On Mon, 25 Apr 2005, Mike Harrison wrote:

> High-priority ints will always be serviced in a predictable time. Low-priority ints may get delayed
> if a high-priority one is being serviced at the same time.

Just as high priority interrupts may get delayed if another high
priority interrupt is being serviced.  Using interrupt priorities is
generally more useful if you have exactly one high priority interrupt
source.

> Generally, a reasonable approach is to use low-priority ints unless there is a very good reason to
> do otherwise, and then only have one high-priority one.

I would say generally, don't use interrupt priorities at all unless
you have a specific reaason to do so.  Making all interrupts high
priority will use less code space, and will work fine for most
applications.

--
John W. Temples, III
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