Try the "cycle counter" in the pru. look in the pru section of the forum
On Thu, Jul 17, 2014 at 10:35 PM, <[email protected]> wrote: > I use BeagleboneBlack with Debian, kernel v3.15, and I want to implement > an accurate timer on my BBB. > I use clock_nanosleep() to wait for 1 second. However, it always turns to > be 1 second and 100~120 microsecond delay. (I measured clock_nanosleep() > between clock_gettime() and with oscilloscope.) > > I also run linuxPTP (a software that adjusts system clock, CLOCK_REALTIME, > to synchronize linux system with PTP.) to synchronize my BBB. > > I have no idea how to improve it, should I change linux to real-time > linux? (Xenomai or RobertCNelson's patch for linux) > or is there another way (such as software, codes, etc) to get more > accuracy timer? (under 1us delay.) > > Thanks! > > -- > 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 [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- John Stampfl -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
