http://e2e.ti.com/support/arm/sitara_arm/f/791/p/382609/1349287#1349287 <http://e2e.ti.com/support/arm/sitara_arm/f/791/p/382609/1349287#1349287>
Regards, John > On Jun 20, 2016, at 12:00 PM, Stewart <[email protected]> wrote: > > I'm looking to write a simple app for BBB. When started from the command > line, it would set up the ADC in continuous mode and read ~1 M samples from > e.g. AN0 into memory. After the capture is complete, it would write the data > to a file and exit. > > Ideally, it would run at the hardware limit of 1.6 MSPS (15 cycles of 24 MHz > adc_clk per sample). If that's not practical, 800 KSPS or better would be > acceptable. > > What is an easy way to do this? Most Beaglebone ADC examples sample at > kilohertz rates or slower. > > This guide: > http://processors.wiki.ti.com/index.php/Linux_Core_ADC_User%27s_Guide speaks > of 200 KSPS. What is the limitation here? > > I've seen various suggestions to use the PRU, but don't understand why. I > would think that since DMA would be required anyway, there should be no > requirement to otherwise access the hardware with tight timing. If PRU is > indeed necessary, is there a suitable example or tutorial? (None of the > libpruio built-in examples deal with rapid sampling or large amounts of data.) > > Any other ideas for a simple way to capture data fast will be gratefully > appreciated. > > Thanks. > > > -- > For more options, visit http://beagleboard.org/discuss > <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] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/aeaf9852-fb4c-4fd1-9594-8aad0ad5fd3c%40googlegroups.com > > <https://groups.google.com/d/msgid/beagleboard/aeaf9852-fb4c-4fd1-9594-8aad0ad5fd3c%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/30BAF407-1354-4CEC-95DE-BB6A5803AA1E%40gmail.com. For more options, visit https://groups.google.com/d/optout.
