 Standard I/O (stdio) | Common standard I/O driver that implements the stdio read and write functions on AVR and SAM devices |
| Generic board support | The generic board support module includes board-specific definitions and function prototypes, such as the board initialization function |
 XMEGA compiler driver | Compiler abstraction layer and code utilities for 8-bit AVR |
 Assembler Support | This group provides a good handful of macros intended to smooth out the differences between various assemblers, similar to what compiler.h does for compilers, except that assemblers tend to be much less standardized than compilers |
| Macro Repeat | |
| Stringize | |
| Token Paste | |
| Program memory | |
 Status Codes | |
| Global interrupt management | This is a driver for global enabling and disabling of interrupts |
| Deprecated interrupt definitions | |
| Atmel part identification macros | This collection of macros identify which series and families that the various Atmel parts belong to |
| AVR UC3 parts | |
| AVR XMEGA parts | |
| megaAVR parts | |
| SAM parts | |
| maXTouch low-level component | See Quick start guide for the maXTouch component |
| Common IOPORT API | See Quick start guide for the common IOPORT service |
| Two Wire-interface(TWI) | This is the common API for TWIs |
| Clock Management | |
| Generic Clock Management | Generic clocks are configurable clocks which run outside the system clock domain |
| Oscillator Management | This group contains functions and definitions related to configuring and enabling/disabling on-chip oscillators |
| PLL Management | This group contains functions and definitions related to configuring and enabling/disabling on-chip PLLs |
| System Clock Management | See Quick Start Guide for the System Clock Management service (XMEGA) |
| Configuration Change Protection | See Quick start guide for CCP driver |
| XMEGA reset cause | See reset_cause_quickstart |
| TWI - Two-Wire Interface | See Quick start guide for XMEGA TWI driver |
| TWI Master | |
| TWI Slave | |
| Graphical display system | This service provides an interface to drawing graphics on a graphical display |
| Window System | Window system for organizing window elements in a graphical user interface (GUI) |
| Widget toolkit | The Widget toolkit implements many common widgets for use on a graphical display using the functionality of Window system and Graphics library |
| Basic frame widget | Basic frame widget provides a frame with only a background color |
| Button widget | |
| Check box widget | |
| Frame widget | Frame widget provides a frame with border and a title bar |
| Icon button widget | |
| Label widget | |
| Plot widget | |
| Plot widget options | These options can be ORed together to specify the behaviour of a plot widget when creating it with wtk_plot_create |
| Plot widget grid options | These options can be ORed together to specify the behaviour of a plot widget grid when adjusting it via wtk_plot_set_grid |
| Progress bar widget | |
| Progress bar widget options | These options can be ORed together to specify the behaviour of a progress bar widget when creating it with wtk_progress_bar_create |
| Radio button widget | |
 Slider widget | |
 Slider widget options | These options can be ORed together to specify the behaviour of a slider widget when creating it with wtk_slider_create |
| SDT028ATFT display using ILI9341 display controller | This is hardware specific configuration that configures the graphical service for use with the ILI9341 display controller and the SDT028ATFT display |
| Generic Implementation of Graphics Primitives | This is a library of generic implementations of various graphics primitives |
| Font support | This modules provides functionality for outputting a font to a display |
| System font | The system font objects are globally available for a graphical application |
| ILI9341 Display Controller Component Driver | See Quick Start Guide for the ILI9341 Display Controller Component Driver |
| USART in SPI (Serial Peripheral Interface) mode | This is the common API for USART in SPI mode |
| USART module (USART) | See Quick start guide for USART module |
| Programmable Multilevel Interrupt Controller | See Quick start guide for PMIC driver |
| Busy-Wait Delay Routines | This module provides simple loop-based delay routines for those applications requiring a brief wait during execution |
| Memory Bag Allocator | The Membag allocator is a optimized, fragmentationless general purpose memory allocator utility module designed to replace the standard C library malloc() and free() functions in resource constrained environments |
| XMEGA-A1 Xplained Board Configuration | |
| General Purpose Input/Output | This is the common API for GPIO |
1.8.5