Debugging PWM GPIO

This section describes how to debug PWM GPIO:

Execute the following to configure the PWM channel:
```
cd /sys/class/pwm/pwmchip0
echo 0 > export
```
Execute the following to configure the PWM period:
```
cd pwm0
echo 5000000 > period
```
Execute the following to configure the PWM duty cycle:
```
echo 1000000 > duty_cycle
```
Use an oscilloscope to measure the corresponding pin and check the PWM period and duty cycle.

Note:
A duty cycle is the fraction of one period in which a signal or system is active.