On Monday 21 June 2021 22:01:25 Leonardo Marsaglia wrote: > Thanks a lot Peter and Andy, > > I re read through the manual and found the SSERIAL port connection and > the recommendation of using a CAT5 cable cut in half. I missed that > part so I was a little confused about how to expand the I/Os. So, I'll > be more than ok with this board :) > Another possibility if you need lots of i/o, is the 7i90HD, which has a total of 72 lines. Firmware options for uo to 8 axises of steppers and encoders. Or I believe pwm-gens and encoders. The disadvantages are its 3, 50 pin i/o's that are all tied to the fpga, and easily damaged by noise. The fix for that is a trio of 7i42TA's which are effectly used as breakout boards, tradeing some bandwidth for the usual surge protection and giving you nice screw terminals to wire it up with. It can be driven from an epp parport, or from an spi port from a pi. With all the gingerbread I've put on the sheldon, I probably have 35 i/o lines unused yet. And I can fire up firefox and browse the net at the same time its running the sheldon. I felt keeping the ethernet port out of the lcnc arena, so the net port was available for updating and such was more important, and still do. 2 of my 4 machines are building and installig their own versions of linuxcnc from github master-gtk3 as I type this, including that rpi4.
> El lun, 21 jun 2021 a las 4:45, andy pugh (<[email protected]>) escribió: > > On Mon, 21 Jun 2021 at 03:27, Leonardo Marsaglia > > <[email protected]> > > > > wrote: > > > Is the 7i75 > > > breakout board the way to add more I/Os to the 7i76E? And in that > > > case I suppose the direction of the I/O pins in determined in HAL > > > at the startup right? > > > > That depends on what you want. If it is just GPIO then look at > > smart-serial boards on the built-in port. > > If that still isn't enough, you could add one or two 7i74 boards to > > the 7i76E for a theoretical extra 3584 extra IO lines.... > > > > (smart serial has been recently expanded from 96 to 224 bits, but I > > am not sure if any available boards actually add more than 48 io > > pins each) > > > > -- > > 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-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > Emc-users mailing list > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
