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 Added: Cortex-M35P support.\n
103 Added: Cortex-M1 support.\n
104 Added: Armv8.1 architecture support.\n
105 Added: \ref __RESTRICT and \ref __STATIC_FORCEINLINE compiler control macros.
111 Removed using get/set built-ins FPSCR in GCC >= 7.2 due to shortcomings.\n
112 Added __NO_RETURN to __NVIC_SystemReset() to silence compiler warnings.\n
113 Added support for Cortex-M1 (beta). \n
114 Removed usage of register keyword. \n
115 Added defines for EXC_RETURN, FNC_RETURN and integrity signature values. \n
116 Enhanced MPUv7 API with defines for memory access attributes.
122 Aligned MSPLIM and PSPLIM access functions along supported compilers.
128 Added MPU Functions for ARMv8-M for Cortex-M23/M33.\n
129 Moved __SSAT and __USAT intrinsics to CMSIS-Core.\n
130 Aligned __REV, __REV16 and __REVSH intrinsics along supported compilers.
136 Added macros \ref \__UNALIGNED_UINT16_READ, \ref \__UNALIGNED_UINT16_WRITE.\n
137 Added macros \ref \__UNALIGNED_UINT32_READ, \ref \__UNALIGNED_UINT32_WRITE.\n
138 Deprecated macro \ref \__UNALIGNED_UINT32.\n
139 Changed \ref version_control_gr macros to be core agnostic. \n
140 Added \ref mpu_functions for Cortex-M0+/M3/M4/M7.
146 Added: macro \ref \__PACKED_STRUCT. \n
147 Added: uVisor support. \n
153 Added: Cortex-M23, Cortex-M33 support.\n
154 Added: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
155 Replaced: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
156 Reworked: SAU register and functions. \n
157 Added: macro \ref \__ALIGNED. \n
158 Updated: function \ref SCB_EnableICache. \n
159 Added: cmsis_compiler.h with compiler specific CMSIS macros, functions, instructions. \n
160 Added: macro \ref \__PACKED. \n
161 Updated: compiler specific include files. \n
162 Updated: core dependant include files. \n
163 Removed: deprecated files core_cmfunc.h, core_cminstr.h, core_cmsimd.h.
167 <td>V5.00<br>Beta 6</td>
169 Added: SCB_CFSR register bit definitions. \n
170 Added: function \ref NVIC_GetEnableIRQ. \n
171 Updated: core instruction macros \ref \__NOP, \ref \__WFI, \ref \__WFE, \ref \__SEV for toolchain GCC.
175 <td>V5.00<br>Beta 5</td>
177 Moved: DSP libraries from CMSIS/DSP/Lib to CMSIS/Lib. \n
178 Added: DSP libraries build projects to CMSIS pack.
182 <td>V5.00<br>Beta 4</td>
184 Updated: ARMv8M device files. \n
185 Corrected: ARMv8MBL interrupts. \n
186 Reworked: NVIC functions.
190 <td>V5.00<br>Beta 2</td>
192 Changed: ARMv8M SAU regions to 8. \n
193 Changed: moved function \ref TZ_SAU_Setup to file partition_<device>.h. \n
194 Changed: license under Apache-2.0. \n
195 Added: check if macro is defined before use. \n
196 Corrected: function \ref SCB_DisableDCache. \n
197 Corrected: macros \ref \_VAL2FLD, \ref \_FLD2VAL. \n
198 Added: NVIC function virtualization with macros \ref CMSIS_NVIC_VIRTUAL and \ref CMSIS_VECTAB_VIRTUAL.
202 <td>V5.00<br>Beta 1</td>
204 Renamed: cmsis_armcc_V6.h to cmsis_armclang.h.\n
205 Renamed: core\_*.h to lower case.\n
206 Added: function \ref SCB_GetFPUType to all CMSIS cores.\n
207 Added: ARMv8-M support.
213 Corrected: DoxyGen function parameter comments.\n
214 Corrected: IAR toolchain: removed for \ref NVIC_SystemReset the attribute(noreturn).\n
215 Corrected: GCC toolchain: suppressed irrelevant compiler warnings.\n
216 Added: Support files for Arm Compiler v6 (cmsis_armcc_v6.h).
222 Corrected: MISRA-C:2004 violations. \n
223 Corrected: predefined macro for TI CCS Compiler. \n
224 Corrected: function \ref __SHADD16 in arm_math.h. \n
225 Updated: cache functions for Cortex-M7. \n
226 Added: macros \ref _VAL2FLD, \ref _FLD2VAL to core\_*.h. \n
227 Updated: functions \ref __QASX, \ref __QSAX, \ref __SHASX, \ref __SHSAX. \n
228 Corrected: potential bug in function \ref __SHADD16.
234 Corrected: MISRA-C:2004 violations. \n
235 Corrected: intrinsic functions \ref __DSB, \ref __DMB, \ref __ISB. \n
236 Corrected: register definitions for ITCMCR register. \n
237 Corrected: register definitions for \ref CONTROL_Type register. \n
238 Added: functions \ref SCB_GetFPUType, \ref SCB_InvalidateDCache_by_Addr to core_cm7.h. \n
239 Added: register definitions for \ref APSR_Type, \ref IPSR_Type, \ref xPSR_Type register. \n
240 Added: \ref __set_BASEPRI_MAX function to core_cmFunc.h. \n
241 Added: intrinsic functions \ref __RBIT, \ref __CLZ for Cortex-M0/CortexM0+. \n
247 Added: Cortex-M7 support.\n
248 Added: intrinsic functions for \ref __RRX, \ref __LDRBT, \ref __LDRHT, \ref __LDRT, \ref __STRBT, \ref __STRHT, and \ref __STRT \n
253 <td>Corrected: C++ include guard settings.\n</td>
258 Added: COSMIC tool chain support.\n
259 Corrected: GCC __SMLALDX instruction intrinsic for Cortex-M4.\n
260 Corrected: GCC __SMLALD instruction intrinsic for Cortex-M4.\n
261 Corrected: GCC/CLang warnings.\n
267 Added: \ref __BKPT instruction intrinsic.\n
268 Added: \ref __SMMLA instruction intrinsic for Cortex-M4.\n
269 Corrected: \ref ITM_SendChar.\n
270 Corrected: \ref __enable_irq, \ref __disable_irq and inline assembly for GCC Compiler.\n
271 Corrected: \ref NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. \n
272 Corrected: rework of in-line assembly functions to remove potential compiler warnings.\n
277 <td>Added support for Cortex-M0+ processor.\n</td>
282 Added support for GNU GCC ARM Embedded Compiler. \n
283 Added function \ref __ROR.\n
284 Added \ref regMap_pg for TPIU, DWT. \n
285 Added support for \ref core_config_sect "SC000 and SC300 processors".\n
286 Corrected \ref ITM_SendChar function. \n
287 Corrected the functions \ref __STREXB, \ref __STREXH, \ref __STREXW for the GNU GCC compiler section. \n
288 Documentation restructured.
294 Updated documentation.\n
295 Updated CMSIS core include files.\n
296 Changed CMSIS/Device folder structure.\n
297 Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library.\n
298 Reworked CMSIS DSP library examples.
303 <td>Added support for Cortex-M4 processor.</td>
308 Reworked Startup Concept.\n
309 Added additional Debug Functionality.\n
310 Changed folder structure.\n
311 Added doxygen comments.\n
312 Added definitions for bit.
317 <td>Added support for Cortex-M0 processor.</td>
321 <td>Added intrinsic functions for \ref __LDREXB, \ref __LDREXH, \ref __LDREXW, \ref __STREXB, \ref __STREXH, \ref __STREXW, and \ref __CLREX</td>
325 <td>Initial Release for Cortex-M3 processor.</td>