Hi Bas.

what I'm after is a low-end platform like the BeagleBone running most or all of 
LinuxCNC with the best stepper performance achievable while still running one 
of the userthreads RT styles, RTAI being not an option and Xenomai heading for 
userthreads.

I'd be willing to put some effort into making it a showcase that it can be done 
(really just because this community is dead conservative about such issues and 
really needs to be rubbed into hard numbers to be convinced;) Sergey did it 
with his FIQ scheme, you did it with the coprocessor doing the stepgen, so its 
possible in principle

that said, of course I'm not trying to extort any intellectual property out of 
you which you're not willing to open for good reasons (well in reality of 
course I tried, but having worked for a Dutch company for a decade I rest my 
case immediately ;)

I'm open to alternate ideas; I'd hope we can Xenomai for that board in a 
reproducible fashion (I hope) and configuration/build support for LinuxCNC per 
se

I'd be at loss how we address the coprocessor code issue - I'm open for ideas; 
maybe a public slow and proprietary fast solution - I dont know

how should we go about it?

- Michael



Am 23.11.2012 um 01:29 schrieb Bas Laarhoven:

> On 21-11-2012 21:22, Charles Steinkuehler wrote:
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>> 
>> 
>> I'd also like to see the PRU code as part of LinuxCNC, which means
>> open-source licensed, likely GPLv2+.  It looks like your existing code
>> is licensed only with the BeBoPr board?
> Yes, I've already invested a lot of time and money in this product and 
> to be able to
> continue development I would like to see some returns on my investments.
> If I open-source it now, any copycat can start selling my design, 
> probably for a lower
> price because they haven't had any development costs. Once that happens 
> I'll probably
> lose my motivation to continue firmware development. And that's what I 
> want to prevent.
> 
>> 
>> ...at the moment I'm side-tracked on getting PCI hardware support into
>> the new user-mode code, but once I get that going, I plan to switch to
>> the 'Bone and start playing with the PRUs.
> Nice, prepare for some sleepless nights then : )
> 
> -- Bas
> 
>> 
>> - -- 
>> Charles Steinkuehler
>> char...@steinkuehler.net
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> 
> 
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