MCC Melody 8-Bit MDFU Client Library

Overview

The MPLAB® Code Configurator Melody 8-Bit MDFU Client Library allows users to configure and generate code to more quickly and easily setup MCUs to utilize a device firmware update process.

Components

• 8-Bit MDFU Client Library in MCC Melody – Allows easy graphical configuration and code generation for bootloader client.
• pyfwimagebuilder - Converts hex files into DFU image format, ensuring compatibility with bootloader requirements for seamless firmware updates.
• pymdfu - Host Application to facilitate the transmission of DFU image to the bootloader client, streamlining the update process.

Features

• Supports UART Communication
• The main requirements for the generated bootloader code are:
  • Determine if a valid end-application is loaded
  • Communicate/Execute supported Commands
  • Erase/Rewrite the end-application memory space
  • Transfer control to the end application

Related Documentation

• Release Notes
• Getting Started Document, API Reference and Update Image Specification
• Provisioning Workflow Example
• Known Issues List

GitHub Examples

• 8-Bit MDFU Bootloader Client Example for AVR128DA48
• 8-Bit MDFU Bootloader Client Example for PIC18F56Q24
• 8-Bit MDFU Bootloader Client Example for PIC16F18446

Changelog

All notable changes to this project will be documented in this file.

[1.5.0] - 2026-03-09

New Features and Improvements

• M8BTL-5095 :- Device support in MDFU Client Library for MegaAVR0 devices

[1.4.0] - 2025-10-21

Bug Fixes

• M8BTL-4915 :- Fix FTP layer to pass correct buffer length to BL_BootCommandProcess
• M8BTL-4755 :- Fix post build step in application for adding configuration bit range

New Features and Improvements

• M8BTL-4691 :- Create an image builder decoding example in the documentation
• M8BTL-4500 :- Update application linker options to use an origin and length for App Linker
• M8BTL-4409 :- Update MISRA checker metadata
• M8BTL-3706 :- API Documentation Improvements
• M8BTL-2848 :- Added documentation to provision public key in the secure element
• M8BTL-2847 :- Support for secure boot and secure DFU in 8-bit MDFU Client Library
• M8BTL-635 :- Support for CRC verification option at boot time

[1.3.0] - 2025-07-02

Bug Fixes

• M8BTL-4416 :- Bootloader core is checking the file version incorrectly
• M8BTL-3667 :- Bootloader (MDFU Library) UART instance is not loading

New Features and Improvements

• M8BTL-4137 :- Refactored linker option section to provide more streamlined experience
• M8BTL-3778 :- Updated the 8-bit MDFU Client Library to automatically align the app start address to the next page boundary
• M8BTL-2850 :- Updated the 8-bit MDFU Client library to support recovery using multiple images
• M8BTL-2849 :- Updated the 8-bit MDFU Client Library to support anti-rollback feature for the application version