pwm-gpio

Linux kernel module for soft pwm on gpio usign high resolution timers.

Usage example

Move a servo motor at 50hz pwm

echo 0 > /sys/class/pwm/pwmchip0/export
echo 20000000 > /sys/class/pwm/pwmchip0/pwm0/period
echo 1500000 > /sys/class/pwm/pwmchip0/pwm0/duty_cycle
echo 1 > /sys/class/pwm/pwmchip0/pwm0/enable