Atmel AVR 1908 User manual

AVR1908: QTouch Xplained Hardware User's

Guide

• Xplain compatible top module for Atmel® capacitive touch - QTouch®

- Two buttons

- One slider

- One wheel

• Requires download of

- Atmel QTouch library software

- AVR QTouch® Studio for visualization of data (debug frontend)

- FLIP (Flexible In-system Programmer)

1 Introduction

QTouch Xplained is an easy to use low-cost evaluation kit, which demonstrates

QTouch and the QTouch Library features. The QTouch Xplained utilizes the Xplain

to do this.

The kit demonstrates how a QTouch solution requires only a very simple circuit

design and a minimum of external components. It includes support for eight

QTouch channels: a slider (3 channels), a wheel (3 channels) and two keys (1

channel each).

Figure 1-1. QTouch Xplained Evaluation board

8-bit

Microcontrollers

Application Note

Rev. 8275A-AVR-04/10

2 AVR1908 8275A-AVR-04/10

2 Getting started

2.1 Programming the firmware for the Xplain board

In order to get the QTouch board up and running the AT90USB1287 and

ATxmega128A1 device mounted on the Xplain board needs to be programmed. The

required firmware is included in the .zip file following this application note. For a

detailed description about programming the Xplain board, please refer to application

note AVR1921.

2.2 Connecting the QTouch Xplained

The QTouch Xplained needs to be connected to the Xplain in order to demonstrate

QTouch and the QTouch library features. This section provides all information needed

to connect the QTouch Xplained add-on board to the Xplain mother board, and then

connecting the bundle to the PC host in order to use it with QTouch Studio.

2.2.1 Connecting the QTouch Xplained to Xplain

The QTouch Xplained uses four 10-pin headers to connect to Xplain. This makes it

easy to connect and disconnect the QTouch Xplained from the Xplain board. Note

that the female SMD mounted pin-headers might get damaged if not handled

carefully. The plastic insulation might come off and exposes the conductors. Refer to

Figure 2-1 for an illustration how to connect the two boards together.

•Attach the QTouch Xplained to the Xplain board. The QTouch Xplained is

connected to the Xplain board by connecting the four 10-pin headers on the

QTouch Xplained (female) to the four 10-pin headers on the Xplain (male).

•The text orientation should be the same on both kits.

•Ensure that all four pin headers are properly connected.

Figure 2-1 Connecting the QTouch Xplained to the Xplain board

2.2.2 Connecting the QTouch Xplained & Xplain to the PC

The Xplain board must be connected to a host PC using an USB cable. The USB

connection is used for communication between the QTouch Studio and the

AVR1908

8275A-AVR-04/10

AT90USB1287 device, and to power the QTouch Xplained & Xplain boards. Refer to

Figure 2-2 to see how to connect to the PC.

•Connect an USB cable to the Xplain board and the host PC.

•If programmed correctly (see section Error! Reference source not found.), the

board will register as a Human Interface Device (HID), so no driver installation is

required for most modern operating systems.

•Launch QTouch Studio and wait for the Xplain board to register.

Figure 2-2 Connecting the QTouch Xplained & Xplain to the PC

3 Quick introduction to the QTouch Xplained features

The best way to learn how to use the QTouch Xplained is to go through the QTouch

Xplained training. This training is included in the zip file that is distributed with this

application note.

The QTouch Xplained consists of:

Figure 3-1 Slider

4 AVR1908 8275A-AVR-04/10

Figure 3-2 Wheel

Figure 3-3 Buttons

8275A-AVR-04/10

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