JetsonGPIO(C++)

A C++ library that enables the use of Jetson's GPIOs
(Jetson TX1, TX2, AGX Xavier, and Nano)

This is a very simple C++ Jetson GPIO Library written by Jueon Park(pjueon).
It's an unofficial port of the NVIDIA's official Jetson GPIO Python library to C++. (https://github.com/NVIDIA/jetson-gpio)

The library provides almost same APIs as the the NVIDIA's Jetson GPIO Python library.

But it DOESN'T support all functionalites of the NVIDIA's original one.

Tested on Jetson Nano and Jetson TX2

Installation

Clone this repository, build it, and install it.

git clone https://github.com/pjueon/JetsonGPIO
cd JetsonGPIO/build
make all
sudo make install

After installation, you can build your program like this.

g++ -o your_program_name your_source_code.cpp -lJetsonGPIO 

Setting User Permissions

In order to use the Jetson GPIO Library, the correct user permissions/groups must
be set first. Or you have to run your program with root permission.

Create a new gpio user group. Then add your user to the newly created group.

sudo groupadd -f -r gpio
sudo usermod -a -G gpio your_user_name

Install custom udev rules by copying the 99-gpio.rules file into the rules.d
directory. The 99-gpio.rules file was copied from NVIDIA's official repository.

sudo cp JetsonGPIO/99-gpio.rules /etc/udev/rules.d/

For the new rule to take place, you either need to reboot or reload the udev rules by running:

sudo udevadm control --reload-rules && sudo udevadm trigger