Why stop at 1 A2D per tristate pin ?

I have a couple of PRETESTED macros gathering mushrooms to do two A2D
per pin. Needs a couple of diodes and a feed back resistor.

Regards,
Graham Daniel.

Scott Dattalo wrote:

> I tried a variation of this (the above code has not been tested) to cut
> the number I/O pins in half needed for Byte Craft Tip #4. BC tip #4 is
> an 'A/D converter' made from two PIC I/O pins, a couple resistors, and a
> capacitor. Dynamically changing the I/O direction allows you to
> implement the tip with just one I/O pin. Unfortunately, 5-bits was about
> all it was good for.
>
> Scott