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.
15 - \ref using_TrustZone_pg "Using TrustZone® for Armv8-M" describes how to use the security extensions available in the Armv8-M architecture.
16 - \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.
17 - \ref coreMISRA_Exceptions_pg describes the violations to the MISRA standard.
18 - <a href="Modules.html">\b Reference </a> describe the features and functions of the \ref device_h_pg in detail.
19 - <a href="Annotated.html">\b Data \b Structures </a> describe the data structures of the \ref device_h_pg in detail.
23 CMSIS-Core (Cortex-M) in ARM::CMSIS Pack
24 -----------------------------
26 Files relevant to CMSIS-Core (Cortex-M) are present in the following <b>ARM::CMSIS</b> directories:
27 |File/Folder |Content |
28 |------------------------------|------------------------------------------------------------------------|
29 |\b CMSIS\\Documentation\\Core | This documentation |
30 |\b CMSIS\\Core\\Include | CMSIS-Core (Cortex-M) header files (for example core_cm3.h, core_cmInstr.h, etc.) |
31 |\b Device | \ref using_ARM_pg "Arm reference implementations" of Cortex-M devices |
32 |\b Device\\\_Template_Vendor | \ref templates_pg for extension by silicon vendors |
36 \section ref_v6-v8M Processor Support
38 CMSIS supports the complete range of <a href="http://www.arm.com/products/processors/cortex-m/index.php" target="_blank"><b>Cortex-M processors</b></a> (with exception of Cortex-M1) and
39 the <a href="http://www.arm.com/products/processors/instruction-set-architectures/armv8-m-architecture.php" target="_blank"><b>Armv8-M architecture</b></a> including security extensions.
41 \subsection ref_man_sec Cortex-M Reference Manuals
43 The Cortex-M Device Generic User Guides contain the programmers model and detailed information about the core peripherals and are available for:
45 - <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)
46 - <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)
47 - <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)
48 - <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)
49 - <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)
51 The \b Cortex-M23 and \b Cortex-M33 are described with Technical Reference Manuals that are available here:
52 - <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)
53 - <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)
55 \subsection ARMv8M Armv8-M Architecture
57 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).
58 Both Armv8-M profiles are supported by CMSIS.
60 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>.
64 \section tested_tools_sec Tested and Verified Toolchains
66 The \ref templates_pg supplied by Arm have been tested and verified with the following toolchains:
67 - Arm: Arm Compiler 5.06 update 6 (not for Cortex-M23, Cortex-M33, Armv8-M)
68 - Arm: Arm Compiler 6.9
69 - Arm: Arm Compiler 6.6.2 (not for Cortex-M0, Cortex-M23, Cortex-M33, Armv8-M)
70 - GNU: GNU Tools for Arm Embedded 6.3.1 20170620
71 - IAR: IAR ANSI C/C++ Compiler for Arm 8.20.1.14183
75 /*=======0=========1=========2=========3=========4=========5=========6=========7=========8=========9=========0=========1====*/
78 \page core_revisionHistory Revision History of CMSIS-Core (Cortex-M)
80 <table class="cmtable" summary="Revision History">
88 Added: Cortex-M35P support.\n
94 Removed using get/set built-ins FPSCR in GCC >= 7.2 due to shortcomings.\n
95 Added __NO_RETURN to __NVIC_SystemReset() to silence compiler warnings.\n
96 Added support for Cortex-M1 (beta). \n
97 Removed usage of register keyword. \n
98 Added defines for EXC_RETURN, FNC_RETURN and integrity signature values. \n
99 Enhanced MPUv7 API with defines for memory access attributes.\n
105 Aligned MSPLIM and PSPLIM access functions along supported compilers.\n
111 Added MPU Functions for ARMv8-M for Cortex-M23/M33.\n
112 Moved __SSAT and __USAT intrinsics to CMSIS-Core.\n
113 Aligned __REV, __REV16 and __REVSH intrinsics along supported compilers.\n
119 Added macros \ref \__UNALIGNED_UINT16_READ, \ref \__UNALIGNED_UINT16_WRITE.\n
120 Added macros \ref \__UNALIGNED_UINT32_READ, \ref \__UNALIGNED_UINT32_WRITE.\n
121 Deprecated macro \ref \__UNALIGNED_UINT32.\n
122 Changed \ref version_control_gr macros to be core agnostic. \n
123 Added \ref mpu_functions for Cortex-M0+/M3/M4/M7.
129 Added: macro \ref \__PACKED_STRUCT. \n
130 Added: uVisor support. \n
136 Added: Cortex-M23, Cortex-M33 support.\n
137 Added: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
138 Replaced: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
139 Reworked: SAU register and functions. \n
140 Added: macro \ref \__ALIGNED. \n
141 Updated: function \ref SCB_EnableICache. \n
142 Added: cmsis_compiler.h with compiler specific CMSIS macros, functions, instructions. \n
143 Added: macro \ref \__PACKED. \n
144 Updated: compiler specific include files. \n
145 Updated: core dependant include files. \n
146 Removed: deprecated files core_cmfunc.h, core_cminstr.h, core_cmsimd.h.
150 <td>V5.00<br>Beta 6</td>
152 Added: SCB_CFSR register bit definitions. \n
153 Added: function \ref NVIC_GetEnableIRQ. \n
154 Updated: core instruction macros \ref \__NOP, \ref \__WFI, \ref \__WFE, \ref \__SEV for toolchain GCC.
158 <td>V5.00<br>Beta 5</td>
160 Moved: DSP libraries from CMSIS/DSP/Lib to CMSIS/Lib. \n
161 Added: DSP libraries build projects to CMSIS pack.
165 <td>V5.00<br>Beta 4</td>
167 Updated: ARMv8M device files. \n
168 Corrected: ARMv8MBL interrupts. \n
169 Reworked: NVIC functions.
173 <td>V5.00<br>Beta 2</td>
175 Changed: ARMv8M SAU regions to 8. \n
176 Changed: moved function \ref TZ_SAU_Setup to file partition_<device>.h. \n
177 Changed: license under Apache-2.0. \n
178 Added: check if macro is defined before use. \n
179 Corrected: function \ref SCB_DisableDCache. \n
180 Corrected: macros \ref \_VAL2FLD, \ref \_FLD2VAL. \n
181 Added: NVIC function virtualization with macros \ref CMSIS_NVIC_VIRTUAL and \ref CMSIS_VECTAB_VIRTUAL.
185 <td>V5.00<br>Beta 1</td>
187 Renamed: cmsis_armcc_V6.h to cmsis_armclang.h.\n
188 Renamed: core\_*.h to lower case.\n
189 Added: function \ref SCB_GetFPUType to all CMSIS cores.\n
190 Added: ARMv8-M support.
196 Corrected: DoxyGen function parameter comments.\n
197 Corrected: IAR toolchain: removed for \ref NVIC_SystemReset the attribute(noreturn).\n
198 Corrected: GCC toolchain: suppressed irrelevant compiler warnings.\n
199 Added: Support files for Arm Compiler v6 (cmsis_armcc_v6.h).
205 Corrected: MISRA-C:2004 violations. \n
206 Corrected: predefined macro for TI CCS Compiler. \n
207 Corrected: function \ref __SHADD16 in arm_math.h. \n
208 Updated: cache functions for Cortex-M7. \n
209 Added: macros \ref _VAL2FLD, \ref _FLD2VAL to core\_*.h. \n
210 Updated: functions \ref __QASX, \ref __QSAX, \ref __SHASX, \ref __SHSAX. \n
211 Corrected: potential bug in function \ref __SHADD16.
217 Corrected: MISRA-C:2004 violations. \n
218 Corrected: intrinsic functions \ref __DSB, \ref __DMB, \ref __ISB. \n
219 Corrected: register definitions for ITCMCR register. \n
220 Corrected: register definitions for \ref CONTROL_Type register. \n
221 Added: functions \ref SCB_GetFPUType, \ref SCB_InvalidateDCache_by_Addr to core_cm7.h. \n
222 Added: register definitions for \ref APSR_Type, \ref IPSR_Type, \ref xPSR_Type register. \n
223 Added: \ref __set_BASEPRI_MAX function to core_cmFunc.h. \n
224 Added: intrinsic functions \ref __RBIT, \ref __CLZ for Cortex-M0/CortexM0+. \n
230 Added: Cortex-M7 support.\n
231 Added: intrinsic functions for \ref __RRX, \ref __LDRBT, \ref __LDRHT, \ref __LDRT, \ref __STRBT, \ref __STRHT, and \ref __STRT \n
236 <td>Corrected: C++ include guard settings.\n</td>
241 Added: COSMIC tool chain support.\n
242 Corrected: GCC __SMLALDX instruction intrinsic for Cortex-M4.\n
243 Corrected: GCC __SMLALD instruction intrinsic for Cortex-M4.\n
244 Corrected: GCC/CLang warnings.\n
250 Added: \ref __BKPT instruction intrinsic.\n
251 Added: \ref __SMMLA instruction intrinsic for Cortex-M4.\n
252 Corrected: \ref ITM_SendChar.\n
253 Corrected: \ref __enable_irq, \ref __disable_irq and inline assembly for GCC Compiler.\n
254 Corrected: \ref NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. \n
255 Corrected: rework of in-line assembly functions to remove potential compiler warnings.\n
260 <td>Added support for Cortex-M0+ processor.\n</td>
265 Added support for GNU GCC ARM Embedded Compiler. \n
266 Added function \ref __ROR.\n
267 Added \ref regMap_pg for TPIU, DWT. \n
268 Added support for \ref core_config_sect "SC000 and SC300 processors".\n
269 Corrected \ref ITM_SendChar function. \n
270 Corrected the functions \ref __STREXB, \ref __STREXH, \ref __STREXW for the GNU GCC compiler section. \n
271 Documentation restructured.
277 Updated documentation.\n
278 Updated CMSIS core include files.\n
279 Changed CMSIS/Device folder structure.\n
280 Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library.\n
281 Reworked CMSIS DSP library examples.
286 <td>Added support for Cortex-M4 processor.</td>
291 Reworked Startup Concept.\n
292 Added additional Debug Functionality.\n
293 Changed folder structure.\n
294 Added doxygen comments.\n
295 Added definitions for bit.
300 <td>Added support for Cortex-M0 processor.</td>
304 <td>Added intrinsic functions for \ref __LDREXB, \ref __LDREXH, \ref __LDREXW, \ref __STREXB, \ref __STREXH, \ref __STREXW, and \ref __CLREX</td>
308 <td>Initial Release for Cortex-M3 processor.</td>