On Friday 22 January 2021 14:10:22 Ralph Stirling wrote: > I really don't know yet how much work it would be to > port STMBL to the Pico. A stock STMBL drive, with > an STM32F405VG processor has four analog inputs > (as far as I can tell). Those are 12bit, and can be scaled > in stmbl's local hal. I haven't investigated the sampling > rate for those conversions. The STM32F4xx processors > have a lot more analog inputs available, but teasing out > which ones don't conflict with needed digital i/o, and how > to route them inside the stmbl code is more than I've done. > The Pico pinout seems to indicate only 3 analog inputs.
Thanks Ralph, but all my mills are 4 axis. And the pico is probably too slow for that to be used as servo feedback anyway. So do carry on. Its an interesting discussion for sure. > -- Ralph > ________________________________________ > From: Gene Heskett [ghesk...@shentel.net] > Sent: Friday, January 22, 2021 10:38 AM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Another Mesa vhdl question (STMBL summary > with added pico-pi?) > > > What comparison can be made between the very limited, fixed scale A-D > conversion of a mesa card's 1st 4 inputs on say a 7i76, and the A/D > speed and scaling that $4 pico-pi might be able to do when running the > STMBL code, and how fast could it do it? > > Having those figures at hand would determine just how usefull the > pico-pi might be. > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
