Re: pci-dio

From: Peter Wetjens (peterwetjens_at_planet.nl)
Date: 09/07/03 

Date: Sun, 7 Sep 2003 19:39:36 +0200

be back, got some trouble with my system..
"kevin" <x@no.email> schreef in bericht
news:bMx3b.10896$v57.10714@nwrdny02.gnilink.net...
> In article <bigeae$rmj$1@reader08.wxs.nl>, "Peter Wetjens"
> <peterwetjens@planet.nl> wrote:
> > Currently i'm using the driver from w.jasper
> > (ftp://lx10.tx.ncsu.edu/pub/Linux/drivers). It works fine. (I've been to
> > comedi.org, but couldn't get the driver compiled just right.)
>
> What kind of problems were you having? Were they compile errors? I've
> had my share of problems too. Most of my problems were with linking with
> the kernel source. Most of these problems are addressed comedi.org's
> mailing list: https://cvs.comedi.org/pipermail/comedi/
>
> > I have a greenhouse with an old climat-controll-computer from priva.
> > It's a 16bits TI, real solid state: no drives, only a numeric keyboard,
> > no console-mode, just some programs in eprom.
>
> I went to Priva's website: http://www.priva.ca/vialux.htm Is their model
> listed? Do you have any documentation like a pdf manual that you could
> send me?
>
> > The purpose of my experiments is to exchange the TI for a PC (suse,
> > kernel 2.2, apache etc), so that i can easily program my own actions,
> > like open windows, turn on/off watering system, heating system, etc. The
> > old system has 64 "out"-channels, adressable by of course 6 bits,
> > digitally, and 64 "in"-channels, with similar adressing, but the
> > in-signals are fed analog into the TI. The pci-dio24 takes care of the
> > adresses, but i need an ADC (resolution >=12 bits) to read the
> > in-signals (like windspeed, temperature, humidity, light) into my PC.
>
> This sounds like a cool mod. Looks like when you remove the TI controller
> you're left with some extra modules, like digital encoders (ENC) and
> analog multiplexers (AMUX). You could possibly use the pci-dio24 to
> substitute the TI if you use 12 digital output lines for control and then
> use the rest of the lines as an input from a 12bit ADC chip. The ADC will
> need some additional control lines but depending upon your resolution
> needs you could probably just go with an 8bit ADC and have four lines left
> over for ADC control. The other option is to dump some of your AMUX
> and/or ENC control lines. I don't know your long term application plans
> but it seems like controlling 16 digital outputs and only 16 analog inputs
> may fit your requirements. This would allow you to use a 12bit ADC and
> leave 4 additional control lines.
>
> Check this one out. You could also send the ADC digital output to a
> serial port on the PC:
> http://www.wikipedia.org/wiki/Analog_to_digital_converter
>
> The best way to get an ADC into the system to just buy an off-the-shelf
> ADC to RS232 module:
> http://www.integrityusa.com/daqitemw.asp?record=42
>
> There are tons of places that sell this kind of stuff. Check out Jameco
> or CircuitCellar.
>
> > An application like labview doesn't seem fit to my purposes. Like to
> > read your opinion.
>
> LabVIEW certainly does seem like overkill, price-wise. I would continue
> trying to get Comedi working and then use it with something free like
> tcl/tk or even some bash scripts. I say that because it doesn't look like
> you need high speed data acquistion.
>
> You're app sounds cool. I look forward to hearing more about it.
>
> -Kevin

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