Can you ask a more specific question ? It seems as though as you;re asking if you can use the sysfs file system to control USR0-USR3 ? The answer is yes, you can, but it largely depends on which drivers you're loading with your hardware. Using /dev/mem/ + mmap all you need to know if the memory map for the GPIO pins. But for sysfs access, you need to load certain drivers at boot.
On Wed, May 3, 2017 at 11:19 PM, michael c <abrax...@gmail.com> wrote: > i really thought i would find this online someplace but, > can i use the trigger and heartbeat type functions on a LED connected to > GPIO on my custom board based on the BBB design? > this would save me time in my code that is already quite busy. > i noticed some example from 3.14 kernel days > i'm 4.4.62 and ubuntu 16.04 > and controlling them from c code. > > thanks so much, > Michael > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/beagleboard/2cd59eb1-ec6f-4c29-a548-072ba0633aee%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/2cd59eb1-ec6f-4c29-a548-072ba0633aee%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORq-qjC62rrD6yoo-W5twFWsdGN%2BrhXDPNSxDduPTEiayw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
