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[Concerto] M3 interrupts enabled by default

Disona
Genius 3050 points

Hello!
We've got some strange behavior of M3. Interrupts are generated and serviced after reset by default. Even if API function "IntMasterEnbale()" wasn't called. Is it normal?

Thank you =)

  • 0
    TI__Mastermind 19810 points

    Which interrupts you see are enabled? and what reset behavior are you observing (debug reset or XRSn)?

     

    Best Regards

    Santosh

     

  • 0 in reply to Santosh Athuru
    Genius 3050 points

    Hello. interrupts, enabled by IntEnable() are enabled. i was not correct. I meant interrupts are enabled globally by default. Just like "EINT" in C28. It's observed during debug sessions.

    let me explain: we have set a timer and enabled an interrupt of this timeer. I expect, that inerrupt will not be serviced until i call IntMaterEnable(). But they are. Should I call IntMasterDisable at the beginning of a program to disable ints globally? 

    thank you.

  • 0 in reply to Disona
    TI__Mastermind 19810 points

    You are right, on M3 it looks like interrupts are enabled by default at the CPU level. They are disabled at the NVIC level.

    so if you don't want the interrupts to get triggered while you enable it, you have to use IntMasterDisable(), then enable interrupts at NVIC level and then use IntMasterEnable().

     

    Best Regards

    Santosh