1- The pinout of I/O connector
2- Setting and Reading Input Pin
3- Setting Digital Output as High and Low
Hardware: DSBOX-NX2 (Rev. 1.1)
OS: JetPack 4.5 (L4T-32.5)
This blog post is suitable for ;
• NVIDIA Jetson Xavier NX SOM with DSBOARD-NX2 (Rev. 1.1)
• DSBOX-NX2 (Rev. 1.1)
In this blog post, we will test the IIO (Industrial Input Output) interface of DSBOX-NX2.
First, let's look over the IO connector. On the connector, there are 3 isolated outputs, 2 isolated inputs, and 1 isolated ground. When using IIO, always double-check which ground pin you are using. You must use the isolated ground for IIO applications.
Find sysfs equivalent of the connected input pin from the table. For this setup it is gpio-232. After proper hardware connection, we can continue with the software side.
Set gpio232 (DIGITAL_IN0) as input and read sensor value. To do this, you should use the commands below.
sudo echo 232 > /sys/class/gpio/exportsudo echo in > /sys/class/gpio/gpio232/directionsudo cat /sys/class/gpio/gpio232/value
Find sysfs equivalent of the connected output pin from the table below. For this setup it is gpio-236. After proper hardware connection with industrial LED, we can continue with the software side.
Then set gpio236 (DIGITAL_OUT0) as output and control light state. To do this, you should use the commands below.
sudo echo 236 > /sys/class/gpio/exportsudo echo out > /sys/class/gpio/gpio236/direction
To short Output
sudo echo 1 > /sys/class/gpio/gpio236/value
To open Output
sudo echo 0 > /sys/class/gpio/gpio236/value
Thank you for reading our blog post.