On Sun, 2010-10-31 at 13:17 +1100, Frank Tkalcevic wrote: > > For now, > > I am thinking about an EPP to analog output gadget. Since EMC2's software > > stepping runs in the base thread, I know I can get about ten packets into > the > > gadget for each servo period, so realtime functions could be done, though > I > > am thinking of using the analog output for a VFD, realtime would not be > > needed. > > Apart from the parallel port, are there any other real time HAL > interfaces/drivers to a basic I/O, Eg serial port, USB, etc?
EPP and PCI are the only interfaces I know of for realtime I/O, but for my projects, I don't think I need realtime. One reason I am considering the parallel port is cost. A PCI dual port card can be had for $20 or less, a mega chip for $3 to $10, a programmer for $20, add a proto board and some other small bits and you have something that can output or input fast digital signals with high resolution (fast meaning much faster than toggling parport pins). I did learn that the XMega is not compatible with 5 Volt signals, so it would be harder to use with a parallel port. Also, it needs a different type of programmer. So, I'm back to looking at plain mega's. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
