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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)

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

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 ...

Figure 1-2. Creating an MPLAB Harmony 3-Based New Project

4. Click .Next

5. Select Framework Selection, and under Manage Framework section, enter Framework Path (Path to the folder

in which the MPLAB Harmony 3 packages are downloaded). For this demonstration, the MPLAB Harmony 3

packages are already downloaded at D:\microchip\github\h3.

Figure 1-3. New Project - Framework Selection

6. Click .Next

7. Select Project Settings, and under Name and Location section enter MPLAB Harmony 3 new project details:

– Location: Indicates the path to the root folder of the new project. All project files will be placed inside this

folder.

– Folder: Indicates the name of the MPLAB X IDE folder.

– Name: Enter name of the project. This name will be shown in the MPLAB X IDE.

– Path: It is read-only box. It will update as and when users make changes to other entries.

User's Guide

Creating MPLAB Harmony 3 Project Under MPLAB X ...

Figure 1-4. New Project Wizard Step 3

8. Click .Next

9. Select Configuration Settings, and then enter details as given below:

– Name: Enter the configuration name.

– Target Device: Choose a device name.

10. Click .Finish

Figure 1-5. New Project Wizard Step 4

The new MPLAB Harmony 3 project will be launched.

Note: After clicking the Finish button, if MHC does not launch, the user can launch it by selecting Tools > Embedded

> MPLAB® Harmony 3 Configurator from the menu bar of the MPLAB X IDE.

User's Guide

Creating MPLAB Harmony 3 Project Under MPLAB X ...

Figure 1-6. New MPLAB Harmony 3 Project

The software modules associated with the project configuration are seen by selecting Tools > Embedded > MPLAB

Harmony 3 Configurator.

Figure 1-7. Accessing MPLAB Harmony 3 Configurator

The associated MPLAB Harmony 3 Configurator list will be displayed as shown in the figure below.

User's Guide

Creating MPLAB Harmony 3 Project Under MPLAB X ...

Figure 1-8. MPLAB Harmony 3 Configurator - Available Component List

User's Guide

Creating MPLAB Harmony 3 Project Under MPLAB X ...

2. Identifying the Resources Used in the Atmel START Project

Before porting the application, users need to identify the software modules that compose the application. As both

Atmel START and MPLAB Harmony 3 frameworks provide a graphical configuration interface, hence it is simple to

identify the different drivers and middleware modules that are used by the application and compare them to the

available MPLAB Harmony 3 modules.

Figure 2-1. Atmel START Graphical Configuration Interface

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Figure 2-2. Harmony 3 Graphical Configuration Interface (MHC)

Note: Some applications include additional software functions or middleware that are not part of Atmel START.

Therefore, it is important to review the full application flowchart or project architecture to identify them.

Follow these steps while using the SAM D21 I/O1 example from Atmel START as a reference.

1. In Atmel Studio 7, open the Atmel START project to be ported by selecting Project > Re-Configure Atmel Start

Project.

User's Guide

Identifying the Resources Used in the Atmel ...

Figure 2-3. Reconfiguring Atmel START Project

Note: The project can also be opened by loading its file at ..atstart/.atzip https://start.atmel.com/

Atmel START main window showing Load Project tab is displayed.

Figure 2-4. Load Project From a File Under Atmel START

2. When project is loaded, click on the Dashboard tab and identify the Atmel START drivers and its configuration.

User's Guide

Identifying the Resources Used in the Atmel ...

Figure 2-5. Driver Identification Under Atmel START

3. Check the application code and application flowchart to identify whether any additional services and

middleware are required. The figure below illustrates the SAM D21 I/O1 flowchart.

Figure 2-6. Additional Service Middleware Identification Using a Flowchart

Main

Atmel Start Init

Temperature Sensor

init

UART init

ADC Enable

Delay ms

Read temperature

Read light from ADC

Print information

System Delay ms

required

Printf / STDIO redirect

4. If MPLAB Harmony Configurator is not opened, from MPLAB X IDE open the MPLAB Harmony 3 Configurator

by selecting Tools > Embedded > MPLAB Harmony 3 Configurator.

User's Guide

Identifying the Resources Used in the Atmel ...

Figure 2-7. Accessing MPLAB Harmony 3 Configurator

5. Search for software module availability in Harmony 3 Configurator, and then drag and drop it into the Project

Graph window.

Figure 2-8. Identifying Software Module in MHC

The table below provides the drivers and middleware used for this demonstration.

User's Guide

Identifying the Resources Used in the Atmel ...

Table 2-1. Drivers and Middleware

ATMEL START Module Harmony 3 Module

Drivers IO1_LIGHT_SENS ADC

I2C SERCOM2

EDBG_COM SERCOM3

Systick (implicit) SYSTEM > SYSTICK

Middleware AT30SE75X None

STDIO Redirect STDIO

Note: Specific development is required for AT30SE75X. Other drivers, system services, and middleware are

available under MPLAB Harmony 3.

User's Guide

Identifying the Resources Used in the Atmel ...

3. Porting Driver Configuration from Atmel START

To port a driver from Atmel Studio to MPLAB Harmony 3 is a straightforward operation as it relies on the comparison

of Atmel START and MPLAB Harmony Configurator Graphical interfaces.

Figure 3-1. Atmel START to MPLAB X Driver Support

Follow these steps for the SAM D21 I/O1 Xplained demonstration:

1. Add peripheral library (drivers) to the MPLAB Harmony 3 project by dragging them from the Available

Component list to the Project Graph section.

Figure 3-2. Add Peripheral Driver from the Available Component List

2. Configure all the MPLAB Harmony 3 peripheral libraries according to their equivalent driver in Atmel START.

Note: Specific Atmel START driver configurations can be seen by clicking individually on each of the driver

component in the application dashboard interface.

User's Guide

Porting Driver Configuration from Atmel ST...

Figure 3-3. Access Driver Configuration in Atmel START

– ADC peripheral Library (IO1_LIGHT_SENS) configuration.

User's Guide

Porting Driver Configuration from Atmel ST...

Figure 3-4. Port ADC Driver Configuration

– SERCOM3 peripheral Library (EDBG_COM) configuration

User's Guide

Porting Driver Configuration from Atmel ST...

Figure 3-5. Port SERCOM3 Driver Configuration

– SERCOM2 peripheral Library (I2C) configuration

User's Guide

Porting Driver Configuration from Atmel ST...

Figure 3-6. Port SERCOM2 Driver Configuration

– SYSTICK Service configuration

Figure 3-7. Enable Service Under MHC

After generating the project source code from the MHC interface by clicking or selecting MHC >

Generate Code, the peripheral libraries (PLIBs) configuration can be found in the following project directories:

User's Guide

Porting Driver Configuration from Atmel ST...

Figure 3-8. Generated MHC Project Architecture

PLIBs

headers

PLIBs

sources

The API function definition used by the application can be found in the peripheral library header files.

Figure 3-9. Peripheral Libraries API Location

User's Guide

Porting Driver Configuration from Atmel ST...

4. Porting the System PINMUX Configuration from Atmel START

Porting an application PINMUX configuration from Atmel Studio to MPLAB Harmony 3 is a straightforward operation

as it relies on comparison as each framework graphical interface offers similar capabilities.

Figure 4-1. Atmel START and MHC Pin Configuration Interface Comparison

Follow these steps for the SAM D21 IO1 Xplained demonstration:

1. In Atmel START, click on the tab and identify which I/O pins are configured and used in thePINMUX

application.

User's Guide

Porting the System PINMUX Configuration from ...

Figure 4-2. Identify I/O Pins Configuration Under Atmel START

Note: The configuration of each pin is available by clicking on it in the PINMUX configurator table.

Figure 4-3. Identify I/O Pins Configuration Under Atmel START (Continued)

2. In MPLAB X IDE, select MHC > Tools > Pin Configuration to open the project pin configurator interface.

User's Guide

Porting the System PINMUX Configuration from ...

Figure 4-4. Accessing MHC Under MPLAB X

Note: The following tab in the MHC interface enables the customization of the application pin configuration.

Figure 4-5. Accessing Pin Configuration Windows Under the MHC

3. Port the I/O pin configuration from Atmel Studio to the MHC Pin Setting tab.

– SERCOM 2 I/O settings

User's Guide

Porting the System PINMUX Configuration from ...

Figure 4-6. SERCOM 2 I/O Settings

– SERCOM 3 I/Os settings

User's Guide

Porting the System PINMUX Configuration from ...

Figure 4-7. SERCOM 3 I/O settings

– ADC I/Os settings

User's Guide

Porting the System PINMUX Configuration from ...

Figure 4-8. ADC I/O Settings

4. Verify that the MHC pin diagram is aligned with the initial Atmel START project pin diagram.

Figure 4-9. Pin Configuration Verification

After regenerating the project source from the MHC interface by clicking , the port initialization routine

executed during program initialization can be found in the following project files. This initialization routine is

automatically generated by the MHC according to the user configuration entered in the graphical interface.

User's Guide

Porting the System PINMUX Configuration from ...

Figure 4-10. MHC Generated Pin Configuration

Note: During application run-time, the PORT configuration can be changed by calling APIs from the MPLAB

Harmony 3 PORT PLIB.

User's Guide

Porting the System PINMUX Configuration from ...

5. Porting the System Clock Configuration from Atmel START

The porting of an application clock configuration from Atmel Studio to MPLAB Harmony 3 is a straightforward

operation as it relies on the comparison of both framework graphical interfaces which offer similar capabilities.

Figure 5-1. Atmel START and MHC Clock Configuration Interface Comparison

1. In Atmel START, click the tab and identify different clock elements used in the application and theirPINMUX

settings.

User's Guide

Porting the System Clock Configuration from ...

Figure 5-2. Identify Project Clock Configuration Under Atmel START

Note: Additional information on the settings for a specific clock element can be retrieved by clicking on the

associated blue gear wheel button.

Figure 5-3. Access Clock Element Settings Under Atmel START

2. To open the project pin configurator interface, in MPLAB X IDE, select MHC > Tools > Clock Configuration.

User's Guide

Porting the System Clock Configuration from ...

Figure 5-4. Access Clock Configuration Interface Under MHC

3. Port each clock component configuration from Atmel START to the MHC Clock view.

– 8 MHz Internal Oscillator (OSC8M)

User's Guide

Porting the System Clock Configuration from ...

Product specificaties

Merk:	Microchip
Categorie:	Niet gecategoriseerd
Model:	PIC32CM2532LE00064

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