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 Removed using get/set built-ins FPSCR in GCC >= 7.2 due to shortcomings.\n
89 Added __NO_RETURN to __NVIC_SystemReset() to silence compiler warnings.\n
90 Added support for Cortex-M1 (beta). \n
91 Removed usage of register keyword. \n
92 Added defines for EXC_RETURN, FNC_RETURN and integrity signature values. \n
93 Enhanced MPUv7 API with defines for memory access attributes.\n
99 Aligned MSPLIM and PSPLIM access functions along supported compilers.\n
105 Added MPU Functions for ARMv8-M for Cortex-M23/M33.\n
106 Moved __SSAT and __USAT intrinsics to CMSIS-Core.\n
107 Aligned __REV, __REV16 and __REVSH intrinsics along supported compilers.\n
113 Added macros \ref \__UNALIGNED_UINT16_READ, \ref \__UNALIGNED_UINT16_WRITE.\n
114 Added macros \ref \__UNALIGNED_UINT32_READ, \ref \__UNALIGNED_UINT32_WRITE.\n
115 Deprecated macro \ref \__UNALIGNED_UINT32.\n
116 Changed \ref version_control_gr macros to be core agnostic. \n
117 Added \ref mpu_functions for Cortex-M0+/M3/M4/M7.
123 Added: macro \ref \__PACKED_STRUCT. \n
124 Added: uVisor support. \n
130 Added: Cortex-M23, Cortex-M33 support.\n
131 Added: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
132 Replaced: macro __SAU_PRESENT with __SAU_REGION_PRESENT. \n
133 Reworked: SAU register and functions. \n
134 Added: macro \ref \__ALIGNED. \n
135 Updated: function \ref SCB_EnableICache. \n
136 Added: cmsis_compiler.h with compiler specific CMSIS macros, functions, instructions. \n
137 Added: macro \ref \__PACKED. \n
138 Updated: compiler specific include files. \n
139 Updated: core dependant include files. \n
140 Removed: deprecated files core_cmfunc.h, core_cminstr.h, core_cmsimd.h.
144 <td>V5.00<br>Beta 6</td>
146 Added: SCB_CFSR register bit definitions. \n
147 Added: function \ref NVIC_GetEnableIRQ. \n
148 Updated: core instruction macros \ref \__NOP, \ref \__WFI, \ref \__WFE, \ref \__SEV for toolchain GCC.
152 <td>V5.00<br>Beta 5</td>
154 Moved: DSP libraries from CMSIS/DSP/Lib to CMSIS/Lib. \n
155 Added: DSP libraries build projects to CMSIS pack.
159 <td>V5.00<br>Beta 4</td>
161 Updated: ARMv8M device files. \n
162 Corrected: ARMv8MBL interrupts. \n
163 Reworked: NVIC functions.
167 <td>V5.00<br>Beta 2</td>
169 Changed: ARMv8M SAU regions to 8. \n
170 Changed: moved function \ref TZ_SAU_Setup to file partition_<device>.h. \n
171 Changed: license under Apache-2.0. \n
172 Added: check if macro is defined before use. \n
173 Corrected: function \ref SCB_DisableDCache. \n
174 Corrected: macros \ref \_VAL2FLD, \ref \_FLD2VAL. \n
175 Added: NVIC function virtualization with macros \ref CMSIS_NVIC_VIRTUAL and \ref CMSIS_VECTAB_VIRTUAL.
179 <td>V5.00<br>Beta 1</td>
181 Renamed: cmsis_armcc_V6.h to cmsis_armclang.h.\n
182 Renamed: core\_*.h to lower case.\n
183 Added: function \ref SCB_GetFPUType to all CMSIS cores.\n
184 Added: ARMv8-M support.
190 Corrected: DoxyGen function parameter comments.\n
191 Corrected: IAR toolchain: removed for \ref NVIC_SystemReset the attribute(noreturn).\n
192 Corrected: GCC toolchain: suppressed irrelevant compiler warnings.\n
193 Added: Support files for Arm Compiler v6 (cmsis_armcc_v6.h).
199 Corrected: MISRA-C:2004 violations. \n
200 Corrected: predefined macro for TI CCS Compiler. \n
201 Corrected: function \ref __SHADD16 in arm_math.h. \n
202 Updated: cache functions for Cortex-M7. \n
203 Added: macros \ref _VAL2FLD, \ref _FLD2VAL to core\_*.h. \n
204 Updated: functions \ref __QASX, \ref __QSAX, \ref __SHASX, \ref __SHSAX. \n
205 Corrected: potential bug in function \ref __SHADD16.
211 Corrected: MISRA-C:2004 violations. \n
212 Corrected: intrinsic functions \ref __DSB, \ref __DMB, \ref __ISB. \n
213 Corrected: register definitions for ITCMCR register. \n
214 Corrected: register definitions for \ref CONTROL_Type register. \n
215 Added: functions \ref SCB_GetFPUType, \ref SCB_InvalidateDCache_by_Addr to core_cm7.h. \n
216 Added: register definitions for \ref APSR_Type, \ref IPSR_Type, \ref xPSR_Type register. \n
217 Added: \ref __set_BASEPRI_MAX function to core_cmFunc.h. \n
218 Added: intrinsic functions \ref __RBIT, \ref __CLZ for Cortex-M0/CortexM0+. \n
224 Added: Cortex-M7 support.\n
225 Added: intrinsic functions for \ref __RRX, \ref __LDRBT, \ref __LDRHT, \ref __LDRT, \ref __STRBT, \ref __STRHT, and \ref __STRT \n
230 <td>Corrected: C++ include guard settings.\n</td>
235 Added: COSMIC tool chain support.\n
236 Corrected: GCC __SMLALDX instruction intrinsic for Cortex-M4.\n
237 Corrected: GCC __SMLALD instruction intrinsic for Cortex-M4.\n
238 Corrected: GCC/CLang warnings.\n
244 Added: \ref __BKPT instruction intrinsic.\n
245 Added: \ref __SMMLA instruction intrinsic for Cortex-M4.\n
246 Corrected: \ref ITM_SendChar.\n
247 Corrected: \ref __enable_irq, \ref __disable_irq and inline assembly for GCC Compiler.\n
248 Corrected: \ref NVIC_GetPriority and VTOR_TBLOFF for Cortex-M0/M0+, SC000. \n
249 Corrected: rework of in-line assembly functions to remove potential compiler warnings.\n
254 <td>Added support for Cortex-M0+ processor.\n</td>
259 Added support for GNU GCC ARM Embedded Compiler. \n
260 Added function \ref __ROR.\n
261 Added \ref regMap_pg for TPIU, DWT. \n
262 Added support for \ref core_config_sect "SC000 and SC300 processors".\n
263 Corrected \ref ITM_SendChar function. \n
264 Corrected the functions \ref __STREXB, \ref __STREXH, \ref __STREXW for the GNU GCC compiler section. \n
265 Documentation restructured.
271 Updated documentation.\n
272 Updated CMSIS core include files.\n
273 Changed CMSIS/Device folder structure.\n
274 Added support for Cortex-M0, Cortex-M4 w/o FPU to CMSIS DSP library.\n
275 Reworked CMSIS DSP library examples.
280 <td>Added support for Cortex-M4 processor.</td>
285 Reworked Startup Concept.\n
286 Added additional Debug Functionality.\n
287 Changed folder structure.\n
288 Added doxygen comments.\n
289 Added definitions for bit.
294 <td>Added support for Cortex-M0 processor.</td>
298 <td>Added intrinsic functions for \ref __LDREXB, \ref __LDREXH, \ref __LDREXW, \ref __STREXB, \ref __STREXH, \ref __STREXW, and \ref __CLREX</td>
302 <td>Initial Release for Cortex-M3 processor.</td>