On Sat, 9 Aug 2008, Sebastian Kuzminsky wrote: > Date: Sat, 09 Aug 2008 15:13:34 -0600 > From: Sebastian Kuzminsky <[EMAIL PROTECTED]> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Stepper configuration > I could add a "threadsafe" flag to the board driver struct, which gets > set by the board driver if the board I/O hardware is thread safe (PCI), > and cleared if it's not (EPP). The high-level hostmot2 driver would > examine this and only export the "full" read()/write() functions if the > board driver is not thread safe. If the board driver *is* thread safe, > the hostmot2 driver would in addition export gpio_read()/gpio_write(). > > The PCI drivers would work just as well as they would if hostmot2 didnt > have to care about thread safety in the low-level drivers.
That sounds like a good solution. Never know what people may want to do with the GPIO pins, so if fast thread access is possible in the hardware, the driver should allow access. > > The EPP drivers would work just as poorly as they would in any case (ie, > no quick access to gpios). But at least they wouldnt be broken like the > m7i43_hm2 driver is, due to my earlier misunderstanding of RTAI > multitasking model! > > > -- > Sebastian Kuzminsky > You think you can defeat me with your rebellious beard? > <http://www.youtube.com/watch?v=k_QAPjtO2cA> > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
