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Location: therm/libraries/CMSIS/Documentation/SVD/html/group__cluster_level__gr.html - annotation

Ethan Zonca
Oled driver updates and pin assignment fixes
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   &#160;<span id="projectnumber">Version 1.10</span>
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<div class="title">Cluster Level (New)<div class="ingroups"><a class="el" href="group__svd___format__1__1__gr.html">SVD Extension in Version 1.1</a></div></div>  </div>
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<p><b>Cluster</b> adds a new and optional sub-level to the CMSIS SVD <em>registers</em> level. A cluster describes a sequence of registers within a peripheral. A cluster has an base offset relative to the base address of the peripheral. All registers within a cluster specify their address offset relative to the cluster base address. <em>Register</em> and <em>cluster</em> sections can occur in an arbitrary order. This feature, targeted at the generation of device header files, is useful to create a C data structure within the peripheral structure type, rather than describing all registers of a peripheral in a flat structure.</p>
<hr/>
<pre>
<span class="mand"><b>&lt;registers&gt;</b> </span></pre><pre><span class="mand">    <b>&lt;cluster <span class="opt">derivedFrom=<em>identifierType</em></span>&gt;</b>
    <span class="opt">
        <em>&lt;!-- dimElementGroup --&gt; </em>
        &lt;dim&gt;<em>scaledNonNegativeInteger</em>&lt;/dim&gt;
        &lt;dimIncrement&gt;<em>scaledNonNegativeInteger</em>&lt;/dimIncrement&gt;
        &lt;dimIndex&gt;<em>dimIndexType</em>&lt;/dimIndex&gt;
        <em>&lt;!-- end of dimElementGroup --&gt; </em>
    </span>
        &lt;name&gt;<em>identifierType</em>&lt;/name&gt;
        &lt;description&gt;<em>xs:string</em>&lt;/description&gt;
    <span class="opt">
        &lt;headerStructName&gt;<em>identifierType</em>&lt;/headerStructName&gt;
        &lt;alternateCluster&gt;<em>identifierType</em>&lt;/alternateCluster&gt;
    </span>
        &lt;addressOffset&gt;<em>scaledNonNegativeInteger</em>&lt;/addressOffset&gt;</span></pre><pre><span class="mand">        &lt;register&gt;
            ...
        &lt;/register&gt;
    <b>&lt;/cluster&gt;</b>
    <span class="opt">...
    &lt;register&gt;
        ...
    &lt;/register&gt;
    &lt;cluster&gt;
        ...
    &lt;/cluster&gt;
     </span>
<b>&lt;registers&gt;</b> </span>
</pre><table  class="cmtable" summary="Cluster Level Schema">
<tr>
<th>Attribute Name </th><th>Description </th><th>Type </th><th>Occurrence  </th></tr>
<tr>
<td>derivedFrom </td><td>Specifies the name of the cluster from which to inherit the data. Elements being specified underneath will override the inherited values. <br/>
<b>Remarks:</b> When deriving a cluster, it is mandatory to specify at least the name, the description, and the addressOffset. </td><td>registerType </td><td>0..1  </td></tr>
<tr>
<th>Element Name </th><th>Description </th><th>Type </th><th>Occurrence  </th></tr>
<tr class="group1">
<td colspan="4">See <a class="el" href="group__dim_element_group__gr.html">dimElementGroup</a> for details.  </td></tr>
<tr class="group1">
<td align="left">dimIncrement </td><td>The value defines the number of elements in an array of clusters.  </td><td>scaledNonNegativeInteger  </td><td>1..1   </td></tr>
<tr class="group1">
<td align="left">dimIncrement </td><td>If <em>dim</em> is specified, this element becomes mandatory. The element specifies the address increment in between two neighboring clusters of the cluster array in the address map. </td><td>scaledNonNegativeInteger  </td><td>1..1   </td></tr>
<tr class="group1">
<td align="left">dimIndex </td><td>Specifies the substrings that replaces the <em>[%s]</em> placeholder within the cluster name. By default, the index is a decimal value starting with 0 for the first cluster element.  </td><td>dimIndexType  </td><td>0..1   </td></tr>
<tr>
<td>name </td><td>String that identifies the cluster. Register names are required to be unique within the scope of a peripheral. Specify <em>[%s]</em> for generating an array in the device header file. </td><td>identifierType  </td><td>1..1   </td></tr>
<tr>
<td>description </td><td>String describing the details of the register. </td><td>xs:string  </td><td>0..1   </td></tr>
<tr>
<td>alternateCluster  </td><td>This tag needs to specify the name of the original description of the register sequence if this cluster provides an alternative description. Otherwise the SVDConv will issue errors. </td><td>identifierType </td><td>0..1   </td></tr>
<tr>
<td>headerStructName  </td><td>This tag specifies the struct type name in the device header file. If not specified, then the name of the cluster will be used. </td><td>identifierType </td><td>0..1   </td></tr>
<tr>
<td>addressOffset </td><td>Value defining the cluster address relative to the <em>baseAddress</em> defined by the peripheral of the register. </td><td>scaledNonNegativeInteger </td><td>1..1   </td></tr>
</table>
<h1><a class="anchor" id="clusterSection_ex"></a>
Example:</h1>
<div class="fragment"><div class="line">&lt;cluster&gt;</div>
<div class="line">    &lt;dim&gt;4&lt;/dim&gt;</div>
<div class="line">        &lt;dimIncrement&gt;8&lt;/dimIncrement&gt;</div>
<div class="line">        &lt;dimIndex&gt;0-3&lt;/dimIndex&gt;</div>
<div class="line">    &lt;name&gt;TX[%s]&lt;/name&gt;</div>
<div class="line">    &lt;description&gt;Grouping of Transfer data and address&lt;/description&gt;</div>
<div class="line">    &lt;addressOffset&gt;0x40&lt;/addressOffset&gt;</div>
<div class="line">    &lt;<span class="keyword">register</span>&gt;</div>
<div class="line">            &lt;name&gt;TX_DATA&lt;/name&gt;</div>
<div class="line">        ...</div>
<div class="line">            &lt;addressOffset&gt;0x0&lt;/addressOffset&gt;</div>
<div class="line">        ...</div>
<div class="line">    &lt;/<span class="keyword">register</span>&gt;</div>
<div class="line">    &lt;<span class="keyword">register</span>&gt;</div>
<div class="line">            &lt;name&gt;TX_ADDR&lt;/name&gt;</div>
<div class="line">        ...</div>
<div class="line">            &lt;addressOffset&gt;0x4&lt;/addressOffset&gt;</div>
<div class="line">        ...</div>
<div class="line">    &lt;/<span class="keyword">register</span>&gt;</div>
<div class="line">&lt;/cluster&gt;</div>
</div><!-- fragment --><p>The example above describes an array of type TX with 4 elements. TX is a cluster of two consecutive registers with 4 elements. The device header file looks like this:</p>
<div class="fragment"><div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{</div>
<div class="line">    ...</div>
<div class="line">    <span class="keyword">struct </span>{</div>
<div class="line">       __IO uint32_t  TX_DATA;</div>
<div class="line">       __IO uint32_t  TX_ADDR;</div>
<div class="line">    } TX[4];</div>
<div class="line">    ...</div>
<div class="line">} ..._Type;</div>
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