On Sunday 12 May 2013 10:08:08 Kent A. Reed did opine: > On 5/12/2013 6:02 AM, Lars Andersson wrote: > > The symbol <==> is new to me. > > Lars: > > '<=>' denotes bidirectional signal flow and is the symbol intended to > correspond to IO pins as opposed to IN or OUT pins. > > Remember, though, the quote from the docs in my earlier message---these > direction-indicator symbols are merely a convenience to the user. They > don't communicate any information to LinuxCNC. > > The reason I get downright pedantic about this point is that we users > are so used to the symbols we forget they may lie to us. If the HAL > configuration file was generated by LinuxCNC from a loaded configuration > then the symbols are correct according to the component declarations > known to HAL. If the file was generated by a user using an editor then > they may or not be correct. It won't matter to HAL when the file is > parsed (although the actual pin connections will) but it would confuse a > user who tries to make sense of the file. > > But you've already solved your problem, which is the important part of > this thread. > > Regards, > Kent
Generally, in carving up my own .hal files, I've found that when setting up a "net" line, I can more easily parse it mentally later if I treat that line as net(tab)arbitrary-signal-name(tab)source-pin(tab)destination-pin(tab)destination-pin Where the (tab)destination-pin can be repeated as needed to send a signal several places. I can go back 6 months later and still figure out what I was doing. Because linuxcnc ignores all those <==> thingies, adding those can quickly become confusing, just count tabs instead. 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> QOTD: "You want me to put *holes* in my ears and hang things from them? How... tribal." A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
