Subject: RE: SDL-News: Priority of signals
From: Eric Lefevre (lefevre#verilogusa.com)
Date: Wed Oct 13 1999 - 16:12:32 GMT
Dear Juan Pablo
I'm afraid that it is not possible to set several priority levels when doing
a PRIORITY INPUT. I think that you should try to use the "enabling
conditions" (with the keyword "provided").
Your SDL code could look like this:
STATE idle;
INPUT sig;
PROVIDED is_sig_fired = FALSE;
TASK is_sig_fired := TRUE;
...
INPUT ack;
PROVIDED is_sig_fired = TRUE;
...
A screenshot is included to shows how you can do that with 3 or more
signals.
I hope this helps
Eric
> -----Original Message-----
> From: owner-sdlnews#sdl-forum.org [mailto:owner-sdlnews#sdl-forum.org]On
> Behalf Of Juan Pablo Albaladejo (Javier)
> Sent: Wednesday, October 13, 1999 3:27 AM
> To: sdlnews#sdl-forum.org
> Subject: SDL-news: Priority of signals
>
>
> The originator of this message is responsible for its content.
> -----From (Juan Pablo Albaladejo (Javier)) to sdlnews -----
>
>
> Dear sirs:
>
> Last monday I maked you a question, but I forgot to include my own
> e-mail address in the text. That is the reason why I send my
> message once more,
> but now with the address to which you can send your answer in
> case you can help
> me:
>
> albala#ic.uma.es
>
> This is my question:
>
> I am interested in definig the priority of three signals
> that must be
> received in one state. I know that there is a symbol called
> priority input that
> enables reception of prioritised signals, but it allows only two
> priority levels
> and I would like to work with three levels.
>
> I wold be very grateful if you could send me information on
> how can I
> define the priority of signals. Either if it must be done when
> definig the
> signals or if it is a matter of their reception.
>
> Thanks in advance.
>
> Juan Pablo.
>
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