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1 <?xml version="1.0" encoding="utf-8"?> |
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2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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3 <!-- This component and the accompanying materials are made available under the terms of the License |
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4 "Eclipse Public License v1.0" which accompanies this distribution, |
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5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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6 <!-- Initial Contributors: |
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7 Nokia Corporation - initial contribution. |
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8 Contributors: |
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9 --> |
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10 <!DOCTYPE concept |
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11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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12 <concept id="GUID-B9B35999-0937-51C5-BB77-91A6C039CE2F" xml:lang="en"><title>ISR Table and Interrupt IDs</title><shortdesc>The ISR Table and Interrupt IDs must be defined by the |
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13 ASSP/Variant. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody> |
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14 <section id="GUID-1342D8AC-CE52-488F-84BE-B87D4018B873"><title>ISR |
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15 Table</title> <p>Decide on the number of interrupts that exist in |
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16 the system. If the port is split into a core ASSP layer, and a device |
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17 Variant layer, the core layer should include only those interrupts |
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18 that exist on the ASSP. </p> <p>In the core ASSP implementation, declare |
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19 a static <xref href="GUID-76A30EC4-4B99-5471-9E80-F853C91485BC.dita#GUID-76A30EC4-4B99-5471-9E80-F853C91485BC/GUID-77E83634-BBF6-5190-9434-9FB700547CD0">ISR table</xref>, of type <xref href="GUID-2C9B6510-D045-3FA1-AD65-B544E30D34C7.dita"><apiname>SInterruptHandler</apiname></xref> with |
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20 the same number of entries that you have just worked out. </p> <p>In the template port, for example, this table is static member of |
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21 the <codeph>TemplateInterrupt</codeph> class: </p> <codeblock id="GUID-733FA201-2D43-5044-AAEA-D98D26BF3B36" xml:space="preserve">const TInt KNumTemplateInts=EAsspIntIdZ+1; |
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22 |
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23 class TemplateInterrupt : public Interrupt |
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24 { |
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25 ... |
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26 public: |
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27 static SInterruptHandler Handlers[KNumTemplateInts]; |
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28 }; |
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29 </codeblock> <p> <codeph>SInterruptHandler</codeph> is |
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30 defined in <filepath>...\e32\include\kernel\arm\assp.h</filepath>, |
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31 and <codeph>TemplateInterrrupt</codeph> is defined in <filepath>...\template_assp\template_assp_priv.h</filepath>. </p> </section> |
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32 <section id="GUID-1AC207D8-5395-4583-BCF1-7C952609D227"><title>Interrupt |
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33 IDs</title> <p>Declare an enum in an exported header file that provides |
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34 labels for each of the possible <xref href="GUID-76A30EC4-4B99-5471-9E80-F853C91485BC.dita#GUID-76A30EC4-4B99-5471-9E80-F853C91485BC/GUID-8E58F4C9-0290-55E0-A4FD-B6C2361BE205">Interrupt ID</xref>s in the table. </p> <p>For example, in the template |
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35 port, the interrupt IDs are defined by the <codeph>TTemplateAsspInterruptId</codeph> enum, defined in <filepath>...\template_assp\template_assp.h</filepath>, and is part of the ASSP layer: </p> <codeblock id="GUID-9E221131-1A5C-5969-8A1B-945D943D70E0" xml:space="preserve">// Enumerate here all ASSP interrupt sources. It could be a good idea to enumerate them in a way that facilitates |
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36 // operating on the corresponding interrupt controller registers (for example, using their value as a shift count) |
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37 // |
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38 // EXAMPLE ONLY |
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39 enum TTemplateAsspInterruptId |
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40 { |
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41 // ASSP or first-level Interrupt IDs |
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42 EAsspIntIdA=0, |
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43 EAsspIntIdB=1, |
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44 EAsspIntIdC=2, |
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45 EAsspIntIdD=3, |
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46 EAsspIntIdE=4, |
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47 // ... |
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48 EAsspIntIdUsb=11, |
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49 EAsspIntIdDma=12, |
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50 // ... |
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51 EAsspIntIdZ=25 |
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52 };</codeblock> </section> |
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53 </conbody></concept> |