On Sun, Aug 23, 2015 at 4:06 PM, M@ Dunlap <[email protected]> wrote: > Hello all, I'm trying with increasing desperation to get my BBB (that is > running 4.1.4-1-ARCH) to use a PWM. It used to work, but then I updated > from 3.8 to 4.1 and now it's back to SNAFU. I'm trying to get device trees > to work, but I really, really don't get device tree overlays, I've read all > the guides/docs and am still clueless. > > My current best guess is to first load > https://github.com/ProjectHexapod/bbbStuff/blob/master/overlays/am33xx_pwm-00A0.dts > to activate pwm, and then load > https://github.com/ProjectHexapod/bbbStuff/blob/master/overlays/thigh_bone-00A0.dts > to configure all the pins. Unfortunately when I do that and then try to > echo something into pwmFolder/duty it tells me that the permission is > denied. I also don't understand why those need to be separate device tree > overlays. > > In attempting to isolate the problem I also came up with the following, but > it gives the same permission denied errors. I'm out of ideas, please send > help! Also, even if you don't know how to solve the problem, I'd also be > interested to hear if there are style or high-level problems with my > approach....
pwm works fine, take a look at the bacon cape example we have for 4.1: cape: https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-BONE-BACONE-00A0.dts and the script i used to test the pwm's https://github.com/beagleboard/bb.org-overlays/blob/master/examples/BB-BONE-BACONE/example.sh Regards, -- Robert Nelson https://rcn-ee.com/ -- 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.
