From: John E. Perry <j.e.perry@co...> - 2007-02-15 20:19:54
> I find that to be a very intriguing concept and I have also begun to
> persue such an implementation. I am working on a system that requires
> sensor sample rates as high as 5000Hz and so far I have not been able to
> achieve this with only a single 400xm BT Gumstix.
This seems to be an ideal slot for a genuine real-time operating system
like QNX, which is built for both hard real-time capability and
umix-like programming environment. Has anyone built a QNX system for
the Gumstix, or any other ARM system? BSP's are available for the PXA's,
but, of course, QNX is not free.
There are several free real-time executives that are already ported to
ARM processors. They don't have the complete self-hosted programming
environment of QNX or linux, but many have cross-development
environments like Gunstix's.
This kind of application would be nearly trivial if QNX or another RTOS
were already ported to the Gumstix. Porting is not so easy, of course,
but RTOS's are specifically written for this kind of programming, and
linux is only slowly approaching real-time ability, and will probably
never achieve the kind of performance common to these systems.
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