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[oneday]

Dear experts:

        I have a question about When does an Alarm status need to be cleared? For example,If the software alarm1 is configured as IRQ0, I would like to know whether the alarm status (AG10[1]) corresponding to the software alarm1 needs to be cleared in the interrupt service function in a practical application scenario. Can I clear the alarm status (AG10[1]) after executing the interrupt service function? If the software alarm1 is not cleared, is there any problem or impact during the use?

Looking forward to your reply.

[dw · Accepted solution]

    MODULE_SMU.AG[alarmGroup].U =
        (uint32)((uint32)0x1U << alarmPos);


    MODULE_SMU.AEXCLR.U = (uint32)((uint32)0x1U << alarmEx);

As I known, SMU needs to clear above 2 bit in the ISR routine, it's hard to say there is any unexpected issue if you don't clear or clear the regs later. I suggest to follow the example code at least there is no harm and that could make sure to enable the interrupt again if any new SMU event happens.