On Monday 27 August 2018 13:38:08 Todd Zuercher wrote: > I have a duel port PCIe parallel port card that I am trying to use in > an application, but I'm having a little trouble. > > My problem is that I can't seem to use the pins in the control groupe > (1,14,16,17) as outputs in the normal "out" or "in" configurations. > When set up as out or in those pins seem to be dead. If I configure > the port in X mode they do work as inputs. I am at a bit of a loss > with what to do. I am afraid that the breakout board I was trying to > use might have messed up the parallel port card, so I'm a little > afraid to plug it into a known good working machine.
I don't recall ever seeing a breakout board that used those 5 input pins for output. The logic path doesn't even exist. And most mesa cards like the 5i25 don't either that I know of. You can, IIRC, set them as outputs in the hal file, but the one time I tried it, nothing came out, so those 5 pins are inputs. The huge majority of the cheap breakouts are even opto-isolated output, which is both a waste of time, and in the case of speed controlling a spindle screws things up with the opto's time lags. Saintmart are the only cheap breakouts that are good for that, no opto's in the outputs at all, but if you have a highcount encoder, you'll have to by pass the input opto's as the encoder can be 10x faster than the opto's. Your clue that the opto's aren't fast enough is when you speed it up, it suddenly goes wide open. As long as what you are doing corresponds to an EPP parport, I'd be surprised if you hurt anything. > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 -- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
