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 8.2.1 2018q4
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">
102 Fixed: Compilation issue in cmsis_armclang_ltm.h introduced in 5.2.0
108 Added: Cortex-M35P support.\n
109 Added: Cortex-M1 support.\n
110 Added: Armv8.1 architecture support.\n
111 Added: \ref __RESTRICT and \ref __STATIC_FORCEINLINE compiler control macros.
117 Removed using get/set built-ins FPSCR in GCC >= 7.2 due to shortcomings.\n
118 Added __NO_RETURN to __NVIC_SystemReset() to silence compiler warnings.\n
119 Added support for Cortex-M1 (beta). \n
120 Removed usage of register keyword. \n
121 Added defines for EXC_RETURN, FNC_RETURN and integrity signature values. \n
122 Enhanced MPUv7 API with defines for memory access attributes.
128 Aligned MSPLIM and PSPLIM access functions along supported compilers.
134 Added MPU Functions for ARMv8-M for Cortex-M23/M33.\n
135 Moved __SSAT and __USAT intrinsics to CMSIS-Core.\n
136 Aligned __REV, __REV16 and __REVSH intrinsics along supported compilers.
142 Added macros \ref \__UNALIGNED_UINT16_READ, \ref \__UNALIGNED_UINT16_WRITE.\n
143 Added macros \ref \__UNALIGNED_UINT32_READ, \ref \__UNALIGNED_UINT32_WRITE.\n
144 Deprecated macro \ref \__UNALIGNED_UINT32.\n
145 Changed \ref version_control_gr macros to be core agnostic. \n
146 Added \ref mpu_functions for Cortex-M0+/M3/M4/M7.
152 Added: macro \ref \__PACKED_STRUCT. \n
153 Added: uVisor support. \n
159 Added: Cortex-M23, Cortex-M33 support.\n
160 Added: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
161 Replaced: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
162 Reworked: SAU register and functions. \n
163 Added: macro \ref \__ALIGNED. \n
164 Updated: function \ref SCB_EnableICache. \n
165 Added: cmsis_compiler.h with compiler specific CMSIS macros, functions, instructions. \n
166 Added: macro \ref \__PACKED. \n
167 Updated: compiler specific include files. \n
168 Updated: core dependant include files. \n
169 Removed: deprecated files core_cmfunc.h, core_cminstr.h, core_cmsimd.h.
173 <td>V5.00<br>Beta 6</td>
175 Added: SCB_CFSR register bit definitions. \n
176 Added: function \ref NVIC_GetEnableIRQ. \n
177 Updated: core instruction macros \ref \__NOP, \ref \__WFI, \ref \__WFE, \ref \__SEV for toolchain GCC.
181 <td>V5.00<br>Beta 5</td>
183 Moved: DSP libraries from CMSIS/DSP/Lib to CMSIS/Lib. \n
184 Added: DSP libraries build projects to CMSIS pack.
188 <td>V5.00<br>Beta 4</td>
190 Updated: ARMv8M device files. \n
191 Corrected: ARMv8MBL interrupts. \n
192 Reworked: NVIC functions.
196 <td>V5.00<br>Beta 2</td>
198 Changed: ARMv8M SAU regions to 8. \n
199 Changed: moved function \ref TZ_SAU_Setup to file partition_<device>.h. \n
200 Changed: license under Apache-2.0. \n
201 Added: check if macro is defined before use. \n
202 Corrected: function \ref SCB_DisableDCache. \n
203 Corrected: macros \ref \_VAL2FLD, \ref \_FLD2VAL. \n
204 Added: NVIC function virtualization with macros \ref CMSIS_NVIC_VIRTUAL and \ref CMSIS_VECTAB_VIRTUAL.
208 <td>V5.00<br>Beta 1</td>
210 Renamed: cmsis_armcc_V6.h to cmsis_armclang.h.\n
211 Renamed: core\_*.h to lower case.\n
212 Added: function \ref SCB_GetFPUType to all CMSIS cores.\n
213 Added: ARMv8-M support.
219 Corrected: DoxyGen function parameter comments.\n
220 Corrected: IAR toolchain: removed for \ref NVIC_SystemReset the attribute(noreturn).\n
221 Corrected: GCC toolchain: suppressed irrelevant compiler warnings.\n
222 Added: Support files for Arm Compiler v6 (cmsis_armcc_v6.h).
228 Corrected: MISRA-C:2004 violations. \n
229 Corrected: predefined macro for TI CCS Compiler. \n
230 Corrected: function \ref __SHADD16 in arm_math.h. \n
231 Updated: cache functions for Cortex-M7. \n
232 Added: macros \ref _VAL2FLD, \ref _FLD2VAL to core\_*.h. \n
233 Updated: functions \ref __QASX, \ref __QSAX, \ref __SHASX, \ref __SHSAX. \n
234 Corrected: potential bug in function \ref __SHADD16.
240 Corrected: MISRA-C:2004 violations. \n
241 Corrected: intrinsic functions \ref __DSB, \ref __DMB, \ref __ISB. \n
242 Corrected: register definitions for ITCMCR register. \n
243 Corrected: register definitions for \ref CONTROL_Type register. \n
244 Added: functions \ref SCB_GetFPUType, \ref SCB_InvalidateDCache_by_Addr to core_cm7.h. \n
245 Added: register definitions for \ref APSR_Type, \ref IPSR_Type, \ref xPSR_Type register. \n
246 Added: \ref __set_BASEPRI_MAX function to core_cmFunc.h. \n
247 Added: intrinsic functions \ref __RBIT, \ref __CLZ for Cortex-M0/CortexM0+. \n
253 Added: Cortex-M7 support.\n
254 Added: intrinsic functions for \ref __RRX, \ref __LDRBT, \ref __LDRHT, \ref __LDRT, \ref __STRBT, \ref __STRHT, and \ref __STRT \n
259 <td>Corrected: C++ include guard settings.\n</td>
264 Added: COSMIC tool chain support.\n
265 Corrected: GCC __SMLALDX instruction intrinsic for Cortex-M4.\n
266 Corrected: GCC __SMLALD instruction intrinsic for Cortex-M4.\n
267 Corrected: GCC/CLang warnings.\n
273 Added: \ref __BKPT instruction intrinsic.\n
274 Added: \ref __SMMLA instruction intrinsic for Cortex-M4.\n
275 Corrected: \ref ITM_SendChar.\n
276 Corrected: \ref __enable_irq, \ref __disable_irq and inline assembly for GCC Compiler.\n
277 Corrected: \ref NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. \n
278 Corrected: rework of in-line assembly functions to remove potential compiler warnings.\n
283 <td>Added support for Cortex-M0+ processor.\n</td>
288 Added support for GNU GCC ARM Embedded Compiler. \n
289 Added function \ref __ROR.\n
290 Added \ref regMap_pg for TPIU, DWT. \n
291 Added support for \ref core_config_sect "SC000 and SC300 processors".\n
292 Corrected \ref ITM_SendChar function. \n
293 Corrected the functions \ref __STREXB, \ref __STREXH, \ref __STREXW for the GNU GCC compiler section. \n
294 Documentation restructured.
300 Updated documentation.\n
301 Updated CMSIS core include files.\n
302 Changed CMSIS/Device folder structure.\n
303 Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library.\n
304 Reworked CMSIS DSP library examples.
309 <td>Added support for Cortex-M4 processor.</td>
314 Reworked Startup Concept.\n
315 Added additional Debug Functionality.\n
316 Changed folder structure.\n
317 Added doxygen comments.\n
318 Added definitions for bit.
323 <td>Added support for Cortex-M0 processor.</td>
327 <td>Added intrinsic functions for \ref __LDREXB, \ref __LDREXH, \ref __LDREXW, \ref __STREXB, \ref __STREXH, \ref __STREXW, and \ref __CLREX</td>
331 <td>Initial Release for Cortex-M3 processor.</td>