Re: Re: xPL/xAP an alternative to C-Bu$ ?

["Mal Lansell" <mlansell@xxxxxxxxxxxxxx>]

----- Original Message -----
From: "David Buckley" <db@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, May 20, 2004 8:44 PM
Subject: [ukha_d] Re: xPL/xAP an alternative to C-Bu$ ?


--- In ukha_d@xxxxxxx, "Mal Lansell" <mlansell@f...> wrote:

>> BTW, what do you use to generate the DMX commands?  Is
>> there another one chip solution or did you roll your own?
>
> Its a one chip solution I rolled myself.
>
> Generating DMX512 is easy using bit-banging; send a space for
> 88uS as the DMX frame separator, then the mark-after-space
> break of at least 8us, then bitbang out a zero meaning
> "dimmer information follows", then as many as 512 bytes of
> level information.

Yeah, the DMX side did seem to be the simpler.  My issue with the PIC was
whether it would be fast enough to control the triacs for dimming 8 lights.
That problem goes away if I use the dimmer chip, and I won't have to code
quite as optimally to handle the other functions (DMX commands , RS232 PC
Interface and lightswitch monitoring).

Mal