Hello, I think I the question on using memory mapped are solved. Now I was wondering and cant find a big difference over the four skins, at least for a new project with no previous code written on the past. Is there any advantage in using the rtdm skin over the navive one?
Thanks so much. Carlos Novaes Em sex 01 jul 2011, às 04:57:27, Gilles Chanteperdrix escreveu: > On 06/30/2011 05:12 PM, Carlos Eduardo de Brito Novaes wrote: > > Hello all! > > Hope this question fits to the scope of the list. > > > > I got a PCI acquisition board and wish to write a xenomai driver for it. > > I had did this before with an old ISA board and used memory heaps to > > exchange data from kernel (configuration and mainly acquisition > > routines) and the real time processing task. > > > > Now, I would like to know if I can use only message pipes for this kind > > of application. I would like to use it so the entire proccess became > > more "unix like", using memory heaps I think that the internals of the > > driver are exposed and the any misfuncion can arise due to bad data > > passed from programmers. Is this right? > > > > Can message pipes provide hard real time timings, about 1K/10K samples > > per second and about 100 bytes on each sample? > > Hi, > > you probably should use the RTDM skin to write a driver. So, use the > "read" call to get data, or if there is a big volume, use some mmaped > aread, using rtdm_mmap_to_user. > > Regards. _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
