[REBOL] Re: Question
From: philippe:arsenne:club-internet at: 14-May-2003 13:36
Thank you very much
I think you're right when you say that it's a dead standard
I've got instruments who use RS232, i'll try that.
I wanted to try parallel port because it's rather visible for students (i'm
a physics teacher involved in process control)
cheers
philippe
-----Message d'origine-----
De : [rebol-bounce--rebol--com] [mailto:[rebol-bounce--rebol--com]]De la part de
Petr Krenzelok
Envoyé : mercredi 14 mai 2003 10:07
À : [rebol-list--rebol--com]
Objet : [REBOL] Re: Question
Philippe Arsenne wrote:
>I'm trying to learn Rebol especially to make a little application for
>process control.Ineed to read and write ports (parralel port)
>Have you got URL or examples for that
>
>I'm Philippe Arsenne a french physician dummy in rebol
>
>thanks a lot
>
Hello Philippe,
we tried to do some stuff using parallel port. The thing is - Rebol does
not support it directly (it does support only standard Serial ports). We
got as far as basic nibble and PS2 mode communication and after several
weeks we gave up in favor of embedded ethernet + tcp/ip stack (there is
plenty of simple enough solutions around)
Don't get me wrong - parallel port is the most screwed interface I saw
to date - nibble, byte, PS2, EPP (two separate standards IIRC), ECP -
each single OS supports it in a different way - if you want to handle
ECP or EPP, you have to go for .vxd drivers etc. kind of stuff.
So - you either find some fine libraries which do the job for you (and
there are some, but sometimes they are too pricey, we used some free
io.dll we found on internet) or I suggest you to give up on parallel
port and try other interface, and not waste your time with already dead
standard
...
Cheers,
-pekr-
