swisskyrepo
/
HardwareAllTheThings
mirror of https://github.com/swisskyrepo/HardwareAllTheThings.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
HardwareAllTheThings/docs/protocols/i2c.md

904 B
Raw Blame History

I2C

I2C (Inter-Integrated Circuit), pronounced "I-squared-C" or "I-two-C", is a popular communication protocol mainly used for low-speed, short-distance communication in embedded systems.

Analysis

⚠️ Enable I2C on the Raspberry Pi via raspi-config

  • i2c-tools

    sudo apt-get install i2c-tools
i2cdetect -y 1

  • eeprog

    wget http://darkswarm.org/eeprog-0.7.6-tear5.tar.gz
tar -xvf eeprog-0.7.6-tear5.tar.gz eeprog-0.7.6-tear12/
cd eeprog-0.7.6-tear12/
make
sudo make install

  • HydraBus

    i2c1> show pins
i2c1> scan

Read / Write

  • Read: ./eeprog -x /dev/i2c-1 0x50 -16 -r 0x00:0x10
  • Write: echo "hello" | ./eeprog -f -16 -w 0 -t 5 /dev/i2c-1 0x50

References