Com port configuratin
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Posts: 46,084
Where can I get more information about com port configurations? I am
using a lap top that requres an adaptor from a 25 pin to 9 pin
cable. The Basic Stamp Editor shows a connection on COM3 but can't
find the stamp ("No Stamp Found"). Any suggestions on how to trouble
shoot this?
Mike
using a lap top that requres an adaptor from a 25 pin to 9 pin
cable. The Basic Stamp Editor shows a connection on COM3 but can't
find the stamp ("No Stamp Found"). Any suggestions on how to trouble
shoot this?
Mike
Comments
on the back of the PC then that is a
parallel printer port.
If it is a male-type DB25 (it has pins)
on the back of the PC, and
you are using an off-the-shelf DB25 to DB9
adapter, then the cable must be straight
through (no null modem).
I haven't seen a DB25 Male port on a laptop
in several years -- maybe your's is an old
one?
Usually the hardware COM port on a laptop
comes out COM1 -- COM3 is typically not used,
and COM2 is typically a modem (if installed).
Personally, I've installed a USB serial
adapter as Com3. Com3 has also been used
as the IR-port, on newer laptops.
If this doesn't answer your questions,
next time tell us the year, model, and
vendor of the laptop, and what you
have your BS2 plugged in to (BOE,
etc).
--- In basicstamps@yahoogroups.com, "mikeschnobrich" <mjsnow@d...>
wrote:
> Where can I get more information about com port configurations? I
am
> using a lap top that requres an adaptor from a 25 pin to 9 pin
> cable. The Basic Stamp Editor shows a connection on COM3 but can't
> find the stamp ("No Stamp Found"). Any suggestions on how to
trouble
> shoot this?
>
> Mike
but also an I/R port and possibly a built-in modem. In a Windows environment
it can be real fun to get it all working. Tell us more about the laptop and
we may be able to assist further.
It may be worth noting that many of the DB25 to DB9 adapters / converters
(not cables) do not work for anything but a mouse. All of the necessary
lines are not passed from one end to the other.
Pins 3 & 4 on a standard DB9-DB9 and DB25-DB25 cable will be straight
through. On a standard DB25-DB9 cable they will cross. Null cables will be
just the opposite.
Original Message
> If it is a female-type DB25 (it has sockets)
> on the back of the PC then that is a
> parallel printer port.
>
> If it is a male-type DB25 (it has pins)
> on the back of the PC, and
> you are using an off-the-shelf DB25 to DB9
> adapter, then the cable must be straight
> through (no null modem).
>
> I haven't seen a DB25 Male port on a laptop
> in several years -- maybe your's is an old
> one?
>
> Usually the hardware COM port on a laptop
> comes out COM1 -- COM3 is typically not used,
> and COM2 is typically a modem (if installed).
> Personally, I've installed a USB serial
> adapter as Com3. Com3 has also been used
> as the IR-port, on newer laptops.
>
> If this doesn't answer your questions,
> next time tell us the year, model, and
> vendor of the laptop, and what you
> have your BS2 plugged in to (BOE,
> etc).
> > Where can I get more information about com port configurations? I
> am
> > using a lap top that requres an adaptor from a 25 pin to 9 pin
> > cable. The Basic Stamp Editor shows a connection on COM3 but can't
> > find the stamp ("No Stamp Found"). Any suggestions on how to
> trouble
> > shoot this?
laptop and, just before I installed the stamp IDE, someone answered a
previous question about having to disable it on a Toshiba to get the
communications with the stamp going. I did the same, and it's worked for
me. On NT, FIFO is an advanced setting for a COM port.
I never tested with FIFO enabled.
hth
Original Message
From: mikeschnobrich [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=LpojF9fwBWlXxJ7AenUJkjiPvaWyQ_XpTq_IPgAWh8ngP5GAJi-ZBZtxvMfY0Kq_WF4LAq3lz0cekJx1Iw]mjsnow@d...[/url
Sent: Sunday, May 18, 2003 10:52 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Com port configuratin
Where can I get more information about com port configurations? I am
using a lap top that requres an adaptor from a 25 pin to 9 pin
cable. The Basic Stamp Editor shows a connection on COM3 but can't
find the stamp ("No Stamp Found"). Any suggestions on how to trouble
shoot this?
Mike
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