Maybe I can use this module with the regular beaglebone gpio? http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Shift_Register_Port_Expander
Dave On Monday, January 14, 2019 at 2:13:33 PM UTC-7, Dave wrote: > > Hi, > I am working on a cape for basic IO buffering for the step/dir pins and I > also want to use shift registers for the regular input/output. > I am planning on using a 74hc595 on the board for the 8 outputs and a > 74hc165 for the inputs. > I am also going to add a port to allow cascading more of these registers > on add-on board for more IO if needed. > > Now my question is in regards to the hal driver for this. Should I use the > SPI pins/driver to read write the shift registers? I will also need latch > pins in addition to the clock/data lines. > Or should I just bit bang the whole thing? > I don't want to slow down the servo loop too much if possible so I am > looking for advice on what pins/drivers would work the best. > > > > Thanks > Dave > > > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
