Then you would need a powerful analog amplifier, unless it is a control signal for a driver. An analog amplifier waste energy, a more efficient method is to use an inverter card and then you use the PWM module in the micro controller to generate signals for the inverter.
You also need to chose a suitable micro controller, the high end usually are good for hard drives and similar but not for PWM generation. Micro controllers with a Cortex-M* CPU usually have support PWM generation and are more or less built for this purpose, they may be cheap from around $1 each in large quantity and maybe $10-$20 for the more powerful. On Thu, 13 Oct 2016 14:24:54 -0400 Erik Friesen <e...@aercon.net> wrote: > 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 ------------------------------------------------------------------------------ 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
