Torsten Koschorrek, the ARM maintainer for RTAI has informed me he has an RTAI patch ready for the Beagle Board. He is working on a 2.6.29 kernel, but hasn't uploaded the latest docs for it yet. That should happen in a couple days, he says. So, if anyone wants to try out this patch kit, there is a SourceForge project at http://sourceforge.net/projects/rtai-cortex/
I have an adaptor board that plugs onto the Beagle that does a software emulation of an EPP parallel port. For just bidirectional PP use, there are two extra bits that enable the external bidir driver/level translators and set the direction of the data port. I have to draw up some documentation on how to control all this from a C program. I have figured out how to set up the GPIO pins on the OMAP from C, and should document that, too. One interesting thing that I discovered about the OMAP is that the GPIO logic is apparently multiplexed, and the pins are updated every 250 ns (on the older 500 MHz Beagle, I suspect the newer ones may be faster.) This is not much of a concern for software step pulse generation, but is a limit for talking to an FPGA over the "parallel port". Jon ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
