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BMI270 - C Implementation (I2C) - Version: 0.5

Bare bones BMI270 - C implementation (I2C). This was a project for my practical phase at my University and my first time working hands on with IMUs.

RQX-59G usage

Build application

cd bmi270_c
make

Run application

./main

Usage

Make sure these lines are connected: GND, 3V3, SDA, SCL

If you are using the SparkFun SPX-17353 BMI270 Breakout Board, you can easily connect them using a 1mm 4-pin JST connector cable. (example: Qwiic cables)

Make sure that the device is available at 0x68 or 0x69 i2c address by running this command:

i2cdetect -y 1

The BMI270 requires a config load. This initialization step is necessary to be able to use all its functions.

bmi270_init(&sensor)

A full power cycle is necessary if you want to load the config again.

Check out the main.c for more usage information.

Tested with:

  • Ubuntu 22.04.2 LTS
  • Raspbian 10 - Buster (32 Bit)

Functionality

  • BMI270 integration
  • load config file into BMI270
  • write/read registers
  • a few other functions (check bmi270.h)

Python Version

The BMI270 Python Implementation is also available as a package on pypi.org.

You can install this package using this command:

pip3 install bmi270

Check the README for more information.

Raspberry Pi

For a Raspberry Pi Setup add/change this line in /boot/config.txt to your desired baudrate:

dtparam=i2c_baudrate=400000

Reboot your Raspberry Pi after applying the change.