Hi, I've followed you procedure fairly carefully, and everything seems to work fine, except I can't get a signal on an oscilloscope. I've had this working fine in the old 3.8 kernel, and am trying to get the pwms working in the latest 4.1.13-bone16 kernel.
Have you verified it actually works on the output pin? Erik On Monday, October 26, 2015 at 7:00:51 PM UTC-7, rka...@gmail.com wrote: > > Chris, > > This is a custom overlay that I created based on other overlays. I have > not tested this *exact* overlay, since it is extracted from the larger > overlay that matches my additional hardware (about 20 discrete inputs and 2 > quadrature encoders). In the end, I think the standard overlays work, but > the difficulty is how different the Linux 4.1 kernel is from 3.8 with > regard to the bone manager. I'm running Ubuntu Linux on my beaglegone: > > ubuntu@arm:~$ uname -a > Linux arm 4.1.6-ti-r15 #1 SMP PREEMPT Fri Sep 11 02:38:50 UTC 2015 armv7l > armv7l armv7l GNU/Linux > > When I started adding support for the eqep peripherals for the quadrature > encoders, I did run into hardware conflicts where my pin muxing was > failing, and "dmesg | tail" was telling me all along that my overlays were > not loading (and what the conflicts were). As an embedded software > engineer, I understand pin muxing and SOC peripherals, but dealing with the > idiosyncrasies of embedded Linux is where I find it difficult. The trick > is to check that what you are telling the system in your overlay is > actually happening, and this where checking the 'slots', 'pins', and > 'dmesg' is really helpful. > > When I get a spare moment, I'll isolate the PWM portion of the overlay and > complete end-to-end test and post the results. > > On Friday, October 23, 2015 at 8:09:33 AM UTC-5, lariv...@gmail.com wrote: >> >> Can you confirm that this works? >> >> I had this loaded before but there was no solution to be found. Is this >> overlay a custom overlay you made or something you found from someone else? >> I don't believe this overlay is provided with the actual BeagleBone. >> >> By the way, what OS are you running with kernel 4.x? >> >> Thanks again, >> >> Chris. >> >>> >>> >> -- 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.
