In this scenario, the dac would be driving a bldc, so it would need to be updated around 4-8khz.
On Thu, Oct 13, 2016 at 2:24 PM, Erik Friesen <e...@aercon.net> wrote: > To clarify my question, I am trying to understand at what level lcnc > accesses hardware peripherals. For example, suppose I build a board with > an spi dac peripheral to the arm, as well as write the kernel driver, if > necessary. What type of glue do I need to provide in this situation? > > On Thu, Oct 13, 2016 at 1:50 PM, Nicklas Karlsson < > nicklas.karlsso...@gmail.com> wrote: > >> On the Cortex-M* model usually used on micro controllers there use to be >> a reference manual. Usually there is register to configure pin >> functionality, GPIO is a common default value and a register to select >> direction input or output. >> >> There use to a library but software complexity become lower by accessing >> the registers directly unless there is a need to change things dynamically. >> The libraries are usually written for dynamic access while software almost >> always only have need for simpler static access. To register callback >> functions at an interrupt handler is a perfect example, if the same >> function(s) is registered at every startup they could be added statically >> and it is possible to generate a call graph. >> >> >> On Thu, 13 Oct 2016 13:27:55 -0400 >> Erik Friesen <e...@aercon.net> wrote: >> >> > Resurrecting this thread, can anyone point me to docs, or other info >> what >> > it takes to link GPIO, or SPI devices into linuxcnc on an arm? On what >> > level does this happen? Userspace, Kernelspace, etc? I have done a >> bit of >> > kernel programming for the i.mx6. >> > >> > On Thu, Mar 24, 2016 at 8:19 AM, Ron Ginger <rongin...@roadrunner.com> >> > wrote: >> > >> > > I was helping a commercial screw machine shop that had a couple little >> > > KX1 mills. One was getting rather tired after 5 or 6 years of >> production >> > > use and having repeatability problem. I was speaking with the general >> > > manager and asked "well how long do you expect a machine to last?" and >> > > without a hint of a smile he whipped back "40 years" >> > > >> > > The KX1 was installed less then 50 feet from a row of screw machines >> > > maybe as old as I am (73 years) and they were clanking away dropping >> > > parts into a bin. >> > > >> > > ron ginger >> > > >> > > > Who wants to use and maintain (if it is possible) an original CNC >> control >> > > > made prior to 2000 ?? >> > > > >> > > > Dave >> > > > >> > > >> > > >> > > ------------------------------------------------------------ >> > > ------------------ >> > > Transform Data into Opportunity. >> > > Accelerate data analysis in your applications with >> > > Intel Data Analytics Acceleration Library. >> > > Click to learn more. >> > > http://pubads.g.doubleclick.net/gampad/clk?id=278785351&iu=/4140 >> > > _______________________________________________ >> > > Emc-users mailing list >> > > Emc-users@lists.sourceforge.net >> > > https://lists.sourceforge.net/lists/listinfo/emc-users >> > > >> > ------------------------------------------------------------ >> ------------------ >> > Check out the vibrant tech community on one of the world's most >> > engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> > _______________________________________________ >> > Emc-users mailing list >> > Emc-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/emc-users >> >> ------------------------------------------------------------ >> ------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
