Re: [Xenomai-help] question

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

xd yang wrote:
 > hi all,
 >    i'm not quite clear about  how to communicate between a xenomai driver
 > and a standard linux driver. For exemple, i have a xenomai PCI device driver
 > ,a standard linux driver  and a application in the user  space. I need to
 > enter some commands  by the application,  which will be received by the
 > standard linux driver, and then should be passed to the  xenomai task, also
 > the same thing from xenomai to standard linux .
 > 
 >   I noticed that there is a API message pipe service offered, with this API
 > can i  solve this kind of question?  And for that Xenomai driver should open
 > his side of pipe at the beginning to the end to ensure he could receive or
 > send messages?
 > 
 >    thanks a lot,
 > xd_yang

I am not sure I understand what you need. The usual way for an
application to communicate with a driver, be it a real-time driver or
not, is to use the read/write/ioctl calls. So, if your application needs
to pass a special message to the drivers, implement an ioctl in these
drivers.

Message pipes are only useful if you want a real-time application to
communicate with a non real-time application.

-- 


					    Gilles Chanteperdrix.