On Fri, Feb 16, 2018 at 1:39 PM, Co M <[email protected]> wrote: > FIXED. > PWM, Beagle Bone > > Meanwhile I got an answer at: github.com cdsteinkuehler > beaglebone-universal-io > Though, I used the SDcard, the u-boot @ 2016 from eMMC took over. I dd-it > and wipe it. > > > For: EHRPWM1A P9_14 > the sys file is: /sys/class/pwm/pwmchip3 > echo 0 > export > > > > EHRPWM1B P9_16 > the sys file is: /sys/class/pwm/pwmchip3 > echo 1 > export > > > > cd /sys/class/pwm/pwmchip3 > echo 0 > export > echo 1 > export > echo 20000 > pwm0/period > echo 10000 > pwm0/duty_cycle # P9_14 > echo 1 > pwm0/enable > > echo 20000 > pwm1/period > echo 10000 > pwm1/duty_cycle # P9_16 > echo 1 > pwm1/enable
Be careful, "pwmchip3" is not set in stone, and can move between reboots/kernel/etc... For P9_14/P9_16 go thru: /sys/devices/platform/ocp/48302000.epwmss/48302200.pwm/pwm/pwmchip*/ When you look at: /sys/class/pwm/pwmchip3/ you see it symlinks back to above.. 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYg-tn-2GUbzoJ2P_vy6MSQ1Ur6a66kWQ4h_B2F3kgqi0w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
