By default the outputs of the 8255 are pulled high by a 100K resistor. Jumper W1 will flip that. See pages 3-11,12 of the manual.
Dave On May 3, 2008, at 7:27 AM, <[EMAIL PROTECTED]> wrote: > > Hi Dave. Fascinating experiment. The ax driver is intended for a > 48 IO ISA card but .... I'd hook up a switch to one of the inputs > and see if it changes in the HAL. If it does then we can look into > that iioo config stuff and see if we can expand. I'd try the > switch on several of the inputs. One for each set of 8 inputs. > You need pull up or pull down resistors depending on the nature of > your board. > > In my early experiments with this stuff I was able to lock up the > PC while doing some of this stuff. Don't be surprised if your's does. > > Rayh > > --- [EMAIL PROTECTED] wrote: > > From: "Dave Keeton" <[EMAIL PROTECTED]> > To: "Enhanced Machine Controller (EMC)" <emc- > [EMAIL PROTECTED]> > Subject: Re: [Emc-users] 8255 driver > Date: Sat, 3 May 2008 09:08:23 -0400 > > Make that 48 I/O points instead of 56.... > > > ----- Original Message ----- > From: "Dave Keeton" <[EMAIL PROTECTED]> > To: "Enhanced Machine Controller (EMC)" <emc- > [EMAIL PROTECTED]> > Sent: Saturday, May 03, 2008 8:57 AM > Subject: Re: [Emc-users] 8255 driver > > >> So here is what I have done.....(Recommended by another user) >> >> The pci_8255 showed up in both components and >> functions >> but nothing in pins under Hal Configuration. So I commented it out >> and did >> this....... >> In the m5i20_io.hal file - >> loadrt hal_ax5214h >> cfg="0x220_iiooiioo" (Copied >> from demo_mazak) >> Now I show 56 I/O points in Hal Configuration and Hal >> Meter under >> pins.....Does this mean it worked I assume? Do I have to modify >> the driver >> to get the remainder of the I/O points in pins? Do I need to go >> ahead and >> hook up a switch or led to confirm? >> >> Thanks, >> Dave >> >> ----- Original Message ----- >> From: "Kirk Wallace" <[EMAIL PROTECTED]> >> To: "Enhanced Machine Controller (EMC)" <emc- >> [EMAIL PROTECTED]> >> Sent: Friday, May 02, 2008 10:31 PM >> Subject: Re: [Emc-users] 8255 driver >> >> >>> On Fri, 2008-05-02 at 21:36 -0400, Dave Keeton wrote: >>>> So I have installed the PCI-DIO-96 board in the computer.....Ubuntu >>>> picked >>>> it up in the Device manager and called it by name.....How do I >>>> go about >>>> loading the pci_8255 hal driver, What file do I modify in the >>>> config >>>> directory, How do I know if EMC2 sees the board and its I/O points? >>>> >>>> Dave >>> >>> If you look in the Integrator's Manual: >>> >>> http://www.linuxcnc.org/docs/EMC2_Integrator_Manual.pdf >>> >>> chapter four indicates that the [HAL] section of the .ini file >>> for the >>> configuration you are running, has an entry(ies) called "HALFILE =". >>> These "HALFILE ="'s will list the .hal files that are part of the >>> initialization for starting your configuration in EMC2. One of these >>> files will have "loadrt somedriver and_options" in it. You will >>> need a >>> loadrt entry for your 8255, plus an entry to add the driver to a >>> thread, >>> something like "addf somedriver name_of_thread". You can do a >>> Find for >>> addf in the manual to get more information. If you start EMC2 and >>> if the >>> driver loads properly, you should be able to start Halmeter and >>> see the >>> new Hal pins in the pin list. >>> >>> -- >>> Kirk Wallace (California, USA >>> http://www.wallacecompany.com/machine_shop/ >>> Hardinge HNC/EMC CNC lathe, >>> Bridgeport mill conversion, doing XY now, >>> Zubal lathe conversion pending >>> Craftsman AA 109 restoration >>> Shizuoka ST-N/EMC CNC) >>> >>> >>> -------------------------------------------------------------------- >>> ----- >>> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >>> Don't miss this year's exciting event. There's still time to save >>> $100. >>> Use priority code J8TL2D2. >>> http://ad.doubleclick.net/clk;198757673;13503038;p?http:// >>> java.sun.com/javaone >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> >> >> >> --------------------------------------------------------------------- >> ---- >> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference >> Don't miss this year's exciting event. There's still time to save >> $100. >> Use priority code J8TL2D2. >> http://ad.doubleclick.net/clk;198757673;13503038;p?http:// >> java.sun.com/javaone >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save > $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http:// > java.sun.com/javaone > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save > $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http:// > java.sun.com/javaone > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
