Re: Freeware port analyzer


"Bob Masta" <NoSpam@xxxxxxxxxxx> wrote in message
news:44214ffc.1616728@xxxxxxxxxxxxxxxxxxxxx
On Tue, 21 Mar 2006 20:31:59 -0600, "Abstract Dissonance"
<Abstract.Dissonance@xxxxxxxxxxx> wrote:


"JeffM" <jeffm_@xxxxxxxxx> wrote in message
news:1142989502.315575.321510@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
freeware windows port analyzer ?
Jon (Abstract Dissonance)

http://groups.google.com/group/comp.arch.embedded/browse_frm/thread/ee2df8756faa5f91?q=aspycom+docklight+serial-protocol-analyzer+zzz+free-DOS-analyzers+analysing-*-communication-problems+from-a-Windows-system+serial-or-parallel-ports+portmon+Windows-application+zzzz+5-serial-channels+ComLite32+Windoze-app


I didn't see anything in there about the parallel port ;/ The main thing I
need is a parallel port... Surely there is one out there that works with
it... if not I guess I will have to move to it(but its much more work that
for the parallel port since I have the cables setup for it)


If you are using Win9x you can probably cobble together
some code to read the parallel port directly. WinXP, NT,
and 2K don't allow user-mode access to ports, so you'd need
a special ring 0 driver like GIVEIO or USERPORT.

Unlike serial ports, parallel ports are not clocked devices.
So you will have to decide how often you want to look at
the port. Note that timing is definitely not Windoze strong
suit, so expect a fair amount of jitter and don't expect to
get fine resolution (high sample rate).

The hilarious part of all this, is that the earliest 8088
PC running DOS was orders of magnitude better than
the fastest Windows system for this kind of stuff.

Best regards,


I'm just doing this for the keyboard so I just need it to run from 10khz to
20khz. Its not clocked but if the application could use one port for the
clock to sample another port then it should work? Or even just set the
speed at which to sample?

Basicaly what I want to do is hook the keyboard up to the parallel port and
then hit keys and read the data being sent. I have the parallel port all
setup to do this easy but it looks like I'm going to have to do it with a
serial port since that seems to be the only one with the extensive
applications.


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator

Thanks,
Jon


.

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