Re: [rtl] Rt Comm Handshaking

[Bernhard Kuhn <kuhn@batian.lpr.e-technik.tu-muenchen.de>]

Vijay Subramani wrote:

>    The rt_com driver with RTLinux 2.2a does not read
> data from the mouse connected to the serial port.
> Wherease reading and writing works fine if I connect a
> null modem. Has it got something to do with the
> handshaking.

The power for a serial mouse is supplied over
one of the control-lines. AFAIR you have
to disable flow-control at all and set
the level of that pine manualy.
You can also perform a mouse reset over
that pin: the mouse will send an "M" after
the reset, if it uses the Microsoft protocol.

BTW: is it *realy* necessary for your application
to process mouse inputs in hard real time? I doupt!

Bernhard