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

• How to Scan and Detect I2C Addresses - Carter Nelson

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