It seems that the Luckfox Lyra Zero W cannot set GPIO2(GPIO0_A2) to a high level?
Posted: 2026-03-26 6:37
Buildroot in flash.
I tried the following commands:
Although these commands work for GPIO14 and GPIO55, they have no effect on GPIO2.
When I try to read gpio2/value, it returns 0.
How can I set GPIO2 to output a high level ?
I tried the following commands:
Code: Select all
# echo 2 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio2/direction
# echo 1 > /sys/class/gpio/gpio2/valueWhen I try to read gpio2/value, it returns 0.
Code: Select all
# cat /sys/class/gpio/gpio2/value
0Code: Select all
# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/ff940000.gpio, gpio0:
gpio-2 ( |sysfs ) out lo
gpiochip1: GPIOs 32-63, parent: platform/ff870000.gpio, gpio1:
gpio-32 ( |work-led ) out lo
gpio-46 ( |cd ) in hi IRQ ACTIVE LOW
gpio-53 ( |bt_default_poweron ) out hi
gpio-55 ( |sysfs ) out hi
gpiochip2: GPIOs 64-95, parent: platform/ff1c0000.gpio, gpio2:
gpiochip3: GPIOs 96-127, parent: platform/ff1d0000.gpio, gpio3:
gpiochip4: GPIOs 128-159, parent: platform/ff1e0000.gpio, gpio4:0Code: Select all
# iomux 0 2
mux get (GPIO0-2) = 0