Re: [ts-7000] Counters in hardware?

["Rich Wilson" <>]

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?

-- 
Rich Wilson


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