[NUC970/N9H30] GPIO control
Posted: 08 Apr 2020, 08:42
Q: I am trying to access gpio from userspace using /sys/class/gpio entry. But getting following error
A: It's because PA0 and PA1 is configured as LCD pin (multi-function = 0x2) in kernel configuration, not GPIO.
Code: Select all
# echo 0 > /sys/class/gpio/export
Please Check GPIOA00's multi-function = 0x2
sh: write error: Invalid argument
# echo 1 > /sys/class/gpio/export
Please Check GPIOA01's multi-function = 0x2
sh: write error: Invalid argument