medium10 pts · first answer countsmicrocontrollersnvicinterrupts

Preemption priority versus subpriority

Two interrupts have the same preemption priority but different subpriorities. Interrupt A is running when B, with a better subpriority, becomes pending. What happens?

A.B preempts A at once because its subpriority is betterB.A is cancelled and B runs in its place, then A restartsC.B waits for A; subpriority only orders pending interruptsD.Both run at the same time on separate cores of the chip

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Preemption priority versus subpriority

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