trongphuongpro / elinux_pwm

library for using PWM on BeagleBone Black Rev.C

Support: PWM0, PWM1, PWM2

Requirements

create udev rules (in /etc/udev/rules.d) with following content:

SUBSYSTEM=="pwm", KERNEL=="pwmchip*", ACTION=="add", PROGRAM="/bin/sh -c 'chgrp -R pwm /sys/class/pwm'" SUBSYSTEM=="pwm", KERNEL=="pwmchip*", ACTION=="add", PROGRAM="/bin/sh -c 'chmod -R g=u /sys/class/pwm'"

add uboot overlays for PWM channels open file /boot/uEnv.txt and change:

uboot_overlay_addr4=/lib/firmware/BB-PWM0-00A0.dtbo

uboot_overlay_addr5=/lib/firmware/BB-PWM1-00A0.dtbo

uboot_overlay_addr6=/lib/firmware/BB-PWM2-00A0.dtbo