begriffs open source - cmsis-driver-validation/blob - docs/html/resource_requirements.html

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   7 <title>CMSIS-Driver Validation: Resource Requirements</title>
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 112 <div class="title">Resource Requirements </div>  </div>
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 115 <div class="textblock"><h1><a class="anchor" id="heap_req"></a>
 116 Heap Memory</h1>
 117 <p>Heap memory is used by the memory allocation functions.<br/>
 118  It is usually configured in the <a href="http://www.keil.com/support/man/docs/gsac/gsac_startupcodecortex.htm" class="el" target="_blank">startup_device.s</a> file located under the <b>Device</b> component class but it can also, in some cases, be configured by a <b>linker script</b> instead.</p>
 119 <p>Some interface test functions allocate additional buffers from the heap memory.</p>
 120 <p>The CMSIS-Driver Validation framework does not impose heap requirements because it does not use heap memory.</p>
 121 <p>Each interface test module has specific requirements for the heap memory, default requirements are listed below:</p>
 122 <table class="doxtable">
 123 <tr>
 124 <th align="center">Interface test module </th><th align="center">Heap memory requirement (in bytes)  </th></tr>
 125 <tr>
 126 <td align="center">CAN </td><td align="center">128 </td></tr>
 127 <tr>
 128 <td align="center">Ethernet </td><td align="center">1024 </td></tr>
 129 <tr>
 130 <td align="center">SPI </td><td align="center">12288 </td></tr>
 131 <tr>
 132 <td align="center">USART </td><td align="center">2048 </td></tr>
 133 </table>
 134 <p>Interface test modules that are not listed in the previous table do not use heap memory.</p>
 135 <p>The system heap memory size must support the largest heap requirement of any used interface test module.<br/>
 136  For example, if SPI driver testing is selected heap memory size should be set to at least 12 kB.</p>
 137 <p>Suggested value for heap memory size is <b>16384</b> bytes.</p>
 138 <dl class="section note"><dt>Note</dt><dd>Each module contains additional settings in related configuration file which are not exposed through Configuration Wizard and impact the heap memory requirement.<br/>
 139  If these values are changed please adjust heap memory size accordingly.</dd></dl>
 140 <h1><a class="anchor" id="rtos2_req"></a>
 141 CMSIS-RTOS2</h1>
 142 <p>The thread requirements need to be reflected in the CMSIS-RTOS2 configuration. Refer to the <a href="http://www.keil.com/pack/doc/cmsis/RTOS2/html/index.html" class="el" target="_blank">CMSIS-RTOS2 Reference</a> for further details.</p>
 143 <p>For <a href="http://www.keil.com/pack/doc/cmsis/RTOS2/html/rtx5_impl.html" class="el" target="_blank">CMSIS-RTOS2 RTX5</a>, thread requirements are configured in the <a href="http://www.keil.com/pack/doc/cmsis/RTOS2/html/config_rtx5.html" class="el" target="_blank">RTX_Config.h</a> file located under the <b>CMSIS</b> component class:</p>
 144 <table class="doxtable">
 145 <tr>
 146 <th align="left">Option </th><th align="center">Value  </th></tr>
 147 <tr>
 148 <td align="left">System Configuration: Global Dynamic Memory size [bytes] (Note 1) </td><td align="center">16384 </td></tr>
 149 <tr>
 150 <td align="left">Thread Configuration: Default Thread Stack size [bytes] </td><td align="center">3072 </td></tr>
 151 </table>
 152 <dl class="section note"><dt>Note</dt><dd>Note 1: This setting is only necessary for WiFi driver testing, for other driver testing value of 4096 bytes is sufficient. </dd></dl>
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