On Wednesday 28 November 2018 10:25:40 Peter C. Wallace wrote: > On Wed, 28 Nov 2018, Gene Heskett wrote: > > Date: Wed, 28 Nov 2018 10:16:07 -0500 > > 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] For PCW > > > > On Wednesday 28 November 2018 06:31:30 andy pugh wrote: > >> On Wed, 28 Nov 2018 at 04:26, Gene Heskett <ghesk...@shentel.net> > >> wrote: > >> > >> And that brought cr1 back on, and an attempt to run LCNC now shows > >> two > >> > >>> gpio's as serial tx and rx, but doesn't show anything that from my > >>> understanding, should be there on that subcircuit. And should > >>> there not be 2 such on adjacent pins pairs, a total of 3 per 7i76? > >> > >> If the HAL pins show as TX and RX and have not reverted to GPIO > >> then that means that they have found the 7i76 smart-serial channel. > >> > >> You won't see the other ones without a smart-serial remote on the > >> 7i76 expansion connection. > > > > Hmm, makes sense. > > > >> The 7i76 field-IO doesn't show in dmesg. You should see it with > >> halcmd show pin. > > > > I hadn't considered that, thanks. And it works. Lots and lots of > > i/o. Saved and printed. Should be helpfull but will need translation > > from gpio-nn to tb-#-# to use. Go feed the missus and input some > > more coffee and get to it, starting with getting the other bob for > > 5i25-p2 powered. Looks like this will get me going as soon as > > another standoff kit gets here, promised tomorrow evening. The box > > is 3" tall, so I'll mount the cards about 2" high, and take all the > > cableing to the machine out under the boards, so the terminals are > > not buried in wire. And I'll have a kajillion of these to fix: > > > > twopass: Error in file ./GO704fast.hal: > > setting parameter 'hm2_5i25.0.gpio.007.is_output' to 'true' > > parameter or pin 'hm2_5i25.0.gpio.007.is_output' not found > > > > Hmmm, ack that printout, it almost exist, but is_output does not, > > only invert and open_drain. Since that is also the stepgen #3 step > > output, that line can be nuked in favor of an open_drain, which is > > how I've driven the steppers anyway. > > The 7I76's 5 step/dir outputs are buffered 5V signals so open_drain is > not appropriate, invert is typically not used either because you have > differential pairs for each of the 7I76's 5 step/dir signals so you > just choose the correct (+ or -) output for the type of drive you have > (or swap +,- outputs for diffentially driven drives)
Of which I have none, so we scope them and use the correct polarity... okay. My encoder inputs are ttl level so one side only does it, athough the encoder is push pull on all 3 sigs, implying that a little box with rs485-ttl conversions in it could go away at the expense of some stranded cat-5 exiting another teeny mid cable box, but the ttl works so that can be an afterthought. Cleanup maybe? The lack of being capable of bidir on its gpio's reduces my inputs to a max of 21, 16 in the 7i76 ad 5 on the std bob. Might get crowded, we'll see but the 3 from the encoder won't come out of that, so that helps, a lot. For gpio inputs I'll probably do like I did on the 7i90 on the pi/sheldon, I started from the top, gpio.071 and worked down, so the uncommited stuff was always in the middle, and thats worked well, I've not had to move anything to add another in/out circuit. > > I take it the ability to change a gpio's direction was lost in the > > 7i76? Abd I just discovered that none of the 7i76 stuffs made it to > > the save all output. I guess I'll toss these printouts and make the > > pin file with screen copy pasted to geany, which added 60 more lines > > to the printout. > > > > Laborious, but I'll get there. > > > > Thank you Peter. Now for that 2nd cuppa. And feed the missus. Then > > make more coffee, this is yesterdays leftovers. :) All done, but I had a bowl of cereal too so I'll see about a sugar driven nap next. -- 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) 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
