On Sunday 21 July 2019 19:31:23 Alan Condit wrote: > Gene, > > The rpi4 is available in 1gb, 2gb and 4gb memory versions ($35, $45, > $55 respectively). > > Alan > IMO the sweet spot is around 2GB.
> > Date: Sun, 21 Jul 2019 15:27:17 -0400 > > From: Gene Heskett <[email protected]> > > To: [email protected] > > Subject: Re: [Emc-developers] LinuxCNC + RPi 4 > > Message-ID: <[email protected]> > > Content-Type: Text/Plain; charset="utf-8" > > > > On Sunday 21 July 2019 13:20:37 andy pugh wrote: > >> On Thu, 18 Jul 2019 at 21:47, Pedro Grijalva > >> <[email protected]> > > > > wrote: > >>> Hi I'Interested on run Linuxcnc on RP4 > >>> can you share the steps ? > >> > >> I have put the SD card image _temporarily_ here: > >> http://www.linuxcnc.org/dists/buster/2.8-uspace/ > >> > >> Note that this is a run-in-place setup, as the debian packaging > >> isn't set up quite right for Raspberry Pi. > >> This means that you need to type this at the command-line to run > >> it. (and yes, it really is dot space dot slash) > >> . ./linuxcnc-dev/scripts/rip-environment > >> linuxcnc > >> > >> (or latency-test to run the latency test) > >> > >> Please only download this if you have a Pi4 and genuinely want to > >> experiment, for the sake of the web site bandwith limits. > > > > I am dl'ing it, and will get a pi4, and whatever card seems to be > > the correct interface. Someone mentioned the 7i76E? but I've doubts > > it can what I am doing. > > > > To dup what I am doing with the 7i90HD and a stack of 7i42TA's, I'll > > need 3 encoders, two stepgens, a pwm with direction for the vfd, two > > in's for homes, and several outs. I don't think the 7i76D's I have > > can supply the 2nd and 3rd encoders for the jog dials. > > > > So what do I use? > > > > A 7i90 with an ethernet connector might work, but what it has is > > rs422, and likely too slow at 10 megabits. OTOH, if it can do spi at > > 50 megabits... Actually I am writing at 42Mb and reading at 25Mb, > > and thats working fairly well under stretch right now. > > > > 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 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
