VCOMM - Getting the COM signals ...

[Hakan Olsson Todos]

Hi!

I'm trying to get a signalling overlook on the COM-ports,
right down to the individual pins inside Windows. Not being very
skillful at hardware programming, I've found (and heard of)
VCOMM.H in C and set forth to MSDN to investigate this further ...

So I'll now try all of you, out there in PB-land ...
How to use something like that?

I want a fully controllable COM-port, w o any programming skills
over my minor capacity!!! I'd made it in DOS but that's another
story, or isn't it ???

Please ... someone ...???



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[Lance Edmonds]

Maybe some of the goodies at www.lvr.com may be of help? It certainly would be easier than rewriting a C-code COMM library.

Essentially, you can use inline-assembler to manipluate ports, but only under Windows 95/98/ME. Under NT/2000, you must use a kernel-mode driver (similar to a VxD used in Win9x/ME). You should be able to find the necessary libraries at Lake View Reasearch.



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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Tom Hanlin]

The easy solution is PowerBASIC's own built-in comm handling. See the COMM function
and COMM statement in the PB help or manuals.

If this doesn't offer you enough control, the Windows comm APIs are very flexible,
but can get fairly complicated.

If you still need more, you're probably going to need a custom device driver, which
is liable to be yet more complicated and likely expensive.

Or, perhaps it would be reasonable to have your Windows program interact with your
DOS comm program, if you already have a DOS program that suits your needs.


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Tom Hanlin
PowerBASIC Staff

[Russ Srole]

If you need a kernel level driver for NT/2000 get the one from www.sstnet.com. It's free and works well. You need to fiddle with
the delaration file to change the alias to "C mangled" names. Use
Dependency Walker (depends.exe) to get the correct names.

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