> > I need to add another device in this system as an additional display
> > (retrieve data from S repeatedly and display it), but trying to
> figure
> > out the best way to do this.  It will have to be bit-banged.  Let's
> > call it N.  Here are the options I've come up with...
>=20
> Do you have an extra IO pin? Have an extra pin between N and M. Use it
> to communicate between N and M who wants to access S? Something like
> "if
> the busy line is high, wait until it's low"? Sort of like multi-master,
> but you can code-reuse the existing I2C bit bang routines without
> modification.

Or even just use it as an interrupt to M to tell it when N wants more data.=
 Will at least reduce the I2C traffic a reasonable bit, as M won't need to =
poll N to find out when it wants data.
--=20
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--=20
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