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Refactor of oled driver
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<div id="projectname">CMSIS-SVD
 <span id="projectnumber">Version 1.10</span>
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<div id="projectbrief">CMSIS System View Description</div>
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<p>Register properties can be set on device, peripheral, and register level. Element values defined on a lower level overwrite element values defined on a more general level. For example, the <em>register-level.<size></em> will overwrite <em>peripheral-level.<size></em>. Elements that have not been defined on a more general level, must be defined at register level at the latest.</p>
<table class="cmtable" summary="Register Properties Group Elements">
<tr>
<th nowrap="nowrap">Element Name </th><th>Description </th><th>Type </th><th>Occurrence </th></tr>
<tr>
<td>size </td><td>Defines the default bit-width of any register contained in the device (implicit inheritance). This element can be redefined on any lower level of the description using the size element there. </td><td>scaledNonNegativeInteger </td><td>0..1 </td></tr>
<tr>
<td>access </td><td>Defines the default access rights for all registers. Access rights can be redefined on any lower level of the description using the <em>access</em> element there. <br/>
<br/>
The predefined tokens are:<ul>
<li><span class="XML-Token">read-only</span>: read access is permitted. Write operations have an undefined result.</li>
<li><span class="XML-Token">write-only</span>: write access is permitted. Read operations have an undefined result.</li>
<li><span class="XML-Token">read-write</span>: both read and write accesses are permitted. Writes affect the state of the register and reads return a value related to the register.</li>
<li><span class="XML-Token">writeOnce</span>: only the first write after reset has an effect on the register. Read operations deliver undefined results.</li>
<li><span class="XML-Token">read-writeOnce</span>: Read operations deliver a result related to the register content. Only the first write access to this register after a reset will have an effect on the register content. </li>
</ul>
</td><td>accessType </td><td>0..1 </td></tr>
<tr>
<td>resetValue </td><td>Defines the default value for all registers at RESET. The default register value can be redefined on any lower level using the <em>resetValue</em> element there. The actual reset value is calculated from the <em>resetValue</em> and the <em>resetMask</em>. The mask is used to specify bits with an undefined reset value. </td><td>scaledNonNegativeInteger </td><td>0..1 </td></tr>
<tr>
<td>resetMask </td><td>Identifies which register bits have a defined reset value. These bit positions are set to one. Bit positions with an undefined reset value are set to zero. </td><td>scaledNonNegativeInteger </td><td>0..1 </td></tr>
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