1.17 I2C SMBUS read write

This example application demonstrates how to use the I2C peripheral to exchange data between a device acting as a SMBUS master and SMBUS slave.

Description

This example uses two instances of I2C peripheral. Each instance of I2C is configured as both I2C/SMBUS master and I2C/SMBUS slave. SMBUS master of I2C peripheral instance 1 talks to SMBUS slave of I2C peripheral instance 2. Similarly, SMBUS master of I2C peripheral instance 2 talks to SMBUS slave of I2C peripheral instance 1. The data is exchanged using the standard SMBUS data transfer formats - Write/Read word, Write Bulk, Read Bulk, Write-Read Bulk etc. Each slave always echoes the data it receives from the SMBUS master.

Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/i2c/smbus_master_slave/smbus_read_write/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project NameDescription
pic32mk_mcm_curiosity_pro.XMPLABX project for PIC32MK MCM Curiosity Pro Board

Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project NameDescription
pic32mk_mcm_curiosity_pro.XPIC32MK MCM Curiosity Pro Board

Setting Up PIC32MK MCM Curiosity Pro Board

  • Connect a wire from SDA4 on mikroBUS header J300 to SDA2 on mikroBUS header J301
  • Connect a wire from SCL4 on mikroBUS header J300 to SCL2 on mikroBUS header J301
  • Connect micro USB cable to the 'USB Debug' connector on the board to the computer

Running the Application

  • Build and program the application using its IDE
  • LED is turned ON when the data transfer is successful.
    Following table provides LED names:
    BoardLED Name
    PIC32MK MCM Curiosity Pro BoardLED1