On 4/27/2012 1:45 PM, andy pugh wrote:
> On 27 April 2012 18:05, Dave<e...@dc9.tzo.com>  wrote:
>
>    
>> I looked at the tri-state comp functions and although I understand what
>> a tri state is, I didn't see it as really being very useful.
>>      
> Its main use is probably simply as an interface between IO pins (such
> as the PID gain pins) and output pins. You can't normally net Output
> to IO pins.
>
> However, there have been occasions where I have been inconvenienced by
> the fact that output pins get written to each and every cycle. I just
> can't recall the circumstances, possibly a comp which wanted to the
> use the same variable internally.
>
>
>    

It is probably one of those things where you know you need it, when you 
run into an issue.

Dave

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