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C2812 PIE, dispatcher and interrupt masks

Mads Lind Christiansen1
Prodigy 10 points

Hi

If I have configured the DSP/BIOS configuration (tcf) to Enable PIE and setup two PIE interrupts, eg. PIE INT1.4 & PIE INT1.6. Both using the Dispatcher and interrupt masks set to self (0x0001). Then this does NOT enable nested interrupts for these two? right?

So the way I understand the Interrupt Mask is that it is actually the HWI IER (in this case HWI 1) that is disabled during servicing of any of these interrupts?

Thanks,

Mads

  • 0
    TI__Mastermind 26780 points

    Mads,

    Setting an interrupt mask to “self” will mask the interrupt that is currently being serviced, and then enable all other interrupts that were previously enabled.  So it *does* allow nesting on top of the current interrupt, but it does not allow the interrupt currently being serviced to nest on itself (interrupting again, preempting the current servicing).

    If you want *no* nesting at all on top of a particular interrupt you should specify the interruptMask to be “all”.

    Yes, you’re right, the interruptMask relates to the IER register.

    Scott