(Sorry for joining the conversation late=85)

On Mar 29, 2017, at 8:46 AM, Van Horn, David <david.vanhorn@backcountryacce=
ss.com> wrote:

> You don't have to power the pullups unless you are reading the switches.=
=20
> I use this a lot.  Turn on the pullup(s), read the switch(es) and then tu=
rn the pullups off.

Can=92t you simply add to this:  =93Once you know which pins are grounded, =
and which are floating, set all of the floating pins to outputs (and leave =
the grounded pins as inputs), and THEN turn off the pullups.=94
Then you have grounded inputs consuming zero power, and unconnected outputs=
 consuming zero power.

It might be slightly shorter (code wise) to only turn off the pullups of th=
e grounded pins?  (Oh wait, I guess most PICs don=92t have per-pin pullups?=
)

BillW


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