EPP mode is a completely different way of using the pins of the parport than the regular SPP mode. In SPP, you have programmatic control over the values on the output pins, and you can read all the input pins.
In EPP, those pins are driven by an additional piece of logic in the parport controller. The driver software asks the EPP controller to read and write addresses on the EPP bus, and the controller twiddles the pins to implement the software's request, according to the datalink protocol described by the EPP spec. So in order to do anything interesting/useful with the EPP port, you need a second driver that knows what registers to read and write on the device on the EPP bus. Simply switching the port to EPP mode doesn't accomplish anything. Maybe i'm missing something in your request? On Apr 9, 2012, at 12:17 , sam sokolik wrote: > I am throwing this out as I have run across a few people that have had > issues with EPP mode and the printer port. Now onboard parallel ports > can usually bet set to epp mode in the bios. Onboard printer ports > usually require some sort of utillity to put them into EPP mode. > > Now if I remember correctly - there was some issues a few months ago > with EPP mode and some intel atom boards. Now again - if I recall > correctly - the parallel port code for the mesa 7i43 was modified so > that it would force the parallel port into EPP mode. (if it could) > > Now - could this code be added to the hal_parport as an option? > > something like > > loadrt hal_parport cfg="0x278 0x378 in 0x20A0 out epp" > > I have not looked yet (and don't know if I can figure it out) but I > thought if someone felt ambitious... (and I might be remembering wrong) > > thanks > sam > ------------------------------------------------------------------------------ > For Developers, A Lot Can Happen In A Second. > Boundary is the first to Know...and Tell You. > Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > http://p.sf.net/sfu/Boundary-d2dvs2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- Sebastian Kuzminsky ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
