For Jetson Nano develop kit, I used R32.3.1 for Jetson Nano, and saw device tree file is tegra210-p3448-0002-p3449-0000-b00.dts
I used standard BSP: JetPack_4.3_Linux_JETSON_NANO downloaded from SDK manager, tried to test GPIO for pin 33 on Expansion Header.
I used function as:
echo 38 > /sys/class/gpio/export
echo in > /sys/class/gpio/gpio38/direction
echo 38 > /sys/class/gpio/unexport
I monitored the value on terminal when typing “cat /sys/class/gpio/gpio38/value”.
I expected that the value should be changed from 0 -> 1, if I short pin 33 and pin 34, but it’s not.
The returned value for “cat /sys/class/gpio/gpio38/value” just keeps “0”.
Please feel free to let me know if I got misunderstanding. Thanks a lot.