A custom C API for instrumenting Jetson TX1’s SoM and SoC with the use of userspace I2C and sysfs files. This is small C library for accessing two Jetson TX1’s INA3221 – current and voltage monitors as well as on-module temperature sensors and other information such as GPU, CPUs and EMC operating frequencies – either through sysf nodes or userspace I2C. The current version has been tested on the Jetson TX1 module with a SKU 699-82180-1000-100 obtained with i2cdump -y -r 0x14-0x26 2 0x50 b command.

In order to build and install the library and sample programs use the following commands.

mkdir build
cd build
cmake ..
make
sudo make install
sudo ldconfig

cd build
watch -n 1 ./jtx1inst_demo -b
sudo watch -n 1 ./jtx1inst_demo -bm

In order to generate documentation from sources annotated with Doxygen use the following command in doc directory.

cd doc
doxygen config
xdg-open html/files.html

This is free and unencumbered software released into the public domain. For more information, please refer to the LICENSE file.