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<h2>
<a name="1206953"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">interrupt_pending_number</font>
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<p>
<a name="1206954"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Return pending interrupt numbers</font>
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<a name="1206955"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1206956"> </a><font size=2 face=Courier><strong>#include <interrup.h><br></strong></font>
<a name="1206957"> </a><font size=2 face=Courier><strong>int interrupt_pending_number( void );<br></strong></font>
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<a name="1206958"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<a name="1206959"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<a name="1206961"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
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<p>
<a name="1206962"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A mask specifying which interrupt numbers are currently pending.</font>
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<h3>
<a name="1206963"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
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<a name="1206964"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<a name="1206965"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
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<p>
<a name="1206966"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Return which interrupt numbers are currently pending, that is, all the interrupts which are currently set by the peripherals. This simply involves reading the interrupt level controller's <span class=Signal>InputInterrupts </span>register and combining it with the software register maintained by <font size=2 face=Courier><strong>interrupt_raise_number()</strong></font>.</font>
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<p>
<a name="1206967"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em>Note: This function cannot be fully implemented for ILC-3, therefore its use is not recommended with any ILCs; <font size=2 face=Courier><strong>interrupt_test_number()</strong></font> should be used instead.</em></font>
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<h3>
<a name="1206968"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Applies to</font>
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<a name="1206969"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">ILC-None, ILC-1, ILC-2.</font>
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<a name="1206970"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Callable from</font>
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<a name="1206971"> </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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<p>
<a name="1272563"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em>Note: Edge-triggered interrupt handlers should not call this function to query their own interrupt since they will find the <span class=Signal>pending</span> bit already reset before running the applications handler. Instead, they should use the interrupt handlers argument to differentiate between different interrupt numbers; see <a href="libs44.htm#1206829"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_install</i></font></a><font face="Verdana, Arial, Helvetica, sans-serif">.</font></em></font>
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<h3>
<a name="1206972"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">See also</font>
</h3>
<p>
<a name="1206973"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><a href="libs47.htm#1242528"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_pending</i></font></a>, <a href="libs53.htm#1207150"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_test_number</i></font></a></font>
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