On Sun, Mar 29, 2015 at 08:38:28PM +1300, IVP wrote:
>=20
> > You need a way to detect when DO is floating, rather than
> > hide it.
> >=20
> > When floating, the signal will stay at the same level for some
> > time. It will swing if it is driven or has a resistor.  Does your
> > dsPIC have software switchable pull-down resistors?
>=20
> Having another look at the PCB to refresh my memory, DO
> has, and always has had, a 47k pull-up to Vcard. ISTR the
> actual recommended value is 50k

Okay, so code for missing DO low at the expected time.

--=20
James Cameron
http://quozl.linux.org.au/
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.