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<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

ASSP/Variant. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<section id="GUID-1342D8AC-CE52-488F-84BE-B87D4018B873"><title>ISR

Table</title> <p>Decide on the number of interrupts that exist in

the system. If the port is split into a core ASSP layer, and a device

Variant layer, the core layer should include only those interrupts

that exist on the ASSP. </p> <p>In the core ASSP implementation, declare

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

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

the <codeph>TemplateInterrupt</codeph> class: </p> <codeblock id="GUID-733FA201-2D43-5044-AAEA-D98D26BF3B36" xml:space="preserve">const TInt KNumTemplateInts=EAsspIntIdZ+1;

class TemplateInterrupt : public Interrupt

    {

 ...

 public:

     static SInterruptHandler Handlers[KNumTemplateInts];

    };

            </codeblock> <p> <codeph>SInterruptHandler</codeph> is

defined in <filepath>...\e32\include\kernel\arm\assp.h</filepath>,

and <codeph>TemplateInterrrupt</codeph> is defined in <filepath>...\template_assp\template_assp_priv.h</filepath>. </p> </section>

<section id="GUID-1AC207D8-5395-4583-BCF1-7C952609D227"><title>Interrupt

IDs</title> <p>Declare an enum in an exported header file that provides

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

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

// operating on the corresponding interrupt controller registers (for example, using their value as a shift count)

//

// EXAMPLE ONLY

enum TTemplateAsspInterruptId

    {

    // ASSP or first-level Interrupt IDs

    EAsspIntIdA=0,

    EAsspIntIdB=1,

    EAsspIntIdC=2,

    EAsspIntIdD=3,

    EAsspIntIdE=4,

    // ...

    EAsspIntIdUsb=11,

    EAsspIntIdDma=12,

    // ...

    EAsspIntIdZ=25

    };</codeblock> </section>

</conbody></concept>