Hi, Ray Schumacher wrote: > Has anyone used Python and a hard real-time OS/patch to schedule timed events? > We have started in on Debian and RTAI, and may be using LXRT. > (I've been reading > http://people.mech.kuleuven.be/~psoetens/lxrt/portingtolxrt.html)
you should really also try http://www.xenomai.org; IMHO it has a much cleaner API than RTAI. And it even works for PPC targets, if thats of interst to you (both 2.4 and 2.6 kernels). Userspace RT programming works like a charm. > I was envisioning that we really only need a separate RT-process in C using > RDTSC or ACPI clocking that can get its control messages from non-RT Python > every 50ms or so, to toggle pins on parport0. > Any pointers, examples, etc for communicating from Python to an RT task? Xenomai has lots of communication primitives -- I even can imagine a simple c-coded python extension to communicate over rt queues. Xenomai also has a "posix RT" skin, which tries to provide all of the POSIX RT extensions, maybe even a recompile of python and linking against the posix rt skin of xenomai would be enough. HTH, Stefan. > > Thanks, > Ray -- http://mail.python.org/mailman/listinfo/python-list
