Re: Re: Xpl-Dmx.Lcd

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

Hi Lehane

> I'm still not sure how you plan to do this?
> Are you going to use a new start code and a DMX channel per character
> position?

Nope.......The idea at the moment is to have a seperateprograming 
connector
which can be used  to download messages using xPL ...When the user inserts
the programming dongle the pic will start looking for xPL commands and when
the dongle is removed it will revert to looking for Dmx
commands..........So
the lighting levelsent to the lcd channel would relate to a message in a
message table...The xPL app would have a copy of the current message table
for reference,otherwise it would be hard to remember message 20
is"garage
door is open" etc.........
Of course message 20 would be getting sent to the dmx lcd continually until
a new message was sent ,but ther pic would just compare to current message
and ignore it if they are the same.....

> Are you going to use a new start code and a DMX channel per character
> position?

This would be a better approach  but im not sure if the Milford Dmx Tx unit
will recognise and sent out different start codes....This approach would be
more flexible.....Only problem i see is if you have more than one dmx-lcd
how do you indicate which one must capture the data to display ?? unless
you
use say the first byte as unit number and after that data...???

Frank



----- Original Message -----
From: "g8kmh" <lehane@xxxxxxx>
To: <ukha_xpl@xxxxxxx>
Sent: Saturday, November 27, 2004 12:20 AM
Subject: [ukha_xpl] Re: Xpl-Dmx.Lcd


>
>
> Frank,
> I'm still not sure how you plan to do this?
>
> Are you going to use a new start code and a DMX channel per character
> position?
>
> Lehane
>
>
> --- In ukha_xpl@xxxxxxx, "Frank Mc Alinden"
<fmcalind@b...>
> wrote:
> > Hi All
> >          im thinking of  having a go at making a dmx lcd as
> described in a
> > previous post...But   i would need someone to write an app which
> would be
> > similiar to OSD.BASIC  but would require a message number  as a
> parameter
> > and the app  would need to store the message table for reference
and
> > updating ...I would like to base it around a 2x 20 pled ??
lcd...I
> have a 2
> > x 16 at the moment and they require no backlit as the text is
green
> on a
> > black background... I did enquire about a 4 x20 display but they
> are not
> > available as yet..... If  this could be done soon i can start on
> the xPL
> > side while i wait for my Dmx kit to arrive.....
> > Thanks
> >  Frank
>
>
>
>
>
>
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http://www.xpl.myby.co.uk
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