With the Pi4 its maybe a little bit better. The arm core is connected to the internal AXI bus
https://heise.cloudimg.io/bound/712x480/q70.png-lossy-70.webp-lossy-70.foil1/_www-heise-de_/ct/imgs/04/2/7/4/3/7/8/1/RPi4-Block-16-9-b2166d55211bec78.jpeg but with all older PIs it is technically impossible. The arm core ist just connected to a massage mailbox and the vcode is handling all IO and RAM acces https://www.heise.de/select/ct/2016/8/1460193213013079/contentimages/Raspi_Broadcom_mtk_IG.jpg Markus > Am 20.04.2020 um 19:51 schrieb Sebastian Kuzminsky <seb.kuzmin...@gmail.com>: > > On 4/19/20 1:28 PM, mar...@r-bechtold.de wrote: >> For The Pi it is technically impossible to do Realtime. The Pi thinks >> it dose Realtime but the arm core have no acces to any IO. its all >> handled by the Vcode and nobody know what the vcode is doing. > > The Raspberry Pi4 seems to work well: > > Software stepping using on-board GPIO: > https://www.youtube.com/watch?v=LKjNOVHhHio > > And using a Mesa card: https://www.youtube.com/watch?v=RDKaFJmB254 > > > -- > Sebastian Kuzminsky _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
