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  1. @sicco - two options: - copy the existing...

    @sicco -

    two options:

    - copy the existing isr code
    - use interrupt chaining.

    with both: keep care of the interrupt priorities.

    And note that the core disables interrupts, sometimes....
  2. Why this tone? Just write your isr, if you feel...

    Why this tone?
    Just write your isr, if you feel you need it.

    have fun,
    Frank

    period. :)
  3. More or less, yes. But why would this be...

    More or less, yes.
    But why would this be important? What is the usecase?
    Normally, an interrupt line is used for such things - if timing is important.

    Edit: And remember that the serial...
  4. Yup, b) sounds as it could be the reason. Not...

    Yup, b) sounds as it could be the reason.
    Not sure what the events are good for - this is one of the reasons not to use them.
    But of course - it could just be a disabled interrupt too. This happens...
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