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CCS/TMS320C5535: errors about interrupt

Part Number: TMS320C5535

Tool/software: Code Composer Studio

Hi guys,

I want to configure my own project's interrupt and followed  the steps in the  examples in c55_csl_3.06.

First included < csl_intc.h>,and declared the VECSTART as follows"extern void VECSTART(void);".

But when i built the project some errors occured.

It seemed that IRQ_plug and VECSTART were not defined.I were puzzled why?Something i lost?

Forthur more,i searched these two in the example project supplied in  c55_csl.IRQ_plug  is declared in < csl_intc.h> but not defined in < csl_intc.c>.VECSTART  was not searched.

why the example can be built successfully and my own project can not?