On Sat, 15 Jul 2000, Reginald Neale wrote:

> Does anyone have experience with Scott Dattalo's a2d.asm code? This
> is a routine for doing A/D on a chip (e.g., 16C84) that doesn't have
> a built-in A/D converter. It uses the voltage to be measured to
> charge a capacitor, and measures the charge/discharge time.

not exactly, it's really a sigma delta type convertor.

>
> I'm trying to use the 2-pin version of this code and having problems.
> I notice it's no longer on his web page...

I'm not sure where you were looking, but it's right here:

http://www.dattalo.com/technical/software/pic/a2d.asm

What problems are you having? Did you change the code? It's one of those
isochronous algorithms - the timing is critical.

Scott

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