Matt Shaver wrote: > On Mon, 2009-08-17 at 12:55 -0500, Jon Elson wrote: > >> Ahh, some new news! Torsten Koschorrek, the rtai ARM maintainer, has >> volunteered to do an rtai port for the Cortex-A8! >> But, he is tied up right now, and won't be able to dig into it until >> next month. Still, that actually sounds pretty good, could be a LOT >> faster to have an expert working on it than the opposite - like me. So, >> there are two possible paths, here : >> >> One is to have rtai, but they seem to be stuck with a 2.6.20 kernel, >> which sounds awfully old. I wouldn't be surprised to find there is NO >> Beagle Board kernel that old. >> > > I haven't shipped the Beagle Board to you yet (general > procrastination/laziness/distractions, etc.). Should I send it to this > other guy instead? It sounds like, from this: > > http://mail.rtai.org/pipermail/rtai/2009-August/021925.html > > that their main holdup is hardware to work with. > > I'm not sure. There are now two people expressing interest, both out of the US, I think. Torsten is not going to have time to dig in for a little bit. And, I'm not too sure of the other guy's abilities or dedication to this project. Somebody not real familiar with the internals of RTAI would find this a hard project to dive right into, I would think. Meanwhile, I might get one running in user mode to start developing a parallel port emulator (mostly a bidirectional 8-bit port with 1.8 - 5 V logic level conversion and a little wrapper code to make it look as close to the PC parallel port as I can.) I really can't even begin to look at interfacing EMC2 to anything until I have a parallel port of some sort to work with.
>> Another is to use the just-developed rt-linux patch from France to the >> 2.6.29 kernel. But, I don't know if there are any problems with using >> rt-linux. I gather we haven't used rt-linux for some years, now. I >> seem to recall there was extremely primitive support for printing >> messages and such from the kernel space. >> > > Is this a patch for the ARM arch? If so, it might be a quicker way to > go, assuming the rtlib support for rtlinux still works. > Yeah, that was the question I asked a couple days ago. I don't think anyone has used the rtlib stuff in a LONG time. The patch is for a 2.6.29 kernel on the Beagle Board, specifically! So, you had some version of Ubuntu running on the Beagle? How big an SD / MMC card did you get? Looking around, pretty much the largest MMC card I could find was 2 GB, is that enough for Ubuntu and EMC2? Also, there are several flavors of memory cards supported, are there performance differences in these? Compared to modern hard drives, these things look like they might have mediocre performance, like 20 mbits/second transfer rates. I didn't even realize these things were either 1 or 4 bits serial. Thanks, Jon ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
