Peter wrote:

>> I don't think they make sense for two or three inputs. Not sure where the
>> threshold is. I guess the threshold depends also on the number of counts.
> 
> No, it does not. Vertical counters can be expanded to more than 8 bits 
> easily.

I'm not sure we understand each other here... What I meant was that the
number of inputs from which on it makes sense to use vertical counters
depends on the number of counts you want to count for each input. 

Let's say we have 8 inputs. That's maximum efficiency of the vertical
counters, and also maximum effort for the horizontal counters, so it's the
situation where typically vertical counters make most sense. And they do if
you count to 3, or to 7. But what if you count to 255? I think (not sure
though) that in this case, horizontal counters are better code-wise and the
same memory-wise.

Which means that the threshold (number of inputs) from which on it makes
sense to use vertical counters depends on the number of counts -- or am I
missing something?

This has nothing to do with the fact that of course vertical counters can
expanded easily (usually in byte steps, on normal PICs at least).

Gerhard

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