Deep Dive on SAM E70 Xplained Pro Evaluation Kit
This tutorial describes the basic steps to create a MPLAB® Harmony Graphics Suite application without using a Harmony Board Support Package (BSP) or Graphics Template.
This tutorial describes the basic steps to create a MPLAB® Harmony Graphics Suite application without using a Board Support Package (BSP) or Graphics Template. The tutorial uses the SAM E70 Xplained Ultra Evaluation Kit. It starts with a new MPLAB® Harmony project and finishes with a graphics application equivalent to aria_quickstart.
The instructions in this tutorial assume that you have already installed following software:
- MPLAB® X Integrated Development Environment v5.15 or later
- MPLAB® XC32/32++ C Compiler v2.20 or later
- MPLAB® Harmony 3 Configurator
The instructions also assume that you have acquired following hardware:
- SAM E70 Xplained Ultra Evaluation Kit
- Display Module (choose one)
- Standard USB A to micro-B cable
To install MHC, follow the Harmony V3 MHC installation guide. Upon completion, proceed to Configure Hardware.
SAM E70 Xplained Ultra board configuration is simply a board to PC connection using a standard USB A to micro-B cable. The connection provides power and debug communication. The connection is illustrated in the image below:
- Disconnect the ribbon cable that connects the display to the interposer board. The board is for the MEB 2 only, and not used on the SAM E70 Xplained Ultra kit
- Release the ribbon cable from the interposer board
- Release the black clamp on the E70’s J2 connector and turn the display over
- Insert the ribbon cable into J2 and close the clamp
The board and display are powered by a Micro B – USB A cable from PC to the “Debug USB” port on the E70 board.
Launch the MPLAB® X IDE From the File pull-down menu:
- Select New Project. This will display the New Project dialog window
- Proceed to Creating New Project Tutorial Steps
Choose Project
In Categories window:
- Click Microchip Embedded In Projects window
- Click 32-bit MPLAB® Harmony Project
- Click Next
If 32-bit MPLAB® Harmony Project is not visible repeat software installation steps Install MHC above.
Framework Selection
- Set Framework Path: to your Harmony v3 root installation directory. This path is not set by default. You must enter the path used at installation
- Select Convert to Relative Path for Configuration
- Click Next
The Launch Framework Downloader button is used to download or configure a local framework. Because you have already installed H3, this button click is not required.
Project Settings
- Set Location: field to
deep-dive. This will create a directory for your deep-dive application - Set Folder: field to
sam_e70. This will be the name of the MPLAB® X project folder configured for SAM E70 - Set Name: field to
app-deep-dive. This will be the name of your application displayed in MPLAB® X - Click Next
Configuration Settings
- Set Name: field to
sam_e70. This will create a sam_e70 folder for configuration settings - Select for Device Family: drop down,
ATSAM - Select for Device Filter:
same70. This optional step helps narrow the possible device target selections to only this family - Select for Target Device: drop down,
ATSAME70Q21B - Click Finish
The selection of Target Device ATSAME70Q21B is required. The device name will enable the listing of the supported BSP specific for this board later in this tutorial. Using a different device may not give any selections for the BSP.
When Finish is clicked, the following message may be displayed while the configuration database setup dialog is loaded.
Configuration Database Setup
- Select the following packages to load into the project:
gfx,core, andbsp - Deselect all other packages
- Click Launch
When Launch is complete, the Project Graph will display the following default components:
Make Harmony Core Connections
Because this is a Harmony based application, you will need to use the Harmony Core Service Component.
Under Available Components:
- Expand Harmony
- Click Core When prompted to activate FreeRTOS
- Click No
You will also need the Time System Service.
A Harmony component will list its Current Consumers and Available Consumers when a right click occurs on the its circle icons.
- Right click the Core Service icon on Harmony Core Service component
- Select Available Consumers
- Select TIME
- Click the TMR icon on TIME System Service component
- Select TC0
Make Graphics Connections
Because this is a GFX enabled application, you will need to select a graphics library. For this tutorial, we will use Aria. Under Available Components, expand Graphics>Middleware>Aria and double click Aria.
- Right click the GFX HAL icon on Aria component
- Select Satisfiers
- Select GFX Core
- Right click the Display Driver diamond icon on the GFX Core component
- Select Satisfiers
- Select LCC
- Right click the SMC_CS diamond diamond icon on the LCC component
- Select Satisfiers
- Select SMC_CS0
On completion, your Project Graph window should look similar to the following image:
Make Touch Connections
This is a touch enabled application. You will need to use the MaXTouch Controller. Under Available Components, expand Input/Touch and double click MaXTouch Controller. MaXTouch component will need an I2C driver, and the I2C driver will need the TWIHSO peripheral. Setup the Satisfiers for each.
- Right click the Input System Service icon on MaxTouch Controller component
- Select Satisfiers
- Select Input System Service
- Right click the DRV_I2C icon on maXTouch Controller component
- Select I2C
- Right click I2C icon on I2C component
- Select TWIHSO
- Right click touch panel on maXTouch Controller component
- Select PDA TM4301B
If the display needs to be configured, then you will need to launch Display Manager. For this tutorial, Display Managing is not required. See Getting started with Display Manager for more information.
- Right click the Graphics Display icon on PDA TM4301B component
- Select GFX Core
You will need to tell Aria that touch is to be enabled:
- Select Aria
- Click Configuration Options
- Expand Code Generator Options
- Select "Enable Input Event Interface?"
The final Project Graphics should is illustrated below:
Pin Settings
Using the SAM E70 schematic obtained from the users guide, the following PINs are required for successful hardware communication. Note: the drv_maxtouch and drv_gfx_lcc drivers require specific names for its pins. If you do not have the correct pin names a compiler output will display an error along with the expected name.
The final pin settings are as follows:
Create a UI design using the new project wizard
When MHGC’s Welcome Dialog is displayed:
- Click the Create a new project using the new project wizard button
If the Welcome Dialog does not appear, it is because it had been disabled previously. The Welcome Dialog can be re-enabled by using MHGC’s File > Settings > General menu:
- In the MPLAB® Harmony Graphics Composer (MHGC) screen use the left-most icon to create a new graphics design.
In the New Project Wizard, for the Color Mode step:
- Select
RGB_565 - Click NEXT
For the Memory Size step, It is not recommended to change this setting for this tutorial:
- Click NEXT to accept the default Flash Memory Size
For the Project Type step:
- Choose the second option create a new project using a basic template
- Click NEXT
Generate Compile
Generate the application’s code for the first time:
- Select the Generate Code button of MHC’s window
Save the project’s configuration.
- Enter for File name:
sam_e70 - Select
USER_ALLas the Merge Strategy
- Click Generate:
Now the project’s initial software has been configured.
NOTE: Here is a brief explanation of the different merge strategies that are available:
- ALL: The user will be prompted with a merge window for all generated files. This includes files that have no user modifications but are changed because of changes in MHC configuration or component updates. (This choice is always the safest.)
- USER_ALL: The user will always be prompted with a merge window for all generated files that contain user modifications.
- USER_RECENT: The user will be prompted with a merge window for all generated files that contain recent user modifications.
- OVERWRITE: All generated file content will be replaced by the contents of this generate operation. All user changes will be overwritten.
A compilation error could occur if a pin name is undefined.
Program and Run
Project Properties dialog. Right mouse click on the project’s name and bring up the Project Properties dialog
- Under Hardware Tool, select
EDBG - Under Compiler Toolchain, select XC32 compiler
V2.20 - Click OK
Run Main Project
- Select Run Main Project. This button will build, program, and run the application
Observe Display
The demonstration will display the following UI:
