Re: [ts-7000] Multiple CPUs on PC104 stack

[Larry <>]

Wouldn't it be easier to use a counter to do this in hardware
and read the counter output? Basically a serial to parallel converter.
Something like a 74161?


Kevin Cozens wrote:

mfmikula wrote:
> I need a pulse counter board. Technologic does not make one. Other
> companies do, but they are power hungry. I'd like to use a second TS-
> 7260 on my stack doing brute force counting on its DIO1 inputs. I
> would welcome answers to:
>
> 1) Is this possible?

My application uses a kernel module to count pulses applied to a pin of the
DIO1 header (on a TS-7250) so, yes, it is possible.

> 3) My counting program produces counts that are within 1% accuracy
> when counting input pulses that are 20 kHz. But the counts are not
> consistent.

You may need to consider using a kernel with real time patches to give you
better response time in counting the pulses. It will depend somewhat on
whether you are counting pulses in user space or kernel space.

--
Cheers!

Kevin.

http://www.ve3syb.ca/ |"What are we going to do today, Borg?"
Owner of Elecraft K2 #2172 |"Same thing we always do, Pinkutus:
| Try to assimilate the world!"
#include <disclaimer/favourite> | -Pinkutus & the Borg

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