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<h2>
<a name="1205722"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">cache_enable_data</font>
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<p>
<a name="1205723"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Enable the data cache</font>
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<h3>
<a name="1205724"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1205725"> </a><font size=2 face=Courier><strong>#include <cache.h><br></strong></font>
<a name="1270976"> </a><font size=2 face=Courier><strong>int cache_enable_data( void );<br></strong></font>
<h3>
<a name="1205727"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<a name="1205728"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<h3>
<a name="1205730"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
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<a name="1205731"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>0</strong></font> on success, <font size=2 face=Courier><strong>-1</strong></font> if an error occurs.</font>
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<h3>
<a name="1205732"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
</h3>
<p>
<a name="1205733"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>-1</strong></font> if the cache registers have been locked or if the data cache is already enabled.</font>
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<h3>
<a name="1205734"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
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<p>
<a name="1269822"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This function enables the data cache by writing to the <span class=Signal>EnableDCache</span> register.</font>
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<p>
<a name="1269823"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The data cache should be configured before it is enabled, by making calls to <font size=2 face=Courier><strong>cache_config_data</strong></font>.</font>
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<p>
<a name="1269790"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Most ST20 caches must be invalidated prior to being enabled; on such processors, <font size=2 face=Courier><strong>cache_enable_data()</strong></font> will automatically invalidate the cache before enabling it, to guard against data loss. As such, it is not necessary to call <font size=2 face=Courier><strong>cache_invalidate_data()</strong></font> in order to enable the cache. </font>
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<h3>
<a name="1205737"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Callable from</font>
</h3>
<p>
<a name="1205738"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A task, interrupt service routine or a high priority process (on an ST20C2).</font>
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<h3>
<a name="1269900"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">See also</font>
</h3>
<p>
<a name="1269913"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><a href="libs3.htm#1205562"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_config_data</i></font></a>, <a href="libs7.htm#1205722"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_enable_data</i></font></a>, <a href="libs8.htm#1269916"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_enable_instruction</i></font></a>, <a href="libs11.htm#1205853"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_invalidate_data</i></font></a></font>
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