[oopic] Re: events again

--- In oopic@yahoogroups.com, "dogulas" <dogulas@...> wrote:
>
>
> Dennis,
>
> OOPic III+ Ver C.1.1+ Compiler 6.1.1
>
> I'm seeing similar squirrly behavior. I have a complex program that
> used an event triggered by a bumper switch. When the switch was
> activated the event handler did not execute but the main loop
stopped
> executing as well. To track down what is wrong, I started out with
the
> sample code in "Chapter 9 - Event Driven ProgrammingC". It didn't
work.
> I was reading this thread and I wrote the following test program
which
> is very similar to your test:
>
> Dim BLINK As New oEvent
> Dim WIRE As New oWire
> Dim LED As New oDIO1
>
> Sub Main()
> LED.IOLine = 20
> LED.Direction = cvOutput
> ' Call BLINK_Code()
> WIRE.Input.Link(ooPIC.Hz1)
> WIRE.Output.Link(BLINK.Operate)
> WIRE.Operate = cvTrue
> Do
> Loop
> End Sub
>
> Sub BLINK_Code()
> LED = cvOn
> ooPIC.Delay = 500
> LED = cvOff
> ooPIC.Delay = 500
> End Sub
>
>
> When I run it as is, nothing happens. The led does not light up.
I put
> in the extra line to prove to myself that the problem was not in
the led
> and wierd behavior ensued. The led flashed on and off exactly ten
times
> with a little pause during the eighth off period. The tenth on
period
> stays on contiuously. After the tenth flash, one of the servos
moves
> slightly. At this point, I have to reset the OOPic to reprogram
it.
> This behavior is repeatable.
>
> In my original complex program, everything execpt the event works
fine.
>

Yes but... Do you know if event code is reentrant? Assuming your
version of the compiler has OOPic.Delay in mS (it used to be 0.01
second in V5) then your event code COULD take longer than the
OOPic.1Hz trigger interval.

I haven't made the transition to V6 so I don't know a lot about the
issues but if I were doing the code above, I would start by cutting
the delays to 250 to be absolutely certain the event code was
complete before the next trigger.

Richard

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