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<h2>
<a name="1206485"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">interrupt_disable</font>
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<p>
<a name="1206486"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Disable an interrupt level</font>
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<h3>
<a name="1206487"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1206488"> </a><font size=2 face=Courier><strong>#include <interrup.h><br></strong></font>
<a name="1206489"> </a><font size=2 face=Courier><strong>int interrupt_disable( int <font size=2 face=Courier><strong><em>Level</em></strong></font> );<br></strong></font>
<h3>
<a name="1206490"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<a name="1231504"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong>int </strong></font><font size=2 face=Courier><strong><em>Level</em></strong></font></b></font>
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<dl><dl> <dl>
<dt> <a name="1231506"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Interrupt level</font>
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</dl></dl>
<h3>
<a name="1206493"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
</h3>
<p>
<a name="1206494"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>0</strong></font> for success, <font size=2 face=Courier><strong>-1</strong></font> if an error occurs.</font>
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<h3>
<a name="1206495"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
</h3>
<p>
<a name="1206496"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>-1</strong></font> if the interrupt level is illegal.</font>
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<h3>
<a name="1206497"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>
<p>
<a name="1206498"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Disable interrupt level <font size=2 face=Courier><strong><em>Level</em></strong></font>. This involves writing to the interrupt controller's <span class=Signal>Mask</span> register.</font>
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<p>
<a name="1206499"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em>Note: 1 Although the global enables bit can still be specified as <font size=2 face=Courier><strong>INTERRUPT_GLOBAL_ENABLE</strong></font> this usage is no longer recommended; use the function <font size=2 face=Courier><strong>interrupt_disable_global()</strong></font> instead.</em></font>
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<p>
<a name="1206500"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em> 2 This function is provided as part of the IntC library, and so is always available whichever ILC is used. However, when ILC-2 and ILC-3 are being used, the ILC library enables all interrupt levels, and expects them to remain enabled, so that interrupts can be controlled using the function <font size=2 face=Courier><strong>interrupt_disable_number()</strong></font>. Thus the use of <font size=2 face=Courier><strong>interrupt_disable()</strong></font> is discouraged.</em></font>
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<p>
<a name="1272730"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em> 3 Any code running on an ILC-2 or ILC-3 which uses this function to dismiss a level-sensitive interrupt will become locked at interrupt. The function <font face="Verdana, Arial, Helvetica, sans-serif"><b>interrupt_disable_number()</b></font> should be used instead.</em></font>
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<h3>
<a name="1206504"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Applies to</font>
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<a name="1206505"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">ILC-None, ILC-1.</font>
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<h3>
<a name="1206506"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Callable from</font>
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<p>
<a name="1206507"> </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="1206508"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">See also</font>
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<p>
<a name="1206509"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><a href="libs35.htm#1206512"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_disable_global</i></font></a>, <a href="libs36.htm#1206535"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_disable_mask</i></font></a>, <a href="libs38.htm#1206584"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_enable</i></font></a></font>
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