Atmel AVR32933 Manual de usuario

AVR32933: EVK1105AU Getting Started Guide

Features

• Powering up the board

• Preparing the board for audio playback

• Playing music

1 Introduction

The EVK1105AU is a reference design and development system for the

AT32UC3A0512AU, a 32-bit Atmel®AVR®audio microcontroller from Atmel

Corporation.

From a hardware point of view, the EVK1105AU is identical to the EVK1105, so

you can refer to the EVK1105 for more information (schematics, BOM, etc.). The

only difference is that the main microcontroller is an AT32UC3A0512AU instead of

an AT32UC3A0512.

The AT32UC3A0512AU is an audio microcontroller that authorizes execution of

Atmel licensed Audio firmware IPs such as commercial MP3, AAC, WMA audio

decoders.

The kit is equipped with a rich set of memories and peripherals that make the

EVK1105AU a perfect audio platform. This guide shows the user how to get quickly

started with this kit.

Figure 1-1 EVK1105AU board

32-bit Atmel

Microcontrollers

EVK1105AU

Getting Started

Guide

Rev. 32181A-AVR-11/11

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2 Powering up the board

The EVK1105AU offers three interfaces to power the board, from one of the two USB

interfaces or from an external source connected to the header J1. The board can be

powered from 3 different sources, external power supply, “USB VCP” and “USB

USER” connector. If two power sources are applied at the same time the following

priorities are used to select the current valid power source:

1. External power supply (header J1)

2. USB VCP

3. USB USER

That means that if an external power supply is connected to the board it has the

highest priority and will therefore serve as current power supply. Other power

supplies that are connected to the board at the same time will be ignored.

The input range on the external power supply header is from 3.3V to 5V. In order to

be able to supply external USB devices that are connected to the board the minimal

power supply specification should be 5V, 1A. This ensures that the board will work

properly if a USB device is connected that needs the maximum allowed 500mA as

specified in the USB specification. It is not possible to draw that amount of current

from the host through a normal USB cable but there are cables available that can be

connected to two hosts (such a cable is not a kit content).

In order to play music from a mass-storage device it is enough to power the board

from the USB VCP connector. Use the “Mini-B plug to std-A plug 1.5m USB2.0” cable

that is included in the kit and connect it between the host and the board USB VCP

connector.

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Figure 2-1 Possible power input interfaces on the EVK1105AU

More information about the different power inputs is available in the hardware user’s

guide.

When the board is powered the green LED, marked with “PWR”, will light up and the

default board firmware will start to run.

3 Preparing the board for audio playback

n order to play some music a USB mass-storage device must be connected to the

“USB USER” connector by using the “Mini-A plug to std-A receptacle” adaptor cable.

The adaptor cable is a kit content.

The default audio output should be configured to use the on board codec and thus the

jumpers on J6 should be set as indicated in the figure if not already set up like this.

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Figure 3-1 Jumper settings on J6 for codec output to headphones

Connect a headphone or speaker to the jack in order to listen to the music.

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4 Browsing the disk and playing music

After a mass-storage device has been connected to the USB-USER port the player

enters the disk browsing view. To control the application the touch sensors can be

used that are marked in the

Figure 4-1.

Figure 4-1 Touch sensors for controlling the audio application

4.1 Disk browsing view

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In this view it is possible to browse the storage media but only MP3 files and

directories will be shown. Use the touch sensors to browse the storage media for the

music file or playlist you want to play.

UP: Browse the file list up.

DOWN: Browse the file list down

LEFT: Enter the parent directory. If the user is in the root directory of the current

selected storage media a touch of this button will result in a menu which lets the user

select a storage media.

RIGHT: Enter a subdirectory or play the currently selected file or playlist.

CENTER or RIGHT: Play the currently selected file or playlist.

By playing a file or a playlist the audio player will change its view from the disk view to

the play view.

4.2 Play view

Following functionality have the touch sensors in the play view.

UP: Increase the volume.

DOWN: Decrease the volume.

LEFT: Play previous song in playlist or on disk.

RIGHT: Play the next song in playlist or on disk.

CENTER: Play/Pause.

Slide-LEFT*: go back to the navigation window. In this mode, the current file

is still playing, and the user can browse the disk and select a new audio file with

CENTER or RIGHT. User can also switch back to the play view with a Slide-RIGHT**:

it will display the current playing file.

Slide-RIGHT**: repeat/shuffle modes. While in the play mode, this key gives

access to the repeat/shuffle modes. UP or DOWN selects the Repeat or Shuffle

mode. Press CENTER to change mode. Go back to the Play view with Slide-LEFT*.

* Slide-LEFT consists of the following sequence: press CENTER, press LEFT,

release CENTER, release LEFT.

** Slide-RIGHT consists of the following sequence: press CENTER, press RIGHT,

release CENTER, release RIGHT.

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5 References and further information

EVK1105 hardware reference: This is included in the AVR Studio®5 and on the

avrfreaks wiki page (http://www.avrfreaks.net).

Support : [email protected]

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Atmel Corporation

2325 Orchard Parkway

San Jose, CA 95131

USA

Tel: (+1)(408) 441-0311

Fax: (+1)(408) 487-2600

www.atmel.com

Atmel Asia Limited

Unit 01-5 & 16, 19F

BEA Tower, Milennium City 5

418 Kwun Tong Road

Kwun Tong, Kowloon

HONG KONG

Tel: (+852) 2245-6100

Fax: (+852) 2722-1369

Atmel Munich GmbH

Business Campus

Parkring 4

D-85748 Garching b. Munich

GERMANY

Tel: (+49) 89-31970-0

Fax: (+49) 89-3194621

Atmel Japan

9F, Tonetsu Shinkawa Bldg.

1-24-8 Shinkawa

Chou-ku, Tokyo 104-0033

JAPAN

Tel: (+81) 3523-3551

Fax: (+81) 3523-7581

Atmel®, Atmel logo and combinations thereof, AVR Studio®, AVR®, AVR® logo, and others are registered trademarks or trademarks of

Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others.

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