在 2010-03-10三的 23:53 -0600，Jon Elson写道： > 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
Hi Jon, It's really a good news! I'll try it. I create an open source OMAP3530 board project too, and the core board is working now. I'll design a carrier board running this patch and EMC and use it for my carving machine. Here is my project web site, http://code.google.com/p/openomap/ Regards, Yanjun Luo. ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
