC_SystemReset the attribute(noreturn).\n
237 Corrected: GCC toolchain: suppressed irrelevant compiler warnings.\n
238 Added: Support files for Arm Compiler v6 (cmsis_armcc_v6.h).
244 Corrected: MISRA-C:2004 violations. \n
245 Corrected: predefined macro for TI CCS Compiler. \n
246 Corrected: function \ref __SHADD16 in arm_math.h. \n
247 Updated: cache functions for Cortex-M7. \n
248 Added: macros \ref _VAL2FLD, \ref _FLD2VAL to core\_*.h. \n
249 Updated: functions \ref __QASX, \ref __QSAX, \ref __SHASX, \ref __SHSAX. \n
250 Corrected: potential bug in function \ref __SHADD16.
256 Corrected: MISRA-C:2004 violations. \n
257 Corrected: intrinsic functions \ref __DSB, \ref __DMB, \ref __ISB. \n
258 Corrected: register definitions for ITCMCR register. \n
259 Corrected: register definitions for \ref CONTROL_Type register. \n
260 Added: functions \ref SCB_GetFPUType, \ref SCB_InvalidateDCache_by_Addr to core_cm7.h. \n
261 Added: register definitions for \ref APSR_Type, \ref IPSR_Type, \ref xPSR_Type register. \n
262 Added: \ref __set_BASEPRI_MAX function to core_cmFunc.h. \n
263 Added: intrinsic functions \ref __RBIT, \ref __CLZ for Cortex-M0/CortexM0+. \n
269 Added: Cortex-M7 support.\n
270 Added: intrinsic functions for \ref __RRX, \ref __LDRBT, \ref __LDRHT, \ref __LDRT, \ref __STRBT, \ref __STRHT, and \ref __STRT \n
275 <td>Corrected: C++ include guard settings.\n</td>
280 Added: COSMIC tool chain support.\n
281 Corrected: GCC __SMLALDX instruction intrinsic for Cortex-M4.\n
282 Corrected: GCC __SMLALD instruction intrinsic for Cortex-M4.\n
283 Corrected: GCC/CLang warnings.\n
289 Added: \ref __BKPT instruction intrinsic.\n
290 Added: \ref __SMMLA instruction intrinsic for Cortex-M4.\n
291 Corrected: \ref ITM_SendChar.\n
292 Corrected: \ref __enable_irq, \ref __disable_irq and inline assembly for GCC Compiler.\n
293 Corrected: \ref NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. \n
294 Corrected: rework of in-line assembly functions to remove potential compiler warnings.\n
299 <td>Added support for Cortex-M0+ processor.\n</td>
304 Added support for GNU GCC ARM Embedded Compiler. \n
305 Added function \ref __ROR.\n
306 Added \ref regMap_pg for TPIU, DWT. \n
307 Added support for \ref core_config_sect "SC000 and SC300 processors".\n
308 Corrected \ref ITM_SendChar function. \n
309 Corrected the functions \ref __STREXB, \ref __STREXH, \ref __STREXW for the GNU GCC compiler section. \n
310 Documentation restructured.
316 Updated documentation.\n
317 Updated CMSIS core include files.\n
318 Changed CMSIS/Device folder structure.\n
319 Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library.\n
320 Reworked CMSIS DSP library examples.
325 <td>Added support for Cortex-M4 processor.</td>
330 Reworked Startup Concept.\n
331 Added additional Debug Functionality.\n
332 Changed folder structure.\n
333 Added doxygen comments.\n
334 Added definitions for bit.
339 <td>Added support for Cortex-M0 processor.</td>
343 <td>Added intrinsic functions for \ref __LDREXB, \ref __LDREXH, \ref __LDREXW, \ref __STREXB, \ref __STREXH, \ref __STREXW, and \ref __CLREX</td>
347 <td>Initial Release for Cortex-M3 processor.</td>