The project uses a draw surface widget as a container to draw the gauge needle using lines. When the user touches the screen, a touch event is sent to the application. The application updates the values of the tachometer, speedometer and fuel gauge. The needle is cleared and redrawn every time the tachometer value changes. The speed, distance and fuel gauge are also updated. Label widgets are used to show the speed and distance, while image widgets are used to show the indicators and fuel gauge. 

Demonstration Features 

aria_dashboard_9x60_sk_wvga 

• LCDC display controller with multiple HW layers 

• GFX2D Graphics Processor Unit (GPU) 

• Input system service and driver 

• Time system service, timer-counter peripheral library and driver 

• I2C driver 

• 32-bit RGBA8888 color depth support 

• Draw surface, image, label widgets 

• Software-based image rotation 

• Backlight PWM control 

The Project Graph diagram shows the Harmony components that are included in this application. Lines between components are drawn to satisfy components that depend on a capability that another component provides. 

Adding the “SAM 9x60 Evaluation Kit BSP” and “Aria Graphics w/ PDA TM4301b Display” Graphics Template component into the project graph will automatically add the components needed for a graphics project and resolve their dependencies. It will also configure the pins needed to drive the external peripherals like the display and the touch controller.

The parent directory for this application is gfx/apps/aria_dashboard. To build this application, open the IAR project at: gfx/apps/aria_dashboard/firmware/aria_db_9x60_ek_tm5000.eww. Once IAR is launched simply build the application to produce the harmony.bin image. Copy harmony.bin to a FAT32-formatted SD card. The SD card must also contain the supplied bootloader binary needed to boot Harmony applications. Insert the card to the SDMMC1 port on the board 

The SAM 9x60 build environment is similar to SAMA592. For more building information, see: Getting started with Harmony 3 on the SAMA5D2. 

The following table lists configuration properties:

For aria_dashboard_9x60_sk_ wvga, this solution requires the IAR Embedded Workbench to build. In the IAR workbench, open the workspace from gfx_apps\apps\aria_dashbord\firmware\<workspace>.IAR and build it. Refer to the table below for the appropriate workspace name for your set up. 

The build will generate a binary file harmony.bin. Copy harmony.bin to a FAT32-formatted SD card. The SD card must also contain the supplied bootloader binary needed to boot Harmony applications. Insert the card to the SDMMC1 port on the SAM A5D2 Xplained Ultra board. 

Note: This application may contain custom code that is marked by the comments "// START OF CUSTOM CODE ..." and "// END OF CUSTOM CODE". If you use the MPLAB Harmony Configurator to regenerate the application code, do not remove or replace the custom code. 

The final hardware set-up should be: 

Connect the ribbon cable from the display to the J16 connector on the back of the SAM 9x60 Evaluation Kit board.

Power up the board by connecting the power adapter to power connector or a powered USB cable to the USB port on the SAM 9x60 Evaluation Kit board. The final hardware setup should be: 

On start-up, the application will display a splash screen. After the splash screen completes, the dashboard screen is shown. The initial state of the dashboard screen is “OFF” where the backlight is slightly dimmed, the needle in the 0 RPM position and the indicators and labels are hidden. Pressing the “ENGINE START STOP” button at the center-bottom section of the screen will “TURN ON” the dashboard. 

As the dashboard is turning on, the indicators and labels will show up, the tachometer needle will turn to MAX and back and the fuel gauge bars will go to full. 

Touching the screen will simulate a running vehicle, and the tachometer gauge needle, speed and distance labels, fuel gauge will change. Touching the left or right side of the screen will toggle the left or right-turn indicators. When the fuel gauge goes down to empty (“E”), the simulated vehicle will go to a stop and refuel. 

Touching the “ENGINE START STOP” button will “TURN OFF” the dashboard where the backlight will be dimmed and the indicators/labels will be hidden.