IO

Definition

Main Module - Core-3588JD4

Main Module - Core-3576JD4

Main Module - Jetson Orin Nano/Jetson Orin NX

Use

For example, to operate "486", you need:

Export the GPIO, run as root user:  echo 486 > /sys/class/gpio/export

Operate GPIO, set to read input or output specified value:  cd
/sys/class/gpio/gpio486 # set input mode echo in > direction cat value
# set output mode echo out > direction # output low level echo 0 >
value # output high level echo 1 > value

There are a few things to note:

If the GPIO has been applied by other drivers, it cannot be exported
successfully, and subsequent read and write operations cannot be
performed.

Involving the multiplexing of IO functions, if the function of the pin
is already GPIO, the above method can be used; otherwise, the pinctrl
state must be specified in the device tree.