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<!DOCTYPE concept
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<concept id="GUID-535C66C9-8B45-4DF3-8404-8ED03ABB4799-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1" xml:lang="en"><title>TSDIOInterrupt
Class Tutorial</title><shortdesc>Describes the TSDIOInterrupt API class.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
<section id="GUID-26C82435-8FB9-422E-B6D0-302CB1E4B5F5-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-1"><title>Description</title><p>The <xref href="GUID-5A5218D4-E8AD-322F-BE5B-597137623B3F.dita"><apiname>TSDIOInterrupt</apiname></xref> class
provides the client with the ability to enable, disable, bind and unbind to
an SDIO interrupt. There is no Clear() method provided as it is the responsibility
of the client device driver to clear the appropriate interrupt through its <xref href="GUID-CC5352E2-DB21-393F-A7A4-108AA3684460.dita"><apiname>DSDIORegInterface</apiname></xref> class
documented <xref href="GUID-2607CCFA-3D24-4716-A447-74304F861C44.dita">here</xref>.</p><table id="GUID-8047BB14-2519-4421-B6BD-41B078CAC404-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-1-3">
<tgroup cols="2"><colspec colname="col1"/><colspec colname="col2"/>
<tbody>
<row>
<entry><p>Header file</p></entry>
<entry><p><filepath>interrupt.h</filepath></p></entry>
</row>
<row>
<entry><p>Source code file</p></entry>
<entry><p><filepath>interrupt.cpp</filepath></p></entry>
</row>
<row>
<entry><p>Required libraries</p></entry>
<entry><p>epbussdio.lib</p></entry>
</row>
<row>
<entry><p>Class declaration</p></entry>
<entry><p><codeph>class TSDIOInterrupt</codeph></p></entry>
</row>
</tbody>
</tgroup>
</table></section>
<section id="GUID-ACEDEF93-FD3F-4F19-9641-36F4FAC8FE66-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-2"><title>Bind()</title><p>The
function declaration for the <xref href="GUID-8DAB6465-BCDE-35FE-8C31-861C13A34526.dita"><apiname>Bind()</apiname></xref> method is:</p><codeblock xml:space="preserve">IMPORT_C TInt Bind(TSDIOIsr aIsr, TAny* aPtr);</codeblock><p><b>Description</b></p><p>Binds the <xref href="GUID-5E00A59F-9316-3522-B152-EA8F8BC429B3.dita"><apiname>TSDIOIsr</apiname></xref> callback to the function's interrupt.
Once bound, the interrupt should be enabled for the function by a call to
Enable().</p><p><b>Parameters</b></p><p><table id="GUID-8F76FE85-D8EF-4FBF-974F-CB5CD7FF76FB-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-2-7-1">
<tgroup cols="2"><colspec colname="col1"/><colspec colname="col2"/>
<tbody>
<row>
<entry><p><codeph>TSDIOIsr aIsr</codeph></p></entry>
<entry>The ISR used to handle the function's interrupt.</entry>
</row>
<row>
<entry><p><codeph>TAny* aPtr</codeph></p></entry>
<entry>User defined data for use within the ISR.</entry>
</row>
</tbody>
</tgroup>
</table></p><p><b>Return value</b></p><p><codeph>KErrNone</codeph> if successful, <codeph>KErrAlreadyExists</codeph> if
an ISR already bound to the function's interrupt, or a standard Symbian platform
error code.</p></section>
<section id="GUID-ACEDEF93-FD3F-4F19-9641-36F4FAC8FE66-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-3"><title>Unbind()</title><p>The
function declaration for the <xref href="GUID-EAED145E-E4BE-3A0F-BC25-78E1FC13FB55.dita"><apiname>Unbind()</apiname></xref> method is:</p><codeblock xml:space="preserve">IMPORT_C TInt Unbind();</codeblock><p><b>Description</b></p><p>Unbinds
the callback from the interrupt controller, replacing the callback with a
dummy handler.</p><p><b>Parameters</b></p><p>None.</p><p><b>Return value</b></p><p><codeph>KErrNone</codeph> if
successful, otherwise a standard Symbian platform error code.</p></section>
<section id="GUID-ACEDEF93-FD3F-4F19-9641-36F4FAC8FE66-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-4"><title>Enable()</title><p>The
function declaration for the <xref href="GUID-1B8F9258-D611-39DC-B0A7-8BB634915752.dita"><apiname>Enable()</apiname></xref> method is:</p><codeblock xml:space="preserve">IMPORT_C TInt Enable();</codeblock><p><b>Description</b></p><p>Enables
the function's interrupt by setting the appropriate IEN bit in the CCCR. Note
that this only unmasks the global function interrupt. It is the responsibility
 of the client to perform any function-specific interrupt enabling that may
be required.</p><p><b>Parameters</b></p><p>None.</p><p><b>Return value</b></p><p><codeph>KErrNone</codeph> if
successful, otherwise a standard Symbian platform error code.</p></section>
<section id="GUID-ACEDEF93-FD3F-4F19-9641-36F4FAC8FE66-GENID-1-2-1-10-1-5-1-9-1-1-7-1-4-1-4-1-3-5"><title>Disable()</title><p>The
function declaration for the <xref href="GUID-229B7E6B-EF06-3C54-8D92-F1075B04D585.dita"><apiname>Disable()</apiname></xref> method is:</p><codeblock xml:space="preserve">IMPORT_C TInt Disable();</codeblock><p><b>Description</b></p><p>Disables the function's interrupt by clearing the appropriate IEN bit in
the CCCR.  Note that this only masks the global function interrupt. It is
the responsibility  of the client to perform any function-specific interrupt
disabling that may be required.</p><p><b>Parameters</b></p><p>None.</p><p><b>return
value</b></p><p><codeph>KErrNone</codeph> if successful, otherwise a standard
Symbian platform error code.</p></section>
</conbody></concept>