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Thread: Multiple IRQ'S ?
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face BY : Kbek Tony email (remove spam text)



Hi,

Mike wrote:
>If the interrupt signal is likely to be too short to be able to poll in
the
>ISR, then maybe you could use something like an SR flip flop for each
IRQ.
>The incomming interrupt would set the output of the flip flop which can
be
>diode OR'ed to the int pin.  The ISR would have the responsibility of
>clearing each flip flop after servicing its interrupt.  With a bit of

Yes that was my idea.

>cunning (and a resistor or two) you could use the same PIC pin to read
and
>reset the flip flop.

Hmm this got me stumbled, how ? cant figure out a circuit that would
work
using the same pin as input/reset.
Would You care to elaborate ?


/Tony

Tony KŸbek, Flintab AB            
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