Re: [Emc-users] Adding parallel port
On Saturday, July 30, 2011 08:11:13 AM Farzin Kamangar did opine: > Hello EMC users, > I have difficulty when adding additional parallel ports (other than > the parallel port on mother board) and configuring them as input. When > I monitor the pins 2 to 9 they are > always off, but the pins 10 or 11 are on. I do not have this problem > when I configure the parallel port on the mother board as input. Pins 2 > to 9 on the parport on mother board > are all on and they turn off when connect them to ground (They are all > O.K.) Could you tell what I need to do to make pins 2 to 9 act > correctly on the additional parports too. > I do not have any problem when configuring additional parports as > output.Thanks and regards > Farzin There are parport cards that do not properly do the mode emc uses, Rosewill being one of them. I have on hand another card, a PCI1P from StarTech.com according to the box that claims all 3 of the common modes are supported. However, as in all things that require I pull the emc computer off its high shelf in the shop, it has not been actually tested. Perhaps others here have also found a card that works reliably? I believe EPP is the magic acronym. You didn't say what brand your card is, so I can't go much farther. Please post the snippet from an lspci -v that represents your add-in card. Cheers, gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Science is what happens when preconception meets verification. -- Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Adding parallel port
2011/7/30 gene heskett : > > I believe EPP is the magic acronym. EPP mode is only for communication with external I/O hardware, like Mesa cards. Farzin, You should check, if that add-in card supports data input on pins 2-9. AFAIK not all do. Viesturs -- Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Adding parallel port
On Sat, 2011-07-30 at 16:34 +0430, Farzin Kamangar wrote: > Hello EMC users, > I have difficulty when adding additional parallel ports (other than the > parallel port on mother board) and configuring them as input. When I monitor > the pins 2 to 9 they are > always off, but the pins 10 or 11 are on. If the parallel port in question indicates that ECP, EPP or Bi-directional is supported, then my guess is that input on pins 2-9 should work. One problem might be that for input, you may need a pull up resistor on each input pin to pull the pin up to 3 or 5 volts. Then have your input device sink the pin to ground for the active state. Most PCI cards I have seen are 5 volt compatible. Size the resistors to be greater than the sinking current limit of the input device, so the device will not try to sink more current than it can handle (V=IxR, ie 5=.003xR or 5/.003 = 1.6kOhms). The parallel port input pin should not sink or source much current, but you may need to use diodes to protect against reverse voltage (series blocking) and/or over voltages or spikes (Zener shunt). I am not an expert on this so the above should just give you a start on do your own research. These links might be handy: http://www.beyondlogic.org/spp/parallel.htm http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware (See section "PCI and PCIe Parallel Port Cards") Posting more details of your parallel port card and what it is connected too, might help us to give better advise too. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Adding parallel port
Viesturs Lācis wrote: > 2011/7/30 gene heskett : > >> I believe EPP is the magic acronym. >> > > EPP mode is only for communication with external I/O hardware, like Mesa > cards. > Farzin, You should check, if that add-in card supports data input on pins 2-9. > AFAIK not all do. > Pico Systems boards also need the EPP mode. But Viesturs is right, EPP is NOT needed for general purpose I/O for auxiliary control, step pulse output and similar connections. It would be quite surprising if anything with a PCI connection did not support bidirectional mode. It is possible that some oddball brand might not use the standard register layout for controlling the input/output mode selection. It is also possible that some boards, when in EPP mode, may ignore the in/out command bit, so you should set the board for PS/2 (bidir) mode. How to set PCI plug-in boards for a default mode varies by make. Some have an EPROM on the board that can be set by a program (like SIIG). Jon -- Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
