Re: Interrupt Handler Problems

[Ted Dennison <dennison@telepath.com>]

In article <1999Jul7.160434.10447@nosc.mil>,
  claveman@cod.nosc.mil (Charles H. Sampson) wrote:
>      I'm working on a project that uses a Motorola MVME2700 board
> (PowerPC CPU), VxWorks, the Green Hills Ada 95 compiler, and a lot of
> military boards in the rack (NTDS cards, GPS interfaces, etc.).  This
is
> a porting effort, of Ada 83 code that is currently using a different
CPU
> and a different operating system.
>
>      We're having a terrible time getting our code running in the new
> environment.  The killer problem of the moment is interrupt handlers.
> (We have a lot of them.)  Our handlers have been modified into
protected
> procedures, as required by Green Hills, but they don't seem to be
seeing
> the interrupts.  Green Hills assures us that interrupts are enabled
when
> the main program begins executing.  However, when we enable them our-
> selves in a little test program, its interrupt handler begins working.
> When we enable them in our "real" code, VxWorks blows up with a
> workQPanic.  The three vendors are now in a finger-pointing contest
(the
> Navy term is ruder), each claiming that it's not their fault, it must
be
> caused by one of the others.
>
>      This is clearly not a general Ada issue; discussing it in this
fo-
> rum appears inappropriate.  If there's anybody who has worked with the
> same or a similar environment and would be willing to exchange email
on
> lessons learned and suggestions, I'd be happy to hear from them.
Please
> note that my email address in this post has been anti-spammed.
>
> 			    Charlie
> --
> ******
>
>      For an email response, my user name is "sampson" and my host
> is "spawar.navy.mil".
>

(crosspoted to comp.os.vxworks since it is relevant there too)

Well, my suggestions would be to try to get one simple Ada interrupt
handler working. Then try to get a simple C interrupt handler for your
device working. Then try to get an Ada interrupt handler for your device
working.

I gather that you have done at least some of that. Right?

--
T.E.D.


Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.