Yes, I have 2-3 suggestions where the first suggestion may not work, but are worth attempting.
- Upgrade to an RT kernel. - Use /dev/mem/ + mmap() - Bit bang via a PRU - Or write a kernel driver that does all this from kernelspace, but writes data to a file userspace hass access to. On Tue, Aug 2, 2016 at 3:17 PM, Kirk <kirkmitcatw...@gmail.com> wrote: > All, > > I'm working on a Beaglebone Black project using a MEMS accelerometer chip, > the ADXL312. > > The accelerometer has a pin which goes active each time a new data sample > is available to be read. > It runs at 3200 Hz. (about 1/3 of a ms per sample) > > The pin is connected to a GPIO input and I've written code to monitor this > pin and grab the data each time. > The sampling normally runs for several seconds continuously. > > The problem is, every once in a while Linux gets busy and apparently > interrupts my code and I miss samples. > (an overrun bit lets me know this is happening) > > > I'm looking for ideas on how to improve this so data samples are not > missed. > > Any ideas? > > Kirk > > -- > 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/564cb216-36a0-4528-874c-f89053d61876%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/564cb216-36a0-4528-874c-f89053d61876%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/CALHSORpCjghcxUpi05Wxx8ak-SF22tsLQk5WfUSQaJrsB-FJ_Q%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
