eniac77/avr128da48-i2c-send-receive-example

This repository contains examples of bare metal source code for I2C. The code examples were developed for AVR128DA48.

AVR128DA48 I2C Send Receive Code Example

This repository provides an Atmel Studio solution with a bare metal code example for a basic I2C communication. This example demonstrates the basic functionality of the TWI peripheral with a basic I2C communication. The device is connected to a digital potentiometer which communicates through an I2C interface. The device sends read commands to the I2C address of the potentiometer. Two read operations are required every iteration since the potentiometer has a 12 bit resolution.

Related Documentation

More details and code examples on the AVR128DA48 can be found at the following links:

• AVR128DA48 Product Page
• AVR128DA48 Code Examples on GitHub
• AVR128DA48 Project Examples in START

Software Used

• Atmel Studio 7.0.2397 or newer (microchip.com/mplab/avr-support/atmel-studio-7)
• AVR-Dx 1.0.18 or newer Device Pack

Hardware Used

• AVR128DA48 Curiosity Nano (DM164151)

Setup

The AVR128DA48 Curiosity Nano Development Board is used as test platform

The following configurations must be made for this project:

TWI0:

• Configured in Master mode
• Baud rate 100000
• Using default pins (PA2 - SDA, PA3 - SCL)
• Idle bus state
• Enable

Operation

1. Open the I2C_example.atsln solution in Atmel Studio

2. Build the solution: right click on I2C_example solution and select Build
   

3. Select the AVR128DA48 Curiosity Nano on-board debugger in the Tool section of the project settings:

• Right click on the project and click Properties;
• Click Tool tab on the left panel, select the corresponding debugger and save the configuration (Ctrl + S)
  

4. Program the project to the board: select I2C_example project and click Start Without Debugging:
   

Summary

This example represents a basic functionality of the TWI peripheral for a basic I2C communication. The device reads the value from a digital potentiometer which communicates through an I2C interface.