Serial Com: COM1 being occupied.

[Dreamzdoll]

Hi all,

I am facing a problem when trying to open a com port (COM1), it says, it is already in use.
I tried to check the Mice and other pointing devices through device manager. I found that either a PS / 2 or a Serial Microsoft Ball point is enabled.
If I disable PS / 2 and Serial Microsoft Ball point, I dont get that problem.

I would like to know what is occupying COM1 and how to disable it through C / C++ Code.

Please help.

Thanks in advance,
Doll.

[Skizmo]

I would like to know what is occupying COM1 and how to disable it through C / C++ Code.

As far as I know, you can't. COM is a simple port, it has no management system like USB ports.

[mlgoff]

Skizmo is correct, if COM1 is in use try COM2, COM3, etc. (assuming you have moe than 2 COM ports.).

[cilu]

What do you want to achieve? Why do you want to disable it? Just use another one that is available. You can see that in the Device Manager.

[Dreamzdoll]

I have a situation where i have to use only COM1 for my communication, COM2, COM3, COM4 are being used for other communications. I need to do some thing which would disable the process or applications etc that are using the required COM ports, to let my project run. I want some C or C++ code to do this work, as i dont want to do it manually.

Please help.
Thanks
DOLL.

[VictorN]

It is a very serious design flaw to rely on some predefined com port numbers!
What will happen if some PC does not have COM2, COM3, COM4 at all?
If the only port COM1 was already assigned to IR communications and there is not any serial port connector? What will happen when only USB-to-serial adapters are available and port numbers are assigned automatically by device manager?
What to do if a connector for COM1 (or 2, or 3, ...) is broken?