Difficulty accessing gpio via sysfs interface

[AnotherPeople]

Hello community armbian :).

I have a trouble on orange pi plus2e armbian mainline kernel. 

There is no reaction of the pins after the export.

echo 11 > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio11/direction
echo 1 > /sys/class/gpio/gpio11/value

and physical pin not responding... keeping the voltage around 1.2v, when reading the same thing. 

I think that the physical and virtual numbering of contacts is different.

And excuse me for my english...

[Igor]

http://linux-sunxi.org/GPIO#Accessing_the_GPIO_pins_through_sysfs_with_mainline_kernel

[martinayotte]

Be aware that pin numbering mentioned in Igor's link is important for all AllWinder SoC.

This mean that the gpio11 you've tried is actually PA11, and beware also that pins can have multiple usages, and here PA11 could be TWI0_SCK if you have loaded I2C mainline overlay or having I2C enabled in legacy FEX.

 

[AnotherPeople]

Thank you very much.