could you help me please?

["edopicardi@libero.it" <ed...@libero.it>]

Hi all,sorry for bothering you ;-)
I'm just a student trying to develop some Servlet...
I'm trying to use COM ports from a servlet running in TOMCAT 3.2.4 ,but i get the error message :"Port COM1 does not exist." 
What can i do to make com ports visible from a servlet?
Could you help me please? 
My email address is edopicardi@libero.it

Thanx in advance :-) looking forward to your answer.
Best regards,
Edo 


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Re: could you help me please?

["Mr. Cristian Romanescu" <c....@finsiel.ro>]

The problem isn't that easy.
First of all I developed an application using parallel port (it's a 
matter of choice :)):
I found a big issue accesing port from Java...finally my option was to 
write an dynamic library (dll) in Ms Visual C (because is directly in 
assembler)
where I wrote the basic I/O functions with parallel ports.
Then using JNI (Java Native Interface) I called the methods from java, 
wherever I wanted to send something to the parallel port.

Unfortunately this works fine only in '95/'98...in NT/2000 blah...you'll 
need privilege access (or you'll get privilege exception from kernel)
There is a way for this also...there is a program (i can't remember 
now... search google) which gives privileges access to ports to yer java 
virtual machine.
So I suppose you should start tomcat's JVM with this application 
launcher and then load the dll from there...

I wrote my app in Swing, so I can't help you further (ie where to put 
your dll or so...)


Hope this helps.

c.


edopicardi@libero.it wrote:

>Hi all,sorry for bothering you ;-)
>I'm just a student trying to develop some Servlet...
>I'm trying to use COM ports from a servlet running in TOMCAT 3.2.4 ,but i get the error message :"Port COM1 does not exist." 
>What can i do to make com ports visible from a servlet?
>Could you help me please? 
>My email address is edopicardi@libero.it
>
>Thanx in advance :-) looking forward to your answer.
>Best regards,
>Edo 
>
>
>--
>To unsubscribe, e-mail:   <ma...@jakarta.apache.org>
>For additional commands, e-mail: <ma...@jakarta.apache.org>
>
>  
>



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Re: could you help me please?

[Peter Choe <ch...@mindspring.com>]

isn't COM microsoft specific?

At 06:59 AM 1/21/2003, you wrote:
>Hi all,sorry for bothering you ;-)
>I'm just a student trying to develop some Servlet...
>I'm trying to use COM ports from a servlet running in TOMCAT 3.2.4 ,but i 
>get the error message :"Port COM1 does not exist."
>What can i do to make com ports visible from a servlet?
>Could you help me please?
>My email address is edopicardi@libero.it
>
>Thanx in advance :-) looking forward to your answer.
>Best regards,
>Edo
>
>
>--
>To unsubscribe, e-mail:   <ma...@jakarta.apache.org>
>For additional commands, e-mail: <ma...@jakarta.apache.org>



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