I want to control PWM but I don’t know how can I set it.
I use Debian 9.3 I try. …
cd /sys/class/pwm/pwmchip0
index=0
echo $index > export
cd pwm$index
echo 1 > enable
echo 1000000000 > period
echo 500000000 > duty_cycle
but nothing happened . … and how do I know which PWMchip is PWM0A , PWM0B, PWM1A , PWM1B