Re: Data acquisition thru serial port

No, it's highly unlikely that you would be able to continuously and reliably
monitor something directly with the serial port in that way. Maybe you
should consider using a small, cheap processor with built-in hardware
counters and building a serial interface on top of that. For example, there
are hundreds of variants of the 8051 processor which have I/O inputs, maybe
even some which are 12V tolerant, and serial ports. You'd have to specify a
serial protocol which both your 8051 code and the Pocket PC code would
follow to reset the counter, return the count value, etc., and design a
little 'box' with the processor and maybe some peripheral circuitry in it.

Alternatively, there are a lot of small, relatively cheap "data acquisition
systems" out there with serial interfaces on them. I'm sure some of them
have counter functions.

The last point is that .NET CF is not particularly well-suited for this type
of application, as it stands now. I think you'd quickly find that 50% of
your time was working around limitations on the CF, while only 50% was on
the real application code.

Paul T.

"Alberto Silva" <albertosilva@_mundomovel_.com> wrote in message
news:%23sYky2XRDHA.2144@TK2MSFTNGP11.phx.gbl...
> Hi,
> I was thinkink on developing a VB.net application to help me on some
> off-road activities...
>
> To help me with roadbooks, I would need a distance counter, and I was
> sugested to use a 'pulse' counter, either conected to one wheel, or to a
> 'pulse generator' that my Discovery provides.
>
> The idea would be to convert the 12V pulse sign to 5V and control them
from
> my iPaq 5450 with VB.net with a serial conection.
>
> My problems...
> - I may expect up to 100 pulses per second... can such performance be
> achieved from the compact framework?
> - Where can I find source-code for this particular need (it's not data
> transmission, only status change...)
>
> Thanks in advance,
> Alberto Silva
>
>