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User's Guide
Atmel START to MPLAB Harmony 3 Migration Guide
Introduction
This document describes the different steps to consider when porting an embedded application from Atmel
® START
to the MPLAB® Harmony 3 framework. It covers the following migration aspects:
How to create a MPLAB Harmony 3 project under MPLAB X IDE and navigate through the MPLAB Harmony
Configurator (MHC).
How to identify different elements that compose a project under Atmel START.
How to port the system/driver/middleware configuration using MPLAB Harmony Configurator.
Important aspects to consider when porting the project application layer.
To illustrate these aspects, this document references the example available on AtmelSAM D21 IO1 Xplained demo
START. Prior starting the migration process, ensure that the following prerequisites are met:
Internet connection with access to https://start.atmel.com
Latest version of MPLAB X IDE https://www.microchip.com/mplab/mplab-x-ide
Latest version of MPLAB Harmony 3 https://github.com/Microchip-MPLAB-Harmony
SAM D21 Xplained Pro board (optional)
I/O1 Xplained Pro board (optional)
© 2019 Microchip Technology Inc. DS70005413A-page 1
Table of Contents
Introduction.....................................................................................................................................................1
1. Creating MPLAB Harmony 3 Project Under MPLAB X IDE.................................................................... 3
2. Identifying the Resources Used in the Atmel START Project..................................................................8
3. Porting Driver Configuration from Atmel START...................................................................................13
4. Porting the System PINMUX Configuration from Atmel START............................................................19
5. Porting the System Clock Configuration from Atmel START.................................................................26
6. Porting and Adapting Middleware......................................................................................................... 35
7. Porting the Application Source Code.................................................................................................... 38
The Microchip Website.................................................................................................................................41
Product Change Notification Service............................................................................................................41
Customer Support........................................................................................................................................ 41
Microchip Devices Code Protection Feature................................................................................................41
Legal Notice................................................................................................................................................. 41
Trademarks.................................................................................................................................................. 42
Quality Management System....................................................................................................................... 42
Worldwide Sales and Service.......................................................................................................................43
User's Guide
© 2019 Microchip Technology Inc. DS70005413A-page 2
1. Creating MPLAB Harmony 3 Project Under MPLAB X IDE
The first step in this process is creating a MPLAB Harmony 3 project under MPLAB X IDE. This new project will
enable access to the MPLAB Harmony 3 Configurator (MHC), and access the list of software modules, such as
peripheral libraries, services and middleware, which are available for the target SAM device.
Figure 1-1. MPLAB Harmony 3 Configurator Available Components
To create a project for the SAM D21J18A device, follow these steps:
1. Launch MPLAB X IDE.
2. In MPLAB X IDE, select (or click the New Project icon).File > New Project
3. In the New Project window, under Steps, select Choose Project, and then under Choose Project section,
select these options: for Categories select Microchip Embedded, and for Projects select 32-bit MPLAB
Harmony 3 Project.
Note:  If the option 32-Bit MPLAB Harmony 3 Project is not available, users need to install the MPLAB
Harmony 3 Configurator plug-in by selecting Tools > Plugins > Available Plugins before continuing with this
demonstration. MPLAB Harmony 3 Configurator overview is available for download at https://
microchipdeveloper.com/harmony3:mhc-overview.
User's Guide
Creating MPLAB Harmony 3 Project Under MPLAB X ...
© 2019 Microchip Technology Inc. DS70005413A-page 3

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Modell: PIC32CM2532JH01064

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