Re: Using "delay until" in real-time

[JP Thornley <jpt@diphi.demon.co.uk>]

In article <9168vi$7mp$1@nnrp1.deja.com>, Ted Dennison
<dennison@telepath.com> writes
>I think this is essentially the same as my iteration-counting scheme,
>except that the "Major_Iteration_Rate" is set to 0.05 instead of 1.0,
>and the number of minor cycles is hard-coded.

Yes, I guess it is.

>
>I did simplify things a bit for my question. We are actually using 4
>minor cycles in our 60Hz major cycle.

Perhaps you can get a solution by avoiding the use of Duration. The
delay expression for a relative delay is only restricted to being "any
non-limited type" (9.6(5)), so why not declare your own:

   type My_Duration is delta (1/Iteration_Hz) range <whatever>;
   for My_Duration'Small use 1/Iteration_Hz;

(Although I would want to be very sure that my compiler was reliable
when dealing with a Small that was not a power of 2).

Cheers,

Phil

-- 
JP Thornley