IO

Definition

Main Module - Core-3588JD4

Name	GPIO Number	IO Type
IO1	36	INPUT
IO2	102	INPUT
IO3	44	INPUT
IO4	38	INPUT
IO5	137	OUTPUT(relay)

Main Module - Core-3576JD4

Name	GPIO Number	IO Type
IO1	127	INPUT
IO2	125	INPUT
IO3	129	INPUT
IO4	126	INPUT
IO5	128	OUTPUT(relay)

Main Module - Jetson Orin Nano/Jetson Orin NX

Name	GPIO Number	IO Type
IO1	397	INPUT
IO2	391	INPUT
IO3	453	INPUT
IO4	486	INPUT
IO5	441	OUTPUT(relay)

Use

For example, to operate 486, you need:

1. Export the GPIO, run as root user:

   echo 486 > /sys/class/gpio/export
   

2. 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.