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On Sat, 8 Jan 2011, Robert Csaba Molnar wrote:

> I start having problems when trying to read the iButton several times
> in a short period of time (connect/disconnect the iButton). The CN
> does not trigger the interrupt in this case.
>
> I suspect that the iButton is not completely discharged so when the
> iButton is connected ,the change is to small for the PIC to notice it.
>
> Has anyone experienced this problem?=A0

Yes, it's a known issue with the iButton.

> As a last resort I can use a timer and try to read the button
> regardless if it's there or not, but I do not want to waste cpu cycles
> on this if there is another way to do it.

That's the usual solution.

--
John W. Temples, III=

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