Calculator example for the SAM4S-XPLAINED Documentation

Introduction

This example demonstrates a simple calculator on the display of the mXT143E Xplained, using the Widget Toolkit.

Main files:

• calculator.c: main example implementation
• widget_gui.c : display GUI creation and event handling
• widget_gui.h : header for the GUI management routines
• atmel_logo_small.h : Atmel logo for output to the display
• conf_board.h: board configuration
• conf_clock.h: system clock driver configuration
• conf_ili9341.h: display driver configuration
• conf_membag.h: memory bag allocation configuration
• conf_mxt.h: maXTouch driver configuration
• conf_sysfont.h: system font configuration
• conf_twim.h: TWI driver configuration
• conf_win.h: window system configuration
• conf_wtk.h: widget library configuration
• UC3 and SAM only: conf_spi_master.h: SPI master service configuration
• XMEGA only: conf_usart_spi.h: USART SPI service configuration

Widget library API

The widget library API can be found here, while the graphics service API can be found here. The maXTouch API can be found here.

Device Info

This example has been tested with the mXT143E Xplained on the following kits:

• UC3-A3 Xplained
• UC3-L0 Xplained
• XMEGA-A1 Xplained
• XMEGA-B1 Xplained
• XMEGA-A3BU Xplained
• SAM4S Xplained

Description of the example

This example application shows how widgets can be used to create a simple calculator, allowing the user to perform calculations by touching buttons on the display.

To perform a calculation, the user must first enter an operand (number), then an arithmetic operator ("+", "-", "*", "/") followed by the second operand. The calculation is performed when the "="-button is pressed.

Dependencies

Relevant module dependencies for this application are:

• Widget toolkit
• Graphical display system
• maXTouch low-level component

Compilation Info

This software was written for the GNU GCC and IAR for AVR. Other compilers may or may not work.

Contact Information

For further information, visit Microchip.