On Tuesday 24 November 2020 05:53:25 [email protected] wrote: > > > Mesa cards should work here? > > > > > > https://www.elektor.de/raspberry-pi-compute-module-4-io-board > > > > Possibly, but if you want to plug a Pi in to something and run Mesa > > firmware then a normal Pi + 7C80 is probably a better option than a > > compute module and that board. > > I would think latency should be much better than vie ethernet?
That's one of the reasons I'm using a 7i90HD, driving it with spi. The disadvantage is that in a 5 volt i/o environment, a triplet of 7i42TA's are needed to protect the 3.3 volt 7i90HD. That was the only Mesa board when I bought the broken and bent remains of this old 11x56 Sheldon. But they also give you those neat little green screw terminals to do your wiring from, instead of figuring out how to make a breakout board work with 50 pin scsi cables. And it doesn't need any "hats", this is a direct connection between the pi and an 80 yo Sheldon lathe. That, and the 7i90HD gives you i/o to throw away, 72 pins total. Having enough i/o to let your imagination out to play w/o a chaperon is nice so I have quite a list of goodies on that old Sheldon. No hand cranks, I drive it with encoder dials. All machine power is controlled by LinuxCNC. And I still have 30+ unused i/o lines. I recently converted its stepper drives to these new 3 phase servo's driven as steppers, so now I have to listen to Casper the ghost as it moves twice as fast as before. And if they make a mistake, it stops the machine. Rigid tapping, curves w/o a compound. Stuff it never dreamed of doing when it was new is now routine. Sweet is not an adequate word. > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > _______________________________________________ > > Emc-developers mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-developers > > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers 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-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
