From: <sun19920...@gmail.com> Reply-To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> Date: Monday, July 21, 2014 at 11:08 PM To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> Subject: [beagleboard] How to synchronize ADC sampling clock ？
> Hi, > how to synchronize ADC sampling clock (CLK_M_OSC, in AM335x manual, page 3731) > with external 1PPS source or others? > I used PTP to synchronize system clock in the kernel before, however, the > jitter is about 30us （but I need a jitter with accuracy under 1us.）. > So I want to synchronize ADC sampling clock(24MHz), Is there any way to > synchronize it ? Is the clock of CLK_M_OSC be adjustable? > Thanks. There is no way to do this with Linux because the interrupt latency on the standard kernel is probably somewhere between 100uS and 1mS. If you want 1uS accuracy, then I suggest you use the PRU. Regards, John > -- > 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. > 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. For more options, visit https://groups.google.com/d/optout.
