On Monday 14 September 2020 17:55:47 Peter C. Wallace wrote: > On Mon, 14 Sep 2020, Gene Heskett wrote: > > Date: Mon, 14 Sep 2020 17:40:36 -0400 > > From: Gene Heskett <ghesk...@shentel.net> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> > > To: emc-users@lists.sourceforge.net > > Subject: Re: [Emc-users] Setting up two home switches on Y > > > > On Monday 14 September 2020 17:16:36 andy pugh wrote: > >> On Mon, 14 Sep 2020 at 20:52, Gene Heskett <ghesk...@shentel.net> > > > > wrote: > >>> One of the rules for the net command is that only the first of > >>> that name in your hal file, is allowed to be an input. > >> > >> That's not true. They can be allocated in any order, but only one > >> pin in the net can be a "writer". All the others must be readers. > >> (except for the bidirectional index-enable pins) > > > > I got bit by that, and was told that, probably a decade back. Now I > > guess it either does pay attention to the arrow pairs, or looks at > > arg2 to see if its input or output? > > > > Cheers, Gene Heskett > > The arrows dont do anything nor is the order of any importance > > In fact there is no issue with making an undriven signal (all hal > input pins) Though I believe one of the hal file parsing utilities can > check for undriven signals > > AFAIK signals are stored in memory locations that connected hal input > pins read from and hal output pins write to (so more than one writer > is disallowed) > Thank you Peter. > > Peter Wallace > Mesa Electronics > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
