Gene, My problem isn't the breakout board per say. It is that this wonky PCIe parallel port card isn't pulling up the input pins in Linux (it does in Windows).
I can make this breakout board work by adding a 3.3 or 5v pullup to the parallel port side of the opto (I've tested it and I know that does work.) I'm asking here if anyone has a clue what it might take to make the parallel port work as it should in Linux? (like it does in Windows) So that I won't have to add the pull ups or buy a different breakout board. Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -----Original Message----- From: Gene Heskett <[email protected]> Sent: Wednesday, October 31, 2018 1:49 PM To: [email protected] Subject: Re: [Emc-users] Parallel Port Problems On Wednesday 31 October 2018 10:13:51 Todd Zuercher wrote: > I am trying to use a PCIe duel parallel port card and I'm having some > trouble with it. It uses a Moschip 9865 according to lspci-v. I have > 2 different breakout boards, one is a CNC4PC C10 board and it works > perfectly fine with this parallel port card. The other one is one of > those cheap 5 axis boards targeted for Mach3. > Step one step up the rickety ladder that parport BoB's an replace that one with a Sainsmart. It has nice solid outputs w/o any opto's to screw you with making pwm-generators non-linear as hell, and if you have really high resolution encoders, the opto's in the 5 inputs are easy to trace and bypass. Well worth the extra 5 bucks USD. > My problem seems to be that with Linuxcnc this parallel port card > defaults to a mode where none of the input pins (10,11,12,13,15) are > pulled up internally. That isn't a problem with the C10 because it > has it's own pull ups for all the inputs. But it is a problem on the > cheap board which has no pull ups on those pins. The outputs all seem > to work fine. My stuff all has pullups, but I believe the Sainsmart has its own pullups. I'm rigged so output true = logic 0 for everything. > It isn't that this parallel port card can't pull up those pins. When > I test the port in Windows it does pull up the input pins up to 3.3v, > and the cheap breakout will work there. So there must be some magic > setting that can make it work. Does anyone have a clue what it might > be and how to use it in Linuxcnc? You might have to use the in-not signal from your interface card if it has such a critter. > > I also can't seem to make the card work in X mode in Linuxcnc, which > makes me think that It isn't using SPP and is defaulting to EPP or ECP > modes. Is there a way to try to force a parallel port into SPP mode? > (I ask this hoping that forcing the ports into SPP will make the > inputs pull up.) > > I did see on the forum that some have worked around this problem > simply by adding pull ups to input pins on these cheap breakout > boards. But since this parallel port is in fact capable of pulling up > those pins in Windows, I was hoping a way could be found to do it in > Linux, and thus avoid having to get out the soldering iron. > > Todd Zuercher > P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php> > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- 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> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
