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<title>CMSIS-CORE: Overview</title>
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<div id="projectname">CMSIS-CORE
 <span id="projectnumber">Version 4.30</span>
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<div id="projectbrief">CMSIS-CORE support for Cortex-M processor-based devices</div>
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<div class="title">Overview </div> </div>
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<div class="textblock"><p>CMSIS-CORE implements the basic run-time system for a Cortex-M device and gives the user access to the processor core and the device peripherals. In detail it defines:</p>
<ul>
<li><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.</li>
<li><b>System exception names</b> to interface to system exceptions without having compatibility issues.</li>
<li><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.</li>
<li><b>Methods for system initialization</b> to be used by each MCU vendor. For example, the standardized <a class="el" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2" title="Function to Initialize the system.">SystemInit()</a> function is essential for configuring the clock system of the device.</li>
<li><b>Intrinsic functions</b> used to generate CPU instructions that are not supported by standard C functions.</li>
<li>A variable to determine the <b>system clock frequency</b> which simplifies the setup the SysTick timer.</li>
</ul>
<p>The following sections provide details about the CMSIS-CORE:</p>
<ul>
<li><a class="el" href="_using_pg.html">Using CMSIS in Embedded Applications</a> describes the project setup and shows a simple program example.</li>
<li><a class="el" href="_templates_pg.html">Template Files</a> describes the files of the CMSIS-CORE in detail and explains how to adapt template files provided by ARM to silicon vendor devices.</li>
<li><a class="el" href="_c_o_r_e__m_i_s_r_a__exceptions_pg.html">MISRA-C:2004 Compliance Exceptions</a> describes the violations to the MISRA standard.</li>
<li><a href="Modules.html"><b>Reference</b> </a> describe the features and functions of the <a class="el" href="device_h_pg.html">Device Header File <device.h></a> in detail.</li>
<li><a href="Annotated.html"><b>Data</b> <b>Structures</b> </a> describe the data structures of the <a class="el" href="device_h_pg.html">Device Header File <device.h></a> in detail.</li>
</ul>
<hr/>
<h2>CMSIS-CORE in ARM::CMSIS Pack</h2>
<p>Files relevant to CMSIS-CORE are present in the following <b>ARM::CMSIS</b> directories: </p>
<table class="doxtable">
<tr>
<th>File/Folder </th><th>Content </th></tr>
<tr>
<td><b>CMSIS\Documentation\Core</b> </td><td>This documentation </td></tr>
<tr>
<td><b>CMSIS\Include</b> </td><td>CMSIS-CORE header files (for example core_cm3.h, core_cmInstr.h, etc.) </td></tr>
<tr>
<td><b>Device</b> </td><td><a class="el" href="_using__a_r_m_pg.html">ARM reference implementations</a> of Cortex-M devices </td></tr>
<tr>
<td><b>Device\_Template_Vendor</b> </td><td><a class="el" href="_templates_pg.html">Template Files</a> for extension by silicon vendors </td></tr>
</table>
<hr/>
<h1><a class="anchor" id="ref_man_sec"></a>
Cortex-M Reference Manuals</h1>
<p>The Cortex-M Reference Manuals are generic user guides for devices that implement the various ARM Cortex-M processors. These manuals contain the programmers model and detailed information about the core peripherals.</p>
<ul>
<li><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></li>
<li><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></li>
<li><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></li>
<li><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></li>
<li><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></li>
</ul>
<hr/>
<h1><a class="anchor" id="tested_tools_sec"></a>
Tested and Verified Toolchains</h1>
<p>The CMSIS-CORE <a class="el" href="_templates_pg.html">Template Files</a> supplied by ARM have been tested and verified with the following toolchains:</p>
<ul>
<li>ARM: MDK-ARM Version 5.16</li>
<li>GNU: GNU Tools ARM Embedded 4.9 2015.q2</li>
<li>IAR: IAR Embedded Workbench Kickstart Edition V6.10</li>
</ul>
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