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<div id="projectname">CMSIS-DSP
 <span id="projectnumber">Version 1.4.7</span>
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<div id="projectbrief">CMSIS DSP Software Library</div>
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<div class="title">CMSIS DSP Software Library </div> </div>
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<div class="textblock"><h2>Introduction</h2>
<p>This user manual describes the CMSIS DSP software library, a suite of common signal processing functions for use on Cortex-M processor based devices.</p>
<p>The library is divided into a number of functions each covering a specific category:</p>
<ul>
<li>Basic math functions</li>
<li>Fast math functions</li>
<li>Complex math functions</li>
<li>Filters</li>
<li>Matrix functions</li>
<li>Transforms</li>
<li>Motor control functions</li>
<li>Statistical functions</li>
<li>Support functions</li>
<li>Interpolation functions</li>
</ul>
<p>The library has separate functions for operating on 8-bit integers, 16-bit integers, 32-bit integer and 32-bit floating-point values.</p>
<h2>Using the Library</h2>
<p>The library installer contains prebuilt versions of the libraries in the <code>Lib</code> folder.</p>
<ul>
<li>arm_cortexM7lfdp_math.lib (Little endian and Double Precision Floating Point Unit on Cortex-M7)</li>
<li>arm_cortexM7bfdp_math.lib (Big endian and Double Precision Floating Point Unit on Cortex-M7)</li>
<li>arm_cortexM7lfsp_math.lib (Little endian and Single Precision Floating Point Unit on Cortex-M7)</li>
<li>arm_cortexM7bfsp_math.lib (Big endian and Single Precision Floating Point Unit on Cortex-M7)</li>
<li>arm_cortexM7l_math.lib (Little endian on Cortex-M7)</li>
<li>arm_cortexM7b_math.lib (Big endian on Cortex-M7)</li>
<li>arm_cortexM4lf_math.lib (Little endian and Floating Point Unit on Cortex-M4)</li>
<li>arm_cortexM4bf_math.lib (Big endian and Floating Point Unit on Cortex-M4)</li>
<li>arm_cortexM4l_math.lib (Little endian on Cortex-M4)</li>
<li>arm_cortexM4b_math.lib (Big endian on Cortex-M4)</li>
<li>arm_cortexM3l_math.lib (Little endian on Cortex-M3)</li>
<li>arm_cortexM3b_math.lib (Big endian on Cortex-M3)</li>
<li>arm_cortexM0l_math.lib (Little endian on Cortex-M0 / CortexM0+)</li>
<li>arm_cortexM0b_math.lib (Big endian on Cortex-M0 / CortexM0+)</li>
</ul>
<p>The library functions are declared in the public file <code><a class="el" href="arm__math_8h.html">arm_math.h</a></code> which is placed in the <code>Include</code> folder. Simply include this file and link the appropriate library in the application and begin calling the library functions. The Library supports single public header file <code> <a class="el" href="arm__math_8h.html">arm_math.h</a></code> for Cortex-M7/M4/M3/M0/M0+ with little endian and big endian. Same header file will be used for floating point unit(FPU) variants. Define the appropriate pre processor MACRO ARM_MATH_CM7 or ARM_MATH_CM4 or ARM_MATH_CM3 or ARM_MATH_CM0 or ARM_MATH_CM0PLUS depending on the target processor in the application.</p>
<h2>Examples</h2>
<p>The library ships with a number of examples which demonstrate how to use the library functions.</p>
<h2>Toolchain Support</h2>
<p>The library has been developed and tested with MDK-ARM version 5.14.0.0 The library is being tested in GCC and IAR toolchains and updates on this activity will be made available shortly.</p>
<h2>Building the Library</h2>
<p>The library installer contains a project file to re build libraries on MDK-ARM Tool chain in the <code>CMSIS\DSP_Lib\Source\ARM</code> folder.</p>
<ul>
<li>arm_cortexM_math.uvprojx</li>
</ul>
<p>The libraries can be built by opening the arm_cortexM_math.uvprojx project in MDK-ARM, selecting a specific target, and defining the optional pre processor MACROs detailed above.</p>
<h2>Pre-processor Macros</h2>
<p>Each library project have differant pre-processor macros.</p>
<ul>
<li>UNALIGNED_SUPPORT_DISABLE:</li>
</ul>
<p>Define macro UNALIGNED_SUPPORT_DISABLE, If the silicon does not support unaligned memory access</p>
<ul>
<li>ARM_MATH_BIG_ENDIAN:</li>
</ul>
<p>Define macro ARM_MATH_BIG_ENDIAN to build the library for big endian targets. By default library builds for little endian targets.</p>
<ul>
<li>ARM_MATH_MATRIX_CHECK:</li>
</ul>
<p>Define macro ARM_MATH_MATRIX_CHECK for checking on the input and output sizes of matrices</p>
<ul>
<li>ARM_MATH_ROUNDING:</li>
</ul>
<p>Define macro ARM_MATH_ROUNDING for rounding on support functions</p>
<ul>
<li>ARM_MATH_CMx:</li>
</ul>
<p>Define macro ARM_MATH_CM4 for building the library on Cortex-M4 target, ARM_MATH_CM3 for building library on Cortex-M3 target and ARM_MATH_CM0 for building library on Cortex-M0 target, ARM_MATH_CM0PLUS for building library on Cortex-M0+ target, and ARM_MATH_CM7 for building the library on cortex-M7.</p>
<ul>
<li>__FPU_PRESENT:</li>
</ul>
<p>Initialize macro __FPU_PRESENT = 1 when building on FPU supported Targets. Enable this macro for M4bf and M4lf libraries</p>
<hr/>
<h2>CMSIS-DSP in ARM::CMSIS Pack</h2>
<p>The following files relevant to CMSIS-DSP are present in the <b>ARM::CMSIS</b> Pack directories: </p>
<table class="doxtable">
<tr>
<th>File/Folder </th><th>Content </th></tr>
<tr>
<td><b>CMSIS\Documentation\DSP</b> </td><td>This documentation </td></tr>
<tr>
<td><b>CMSIS\DSP_Lib</b> </td><td>Software license agreement (license.txt) </td></tr>
<tr>
<td><b>CMSIS\DSP_Lib\Examples</b> </td><td>Example projects demonstrating the usage of the library functions </td></tr>
<tr>
<td><b>CMSIS\DSP_Lib\Source</b> </td><td>Source files for rebuilding the library </td></tr>
</table>
<hr/>
<h2>Revision History of CMSIS-DSP</h2>
<p>Please refer to <a class="el" href="_change_log_pg.html">Change Log</a>.</p>
<h2>Copyright Notice</h2>
<p>Copyright (C) 2010-2015 ARM Limited. All rights reserved. </p>
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