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Adaptation/GUID-7E3BBB18-3113-4312-AD91-897DE87C58BF.dita
author Graeme Price <GRAEME.PRICE@NOKIA.COM>
Fri, 15 Oct 2010 14:32:18 +0100
changeset 15 307f4279f433
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License
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"Eclipse Public License v1.0" which accompanies this distribution,
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors:
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-7E3BBB18-3113-4312-AD91-897DE87C58BF" xml:lang="en"><title>SDIO
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PSU Implementation Tutorial</title><shortdesc>How to implement the platform-specific class for the Power Supply
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Unit of an SDIO-based hardware component.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>The Power Supply Unit (PSU) functionality is provided by the <xref href="GUID-9BF2FEAC-F6B8-3071-A4AB-976E33354F1D.dita"><apiname>DSDIOPsu</apiname></xref> class.
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To enable power control in the SDIO Controller, you must implement the <codeph>PsuInfo()</codeph> function
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in the derived class of the <xref href="GUID-9BF2FEAC-F6B8-3071-A4AB-976E33354F1D.dita"><apiname>DSDIOPsu</apiname></xref> class. </p>
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<p>The <codeph>iNotLockedTimeOut</codeph> variable
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is used by the "card not locked" functionality and the value is tied to the
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reference board inactivity time-out. The <codeph>iInactivityTimeOut</codeph> variable
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is used to set a time-out value for the sleep mode of the SDIO cards. </p>
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<example><p><codeblock xml:space="preserve">void DMySdioPsu::PsuInfo(TPBusPsuInfo&amp; anInfo)
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	{
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	...
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	// Only for SDIO
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	anInfo.iNotLockedTimeOut = 5;    // Power down after 5 seconds of non-use (no clients registered)
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	anInfo.iInactivityTimeOut = 1;	// Enter Sleep mode within 1 Second of inactivity (clients registered)
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	...
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	return;
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	}
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</codeblock></p></example>
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</conbody></concept>
MCL/sftools/depl/docscontent