I2C

I2C configuration and setup

Install I2C tools

If not already present, the first step is to install the I2C tools to be able to use the I2C ports.

sudo apt-get update -y

sudo apt-get install -y i2c-tools

Adjust I2C user group

To use the I2C commands without root, you'll need to add the NavQ+ user to the i2c group. To do this, you can run the following command:

sudo usermod -a -G i2c user

sudo su

echo 'KERNEL=="i2c-[0-9]*", GROUP="i2c"' >> /etc/udev/rules.d/10-local_i2c_group.rules

Check the I2C connection

Now to check the connection and confirm that the port is working correctly. Connect something to the I2C JST-GH port, then run the command below. It shoudl show you raw output from most devices connected on the I2C bus(es). Note that the onboard NXP secure element SE05x will not respond to this command.

i2cdetect -y 5

Example

The link below is a 3rd party example that shows the use of I2C from one of the NXP HoverGames participants.

Smart and Sustainable Agriculture SystemHackster.io