Serial communication (COM / RS232) and Win XP.

[Guest]

"Home-made" program made and compiled with LAbView 4.0 for set-up of medical equipment (Gould rack) working OK on very old PC (486) with Win 3.10 and RS232-RS422 communication

Upgraded program with LabView 7, recompiled, works OK on an old computer with Win NT and RS232-RS422 communication

On a brand new PC (Dell P4 2.8 GHz) with WinXP Pro unable to obtain proper communication via COM-port (RS232) on PC and Gould rack

Any specialities with setup of COM-port/RS232 and Win XP compared to Win 3.10/NT?

 

[Dave]

there are lots of differences from win 3.1. but if it works on nt4 i would
expect it to work under xp. under nt/2000/xp you can not directly access
the com port hardware as you could under win 3.1/95/98/me. but if you are
using standard labview stuff i would expect it to work under xp. have you
tested the com port with something like hyperterminal under xp to be sure it
is set up and physically working? check the hardware settings in the device
manager also to be sure it has the right irq/address. and make sure it is
enabled in the bios.

"Home-made" program made and compiled with LAbView 4.0 for set-up of

medical equipment (Gould rack) working OK on very old PC (486) with Win 3.10
and RS232-RS422 communication.

Upgraded program with LabView 7, recompiled, works OK on an old computer

with Win NT and RS232-RS422 communication.

On a brand new PC (Dell P4 2.8 GHz) with WinXP Pro unable to obtain proper

communication via COM-port (RS232) on PC and Gould rack.

Any specialities with setup of COM-port/RS232 and Win XP compared to Win

3.10/NT?

 

[Malke]

"Home-made" program made and compiled with LAbView 4.0 for set-up of
medical equipment (Gould rack) working OK on very old PC (486) with
Win 3.10 and RS232-RS422 communication.

Upgraded program with LabView 7, recompiled, works OK on an old
computer with Win NT and RS232-RS422 communication.

On a brand new PC (Dell P4 2.8 GHz) with WinXP Pro unable to obtain
proper communication via COM-port (RS232) on PC and Gould rack.

Any specialities with setup of COM-port/RS232 and Win XP compared to
Win 3.10/NT?

Yes. Modern operating systems like XP won't let programs interact
directly with the hardware. That sounds like what your home-made
program is doing. This simply won't work in XP. You would be best off
to just keep a machine around running the operating system that works
best for your special software.

Good luck,

Malke