On Wed, Mar 08, 2000 at 04:18:43PM -0500, ahgu wrote:
> We plan to use rtlinux and gtk-- for the GUI.
> There is GNU LPGL attached to both. Does that mean I have to release the
> source code and make sure I don't charge anything for the software I
> devolope?
You have to release source code unless you only make changes in the form
of loadable kernel modules you write yourself and that do not contain
any GPL code. You can charge whatever you want, but you must release
GPL'd code for media costs.
>
> Thanks
> Andrew
>
>
> ----- Original Message -----
> From: Phil Wilshire <[EMAIL PROTECTED]>
> To: Thomas Eschenbacher <[EMAIL PROTECTED]>; RTL Group <>
> Sent: Wednesday, March 08, 2000 1:34 PM
> Subject: Re: [rtl] accessing device driver from user space
>
>
> > Thomas Eschenbacher wrote:
> > >
> > > Hallo,
> > >
> > > is there any simple way to access an RT device driver from user space?
> > >
> > > My problem is that we have a C library that has to access a serial ports
> > > /dev/ttyS0 through the "rt_com" driver.
> > >
> > > I use rtlinux-2.2, kernel-2.2.14/i386 and the rt_com-0.4. The kernel,
> > > modules and examples work fine, even the examples in rt_com do work
> > > (open the port, send bytes etc.). The device driver uses char-major-60
> > > and the serial driver of the linux kernel is removed.
> > > I did "rm /dev/ttyS0" and "mknod /dev/ttyS0 c 60 0".
> > >
> > > The example modules are able to call open("/dev/ttyS0", O_RDWR),
> > > but if I copy this line to a sample program I always get -1 as return
> > > value?
> > >
> > > can anybody explain me why???
> > >
> > > thanks,
> > > Thomas.
> > > --
> > >
> > Do a ls -l /dev/ttyS0
> >
> > The permissions may be set so that only root can open for read / write
> >
> > Regards
> > phil Wilshire
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> >
>
>
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--
---------------------------------------------------------
Victor Yodaiken
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