Re: ldattach(8) alike util in NetBSD?

[Jukka Marin <jmarin%embedtronics.fi@localhost>]

On Mon, Feb 16, 2015 at 11:08:16PM +0100, Fredrik Pettai wrote:
> On 16 Feb 2015, at 08:27 , Jukka Marin <jmarin%embedtronics.fi@localhost> wrote:
> > You can set serial line speed with stty:
> > 
> > $ stty -f /dev/tty00 speed 115200
> > 
> > When the port is closed, the parameters (including speed) return to their
> > default values.
> 
> I tried this, even on another NetBSD machine with the USB serial device 
> attached, but ttyU0 immediately defaults back to 9600.
> I guess the USB serial port doesn?t act like an normal serial device, and
> is therefore regarded as closed and then return back to the defaults...

You need to have the port open by some program and then set the speed.  A
kludge I sometimes use is

$ sleep 3600 >/dev/tty00 &
$ stty -f /dev/tty00 speed 115200
$ echo "foobar" >>/dev/tty00

  -jm