Hi sgamu,
Can you please give this experiment results to check if pin is actually toggling when it is GPIO:
- Do not use pin as PWM, keep it gpio
- short Pin 31 and 32 on 40-pin header
- echo 424 > /sys/class/gpio/export
- echo 416 > /sys/class/gpio/export
- echo out > /sys/class/gpio/gpio416/direction
- echo in > /sys/class/gpio/gpio424/direction
- echo 1 > /sys/class/gpio/gpio416/value
- cat /sys/class/gpio/gpio424/value
##measure voltage at pin 32, it should be 3.3V - echo 0 > /sys/class/gpio/gpio416/value
- cat /sys/class/gpio/gpio424/value
##check voltage at pin 32, it should be 0V
Repeat from step 7 for 3-4 times.
Let me know the results.