1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3 4<head> 5<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 6<META name="GENERATOR" content="IBM WebSphere Studio Homepage Builder Version 7.0.0.0 for Windows"> 7<META http-equiv="Content-Style-Type" content="text/css"> 8<title>OS_InitIrqTable</title> 9<LINK rel="stylesheet" href="../../css/nitro.css" type="text/css"> 10</head> 11 12<body> 13 14<h1 align="left">OS_InitIrqTable <IMG src="../../image/NTR.gif" align="middle"><IMG src="../../image/TWL.gif" align="middle"></h1> 15<h2>Syntax</h2> 16 17<dl> 18 <dd> 19<CODE>#include <nitro/os.h></CODE><BR> 20 <BR> 21 <CODE>void OS_InitIrqTable( void );</CODE></dd> 22</dl><h2>Arguments</h2> 23<P>None.</P> 24<h2>Return Values</h2> 25<p>None.</p> 26<H2>Description</H2> 27<P>This function initializes the IRQ interrupt table.</P> 28<P>The IRQ interrupt table is a table that is used to register which functions to jump to when an IRQ interrupt occurs. The table is divided along each IRQ interrupt cause.</P> 29<P>Once this function has been called to initialize the table, functions that do nothing in response to most interrupts will have been set; however, <CODE>DMA</CODE>, <CODE>NEW DMA</CODE>, and <CODE>TIMER</CODE> interrupts register interrupt handlers that are prepared on the OS side. If the user registers a handler for these interrupts, these interrupts will be called from the interrupt handler provided by OS. The user does not need to be aware of this difference. Immediately after <CODE>OS_InitIrqTable()</CODE> is called, it should appear as though nothing is being done for any of the interrupts.</P> 30<P>Since this function is called from within <CODE><A href="../init/OS_Init.html">OS_Init()</A></CODE>, there is no need to call it when <CODE><A href="../init/OS_Init.html">OS_Init()</A></CODE> is called.</P> 31<h2>See Also</h2> 32<p><A href="OS_SetIrqFunction.html"><code>OS_SetIrqFunction</code></A>, <A href="OS_GetIrqFunction.html"><code>OS_GetIrqFunction</code></A></p> 33<H2>Revision History</H2> 34<P>2005/07/19 Added description of calling from <CODE><A href="../init/OS_Init.html">OS_Init()</A></CODE>.<br />2005/03/08 Standardized the Japanese word for "interrupt."<br /> 2004/03/01 Updated description of operation at initialization.<br /> 2003/12/01 Initial version.</P> 35<hr><p>CONFIDENTIAL</p></body> 36</html> 37
