AVR128DB48 I2C_Host Example Component for CNano Explorer: Find all I2C Clients on Bus (Callbacks, Printf-errors)

The I²C Host Find all Clients Example, of the MCC Melody I²C Example Component (for the Curiosity Nano Explorer), is used here in the Callbacks implementation, with the Printf with error handling visualization.

In this example, an I²C write is attempted for all possible I²C client addresses to identify clients that respond with an ACK. This builds up a list of valid I2C_Client addresses on the bus, displaying this as a printf message over the Universal Asynchronous Receiver and Transmitter (UART). The example uses a polled implementation.

As each address is attempted in the Prinft with Error Checking visualization output, an Acknowledge (ACK) or No-Acknowledge (NACK) message is printed over the UART.

When using the MPLAB® Data Visualizer, after configuring the Terminal to a baudrate of 115200 and clicking to 'display as text in the terminal' he example will display as follows.

The following image of the MPLAB Data Visualizer shows the application running on the Curiosity Nano Explorer board, where ten client devices have been found:

Setup

The following outlines the complete MCC Melody configuration, including all the selected tasks that have been implemented in this example, as seen in the MPLAB Code Configurator (MCC) Melody Builder.

MCC Melody Example Components

Example Components are a tight integration of learning material directly into MCC. This allows users to conveniently place the configuration instructions side-by-side to the components they are configuring. For more information, refer to the MCC Melody Example Components introduction.

Related Documentation

• MCC Melody I²C Example Component (for the Curiosity Nano Explorer)

• MCC Melody Design Patterns for Control Flow

• Curiosity Nano Explorer User Guide

• AVR128DB48 Data Sheet

Software Used

• MPLAB® X IDE v6.25 or newer

• MPLAB® XC8 v3.00 or newer

• MPLAB® Code Configurator (MCC) Plug-in Version v5.6.2 or newer (Tools>Plugins>Installed, search: "MCC")

• MPLAB® Data Visualizer Plug-in Version v1.4.1926 or newer (Tools>Plugins>Installed, search: "Data Visualizer")

• MCC Melody I2C_Host Example Component for the Curiosity Nano Explorer 1.0.0 or newer

• MCC Core v5.8.2 or newer

• Single Page Application (SPA) Host v1.0.0 or newer

• MCC Melody Core v2.9.1 or newer

Open the MCC Content Manager to verify the MCC Core and MCC Melody Core versions.

Hardware Used

• AVR128DB48 Curiosity Nano (EV35L43A)
• Curiosity Nano Explorer (EV58G97A)