Raymond Choat wrote:
>
>I have already tested the slave boards using a switch on input and an led
>on
>the output. Seems to work perfect. So I am 98% sure its in the MASTER or
>Master Program. When the Master and Slave is hooked together and tested I
>get correct signals also but the Master still does not "Pause" till   _done
>signal is recieved from slave. I have never had something so simple be
>sooooo hard.
>Wrong Way Ray (Ray Choat)
>

Don't be so convinced that you're doing something so simple that it just
*has* to work.

In theory, you are, indeed, performing a simple task.

Back in the real world, however, getting 2 microprocessors (each running
their separate programs at multi-megahertz rates) is not necessarily all
that simple.

Unless you can flip your switch in microseconds and see the LED light in the
same microsecond kind of time frame, your manual test isn't doing anything
close (speedwise) to what your master micro is doing. Your test may be
comforting but its results are not a reflection of the 'real world' in which
your system is operating.

Getting a reliable command/response handshake going between your master and
its slaves will go a long way toward resolving your problem.

Regards, Bob



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