I want to control PWM but I don't know how can I set it.
I use Debian 9.3 I try. ..
echo $index > export
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
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