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Re: [Emc-users] hal 'net' command puzzler
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From: gene h. <ghe...@wd...> - 2012-05-05 22:42:39
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On Saturday, May 05, 2012 06:37:46 PM Jeff Epler did opine: > Are we talking about this documentation? > > http://linuxcnc.org/docs/2.5/html/hal/basic_hal.html#_net_a_id_sub_net_ > a if so, the syntax > net <signal-name> <pin-name> <opt-direction> <opt-pin-name> > doesn't really reflect what "net" will actually accept. I've revised > the documentation to hopefully improve things: > > 1.4 net > > The command net creates a connection between a signal and and one or > more pins. If the signal does not exist net creates the new signal. > This replaces the need to use the command newsig. The optional > direction indicators <=, => and <=> are only to make it easier for > humans to follow the logic and are not used by the net command. > > The syntax and an example: > > net <direction>* <signal-name> <direction>* <pin-name> > (<pin-name>|<direction>)* > > net both-home-y <= parport.0.pin-11-in > > A pin can be connected to a signal if it obeys the following rules: > > * An IN pin can always be connected to a signal > > * An IO pin can be connected unless there’s an OUT pin on the > signal > > * An OUT pin can be connected only if there are no other OUT > or IO pins on the signal > > The same <signal-name> can be used in multiple net commands > to connect additional pins, as long as the rules above are > obeyed. > I think I was in the devel branch, but similar. Right now g76 is waiting forever for the index pulse, which is not good, so I obviously mucked up something. encoder.0.index is visible in hal meter, but G76 can't see it. I think Murphy has taken up residence here, again. 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> A witty saying proves nothing, but saying something pointless gets people's attention. |
