--- In "Rich Wilson" <> wrote:
>
> On 9/23/07, naturalwatt <> wrote:
> >
> > I have an application that needs to count pulses coming in from two
> > electricity meters. The
> > pulses are about 10mSec, so it would be (barely) possible to watch for
> > them in a program,
> > but I am worried about missing pulses when the system load is
non-zero.
> >
> > It would seem better to use a hardware counter, and read it every
minute
> > or so. Searching
> > the list, Peter Elliott mentioned TS-XDIO. This seems to be a
feature of
> > the 7260 only, and
> > having read the manual, I am still not clear if it does what I
want. Our
> > standard platform is
> > the 7250, although I have used a 7260 in one instance.
> >
> > I need *two* counters, of minimum 8 bits, preferably more, that can be
> > read and reset by
> > software. I want to avoid external hardware. Do I need to read the
7260
> > manual even more
> > slowly?
> >
> > Or is this something I should ask Technologic to do within the
FPGA? Or
> > hire someone else
> > to write some FPGA configuration?
> >
> > I don't really understand my options here - please be gentle with me!
> >
> > Martin
> >
> >
> >
>
> Wild idea: Connect your two signals to two interrupt lines on the
PC104 bus,
> and write a device driver to count interrupts?
We commissioned TS to build a daughterboard for the TS-7300 (TS-733)
that has an encoder counter on board. This drives a single 16 bit
register. It also has a single-pin high speed counter, something I
had planned to use for LIRC (linux infrared control) so as to be able
to control the TS 7300 via an ordinary TV remote. I'd guess it would
not be too difficult for TS to adapt that to your use.
(I'm still hoping that someone will step forward with knowledge of
LIRC code... I find that code completely opaque....)
--Yan
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|