Embedded Computing and Mechatronics with the PIC32 Microcontroller

Chapter 13

I²C Communication

Abstract

This chapter describes the PIC32’s inter-integrated circuit (I²C) communication peripherals. The PIC32 can be a master or a slave and communicate with one or more devices over a two-wire I²C bus. This chapter explains the I²C protocol, how the PIC32 special function registers (SFRs) are used to transmit and receive data, and provides sample code for the PIC32 to act as an I²C master, an I²C slave, and to communicate with an accelerometer and an OLED screen.

Keywords

Inter-integrated circuit (I²C)

OLED screen

I²C bus

Two-wire bus

Each of the PIC32’s four inter-integrated circuit (I²C, pronounced eye-squared-see) peripherals allows it to communicate with multiple devices using only two pins. Many devices ...