At 07:37 PM 12/20/2003 -0500, Olin Lathrop wrote:

>Tony Harris wrote:
>> My second timer is causing an interrupt every ~4us,
>
>That's a problem.  Even at 20MHz, that's only 20 instructions.

Which pics run at 1 MIPS/MHz?

>  It takes over 10 to get into and out of an interrupt, which doesn't leave many instructions to do anything useful.  Your code is probably locked up
>spending all of its time in the interrupt handler.

Task swapping overhead is definitely eating you alive here.
You need to decrease the frequency of the interrupt, by some means.

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