Making driver for Linux in Java?

Re: Making driver for Linux in Java?

Tux <mario_zupan@in et.hr> wrote in message news:<bum9ec$fl [email protected] .hr>...[color=blue]
> Is it possible and does someone try to make driver
> for Linux in Java, for some USB device?
> Could Java do that ?
> I saw jUSB package but it seems that works only with the
> devices which Linux already see.[/color]


The short answer is no. ...well kinda. Consider these two factors:

* It doesn't make sense to make a driver in a high-level language
(like Java) unless the rest of the system is also a high level
language so it can easily interface to the driver.

* Java is designed to be hardware-independent. That is reflected in
the 'write once, run anywhere' mantra. If you write code to interface
to the hardware directly, you have to write native code. You would
then have to recompile this native code for each OS and ship the
correct shared library for others to use it.

So you could make a native driver for use by other Java apps...but is
this what you want?

---
Jared Dykstra

Re: Making driver for Linux in Java?

Tux <mario_zupan@in et.hr> wrote in message news:<bum9ec$fl [email protected] .hr>...[color=blue]
> Is it possible and does someone try to make driver
> for Linux in Java, for some USB device?
> Could Java do that ?
> I saw jUSB package but it seems that works only with the
> devices which Linux already see.[/color]


The short answer is no. ...well kinda. Consider these two factors:

* It doesn't make sense to make a driver in a high-level language
(like Java) unless the rest of the system is also a high level
language so it can easily interface to the driver.

* Java is designed to be hardware-independent. That is reflected in
the 'write once, run anywhere' mantra. If you write code to interface
to the hardware directly, you have to write native code. You would
then have to recompile this native code for each OS and ship the
correct shared library for others to use it.

So you could make a native driver for use by other Java apps...but is
this what you want?

---
Jared Dykstra

Re: Making driver for Linux in Java?


"Jared Dykstra" <dyksjare@hotma il.com> wrote in message
news:ba84b53e.0 401220046.34ed9 [email protected] gle.com...[color=blue]
> Tux <mario_zupan@in et.hr> wrote in message[/color]
news:<bum9ec$fl [email protected] .hr>...[color=blue][color=green]
> > Is it possible and does someone try to make driver
> > for Linux in Java, for some USB device?
> > Could Java do that ?
> > I saw jUSB package but it seems that works only with the
> > devices which Linux already see.[/color]
>
>
> The short answer is no. ...well kinda. Consider these two factors:
>
> * It doesn't make sense to make a driver in a high-level language
> (like Java) unless the rest of the system is also a high level
> language so it can easily interface to the driver.
>
> * Java is designed to be hardware-independent. That is reflected in
> the 'write once, run anywhere' mantra. If you write code to interface
> to the hardware directly, you have to write native code. You would
> then have to recompile this native code for each OS and ship the
> correct shared library for others to use it.
>
> So you could make a native driver for use by other Java apps...but is
> this what you want?
>
> ---
> Jared Dykstra
> http://www.bork.org/~jared[/color]

OK. It doesn't need to be a driver but can I make Java application
which reads from USB devices but for that devices driver doesn't exist?
p.s.
jUSB package for Java exist but I can't understand can I use it if Linux
doesn't see my device because there is not proper driver for it.

Re: Making driver for Linux in Java?


"Jared Dykstra" <dyksjare@hotma il.com> wrote in message
news:ba84b53e.0 401220046.34ed9 [email protected] gle.com...[color=blue]
> Tux <mario_zupan@in et.hr> wrote in message[/color]
news:<bum9ec$fl [email protected] .hr>...[color=blue][color=green]
> > Is it possible and does someone try to make driver
> > for Linux in Java, for some USB device?
> > Could Java do that ?
> > I saw jUSB package but it seems that works only with the
> > devices which Linux already see.[/color]
>
>
> The short answer is no. ...well kinda. Consider these two factors:
>
> * It doesn't make sense to make a driver in a high-level language
> (like Java) unless the rest of the system is also a high level
> language so it can easily interface to the driver.
>
> * Java is designed to be hardware-independent. That is reflected in
> the 'write once, run anywhere' mantra. If you write code to interface
> to the hardware directly, you have to write native code. You would
> then have to recompile this native code for each OS and ship the
> correct shared library for others to use it.
>
> So you could make a native driver for use by other Java apps...but is
> this what you want?
>
> ---
> Jared Dykstra
> http://www.bork.org/~jared[/color]

OK. It doesn't need to be a driver but can I make Java application
which reads from USB devices but for that devices driver doesn't exist?
p.s.
jUSB package for Java exist but I can't understand can I use it if Linux
doesn't see my device because there is not proper driver for it.

Re: Making driver for Linux in Java?

You still need to have the driver installed and loaded by the Linux kernel,
then you could write a piece of code in C that can interact with the dirver
through the datastructs. This C library then will need to implement the JNI
interface that allows C code to interface with Java applications this is how
you can gain access to the data being sent by the USB deivce and be able to
send data to that USB device.

Roman.
[color=blue]
> OK. It doesn't need to be a driver but can I make Java application
> which reads from USB devices but for that devices driver doesn't exist?
> p.s.
> jUSB package for Java exist but I can't understand can I use it if Linux
> doesn't see my device because there is not proper driver for it.
>
>[/color]

Re: Making driver for Linux in Java?

You still need to have the driver installed and loaded by the Linux kernel,
then you could write a piece of code in C that can interact with the dirver
through the datastructs. This C library then will need to implement the JNI
interface that allows C code to interface with Java applications this is how
you can gain access to the data being sent by the USB deivce and be able to
send data to that USB device.

Roman.
[color=blue]
> OK. It doesn't need to be a driver but can I make Java application
> which reads from USB devices but for that devices driver doesn't exist?
> p.s.
> jUSB package for Java exist but I can't understand can I use it if Linux
> doesn't see my device because there is not proper driver for it.
>
>[/color]

Re: Making driver for Linux in Java?

Could you please look at http://jusb.sourceforge.net/ and tell me what is a
procedure to use that package? I think that C-code isn't necessary.
Which language is usually uses for writing a Linux driver?


"Roman" <anonuser@shaw. ca> wrote in message
news:nQJQb.2631 98$ts4.159277@p d7tw3no...[color=blue]
> You still need to have the driver installed and loaded by the Linux[/color]
kernel,[color=blue]
> then you could write a piece of code in C that can interact with the[/color]
dirver[color=blue]
> through the datastructs. This C library then will need to implement the[/color]
JNI[color=blue]
> interface that allows C code to interface with Java applications this is[/color]
how[color=blue]
> you can gain access to the data being sent by the USB deivce and be able[/color]
to[color=blue]
> send data to that USB device.
>
> Roman.
>[color=green]
> > OK. It doesn't need to be a driver but can I make Java application
> > which reads from USB devices but for that devices driver doesn't exist?
> > p.s.
> > jUSB package for Java exist but I can't understand can I use it if Linux
> > doesn't see my device because there is not proper driver for it.
> >
> >[/color]
>
>[/color]

Re: Making driver for Linux in Java?

Could you please look at http://jusb.sourceforge.net/ and tell me what is a
procedure to use that package? I think that C-code isn't necessary.
Which language is usually uses for writing a Linux driver?


"Roman" <anonuser@shaw. ca> wrote in message
news:nQJQb.2631 98$ts4.159277@p d7tw3no...[color=blue]
> You still need to have the driver installed and loaded by the Linux[/color]
kernel,[color=blue]
> then you could write a piece of code in C that can interact with the[/color]
dirver[color=blue]
> through the datastructs. This C library then will need to implement the[/color]
JNI[color=blue]
> interface that allows C code to interface with Java applications this is[/color]
how[color=blue]
> you can gain access to the data being sent by the USB deivce and be able[/color]
to[color=blue]
> send data to that USB device.
>
> Roman.
>[color=green]
> > OK. It doesn't need to be a driver but can I make Java application
> > which reads from USB devices but for that devices driver doesn't exist?
> > p.s.
> > jUSB package for Java exist but I can't understand can I use it if Linux
> > doesn't see my device because there is not proper driver for it.
> >
> >[/color]
>
>[/color]