Events and while loops -- better way?

[Stephen Boulet]

How can I do this better? :

Say I have a while loop with a boolean in it called "Done?". It's wired
to the while loop's control boolean via a NOT gate, and of course the
loop exits when the boolean is pressed.

This eats up CPU cycles and so is very inefficient. Is there a way to do
this better?

-- Stephen

[CraigGraham]

> Say I have a while loop with a boolean in it called "Done?". It's wired
> to the while loop's control boolean via a NOT gate, and of course the
> loop exits when the boolean is pressed.
>
> This eats up CPU cycles and so is very inefficient. Is there a way to do
> this better?

Not really any way of doing it better.

It doesn't waste a ridiculous amount of CPU power if you put, say, a 100ms
delay in the loop- this is short enough for the user not to notice a delay
when pressing it, but means your program only does the check ten times a
second. You ARE already putting a delay in the loop, of course ;).

[451_f@my-deja.com]

In article <39CF734C.262A5958@comm.mot.com>,
stepheb@comm.mot.com wrote:
> How can I do this better? :
>
> Say I have a while loop with a boolean in it called "Done?". It's
wired
> to the while loop's control boolean via a NOT gate, and of course the
> loop exits when the boolean is pressed.
>
> This eats up CPU cycles and so is very inefficient. Is there a way to
do
> this better?
>
> -- Stephen
>




As yet another method:

Place your boolean along with the invert in a Case structure, say in
the true case, place a false in the false case, wire the output of the
case to the done, and then use one of several types of triggers to
select the true case. As a possible trigger, read the count from the
iteration counter, divide it by 1000 using the quotient an
d remainder
function, and when the remainder = 0 read the boolean. This causes a
read every that is selectable between every 10, 100, 1000, 10000...
cycles, depending on your divisor. You could also set up a trigger
using the real time clock, this would give timing that was not
dependent on loop times.

Hope this gives you some help.

Marlin Rhea



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